Adding upstream version 1.29.0.upstream/1.29.0

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

73 files changed, 585 insertions, 4920 deletions

diff --git a/collectors/charts.d.plugin/.keep b/collectors/charts.d.plugin/.keep
deleted file mode 100644
index e69de29bb..000000000
--- a/collectors/charts.d.plugin/.keep
+++ /dev/null
diff --git a/collectors/charts.d.plugin/Makefile.am b/collectors/charts.d.plugin/Makefile.am
index b3b2fb927..03c7f0a94 100644
--- a/collectors/charts.d.plugin/Makefile.am
+++ b/collectors/charts.d.plugin/Makefile.am
@@ -31,7 +31,6 @@ dist_charts_DATA = \
 
 userchartsconfigdir=$(configdir)/charts.d
 dist_userchartsconfig_DATA = \
-    .keep \
     $(NULL)
 
 # Explicitly install directories to avoid permission issues due to umask
@@ -43,22 +42,9 @@ dist_chartsconfig_DATA = \
     $(NULL)
 
 include ap/Makefile.inc
-include apache/Makefile.inc
 include apcupsd/Makefile.inc
-include cpu_apps/Makefile.inc
-include cpufreq/Makefile.inc
 include example/Makefile.inc
-include exim/Makefile.inc
-include hddtemp/Makefile.inc
 include libreswan/Makefile.inc
-include load_average/Makefile.inc
-include mem_apps/Makefile.inc
-include mysql/Makefile.inc
-include nginx/Makefile.inc
 include nut/Makefile.inc
 include opensips/Makefile.inc
-include phpfpm/Makefile.inc
-include postfix/Makefile.inc
 include sensors/Makefile.inc
-include squid/Makefile.inc
-include tomcat/Makefile.inc
diff --git a/collectors/charts.d.plugin/Makefile.in b/collectors/charts.d.plugin/Makefile.in
deleted file mode 100644
index dd19ca016..000000000
--- a/collectors/charts.d.plugin/Makefile.in
+++ /dev/null
@@ -1,1012 +0,0 @@
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-	uninstall-dist_chartsSCRIPTS uninstall-dist_chartsconfigDATA \
-	uninstall-dist_libconfigDATA uninstall-dist_pluginsSCRIPTS \
-	uninstall-dist_userchartsconfigDATA
-
-.PRECIOUS: Makefile
-
-.in:
-	if sed \
-		-e 's#[@]localstatedir_POST@#$(localstatedir)#g' \
-		-e 's#[@]sbindir_POST@#$(sbindir)#g' \
-		-e 's#[@]pluginsdir_POST@#$(pluginsdir)#g' \
-		-e 's#[@]configdir_POST@#$(configdir)#g' \
-		-e 's#[@]libconfigdir_POST@#$(libconfigdir)#g' \
-		-e 's#[@]cachedir_POST@#$(cachedir)#g' \
-		-e 's#[@]registrydir_POST@#$(registrydir)#g' \
-		-e 's#[@]varlibdir_POST@#$(varlibdir)#g' \
-		$< > $@.tmp; then \
-		mv "$@.tmp" "$@"; \
-	else \
-		rm -f "$@.tmp"; \
-		false; \
-	fi
-
-# Explicitly install directories to avoid permission issues due to umask
-install-exec-local:
-	$(INSTALL) -d $(DESTDIR)$(userchartsconfigdir)
-
-# Tell versions [3.59,3.63) of GNU make to not export all variables.
-# Otherwise a system limit (for SysV at least) may be exceeded.
-.NOEXPORT:
diff --git a/collectors/charts.d.plugin/README.md b/collectors/charts.d.plugin/README.md
index 6bd115f30..4a7911a60 100644
--- a/collectors/charts.d.plugin/README.md
+++ b/collectors/charts.d.plugin/README.md
@@ -1,3 +1,8 @@
+<!--
+title: "charts.d.plugin"
+custom_edit_url: https://github.com/netdata/netdata/edit/master/collectors/charts.d.plugin/README.md
+-->
+
 # charts.d.plugin
 
 `charts.d.plugin` is a Netdata external plugin. It is an **orchestrator** for data collection modules written in `BASH` v4+.
@@ -55,11 +60,11 @@ For a module called `X`, the following criteria must be met:
          the collector cannot be used).
 
     -   `X_create()` - creates the Netdata charts, following the standard Netdata plugin guides as described in
-         **[External Plugins](../plugins.d/)** (commands `CHART` and `DIMENSION`).
+         **[External Plugins](/collectors/plugins.d/README.md)** (commands `CHART` and `DIMENSION`).
          The return value does matter: 0 = OK, 1 = FAILED.
 
     -   `X_update()` - collects the values for the defined charts, following the standard Netdata plugin guides
-         as described in **[External Plugins](../plugins.d/)** (commands `BEGIN`, `SET`, `END`).
+         as described in **[External Plugins](/collectors/plugins.d/README.md)** (commands `BEGIN`, `SET`, `END`).
          The return value also matters: 0 = OK, 1 = FAILED.
 
 5.  The following global variables are available to be set:
@@ -67,7 +72,7 @@ For a module called `X`, the following criteria must be met:
 
 The module script may use more functions or variables. But all of them must begin with `X_`.
 
-The standard Netdata plugin variables are also available (check **[External Plugins](../plugins.d/)**). 
+The standard Netdata plugin variables are also available (check **[External Plugins](/collectors/plugins.d/README.md)**). 
 
 ### X_check()
 
@@ -81,7 +86,7 @@ connect to a local mysql database to find out if it can read the values it needs
 ### X_create()
 
 The purpose of the BASH function `X_create()` is to create the charts and dimensions using the standard Netdata
-plugin guides (**[External Plugins](../plugins.d/)**).
+plugin guides (**[External Plugins](/collectors/plugins.d/README.md)**).
 
 `X_create()` will be called just once and only after `X_check()` was successful.
 You can however call it yourself when there is need for it (for example to add a new dimension to an existing chart).
@@ -91,7 +96,7 @@ A non-zero return value will disable the collector.
 ### X_update()
 
 `X_update()` will be called repeatedly every `X_update_every` seconds, to collect new values and send them to Netdata,
-following the Netdata plugin guides (**[External Plugins](../plugins.d/)**).
+following the Netdata plugin guides (**[External Plugins](/collectors/plugins.d/README.md)**).
 
 The function will be called with one parameter: microseconds since the last time it was run. This value should be
 appended to the `BEGIN` statement of every chart updated by the collector script.
diff --git a/collectors/charts.d.plugin/ap/README.md b/collectors/charts.d.plugin/ap/README.md
index befe21eec..35a00d65d 100644
--- a/collectors/charts.d.plugin/ap/README.md
+++ b/collectors/charts.d.plugin/ap/README.md
@@ -1,4 +1,10 @@
-# Access Point Plugin (ap)
+<!--
+title: "Access point monitoring with Netdata"
+custom_edit_url: https://github.com/netdata/netdata/edit/master/collectors/charts.d.plugin/ap/README.md
+sidebar_label: "Access points"
+-->
+
+# Access point monitoring with Netdata
 
 The `ap` collector visualizes data related to access points.
 
@@ -76,8 +82,15 @@ Station 40:b8:37:5a:ed:5e (on wlan0)
 
 ## Configuration
 
-You can only set `ap_update_every=NUMBER` to `/etc/netdata/charts.d/ap.conf`, to give the data collection frequency.
-To edit this file on your system run `/etc/netdata/edit-config charts.d/ap.conf`.
+Edit the `charts.d/ap.conf` configuration file using `edit-config` from the Netdata [config
+directory](/docs/configure/nodes.md), which is typically at `/etc/netdata`.
+
+```bash
+cd /etc/netdata   # Replace this path with your Netdata config directory, if different
+sudo ./edit-config charts.d/ap.conf
+```
+
+You can only set `ap_update_every=NUMBER` to change the data collection frequency.
 
 ## Auto-detection
 
diff --git a/collectors/charts.d.plugin/ap/ap.chart.sh b/collectors/charts.d.plugin/ap/ap.chart.sh
index a2d04c0a7..5dd787835 100644
--- a/collectors/charts.d.plugin/ap/ap.chart.sh
+++ b/collectors/charts.d.plugin/ap/ap.chart.sh
@@ -16,9 +16,9 @@ declare -A ap_devs=()
 
 # _check is called once, to find out if this chart should be enabled or not
 ap_check() {
-	require_cmd iw || return 1
-	local ev
-	ev=$(run iw dev | awk '
+  require_cmd iw || return 1
+  local ev
+  ev=$(run iw dev | awk '
 		BEGIN {
 			i = "";
 			ssid = "";
@@ -41,26 +41,26 @@ ap_check() {
 			}
 		}
 	')
-	eval "${ev}"
+  eval "${ev}"
 
-	# this should return:
-	#  - 0 to enable the chart
-	#  - 1 to disable the chart
+  # this should return:
+  #  - 0 to enable the chart
+  #  - 1 to disable the chart
 
-	[ ${#ap_devs[@]} -gt 0 ] && return 0
-	error "no devices found in AP mode, with 'iw dev'"
-	return 1
+  [ ${#ap_devs[@]} -gt 0 ] && return 0
+  error "no devices found in AP mode, with 'iw dev'"
+  return 1
 }
 
 # _create is called once, to create the charts
 ap_create() {
-	local ssid dev
+  local ssid dev
 
-	for dev in "${!ap_devs[@]}"; do
-		ssid="${ap_devs[${dev}]}"
+  for dev in "${!ap_devs[@]}"; do
+    ssid="${ap_devs[${dev}]}"
 
-		# create the chart with 3 dimensions
-		cat <<EOF
+    # create the chart with 3 dimensions
+    cat << EOF
 CHART ap_clients.${dev} '' "Connected clients to ${ssid} on ${dev}" "clients" ${dev} ap.clients line $((ap_priority + 1)) $ap_update_every
 DIMENSION clients '' absolute 1 1
 
@@ -84,25 +84,25 @@ DIMENSION receive '' absolute 1 1000
 DIMENSION transmit '' absolute -1 1000
 DIMENSION expected 'expected throughput' absolute 1 1000
 EOF
-	done
+  done
 
-	return 0
+  return 0
 }
 
 # _update is called continuously, to collect the values
 ap_update() {
-	# the first argument to this function is the microseconds since last update
-	# pass this parameter to the BEGIN statement (see bellow).
-
-	# do all the work to collect / calculate the values
-	# for each dimension
-	# remember: KEEP IT SIMPLE AND SHORT
-
-	for dev in "${!ap_devs[@]}"; do
-		echo
-		echo "DEVICE ${dev}"
-		iw "${dev}" station dump
-	done | awk '
+  # the first argument to this function is the microseconds since last update
+  # pass this parameter to the BEGIN statement (see bellow).
+
+  # do all the work to collect / calculate the values
+  # for each dimension
+  # remember: KEEP IT SIMPLE AND SHORT
+
+  for dev in "${!ap_devs[@]}"; do
+    echo
+    echo "DEVICE ${dev}"
+    iw "${dev}" station dump
+  done | awk '
         function zero_data() {
             dev = "";
             c = 0;
@@ -175,5 +175,5 @@ ap_update() {
         }
     '
 
-	return 0
+  return 0
 }
diff --git a/collectors/charts.d.plugin/apache/Makefile.inc b/collectors/charts.d.plugin/apache/Makefile.inc
deleted file mode 100644
index 4b360eae0..000000000
--- a/collectors/charts.d.plugin/apache/Makefile.inc
+++ /dev/null
@@ -1,13 +0,0 @@
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-# THIS IS NOT A COMPLETE Makefile
-# IT IS INCLUDED BY ITS PARENT'S Makefile.am
-# IT IS REQUIRED TO REFERENCE ALL FILES RELATIVE TO THE PARENT
-
-# install these files
-dist_charts_DATA       += apache/apache.chart.sh
-dist_chartsconfig_DATA += apache/apache.conf
-
-# do not install these files, but include them in the distribution
-dist_noinst_DATA       += apache/README.md apache/Makefile.inc
-
diff --git a/collectors/charts.d.plugin/apache/README.md b/collectors/charts.d.plugin/apache/README.md
deleted file mode 100644
index 53f02a5b8..000000000
--- a/collectors/charts.d.plugin/apache/README.md
+++ /dev/null
@@ -1,129 +0,0 @@
-# Apache
-
-> THIS MODULE IS OBSOLETE.
-> USE [THE PYTHON ONE](../../python.d.plugin/apache) - IT SUPPORTS MULTIPLE JOBS AND IT IS MORE EFFICIENT
-
----
-
-The `apache` collector visualizes key performance data for an apache web server.
-
-## Example Netdata charts
-
-For apache 2.2:
-
-![image](https://cloud.githubusercontent.com/assets/2662304/12530273/421c4d14-c1e2-11e5-9fb6-ca6d6dd3b1dd.png)
-
-For apache 2.4:
-
-![image](https://cloud.githubusercontent.com/assets/2662304/12530376/29ec26de-c1e6-11e5-9af1-e48aaf781795.png)
-
-## How it works
-
-It runs `curl "http://apache.host/server-status?auto` to fetch the current status of apache.
-
-It has been tested with apache 2.2 and apache 2.4. The latter also provides connections information (total and break down by status).
-
-Apache 2.2 response:
-
-```sh
-curl "http://127.0.0.1/server-status?auto"
-Total Accesses: 80057
-Total kBytes: 223017
-CPULoad: .018287
-Uptime: 64472
-ReqPerSec: 1.24173
-BytesPerSec: 3542.15
-BytesPerReq: 2852.59
-BusyWorkers: 1
-IdleWorkers: 49
-Scoreboard: _________________________......................................._W_______________________.......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
-```
-
-Apache 2.4 response:
-
-```sh
-curl "http://127.0.0.1/server-status?auto"
-127.0.0.1
-ServerVersion: Apache/2.4.18 (Unix)
-ServerMPM: event
-Server Built: Dec 14 2015 08:05:54
-CurrentTime: Saturday, 23-Jan-2016 14:42:06 EET
-RestartTime: Saturday, 23-Jan-2016 04:57:13 EET
-ParentServerConfigGeneration: 2
-ParentServerMPMGeneration: 1
-ServerUptimeSeconds: 35092
-ServerUptime: 9 hours 44 minutes 52 seconds
-Load1: 0.32
-Load5: 0.32
-Load15: 0.27
-Total Accesses: 32403
-Total kBytes: 34464
-CPUUser: 30.37
-CPUSystem: 29.55
-CPUChildrenUser: 0
-CPUChildrenSystem: 0
-CPULoad: .170751
-Uptime: 35092
-ReqPerSec: .923373
-BytesPerSec: 1005.67
-BytesPerReq: 1089.13
-BusyWorkers: 1
-IdleWorkers: 99
-ConnsTotal: 0
-ConnsAsyncWriting: 0
-ConnsAsyncKeepAlive: 0
-ConnsAsyncClosing: 0
-Scoreboard: __________________________________________________________________________________________W_________............................................................................................................................................................................................................................................................................................................
-```
-
-From the apache status output it collects:
-
--   total accesses (incremental value, rendered as requests/s)
--   total bandwidth (incremental value, rendered as bandwidth/s)
--   requests per second (this appears to be calculated by apache as an average for its lifetime, while the one calculated by Netdata using the total accesses counter is real-time)
--   bytes per second (average for the lifetime of the apache server)
--   bytes per request (average for the lifetime of the apache server)
--   workers by status (`busy` and `idle`)
--   total connections (currently active connections - offered by apache 2.4+)
--   async connections per status (`keepalive`, `writing`, `closing` - offered by apache 2.4+)
-
-## Configuration
-
-The configuration is stored in `/etc/netdata/charts.d/apache.conf`.
-To edit this file on your system run `/etc/netdata/edit-config charts.d/apache.conf`.
-
-The internal default is:
-
-```sh
-# the URL your apache server is responding with mod_status information.
-apache_url="http://127.0.0.1:80/server-status?auto"
-
-# use this to set custom curl options you may need
-apache_curl_opts=
-
-# set this to a NUMBER to overwrite the update frequency
-# it is in seconds
-apache_update_every=
-```
-
-The default `apache_update_every` is configured in Netdata.
-
-## Auto-detection
-
-If you have configured your apache server to offer server-status information on localhost clients, the defaults should work fine.
-
-## Apache Configuration
-
-Apache configuration differs between distributions. Please check your distribution's documentation for information on enabling apache's `mod_status` module.
-
-If you are able to run successfully, by hand this command:
-
-```sh
-curl "http://127.0.0.1:80/server-status?auto"
-```
-
-Netdata will be able to do it too.
-
-Notice: You may need to have the default `000-default.conf` website enabled in order for the status mod to work.
-
-[![analytics](https://www.google-analytics.com/collect?v=1&aip=1&t=pageview&_s=1&ds=github&dr=https%3A%2F%2Fgithub.com%2Fnetdata%2Fnetdata&dl=https%3A%2F%2Fmy-netdata.io%2Fgithub%2Fcollectors%2Fcharts.d.plugin%2Fapache%2FREADME&_u=MAC~&cid=5792dfd7-8dc4-476b-af31-da2fdb9f93d2&tid=UA-64295674-3)](<>)
diff --git a/collectors/charts.d.plugin/apache/apache.chart.sh b/collectors/charts.d.plugin/apache/apache.chart.sh
deleted file mode 100644
index 7d09ee676..000000000
--- a/collectors/charts.d.plugin/apache/apache.chart.sh
+++ /dev/null
@@ -1,251 +0,0 @@
-# shellcheck shell=bash
-# no need for shebang - this file is loaded from charts.d.plugin
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-# netdata
-# real-time performance and health monitoring, done right!
-# (C) 2016 Costa Tsaousis <costa@tsaousis.gr>
-#
-
-# the URL to download apache status info
-apache_url="http://127.0.0.1:80/server-status?auto"
-apache_curl_opts=
-
-# _update_every is a special variable - it holds the number of seconds
-# between the calls of the _update() function
-apache_update_every=
-
-apache_priority=60000
-
-# convert apache floating point values
-# to integer using this multiplier
-# this only affects precision - the values
-# will be in the proper units
-apache_decimal_detail=1000000
-
-declare -a apache_response=()
-apache_accesses=0
-apache_kbytes=0
-apache_reqpersec=0
-apache_bytespersec=0
-apache_bytesperreq=0
-apache_busyworkers=0
-apache_idleworkers=0
-apache_connstotal=0
-apache_connsasyncwriting=0
-apache_connsasynckeepalive=0
-apache_connsasyncclosing=0
-
-apache_keys_detected=0
-apache_has_conns=0
-apache_key_accesses=
-apache_key_kbytes=
-apache_key_reqpersec=
-apache_key_bytespersec=
-apache_key_bytesperreq=
-apache_key_busyworkers=
-apache_key_idleworkers=
-apache_key_scoreboard=
-apache_key_connstotal=
-apache_key_connsasyncwriting=
-apache_key_connsasynckeepalive=
-apache_key_connsasyncclosing=
-apache_detect() {
-	local i=0
-	for x in "${@}"; do
-		case "${x}" in
-		'Total Accesses') apache_key_accesses=$((i + 1)) ;;
-		'Total kBytes') apache_key_kbytes=$((i + 1)) ;;
-		'ReqPerSec') apache_key_reqpersec=$((i + 1)) ;;
-		'BytesPerSec') apache_key_bytespersec=$((i + 1)) ;;
-		'BytesPerReq') apache_key_bytesperreq=$((i + 1)) ;;
-		'BusyWorkers') apache_key_busyworkers=$((i + 1)) ;;
-		'IdleWorkers') apache_key_idleworkers=$((i + 1)) ;;
-		'ConnsTotal') apache_key_connstotal=$((i + 1)) ;;
-		'ConnsAsyncWriting') apache_key_connsasyncwriting=$((i + 1)) ;;
-		'ConnsAsyncKeepAlive') apache_key_connsasynckeepalive=$((i + 1)) ;;
-		'ConnsAsyncClosing') apache_key_connsasyncclosing=$((i + 1)) ;;
-		'Scoreboard') apache_key_scoreboard=$((i)) ;;
-		esac
-
-		i=$((i + 1))
-	done
-
-	# we will not check of the Conns*
-	# keys, since these are apache 2.4 specific
-	[ -z "${apache_key_accesses}" ] && error "missing 'Total Accesses' from apache server: ${*}" && return 1
-	[ -z "${apache_key_kbytes}" ] && error "missing 'Total kBytes' from apache server: ${*}" && return 1
-	[ -z "${apache_key_reqpersec}" ] && error "missing 'ReqPerSec' from apache server: ${*}" && return 1
-	[ -z "${apache_key_bytespersec}" ] && error "missing 'BytesPerSec' from apache server: ${*}" && return 1
-	[ -z "${apache_key_bytesperreq}" ] && error "missing 'BytesPerReq' from apache server: ${*}" && return 1
-	[ -z "${apache_key_busyworkers}" ] && error "missing 'BusyWorkers' from apache server: ${*}" && return 1
-	[ -z "${apache_key_idleworkers}" ] && error "missing 'IdleWorkers' from apache server: ${*}" && return 1
-	[ -z "${apache_key_scoreboard}" ] && error "missing 'Scoreboard' from apache server: ${*}" && return 1
-
-	if [ ! -z "${apache_key_connstotal}" ] &&
-		[ ! -z "${apache_key_connsasyncwriting}" ] &&
-		[ ! -z "${apache_key_connsasynckeepalive}" ] &&
-		[ ! -z "${apache_key_connsasyncclosing}" ]; then
-		apache_has_conns=1
-	else
-		apache_has_conns=0
-	fi
-
-	return 0
-}
-
-apache_get() {
-	local oIFS="${IFS}" ret
-	# shellcheck disable=2207
-	IFS=$':\n' apache_response=($(run curl -Ss ${apache_curl_opts} "${apache_url}"))
-	ret=$?
-	IFS="${oIFS}"
-
-	if [ $ret -ne 0 ] || [ "${#apache_response[@]}" -eq 0 ]; then
-		return 1
-	fi
-
-	# the last line on the apache output is "Scoreboard"
-	# we use this label to detect that the output has a new word count
-	if [ ${apache_keys_detected} -eq 0 ] || [ "${apache_response[${apache_key_scoreboard}]}" != "Scoreboard" ]; then
-		apache_detect "${apache_response[@]}" || return 1
-		apache_keys_detected=1
-	fi
-
-	apache_accesses="${apache_response[${apache_key_accesses}]}"
-	apache_kbytes="${apache_response[${apache_key_kbytes}]}"
-
-	float2int "${apache_response[${apache_key_reqpersec}]}" ${apache_decimal_detail}
-	apache_reqpersec=${FLOAT2INT_RESULT}
-
-	float2int "${apache_response[${apache_key_bytespersec}]}" ${apache_decimal_detail}
-	apache_bytespersec=${FLOAT2INT_RESULT}
-
-	float2int "${apache_response[${apache_key_bytesperreq}]}" ${apache_decimal_detail}
-	apache_bytesperreq=${FLOAT2INT_RESULT}
-
-	apache_busyworkers="${apache_response[${apache_key_busyworkers}]}"
-	apache_idleworkers="${apache_response[${apache_key_idleworkers}]}"
-
-	if
-		[ -z "${apache_accesses}" ] ||
-			[ -z "${apache_kbytes}" ] ||
-			[ -z "${apache_reqpersec}" ] ||
-			[ -z "${apache_bytespersec}" ] ||
-			[ -z "${apache_bytesperreq}" ] ||
-			[ -z "${apache_busyworkers}" ]
-		[ -z "${apache_idleworkers}" ]
-	then
-		error "empty values got from apache server: ${apache_response[*]}"
-		return 1
-	fi
-
-	if [ ${apache_has_conns} -eq 1 ]; then
-		apache_connstotal="${apache_response[${apache_key_connstotal}]}"
-		apache_connsasyncwriting="${apache_response[${apache_key_connsasyncwriting}]}"
-		apache_connsasynckeepalive="${apache_response[${apache_key_connsasynckeepalive}]}"
-		apache_connsasyncclosing="${apache_response[${apache_key_connsasyncclosing}]}"
-	fi
-
-	return 0
-}
-
-# _check is called once, to find out if this chart should be enabled or not
-apache_check() {
-
-	apache_get
-	# shellcheck disable=2181
-	if [ $? -ne 0 ]; then
-		# shellcheck disable=2154
-		error "cannot find stub_status on URL '${apache_url}'. Please set apache_url='http://apache.server:80/server-status?auto' in $confd/apache.conf"
-		return 1
-	fi
-
-	# this should return:
-	#  - 0 to enable the chart
-	#  - 1 to disable the chart
-
-	return 0
-}
-
-# _create is called once, to create the charts
-apache_create() {
-	cat <<EOF
-CHART apache_local.bytesperreq '' "apache Lifetime Avg. Response Size" "bytes/request" statistics apache.bytesperreq area $((apache_priority + 8)) $apache_update_every
-DIMENSION size '' absolute 1 ${apache_decimal_detail}
-CHART apache_local.workers '' "apache Workers" "workers" workers apache.workers stacked $((apache_priority + 5)) $apache_update_every
-DIMENSION idle '' absolute 1 1
-DIMENSION busy '' absolute 1 1
-CHART apache_local.reqpersec '' "apache Lifetime Avg. Requests/s" "requests/s" statistics apache.reqpersec line $((apache_priority + 6)) $apache_update_every
-DIMENSION requests '' absolute 1 ${apache_decimal_detail}
-CHART apache_local.bytespersec '' "apache Lifetime Avg. Bandwidth/s" "kilobits/s" statistics apache.bytespersec area $((apache_priority + 7)) $apache_update_every
-DIMENSION sent '' absolute 8 $((apache_decimal_detail * 1000))
-CHART apache_local.requests '' "apache Requests" "requests/s" requests apache.requests line $((apache_priority + 1)) $apache_update_every
-DIMENSION requests '' incremental 1 1
-CHART apache_local.net '' "apache Bandwidth" "kilobits/s" bandwidth apache.net area $((apache_priority + 3)) $apache_update_every
-DIMENSION sent '' incremental 8 1
-EOF
-
-	if [ ${apache_has_conns} -eq 1 ]; then
-		cat <<EOF2
-CHART apache_local.connections '' "apache Connections" "connections" connections apache.connections line $((apache_priority + 2)) $apache_update_every
-DIMENSION connections '' absolute 1 1
-CHART apache_local.conns_async '' "apache Async Connections" "connections" connections apache.conns_async stacked $((apache_priority + 4)) $apache_update_every
-DIMENSION keepalive '' absolute 1 1
-DIMENSION closing '' absolute 1 1
-DIMENSION writing '' absolute 1 1
-EOF2
-	fi
-
-	return 0
-}
-
-# _update is called continuously, to collect the values
-apache_update() {
-	# the first argument to this function is the microseconds since last update
-	# pass this parameter to the BEGIN statement (see bellow).
-
-	# do all the work to collect / calculate the values
-	# for each dimension
-	# remember: KEEP IT SIMPLE AND SHORT
-
-	apache_get || return 1
-
-	# write the result of the work.
-	cat <<VALUESEOF
-BEGIN apache_local.requests $1
-SET requests = $((apache_accesses))
-END
-BEGIN apache_local.net $1
-SET sent = $((apache_kbytes))
-END
-BEGIN apache_local.reqpersec $1
-SET requests = $((apache_reqpersec))
-END
-BEGIN apache_local.bytespersec $1
-SET sent = $((apache_bytespersec))
-END
-BEGIN apache_local.bytesperreq $1
-SET size = $((apache_bytesperreq))
-END
-BEGIN apache_local.workers $1
-SET idle = $((apache_idleworkers))
-SET busy = $((apache_busyworkers))
-END
-VALUESEOF
-
-	if [ ${apache_has_conns} -eq 1 ]; then
-		cat <<VALUESEOF2
-BEGIN apache_local.connections $1
-SET connections = $((apache_connstotal))
-END
-BEGIN apache_local.conns_async $1
-SET keepalive = $((apache_connsasynckeepalive))
-SET closing = $((apache_connsasyncclosing))
-SET writing = $((apache_connsasyncwriting))
-END
-VALUESEOF2
-	fi
-
-	return 0
-}
diff --git a/collectors/charts.d.plugin/apache/apache.conf b/collectors/charts.d.plugin/apache/apache.conf
deleted file mode 100644
index 50914cf32..000000000
--- a/collectors/charts.d.plugin/apache/apache.conf
+++ /dev/null
@@ -1,30 +0,0 @@
-# no need for shebang - this file is loaded from charts.d.plugin
-
-# netdata
-# real-time performance and health monitoring, done right!
-# (C) 2018 Costa Tsaousis <costa@tsaousis.gr>
-# GPL v3+
-
-# THIS PLUGIN IS DEPRECATED
-# USE THE PYTHON.D ONE
-
-# the URL to download apache status info
-#apache_url="http://127.0.0.1:80/server-status?auto"
-#apache_curl_opts=
-
-# convert apache floating point values
-# to integer using this multiplier
-# this only affects precision - the values
-# will be in the proper units
-#apache_decimal_detail=1000000
-
-# the data collection frequency
-# if unset, will inherit the netdata update frequency
-#apache_update_every=
-
-# the charts priority on the dashboard
-#apache_priority=60000
-
-# the number of retries to do in case of failure
-# before disabling the module
-#apache_retries=10
diff --git a/collectors/charts.d.plugin/apcupsd/README.md b/collectors/charts.d.plugin/apcupsd/README.md
index 51bb6eccd..b5b41e84d 100644
--- a/collectors/charts.d.plugin/apcupsd/README.md
+++ b/collectors/charts.d.plugin/apcupsd/README.md
@@ -1,7 +1,21 @@
-# apcupsd
+<!--
+title: "APC UPS monitoring with Netdata"
+custom_edit_url: https://github.com/netdata/netdata/edit/master/collectors/charts.d.plugin/apcupsd/README.md
+sidebar_label: "APC UPS"
+-->
 
-_Under construction_
+# APC UPS monitoring with Netdata
 
-Collects UPS metrics
+Monitors different APC UPS models and retrieves status information using `apcaccess` tool.
+
+## Configuration
+
+Edit the `charts.d/apcupsd.conf` configuration file using `edit-config` from the Netdata [config
+directory](/docs/configure/nodes.md), which is typically at `/etc/netdata`.
+
+```bash
+cd /etc/netdata   # Replace this path with your Netdata config directory, if different
+sudo ./edit-config charts.d/apcupsd.conf
+```
 
 [![analytics](https://www.google-analytics.com/collect?v=1&aip=1&t=pageview&_s=1&ds=github&dr=https%3A%2F%2Fgithub.com%2Fnetdata%2Fnetdata&dl=https%3A%2F%2Fmy-netdata.io%2Fgithub%2Fcollectors%2Fcharts.d.plugin%2Fapcupsd%2FREADME&_u=MAC~&cid=5792dfd7-8dc4-476b-af31-da2fdb9f93d2&tid=UA-64295674-3)](<>)
diff --git a/collectors/charts.d.plugin/apcupsd/apcupsd.chart.sh b/collectors/charts.d.plugin/apcupsd/apcupsd.chart.sh
index 31ff93160..014a9c1de 100644
--- a/collectors/charts.d.plugin/apcupsd/apcupsd.chart.sh
+++ b/collectors/charts.d.plugin/apcupsd/apcupsd.chart.sh
@@ -11,7 +11,7 @@ apcupsd_ip=
 apcupsd_port=
 
 declare -A apcupsd_sources=(
-	["local"]="127.0.0.1:3551"
+  ["local"]="127.0.0.1:3551"
 )
 
 # how frequently to collect UPS data
@@ -23,55 +23,63 @@ apcupsd_timeout=3
 apcupsd_priority=90000
 
 apcupsd_get() {
-	run -t $apcupsd_timeout apcaccess status "$1"
+  run -t $apcupsd_timeout apcaccess status "$1"
+}
+
+is_ups_alive() {
+  local status
+  status="$(apcupsd_get "$1" | sed -e 's/STATUS.*: //' -e 't' -e 'd')"
+  case "$status" in
+    "" | "COMMLOST" | "SHUTTING DOWN") return 1 ;;
+    *) return 0 ;;
+  esac
 }
 
 apcupsd_check() {
 
-	# this should return:
-	#  - 0 to enable the chart
-	#  - 1 to disable the chart
-
-	require_cmd apcaccess || return 1
-
-	# backwards compatibility
-	if [ "${apcupsd_ip}:${apcupsd_port}" != ":" ]; then
-		apcupsd_sources["local"]="${apcupsd_ip}:${apcupsd_port}"
-	fi
-
-	local host working=0 failed=0
-	for host in "${!apcupsd_sources[@]}"; do
-		run apcupsd_get "${apcupsd_sources[${host}]}" >/dev/null
-		# shellcheck disable=2181
-		if [ $? -ne 0 ]; then
-			error "cannot get information for apcupsd server ${host} on ${apcupsd_sources[${host}]}."
-			failed=$((failed + 1))
-		else
-			apcupsd_status="$(apcupsd_get ${apcupsd_sources[${host}]} | awk '/^STATUS.*/{ print $3 }')"
-			if [ "${apcupsd_status}" != "ONLINE" ]  && [ "${apcupsd_status}" != "ONBATT" ]; then
-				error "APC UPS ${host} on ${apcupsd_sources[${host}]} is not online."
-				failed=$((failed + 1))
-			else
-				working=$((working + 1))
-			fi
-		fi
-	done
-
-	if [ ${working} -eq 0 ]; then
-		error "No APC UPSes found available."
-		return 1
-	fi
-
-	return 0
+  # this should return:
+  #  - 0 to enable the chart
+  #  - 1 to disable the chart
+
+  require_cmd apcaccess || return 1
+
+  # backwards compatibility
+  if [ "${apcupsd_ip}:${apcupsd_port}" != ":" ]; then
+    apcupsd_sources["local"]="${apcupsd_ip}:${apcupsd_port}"
+  fi
+
+  local host working=0 failed=0
+  for host in "${!apcupsd_sources[@]}"; do
+    run apcupsd_get "${apcupsd_sources[${host}]}" > /dev/null
+    # shellcheck disable=2181
+    if [ $? -ne 0 ]; then
+      error "cannot get information for apcupsd server ${host} on ${apcupsd_sources[${host}]}."
+      failed=$((failed + 1))
+    else
+      if ! is_ups_alive ${apcupsd_sources[${host}]}; then
+        error "APC UPS ${host} on ${apcupsd_sources[${host}]} is not online."
+        failed=$((failed + 1))
+      else
+        working=$((working + 1))
+      fi
+    fi
+  done
+
+  if [ ${working} -eq 0 ]; then
+    error "No APC UPSes found available."
+    return 1
+  fi
+
+  return 0
 }
 
 apcupsd_create() {
-	local host src
-	for host in "${!apcupsd_sources[@]}"; do
-		src=${apcupsd_sources[${host}]}
+  local host src
+  for host in "${!apcupsd_sources[@]}"; do
+    src=${apcupsd_sources[${host}]}
 
-		# create the charts
-		cat <<EOF
+    # create the charts
+    cat << EOF
 CHART apcupsd_${host}.charge '' "UPS Charge for ${host} on ${src}" "percentage" ups apcupsd.charge area $((apcupsd_priority + 1)) $apcupsd_update_every
 DIMENSION battery_charge charge absolute 1 100
 
@@ -104,21 +112,21 @@ CHART apcupsd_${host}.online '' "UPS ONLINE flag for ${host} on ${src}" "boolean
 DIMENSION online online absolute 0 1
 
 EOF
-	done
-	return 0
+  done
+  return 0
 }
 
 apcupsd_update() {
-	# the first argument to this function is the microseconds since last update
-	# pass this parameter to the BEGIN statement (see bellow).
+  # the first argument to this function is the microseconds since last update
+  # pass this parameter to the BEGIN statement (see bellow).
 
-	# do all the work to collect / calculate the values
-	# for each dimension
-	# remember: KEEP IT SIMPLE AND SHORT
+  # do all the work to collect / calculate the values
+  # for each dimension
+  # remember: KEEP IT SIMPLE AND SHORT
 
-	local host working=0 failed=0
-	for host in "${!apcupsd_sources[@]}"; do
-		apcupsd_get "${apcupsd_sources[${host}]}" | awk "
+  local host working=0 failed=0
+  for host in "${!apcupsd_sources[@]}"; do
+    apcupsd_get "${apcupsd_sources[${host}]}" | awk "
 
 BEGIN {
 	battery_charge = 0;
@@ -190,16 +198,16 @@ END {
 		print \"END\"
 	}
 }"
-		# shellcheck disable=SC2181
-		if [ $? -ne 0 ]; then
-			failed=$((failed + 1))
-			error "failed to get values for APC UPS ${host} on ${apcupsd_sources[${host}]}" && return 1
-		else
-			working=$((working + 1))
-		fi
-	done
-
-	[ $working -eq 0 ] && error "failed to get values from all APC UPSes" && return 1
-
-	return 0
+    # shellcheck disable=SC2181
+    if [ $? -ne 0 ]; then
+      failed=$((failed + 1))
+      error "failed to get values for APC UPS ${host} on ${apcupsd_sources[${host}]}" && return 1
+    else
+      working=$((working + 1))
+    fi
+  done
+
+  [ $working -eq 0 ] && error "failed to get values from all APC UPSes" && return 1
+
+  return 0
 }
diff --git a/collectors/charts.d.plugin/charts.d.conf b/collectors/charts.d.plugin/charts.d.conf
index 94c40cf6f..d6add5e5b 100644
--- a/collectors/charts.d.plugin/charts.d.conf
+++ b/collectors/charts.d.plugin/charts.d.conf
@@ -45,21 +45,3 @@
 # Nothing useful.
 # Just an example charts.d plugin you can use as a template.
 # example=force
-
-# OLD MODULES THAT ARE NOW SERVED BY python.d.plugin
-# apache=force
-# cpufreq=force
-# exim=force
-# hddtemp=force
-# mysql=force
-# nginx=force
-# phpfpm=force
-# postfix=force
-# sensors=force
-# squid=force
-# tomcat=force
-
-# OLD MODULES THAT ARE NOW SERVED BY NETDATA DAEMON
-# cpu_apps=force
-# mem_apps=force
-# load_average=force
diff --git a/collectors/charts.d.plugin/charts.d.plugin b/collectors/charts.d.plugin/charts.d.plugin
deleted file mode 100644
index 40dc48c15..000000000
--- a/collectors/charts.d.plugin/charts.d.plugin
+++ /dev/null
@@ -1,698 +0,0 @@
-#!/usr/bin/env bash
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-# netdata
-# real-time performance and health monitoring, done right!
-# (C) 2017 Costa Tsaousis <costa@tsaousis.gr>
-# GPL v3+
-#
-# charts.d.plugin allows easy development of BASH plugins
-#
-# if you need to run parallel charts.d processes, link this file to a different name
-# in the same directory, with a .plugin suffix and netdata will start both of them,
-# each will have a different config file and modules configuration directory.
-#
-
-export PATH="${PATH}:/sbin:/usr/sbin:/usr/local/bin:/usr/local/sbin"
-
-PROGRAM_FILE="$0"
-PROGRAM_NAME="$(basename $0)"
-PROGRAM_NAME="${PROGRAM_NAME/.plugin/}"
-MODULE_NAME="main"
-
-# -----------------------------------------------------------------------------
-# create temp dir
-
-debug=0
-TMP_DIR=
-chartsd_cleanup() {
-	trap '' EXIT QUIT HUP INT TERM
-
-	if [ ! -z "$TMP_DIR" -a -d "$TMP_DIR" ]; then
-		[ $debug -eq 1 ] && echo >&2 "$PROGRAM_NAME: cleaning up temporary directory $TMP_DIR ..."
-		rm -rf "$TMP_DIR"
-	fi
-	exit 0
-}
-trap chartsd_cleanup EXIT QUIT HUP INT TERM
-
-if [ $UID = "0" ]; then
-	TMP_DIR="$(mktemp -d /var/run/netdata-${PROGRAM_NAME}-XXXXXXXXXX)"
-else
-	TMP_DIR="$(mktemp -d /tmp/.netdata-${PROGRAM_NAME}-XXXXXXXXXX)"
-fi
-
-logdate() {
-	date "+%Y-%m-%d %H:%M:%S"
-}
-
-log() {
-	local status="${1}"
-	shift
-
-	echo >&2 "$(logdate): ${PROGRAM_NAME}: ${status}: ${MODULE_NAME}: ${*}"
-
-}
-
-warning() {
-	log WARNING "${@}"
-}
-
-error() {
-	log ERROR "${@}"
-}
-
-info() {
-	log INFO "${@}"
-}
-
-fatal() {
-	log FATAL "${@}"
-	echo "DISABLE"
-	exit 1
-}
-
-debug() {
-	[ $debug -eq 1 ] && log DEBUG "${@}"
-}
-
-# -----------------------------------------------------------------------------
-# check a few commands
-
-require_cmd() {
-	local x=$(which "${1}" 2>/dev/null || command -v "${1}" 2>/dev/null)
-	if [ -z "${x}" -o ! -x "${x}" ]; then
-		warning "command '${1}' is not found in ${PATH}."
-		eval "${1^^}_CMD=\"\""
-		return 1
-	fi
-
-	eval "${1^^}_CMD=\"${x}\""
-	return 0
-}
-
-require_cmd date || exit 1
-require_cmd sed || exit 1
-require_cmd basename || exit 1
-require_cmd dirname || exit 1
-require_cmd cat || exit 1
-require_cmd grep || exit 1
-require_cmd egrep || exit 1
-require_cmd mktemp || exit 1
-require_cmd awk || exit 1
-require_cmd timeout || exit 1
-require_cmd curl || exit 1
-
-# -----------------------------------------------------------------------------
-
-[ $((BASH_VERSINFO[0])) -lt 4 ] && fatal "BASH version 4 or later is required, but found version: ${BASH_VERSION}. Please upgrade."
-
-info "started from '$PROGRAM_FILE' with options: $*"
-
-# -----------------------------------------------------------------------------
-# internal defaults
-# netdata exposes a few environment variables for us
-
-[ -z "${NETDATA_PLUGINS_DIR}" ] && NETDATA_PLUGINS_DIR="$(dirname "${0}")"
-[ -z "${NETDATA_USER_CONFIG_DIR}" ] && NETDATA_USER_CONFIG_DIR="/etc/netdata"
-[ -z "${NETDATA_STOCK_CONFIG_DIR}" ] && NETDATA_STOCK_CONFIG_DIR="/usr/lib/netdata/conf.d"
-
-pluginsd="${NETDATA_PLUGINS_DIR}"
-stockconfd="${NETDATA_STOCK_CONFIG_DIR}/${PROGRAM_NAME}"
-userconfd="${NETDATA_USER_CONFIG_DIR}/${PROGRAM_NAME}"
-olduserconfd="${NETDATA_USER_CONFIG_DIR}"
-chartsd="$pluginsd/../charts.d"
-
-minimum_update_frequency="${NETDATA_UPDATE_EVERY-1}"
-update_every=${minimum_update_frequency} # this will be overwritten by the command line
-
-# work around for non BASH shells
-charts_create="_create"
-charts_update="_update"
-charts_check="_check"
-charts_undescore="_"
-
-# when making iterations, charts.d can loop more frequently
-# to prevent plugins missing iterations.
-# this is a percentage relative to update_every to align its
-# iterations.
-# The minimum is 10%, the maximum 100%.
-# So, if update_every is 1 second and time_divisor is 50,
-# charts.d will iterate every 500ms.
-# Charts will be called to collect data only if the time
-# passed since the last time the collected data is equal or
-# above their update_every.
-time_divisor=50
-
-# number of seconds to run without restart
-# after this time, charts.d.plugin will exit
-# netdata will restart it
-restart_timeout=$((3600 * 4))
-
-# check if the charts.d plugins are using global variables
-# they should not.
-# It does not currently support BASH v4 arrays, so it is
-# disabled
-dryrunner=0
-
-# check for timeout command
-check_for_timeout=1
-
-# the default enable/disable value for all charts
-enable_all_charts="yes"
-
-# -----------------------------------------------------------------------------
-# parse parameters
-
-check=0
-chart_only=
-while [ ! -z "$1" ]; do
-	if [ "$1" = "check" ]; then
-		check=1
-		shift
-		continue
-	fi
-
-	if [ "$1" = "debug" -o "$1" = "all" ]; then
-		debug=1
-		shift
-		continue
-	fi
-
-	if [ -f "$chartsd/$1.chart.sh" ]; then
-		debug=1
-		chart_only="$(echo $1.chart.sh | sed "s/\.chart\.sh$//g")"
-		shift
-		continue
-	fi
-
-	if [ -f "$chartsd/$1" ]; then
-		debug=1
-		chart_only="$(echo $1 | sed "s/\.chart\.sh$//g")"
-		shift
-		continue
-	fi
-
-	# number check
-	n="$1"
-	x=$((n))
-	if [ "$x" = "$n" ]; then
-		shift
-		update_every=$x
-		[ $update_every -lt $minimum_update_frequency ] && update_every=$minimum_update_frequency
-		continue
-	fi
-
-	fatal "Cannot understand parameter $1. Aborting."
-done
-
-# -----------------------------------------------------------------------------
-# loop control
-
-# default sleep function
-LOOPSLEEPMS_HIGHRES=0
-now_ms=
-current_time_ms_default() {
-	now_ms="$(date +'%s')000"
-}
-current_time_ms="current_time_ms_default"
-current_time_ms_accuracy=1
-mysleep="sleep"
-
-# if found and included, this file overwrites loopsleepms()
-# and current_time_ms() with a high resolution timer function
-# for precise looping.
-source "$pluginsd/loopsleepms.sh.inc"
-[ $? -ne 0 ] && error "Failed to load '$pluginsd/loopsleepms.sh.inc'."
-
-# -----------------------------------------------------------------------------
-# load my configuration
-
-for myconfig in "${NETDATA_STOCK_CONFIG_DIR}/${PROGRAM_NAME}.conf" "${NETDATA_USER_CONFIG_DIR}/${PROGRAM_NAME}.conf"; do
-	if [ -f "$myconfig" ]; then
-		source "$myconfig"
-		if [ $? -ne 0 ]; then
-			error "Config file '$myconfig' loaded with errors."
-		else
-			info "Configuration file '$myconfig' loaded."
-		fi
-	else
-		warning "Configuration file '$myconfig' not found."
-	fi
-done
-
-# make sure time_divisor is right
-time_divisor=$((time_divisor))
-[ $time_divisor -lt 10 ] && time_divisor=10
-[ $time_divisor -gt 100 ] && time_divisor=100
-
-# we check for the timeout command, after we load our
-# configuration, so that the user may overwrite the
-# timeout command we use, providing a function that
-# can emulate the timeout command we need:
-# > timeout SECONDS command ...
-if [ $check_for_timeout -eq 1 ]; then
-	require_cmd timeout || exit 1
-fi
-
-# -----------------------------------------------------------------------------
-# internal checks
-
-# netdata passes the requested update frequency as the first argument
-update_every=$((update_every + 1 - 1))     # makes sure it is a number
-test $update_every -eq 0 && update_every=1 # if it is zero, make it 1
-
-# check the charts.d directory
-[ ! -d "$chartsd" ] && fatal "cannot find charts directory '$chartsd'"
-
-# -----------------------------------------------------------------------------
-# library functions
-
-fixid() {
-	echo "$*" |
-		tr -c "[A-Z][a-z][0-9]" "_" |
-		sed -e "s|^_\+||g" -e "s|_\+$||g" -e "s|_\+|_|g" |
-		tr "[A-Z]" "[a-z]"
-}
-
-run() {
-	local ret pid="${BASHPID}" t
-
-	if [ "z${1}" = "z-t" -a "${2}" != "0" ]; then
-		t="${2}"
-		shift 2
-		case "${NETDATA_SYSTEM_OS_ID}" in
-		"alpine")
-			timeout -t ${t} "${@}" 2>"${TMP_DIR}/run.${pid}"
-			;;
-		*)
-			timeout ${t} "${@}" 2>"${TMP_DIR}/run.${pid}"
-			;;
-		esac
-		ret=$?
-	else
-		"${@}" 2>"${TMP_DIR}/run.${pid}"
-		ret=$?
-	fi
-
-	if [ ${ret} -ne 0 ]; then
-		{
-			printf "$(logdate): ${PROGRAM_NAME}: ${status}: ${MODULE_NAME}: command '"
-			printf "%q " "${@}"
-			printf "' failed with code ${ret}:\n --- BEGIN TRACE ---\n"
-			cat "${TMP_DIR}/run.${pid}"
-			printf " --- END TRACE ---\n"
-		} >&2
-	fi
-	rm -f "${TMP_DIR}/run.${pid}"
-
-	return ${ret}
-}
-
-# convert any floating point number
-# to integer, give a multiplier
-# the result is stored in ${FLOAT2INT_RESULT}
-# so that no fork is necessary
-# the multiplier must be a power of 10
-float2int() {
-	local f m="$2" a b l v=($1)
-	f=${v[0]}
-
-	# the length of the multiplier - 1
-	l=$((${#m} - 1))
-
-	# check if the number is in scientific notation
-	if [[ ${f} =~ ^[[:space:]]*(-)?[0-9.]+(e|E)(\+|-)[0-9]+ ]]; then
-		# convert it to decimal
-		# unfortunately, this fork cannot be avoided
-		# if you know of a way to avoid it, please let me know
-		f=$(printf "%0.${l}f" ${f})
-	fi
-
-	# split the floating point number
-	# in integer (a) and decimal (b)
-	a=${f/.*/}
-	b=${f/*./}
-
-	# if the integer part is missing
-	# set it to zero
-	[ -z "${a}" ] && a="0"
-
-	# strip leading zeros from the integer part
-	# base 10 convertion
-	a=$((10#$a))
-
-	# check the length of the decimal part
-	# against the length of the multiplier
-	if [ ${#b} -gt ${l} ]; then
-		# too many digits - take the most significant
-		b=${b:0:l}
-
-	elif [ ${#b} -lt ${l} ]; then
-		# too few digits - pad with zero on the right
-		local z="00000000000000000000000" r=$((l - ${#b}))
-		b="${b}${z:0:r}"
-	fi
-
-	# strip leading zeros from the decimal part
-	# base 10 convertion
-	b=$((10#$b))
-
-	# store the result
-	FLOAT2INT_RESULT=$(((a * m) + b))
-}
-
-# -----------------------------------------------------------------------------
-# charts check functions
-
-all_charts() {
-	cd "$chartsd"
-	[ $? -ne 0 ] && error "cannot cd to $chartsd" && return 1
-
-	ls *.chart.sh | sed "s/\.chart\.sh$//g"
-}
-
-declare -A charts_enable_keyword=(
-	['apache']="force"
-	['cpu_apps']="force"
-	['cpufreq']="force"
-	['example']="force"
-	['exim']="force"
-	['hddtemp']="force"
-	['load_average']="force"
-	['mem_apps']="force"
-	['mysql']="force"
-	['nginx']="force"
-	['phpfpm']="force"
-	['postfix']="force"
-	['sensors']="force"
-	['squid']="force"
-	['tomcat']="force"
-)
-
-all_enabled_charts() {
-	local charts= enabled= required=
-
-	# find all enabled charts
-
-	for chart in $(all_charts); do
-		MODULE_NAME="${chart}"
-
-		eval "enabled=\$$chart"
-		if [ -z "${enabled}" ]; then
-			enabled="${enable_all_charts}"
-		fi
-
-		required="${charts_enable_keyword[${chart}]}"
-		[ -z "${required}" ] && required="yes"
-
-		if [ ! "${enabled}" = "${required}" ]; then
-			info "is disabled. Add a line with $chart=$required in '${NETDATA_USER_CONFIG_DIR}/${PROGRAM_NAME}.conf' to enable it (or remove the line that disables it)."
-		else
-			debug "is enabled for auto-detection."
-			local charts="$charts $chart"
-		fi
-	done
-	MODULE_NAME="main"
-
-	local charts2=
-	for chart in $charts; do
-		MODULE_NAME="${chart}"
-
-		# check the enabled charts
-		local check="$(cat "$chartsd/$chart.chart.sh" | sed "s/^ \+//g" | grep "^$chart$charts_check()")"
-		if [ -z "$check" ]; then
-			error "module '$chart' does not seem to have a $chart$charts_check() function. Disabling it."
-			continue
-		fi
-
-		local create="$(cat "$chartsd/$chart.chart.sh" | sed "s/^ \+//g" | grep "^$chart$charts_create()")"
-		if [ -z "$create" ]; then
-			error "module '$chart' does not seem to have a $chart$charts_create() function. Disabling it."
-			continue
-		fi
-
-		local update="$(cat "$chartsd/$chart.chart.sh" | sed "s/^ \+//g" | grep "^$chart$charts_update()")"
-		if [ -z "$update" ]; then
-			error "module '$chart' does not seem to have a $chart$charts_update() function. Disabling it."
-			continue
-		fi
-
-		# check its config
-		#if [ -f "$userconfd/$chart.conf" ]
-		#then
-		#   if [ ! -z "$( cat "$userconfd/$chart.conf" | sed "s/^ \+//g" | grep -v "^$" | grep -v "^#" | grep -v "^$chart$charts_undescore" )" ]
-		#   then
-		#       error "module's $chart config $userconfd/$chart.conf should only have lines starting with $chart$charts_undescore . Disabling it."
-		#       continue
-		#   fi
-		#fi
-
-		#if [ $dryrunner -eq 1 ]
-		#   then
-		#   "$pluginsd/charts.d.dryrun-helper.sh" "$chart" "$chartsd/$chart.chart.sh" "$userconfd/$chart.conf" >/dev/null
-		#   if [ $? -ne 0 ]
-		#   then
-		#       error "module's $chart did not pass the dry run check. This means it uses global variables not starting with $chart. Disabling it."
-		#       continue
-		#   fi
-		#fi
-
-		local charts2="$charts2 $chart"
-	done
-	MODULE_NAME="main"
-
-	echo $charts2
-	debug "enabled charts: $charts2"
-}
-
-# -----------------------------------------------------------------------------
-# load the charts
-
-suffix_retries="_retries"
-suffix_update_every="_update_every"
-active_charts=
-for chart in $(all_enabled_charts); do
-	MODULE_NAME="${chart}"
-
-	debug "loading module: '$chartsd/$chart.chart.sh'"
-
-	source "$chartsd/$chart.chart.sh"
-	[ $? -ne 0 ] && warning "Module '$chartsd/$chart.chart.sh' loaded with errors."
-
-	# first load the stock config
-	if [ -f "$stockconfd/$chart.conf" ]; then
-		debug "loading module configuration: '$stockconfd/$chart.conf'"
-		source "$stockconfd/$chart.conf"
-		[ $? -ne 0 ] && warning "Config file '$stockconfd/$chart.conf' loaded with errors."
-	else
-		debug "not found module configuration: '$stockconfd/$chart.conf'"
-	fi
-
-	# then load the user config (it overwrites the stock)
-	if [ -f "$userconfd/$chart.conf" ]; then
-		debug "loading module configuration: '$userconfd/$chart.conf'"
-		source "$userconfd/$chart.conf"
-		[ $? -ne 0 ] && warning "Config file '$userconfd/$chart.conf' loaded with errors."
-	else
-		debug "not found module configuration: '$userconfd/$chart.conf'"
-
-		if [ -f "$olduserconfd/$chart.conf" ]; then
-			# support for very old netdata that had the charts.d module configs in /etc/netdata
-			info "loading module configuration from obsolete location: '$olduserconfd/$chart.conf'"
-			source "$olduserconfd/$chart.conf"
-			[ $? -ne 0 ] && warning "Config file '$olduserconfd/$chart.conf' loaded with errors."
-		fi
-	fi
-
-	eval "dt=\$$chart$suffix_update_every"
-	dt=$((dt + 1 - 1)) # make sure it is a number
-	if [ $dt -lt $update_every ]; then
-		eval "$chart$suffix_update_every=$update_every"
-	fi
-
-	$chart$charts_check
-	if [ $? -eq 0 ]; then
-		debug "module '$chart' activated"
-		active_charts="$active_charts $chart"
-	else
-		error "module's '$chart' check() function reports failure."
-	fi
-done
-MODULE_NAME="main"
-debug "activated modules: $active_charts"
-
-# -----------------------------------------------------------------------------
-# check overwrites
-
-# enable work time reporting
-debug_time=
-test $debug -eq 1 && debug_time=tellwork
-
-# if we only need a specific chart, remove all the others
-if [ ! -z "${chart_only}" ]; then
-	debug "requested to run only for: '${chart_only}'"
-	check_charts=
-	for chart in $active_charts; do
-		if [ "$chart" = "$chart_only" ]; then
-			check_charts="$chart"
-			break
-		fi
-	done
-	active_charts="$check_charts"
-fi
-debug "activated charts: $active_charts"
-
-# stop if we just need a pre-check
-if [ $check -eq 1 ]; then
-	info "CHECK RESULT"
-	info "Will run the charts: $active_charts"
-	exit 0
-fi
-
-# -----------------------------------------------------------------------------
-
-cd "${TMP_DIR}" || exit 1
-
-# -----------------------------------------------------------------------------
-# create charts
-
-run_charts=
-for chart in $active_charts; do
-	MODULE_NAME="${chart}"
-
-	debug "calling '$chart$charts_create()'..."
-	$chart$charts_create
-	if [ $? -eq 0 ]; then
-		run_charts="$run_charts $chart"
-		debug "'$chart' initialized."
-	else
-		error "module's '$chart' function '$chart$charts_create()' reports failure."
-	fi
-done
-MODULE_NAME="main"
-debug "run_charts='$run_charts'"
-
-# -----------------------------------------------------------------------------
-# update dimensions
-
-[ -z "$run_charts" ] && fatal "No charts to collect data from."
-
-declare -A charts_last_update=() charts_update_every=() charts_retries=() charts_next_update=() charts_run_counter=() charts_serial_failures=()
-global_update() {
-	local exit_at \
-		c=0 dt ret last_ms exec_start_ms exec_end_ms \
-		chart now_charts=() next_charts=($run_charts) \
-		next_ms x seconds millis
-
-	# return the current time in ms in $now_ms
-	${current_time_ms}
-
-	exit_at=$((now_ms + (restart_timeout * 1000)))
-
-	for chart in $run_charts; do
-		eval "charts_update_every[$chart]=\$$chart$suffix_update_every"
-		test -z "${charts_update_every[$chart]}" && charts_update_every[$chart]=$update_every
-
-		eval "charts_retries[$chart]=\$$chart$suffix_retries"
-		test -z "${charts_retries[$chart]}" && charts_retries[$chart]=10
-
-		charts_last_update[$chart]=$((now_ms - (now_ms % (charts_update_every[$chart] * 1000))))
-		charts_next_update[$chart]=$((charts_last_update[$chart] + (charts_update_every[$chart] * 1000)))
-		charts_run_counter[$chart]=0
-		charts_serial_failures[$chart]=0
-
-		echo "CHART netdata.plugin_chartsd_$chart '' 'Execution time for $chart plugin' 'milliseconds / run' charts.d netdata.plugin_charts area 145000 ${charts_update_every[$chart]}"
-		echo "DIMENSION run_time 'run time' absolute 1 1"
-	done
-
-	# the main loop
-	while [ "${#next_charts[@]}" -gt 0 ]; do
-		c=$((c + 1))
-		now_charts=("${next_charts[@]}")
-		next_charts=()
-
-		# return the current time in ms in $now_ms
-		${current_time_ms}
-
-		for chart in "${now_charts[@]}"; do
-			MODULE_NAME="${chart}"
-
-			if [ ${now_ms} -ge ${charts_next_update[$chart]} ]; then
-				last_ms=${charts_last_update[$chart]}
-				dt=$((now_ms - last_ms))
-
-				charts_last_update[$chart]=${now_ms}
-
-				while [ ${charts_next_update[$chart]} -lt ${now_ms} ]; do
-					charts_next_update[$chart]=$((charts_next_update[$chart] + (charts_update_every[$chart] * 1000)))
-				done
-
-				# the first call should not give a duration
-				# so that netdata calibrates to current time
-				dt=$((dt * 1000))
-				charts_run_counter[$chart]=$((charts_run_counter[$chart] + 1))
-				if [ ${charts_run_counter[$chart]} -eq 1 ]; then
-					dt=
-				fi
-
-				exec_start_ms=$now_ms
-				$chart$charts_update $dt
-				ret=$?
-
-				# return the current time in ms in $now_ms
-				${current_time_ms}
-				exec_end_ms=$now_ms
-
-				echo "BEGIN netdata.plugin_chartsd_$chart $dt"
-				echo "SET run_time = $((exec_end_ms - exec_start_ms))"
-				echo "END"
-
-				if [ $ret -eq 0 ]; then
-					charts_serial_failures[$chart]=0
-					next_charts+=($chart)
-				else
-					charts_serial_failures[$chart]=$((charts_serial_failures[$chart] + 1))
-
-					if [ ${charts_serial_failures[$chart]} -gt ${charts_retries[$chart]} ]; then
-						error "module's '$chart' update() function reported failure ${charts_serial_failures[$chart]} times. Disabling it."
-					else
-						error "module's '$chart' update() function reports failure. Will keep trying for a while."
-						next_charts+=($chart)
-					fi
-				fi
-			else
-				next_charts+=($chart)
-			fi
-		done
-		MODULE_NAME="${chart}"
-
-		# wait the time you are required to
-		next_ms=$((now_ms + (update_every * 1000 * 100)))
-		for x in "${charts_next_update[@]}"; do [ ${x} -lt ${next_ms} ] && next_ms=${x}; done
-		next_ms=$((next_ms - now_ms))
-
-		if [ ${LOOPSLEEPMS_HIGHRES} -eq 1 -a ${next_ms} -gt 0 ]; then
-			next_ms=$((next_ms + current_time_ms_accuracy))
-			seconds=$((next_ms / 1000))
-			millis=$((next_ms % 1000))
-			if [ ${millis} -lt 10 ]; then
-				millis="00${millis}"
-			elif [ ${millis} -lt 100 ]; then
-				millis="0${millis}"
-			fi
-
-			debug "sleeping for ${seconds}.${millis} seconds."
-			${mysleep} ${seconds}.${millis}
-		else
-			debug "sleeping for ${update_every} seconds."
-			${mysleep} $update_every
-		fi
-
-		test ${now_ms} -ge ${exit_at} && exit 0
-	done
-
-	fatal "nothing left to do, exiting..."
-}
-
-global_update
diff --git a/collectors/charts.d.plugin/charts.d.plugin.in b/collectors/charts.d.plugin/charts.d.plugin.in
index 0df6c30c3..62363f3db 100755
--- a/collectors/charts.d.plugin/charts.d.plugin.in
+++ b/collectors/charts.d.plugin/charts.d.plugin.in
@@ -275,20 +275,26 @@ fixid() {
 		tr "[A-Z]" "[a-z]"
 }
 
+isvarset() {
+  [ -n "$1" ] && [ "$1" != "unknown" ] && [ "$1" != "none" ]
+  return $?
+}
+
+getosid() {
+  if isvarset "${NETDATA_CONTAINER_OS_ID}"; then
+    echo "${NETDATA_CONTAINER_OS_ID}"
+  else
+    echo "${NETDATA_SYSTEM_OS_ID}"
+  fi
+}
+
 run() {
 	local ret pid="${BASHPID}" t
 
 	if [ "z${1}" = "z-t" -a "${2}" != "0" ]; then
 		t="${2}"
 		shift 2
-		case "${NETDATA_SYSTEM_OS_ID}" in
-		"alpine")
-			timeout -t ${t} "${@}" 2>"${TMP_DIR}/run.${pid}"
-			;;
-		*)
-			timeout ${t} "${@}" 2>"${TMP_DIR}/run.${pid}"
-			;;
-		esac
+		timeout "${t}" "${@}" 2>"${TMP_DIR}/run.${pid}"
 		ret=$?
 	else
 		"${@}" 2>"${TMP_DIR}/run.${pid}"
@@ -390,14 +396,34 @@ declare -A charts_enable_keyword=(
 	['tomcat']="force"
 )
 
+declare -A obsolete_charts=(
+	['apache']="python.d.plugin module"
+	['cpu_apps']="apps.plugin"
+	['cpufreq']="proc plugin"
+	['exim']="python.d.plugin module"
+	['hddtemp']="python.d.plugin module"
+	['load_average']="proc plugin"
+	['mem_apps']="proc plugin"
+	['mysql']="python.d.plugin module"
+	['nginx']="python.d.plugin module"
+	['phpfpm']="python.d.plugin module"
+	['postfix']="python.d.plugin module"
+	['squid']="python.d.plugin module"
+	['tomcat']="python.d.plugin module"
+)
+
 all_enabled_charts() {
-	local charts= enabled= required=
+	local charts enabled required
 
 	# find all enabled charts
-
 	for chart in $(all_charts); do
 		MODULE_NAME="${chart}"
 
+		if [ -n "${obsolete_charts["$MODULE_NAME"]}" ]; then
+		  debug "is replaced by ${obsolete_charts["$MODULE_NAME"]}, skipping it."
+		  continue
+		fi
+
 		eval "enabled=\$$chart"
 		if [ -z "${enabled}" ]; then
 			enabled="${enable_all_charts}"
@@ -578,6 +604,12 @@ debug "run_charts='$run_charts'"
 
 [ -z "$run_charts" ] && fatal "No charts to collect data from."
 
+keepalive() {
+  if [ ! -t 1 ] && ! printf "\n"; then
+    chartsd_cleanup
+  fi
+}
+
 declare -A charts_last_update=() charts_update_every=() charts_retries=() charts_next_update=() charts_run_counter=() charts_serial_failures=()
 global_update() {
 	local exit_at \
@@ -608,6 +640,8 @@ global_update() {
 
 	# the main loop
 	while [ "${#next_charts[@]}" -gt 0 ]; do
+	  keepalive
+
 		c=$((c + 1))
 		now_charts=("${next_charts[@]}")
 		next_charts=()
diff --git a/collectors/charts.d.plugin/cpu_apps/Makefile.inc b/collectors/charts.d.plugin/cpu_apps/Makefile.inc
deleted file mode 100644
index a35f82837..000000000
--- a/collectors/charts.d.plugin/cpu_apps/Makefile.inc
+++ /dev/null
@@ -1,13 +0,0 @@
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-# THIS IS NOT A COMPLETE Makefile
-# IT IS INCLUDED BY ITS PARENT'S Makefile.am
-# IT IS REQUIRED TO REFERENCE ALL FILES RELATIVE TO THE PARENT
-
-# install these files
-dist_charts_DATA       += cpu_apps/cpu_apps.chart.sh
-dist_chartsconfig_DATA += cpu_apps/cpu_apps.conf
-
-# do not install these files, but include them in the distribution
-dist_noinst_DATA       += cpu_apps/README.md cpu_apps/Makefile.inc
-
diff --git a/collectors/charts.d.plugin/cpu_apps/README.md b/collectors/charts.d.plugin/cpu_apps/README.md
deleted file mode 100644
index c8230aa4f..000000000
--- a/collectors/charts.d.plugin/cpu_apps/README.md
+++ /dev/null
@@ -1,6 +0,0 @@
-# cpu_apps
-
-> THIS MODULE IS OBSOLETE.
-> USE [APPS.PLUGIN](../../apps.plugin).
-
-[![analytics](https://www.google-analytics.com/collect?v=1&aip=1&t=pageview&_s=1&ds=github&dr=https%3A%2F%2Fgithub.com%2Fnetdata%2Fnetdata&dl=https%3A%2F%2Fmy-netdata.io%2Fgithub%2Fcollectors%2Fcharts.d.plugin%2Fcpu_apps%2FREADME&_u=MAC~&cid=5792dfd7-8dc4-476b-af31-da2fdb9f93d2&tid=UA-64295674-3)](<>)
diff --git a/collectors/charts.d.plugin/cpu_apps/cpu_apps.chart.sh b/collectors/charts.d.plugin/cpu_apps/cpu_apps.chart.sh
deleted file mode 100644
index e91c46d54..000000000
--- a/collectors/charts.d.plugin/cpu_apps/cpu_apps.chart.sh
+++ /dev/null
@@ -1,70 +0,0 @@
-# shellcheck shell=bash disable=SC2154,SC1072,SC1073,SC2009,SC2162,SC2006,SC2002,SC2086,SC1117
-# no need for shebang - this file is loaded from charts.d.plugin
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-# netdata
-# real-time performance and health monitoring, done right!
-# (C) 2016 Costa Tsaousis <costa@tsaousis.gr>
-#
-# THIS PLUGIN IS OBSOLETE
-# USE apps.plugin INSTEAD
-
-# a space separated list of command to monitor
-cpu_apps_apps=
-
-# these are required for computing memory in bytes and cpu in seconds
-#cpu_apps_pagesize="`getconf PAGESIZE`"
-cpu_apps_clockticks="$(getconf CLK_TCK)"
-
-cpu_apps_update_every=60
-
-cpu_apps_check() {
-	# this should return:
-	#  - 0 to enable the chart
-	#  - 1 to disable the chart
-
-	if [ -z "$cpu_apps_apps" ]; then
-		error "manual configuration required: please set cpu_apps_apps='command1 command2 ...' in $confd/cpu_apps_apps.conf"
-		return 1
-	fi
-	return 0
-}
-
-cpu_apps_bc_finalze=
-
-cpu_apps_create() {
-
-	echo "CHART chartsd_apps.cpu '' 'Apps CPU' 'milliseconds / $cpu_apps_update_every sec' apps apps stacked 20001 $cpu_apps_update_every"
-
-	local x=
-	for x in $cpu_apps_apps; do
-		echo "DIMENSION $x $x incremental 1000 $cpu_apps_clockticks"
-
-		# this string is needed later in the update() function
-		# to finalize the instructions for the bc command
-		cpu_apps_bc_finalze="$cpu_apps_bc_finalze \"SET $x = \"; $x;"
-	done
-	return 0
-}
-
-cpu_apps_update() {
-	# do all the work to collect / calculate the values
-	# for each dimension
-	# remember: KEEP IT SIMPLE AND SHORT
-
-	echo "BEGIN chartsd_apps.cpu"
-	ps -o pid,comm -C "$cpu_apps_apps" |
-		grep -v "COMMAND" |
-		(
-			while read pid name; do
-				echo "$name+=$(cat /proc/$pid/stat | cut -d ' ' -f 14-15)"
-			done
-		) |
-		(
-			sed -e "s/ \+/ /g" -e "s/ /+/g"
-			echo "$cpu_apps_bc_finalze"
-		) | bc
-	echo "END"
-
-	return 0
-}
diff --git a/collectors/charts.d.plugin/cpu_apps/cpu_apps.conf b/collectors/charts.d.plugin/cpu_apps/cpu_apps.conf
deleted file mode 100644
index 850cd0c6f..000000000
--- a/collectors/charts.d.plugin/cpu_apps/cpu_apps.conf
+++ /dev/null
@@ -1,19 +0,0 @@
-# no need for shebang - this file is loaded from charts.d.plugin
-
-# netdata
-# real-time performance and health monitoring, done right!
-# (C) 2018 Costa Tsaousis <costa@tsaousis.gr>
-# GPL v3+
-
-# THIS PLUGIN IS DEPRECATED
-# app.plugin can do better
-
-#cpu_apps_apps=
-
-# the data collection frequency
-# if unset, will inherit the netdata update frequency
-#cpu_apps_update_every=2
-
-# the number of retries to do in case of failure
-# before disabling the module
-#cpu_apps_retries=10
diff --git a/collectors/charts.d.plugin/cpufreq/Makefile.inc b/collectors/charts.d.plugin/cpufreq/Makefile.inc
deleted file mode 100644
index 682379133..000000000
--- a/collectors/charts.d.plugin/cpufreq/Makefile.inc
+++ /dev/null
@@ -1,13 +0,0 @@
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-# THIS IS NOT A COMPLETE Makefile
-# IT IS INCLUDED BY ITS PARENT'S Makefile.am
-# IT IS REQUIRED TO REFERENCE ALL FILES RELATIVE TO THE PARENT
-
-# install these files
-dist_charts_DATA       += cpufreq/cpufreq.chart.sh
-dist_chartsconfig_DATA += cpufreq/cpufreq.conf
-
-# do not install these files, but include them in the distribution
-dist_noinst_DATA       += cpufreq/README.md cpufreq/Makefile.inc
-
diff --git a/collectors/charts.d.plugin/cpufreq/README.md b/collectors/charts.d.plugin/cpufreq/README.md
deleted file mode 100644
index fc2bfca19..000000000
--- a/collectors/charts.d.plugin/cpufreq/README.md
+++ /dev/null
@@ -1,6 +0,0 @@
-# cpufreq
-
-> THIS MODULE IS OBSOLETE.
-> USE THE [PROC PLUGIN](../../proc.plugin) - IT SUPPORTS MULTIPLE JOBS AND IT IS MORE EFFICIENT
-
-[![analytics](https://www.google-analytics.com/collect?v=1&aip=1&t=pageview&_s=1&ds=github&dr=https%3A%2F%2Fgithub.com%2Fnetdata%2Fnetdata&dl=https%3A%2F%2Fmy-netdata.io%2Fgithub%2Fcollectors%2Fcharts.d.plugin%2Fcpufreq%2FREADME&_u=MAC~&cid=5792dfd7-8dc4-476b-af31-da2fdb9f93d2&tid=UA-64295674-3)](<>)
diff --git a/collectors/charts.d.plugin/cpufreq/cpufreq.chart.sh b/collectors/charts.d.plugin/cpufreq/cpufreq.chart.sh
deleted file mode 100644
index 68708d911..000000000
--- a/collectors/charts.d.plugin/cpufreq/cpufreq.chart.sh
+++ /dev/null
@@ -1,88 +0,0 @@
-# shellcheck shell=bash
-# no need for shebang - this file is loaded from charts.d.plugin
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-# netdata
-# real-time performance and health monitoring, done right!
-# (C) 2016 Costa Tsaousis <costa@tsaousis.gr>
-#
-
-# if this chart is called X.chart.sh, then all functions and global variables
-# must start with X_
-
-cpufreq_sys_dir="${NETDATA_HOST_PREFIX}/sys/devices"
-cpufreq_sys_depth=10
-cpufreq_source_update=1
-
-# _update_every is a special variable - it holds the number of seconds
-# between the calls of the _update() function
-cpufreq_update_every=
-cpufreq_priority=10000
-
-cpufreq_find_all_files() {
-	find "$1" -maxdepth $cpufreq_sys_depth -name scaling_cur_freq 2>/dev/null
-}
-
-# _check is called once, to find out if this chart should be enabled or not
-cpufreq_check() {
-
-	# this should return:
-	#  - 0 to enable the chart
-	#  - 1 to disable the chart
-
-	[ -z "$(cpufreq_find_all_files "$cpufreq_sys_dir")" ] && return 1
-	return 0
-}
-
-# _create is called once, to create the charts
-cpufreq_create() {
-	local dir file id i
-
-	# we create a script with the source of the
-	# cpufreq_update() function
-	# - the highest speed we can achieve -
-	[ $cpufreq_source_update -eq 1 ] && echo >"$TMP_DIR/cpufreq.sh" "cpufreq_update() {"
-
-	echo "CHART cpu.cpufreq '' 'CPU Clock' 'MHz' 'cpufreq' '' line $((cpufreq_priority + 1)) $cpufreq_update_every"
-	echo >>"$TMP_DIR/cpufreq.sh" "echo \"BEGIN cpu.cpufreq \$1\""
-
-	i=0
-	for file in $(cpufreq_find_all_files "$cpufreq_sys_dir" | sort -u); do
-		i=$((i + 1))
-		dir=$(dirname "$file")
-		cpu=
-
-		[ -f "$dir/affected_cpus" ] && cpu=$(cat "$dir/affected_cpus")
-		[ -z "$cpu" ] && cpu="$i.a"
-
-		id="$(fixid "cpu$cpu")"
-
-		debug "file='$file', dir='$dir', cpu='$cpu', id='$id'"
-
-		echo "DIMENSION $id '$id' absolute 1 1000"
-		echo >>"$TMP_DIR/cpufreq.sh" "echo \"SET $id = \"\$(< $file )"
-	done
-	echo >>"$TMP_DIR/cpufreq.sh" "echo END"
-
-	[ $cpufreq_source_update -eq 1 ] && echo >>"$TMP_DIR/cpufreq.sh" "}"
-
-	# ok, load the function cpufreq_update() we created
-	# shellcheck disable=SC1090
-	[ $cpufreq_source_update -eq 1 ] && . "$TMP_DIR/cpufreq.sh"
-
-	return 0
-}
-
-# _update is called continuously, to collect the values
-cpufreq_update() {
-	# the first argument to this function is the microseconds since last update
-	# pass this parameter to the BEGIN statement (see bellow).
-
-	# do all the work to collect / calculate the values
-	# for each dimension
-	# remember: KEEP IT SIMPLE AND SHORT
-	# shellcheck disable=SC1090
-	[ $cpufreq_source_update -eq 0 ] && . "$TMP_DIR/cpufreq.sh" "$1"
-
-	return 0
-}
diff --git a/collectors/charts.d.plugin/cpufreq/cpufreq.conf b/collectors/charts.d.plugin/cpufreq/cpufreq.conf
deleted file mode 100644
index 7130555af..000000000
--- a/collectors/charts.d.plugin/cpufreq/cpufreq.conf
+++ /dev/null
@@ -1,24 +0,0 @@
-# no need for shebang - this file is loaded from charts.d.plugin
-
-# netdata
-# real-time performance and health monitoring, done right!
-# (C) 2018 Costa Tsaousis <costa@tsaousis.gr>
-# GPL v3+
-
-# THIS PLUGIN IS DEPRECATED
-# USE THE PYTHON.D ONE
-
-#cpufreq_sys_dir="/sys/devices"
-#cpufreq_sys_depth=10
-#cpufreq_source_update=1
-
-# the data collection frequency
-# if unset, will inherit the netdata update frequency
-#cpufreq_update_every=
-
-# the charts priority on the dashboard
-#cpufreq_priority=10000
-
-# the number of retries to do in case of failure
-# before disabling the module
-#cpufreq_retries=10
diff --git a/collectors/charts.d.plugin/example/README.md b/collectors/charts.d.plugin/example/README.md
index 98562d624..de21f6ad6 100644
--- a/collectors/charts.d.plugin/example/README.md
+++ b/collectors/charts.d.plugin/example/README.md
@@ -1,3 +1,8 @@
+<!--
+title: "Example"
+custom_edit_url: https://github.com/netdata/netdata/edit/master/collectors/charts.d.plugin/example/README.md
+-->
+
 # Example
 
 This is just an example charts.d data collector.
diff --git a/collectors/charts.d.plugin/example/example.chart.sh b/collectors/charts.d.plugin/example/example.chart.sh
index 8bae570a3..5ff51a579 100644
--- a/collectors/charts.d.plugin/example/example.chart.sh
+++ b/collectors/charts.d.plugin/example/example.chart.sh
@@ -32,63 +32,63 @@ example_last=0
 example_count=0
 
 example_get() {
-	# do all the work to collect / calculate the values
-	# for each dimension
-	#
-	# Remember:
-	# 1. KEEP IT SIMPLE AND SHORT
-	# 2. AVOID FORKS (avoid piping commands)
-	# 3. AVOID CALLING TOO MANY EXTERNAL PROGRAMS
-	# 4. USE LOCAL VARIABLES (global variables may overlap with other modules)
-
-	example_value1=$RANDOM
-	example_value2=$RANDOM
-	example_value3=$RANDOM
-	example_value4=$((8192 + (RANDOM * 16383 / 32767)))
-
-	if [ $example_count -gt 0 ]; then
-		example_count=$((example_count - 1))
-
-		[ $example_last -gt 16383 ] && example_value4=$((example_last + (RANDOM * ((32767 - example_last) / 2) / 32767)))
-		[ $example_last -le 16383 ] && example_value4=$((example_last - (RANDOM * (example_last / 2) / 32767)))
-	else
-		example_count=$((1 + (RANDOM * 5 / 32767)))
-
-		if [ $example_last -gt 16383 ] && [ $example_value4 -gt 16383 ]; then
-			example_value4=$((example_value4 - 16383))
-		fi
-		if [ $example_last -le 16383 ] && [ $example_value4 -lt 16383 ]; then
-			example_value4=$((example_value4 + 16383))
-		fi
-	fi
-	example_last=$example_value4
-
-	# this should return:
-	#  - 0 to send the data to netdata
-	#  - 1 to report a failure to collect the data
-
-	return 0
+  # do all the work to collect / calculate the values
+  # for each dimension
+  #
+  # Remember:
+  # 1. KEEP IT SIMPLE AND SHORT
+  # 2. AVOID FORKS (avoid piping commands)
+  # 3. AVOID CALLING TOO MANY EXTERNAL PROGRAMS
+  # 4. USE LOCAL VARIABLES (global variables may overlap with other modules)
+
+  example_value1=$RANDOM
+  example_value2=$RANDOM
+  example_value3=$RANDOM
+  example_value4=$((8192 + (RANDOM * 16383 / 32767)))
+
+  if [ $example_count -gt 0 ]; then
+    example_count=$((example_count - 1))
+
+    [ $example_last -gt 16383 ] && example_value4=$((example_last + (RANDOM * ((32767 - example_last) / 2) / 32767)))
+    [ $example_last -le 16383 ] && example_value4=$((example_last - (RANDOM * (example_last / 2) / 32767)))
+  else
+    example_count=$((1 + (RANDOM * 5 / 32767)))
+
+    if [ $example_last -gt 16383 ] && [ $example_value4 -gt 16383 ]; then
+      example_value4=$((example_value4 - 16383))
+    fi
+    if [ $example_last -le 16383 ] && [ $example_value4 -lt 16383 ]; then
+      example_value4=$((example_value4 + 16383))
+    fi
+  fi
+  example_last=$example_value4
+
+  # this should return:
+  #  - 0 to send the data to netdata
+  #  - 1 to report a failure to collect the data
+
+  return 0
 }
 
 # _check is called once, to find out if this chart should be enabled or not
 example_check() {
-	# this should return:
-	#  - 0 to enable the chart
-	#  - 1 to disable the chart
+  # this should return:
+  #  - 0 to enable the chart
+  #  - 1 to disable the chart
 
-	# check something
-	[ "${example_magic_number}" != "12345" ] && error "manual configuration required: you have to set example_magic_number=$example_magic_number in example.conf to start example chart." && return 1
+  # check something
+  [ "${example_magic_number}" != "12345" ] && error "manual configuration required: you have to set example_magic_number=$example_magic_number in example.conf to start example chart." && return 1
 
-	# check that we can collect data
-	example_get || return 1
+  # check that we can collect data
+  example_get || return 1
 
-	return 0
+  return 0
 }
 
 # _create is called once, to create the charts
 example_create() {
-	# create the chart with 3 dimensions
-	cat <<EOF
+  # create the chart with 3 dimensions
+  cat << EOF
 CHART example.random '' "Random Numbers Stacked Chart" "% of random numbers" random random stacked $((example_priority)) $example_update_every
 DIMENSION random1 '' percentage-of-absolute-row 1 1
 DIMENSION random2 '' percentage-of-absolute-row 1 1
@@ -97,18 +97,18 @@ CHART example.random2 '' "A random number" "random number" random random area $(
 DIMENSION random '' absolute 1 1
 EOF
 
-	return 0
+  return 0
 }
 
 # _update is called continuously, to collect the values
 example_update() {
-	# the first argument to this function is the microseconds since last update
-	# pass this parameter to the BEGIN statement (see bellow).
+  # the first argument to this function is the microseconds since last update
+  # pass this parameter to the BEGIN statement (see bellow).
 
-	example_get || return 1
+  example_get || return 1
 
-	# write the result of the work.
-	cat <<VALUESEOF
+  # write the result of the work.
+  cat << VALUESEOF
 BEGIN example.random $1
 SET random1 = $example_value1
 SET random2 = $example_value2
@@ -119,5 +119,5 @@ SET random = $example_value4
 END
 VALUESEOF
 
-	return 0
+  return 0
 }
diff --git a/collectors/charts.d.plugin/exim/Makefile.inc b/collectors/charts.d.plugin/exim/Makefile.inc
deleted file mode 100644
index ca2112a80..000000000
--- a/collectors/charts.d.plugin/exim/Makefile.inc
+++ /dev/null
@@ -1,13 +0,0 @@
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-# THIS IS NOT A COMPLETE Makefile
-# IT IS INCLUDED BY ITS PARENT'S Makefile.am
-# IT IS REQUIRED TO REFERENCE ALL FILES RELATIVE TO THE PARENT
-
-# install these files
-dist_charts_DATA       += exim/exim.chart.sh
-dist_chartsconfig_DATA += exim/exim.conf
-
-# do not install these files, but include them in the distribution
-dist_noinst_DATA       += exim/README.md exim/Makefile.inc
-
diff --git a/collectors/charts.d.plugin/exim/README.md b/collectors/charts.d.plugin/exim/README.md
deleted file mode 100644
index 5c73c002e..000000000
--- a/collectors/charts.d.plugin/exim/README.md
+++ /dev/null
@@ -1,6 +0,0 @@
-# exim
-
-> THIS MODULE IS OBSOLETE.
-> USE [THE PYTHON ONE](../../python.d.plugin/exim) - IT SUPPORTS MULTIPLE JOBS AND IT IS MORE EFFICIENT
-
-[![analytics](https://www.google-analytics.com/collect?v=1&aip=1&t=pageview&_s=1&ds=github&dr=https%3A%2F%2Fgithub.com%2Fnetdata%2Fnetdata&dl=https%3A%2F%2Fmy-netdata.io%2Fgithub%2Fcollectors%2Fcharts.d.plugin%2Fexim%2FREADME&_u=MAC~&cid=5792dfd7-8dc4-476b-af31-da2fdb9f93d2&tid=UA-64295674-3)](<>)
diff --git a/collectors/charts.d.plugin/exim/exim.chart.sh b/collectors/charts.d.plugin/exim/exim.chart.sh
deleted file mode 100644
index 7b0ef70d2..000000000
--- a/collectors/charts.d.plugin/exim/exim.chart.sh
+++ /dev/null
@@ -1,46 +0,0 @@
-# shellcheck shell=bash
-# no need for shebang - this file is loaded from charts.d.plugin
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-# netdata
-# real-time performance and health monitoring, done right!
-# (C) 2016 Costa Tsaousis <costa@tsaousis.gr>
-#
-# Contributed by @jsveiga with PR #480
-
-# the exim command to run
-exim_command=
-
-# how frequently to collect queue size
-exim_update_every=5
-
-exim_priority=60000
-
-exim_check() {
-	if [ -z "${exim_command}" ]; then
-		require_cmd exim || return 1
-		exim_command="${EXIM_CMD}"
-	fi
-
-	if [ "$(${exim_command} -bpc 2>&1 | grep -c denied)" -ne 0 ]; then
-		error "permission denied - please set 'queue_list_requires_admin = false' in your exim options file"
-		return 1
-	fi
-
-	return 0
-}
-
-exim_create() {
-	cat <<EOF
-CHART exim_local.qemails '' "Exim Queue Emails" "emails" queue exim.queued.emails line $((exim_priority + 1)) $exim_update_every
-DIMENSION emails '' absolute 1 1
-EOF
-	return 0
-}
-
-exim_update() {
-	echo "BEGIN exim_local.qemails $1"
-	echo "SET emails = $(run "${exim_command}" -bpc)"
-	echo "END"
-	return 0
-}
diff --git a/collectors/charts.d.plugin/exim/exim.conf b/collectors/charts.d.plugin/exim/exim.conf
deleted file mode 100644
index f96ac4dbb..000000000
--- a/collectors/charts.d.plugin/exim/exim.conf
+++ /dev/null
@@ -1,24 +0,0 @@
-# no need for shebang - this file is loaded from charts.d.plugin
-
-# netdata
-# real-time performance and health monitoring, done right!
-# (C) 2018 Costa Tsaousis <costa@tsaousis.gr>
-# GPL v3+
-
-# THIS PLUGIN IS DEPRECATED
-# USE THE PYTHON.D ONE
-
-# the exim command to run
-# if empty, it will use the one found in the system path
-#exim_command=
-
-# the data collection frequency
-# if unset, will inherit the netdata update frequency
-#exim_update_every=5
-
-# the charts priority on the dashboard
-#exim_priority=60000
-
-# the number of retries to do in case of failure
-# before disabling the module
-#exim_retries=10
diff --git a/collectors/charts.d.plugin/hddtemp/Makefile.inc b/collectors/charts.d.plugin/hddtemp/Makefile.inc
deleted file mode 100644
index 2bd29e5b1..000000000
--- a/collectors/charts.d.plugin/hddtemp/Makefile.inc
+++ /dev/null
@@ -1,13 +0,0 @@
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-# THIS IS NOT A COMPLETE Makefile
-# IT IS INCLUDED BY ITS PARENT'S Makefile.am
-# IT IS REQUIRED TO REFERENCE ALL FILES RELATIVE TO THE PARENT
-
-# install these files
-dist_charts_DATA       += hddtemp/hddtemp.chart.sh
-dist_chartsconfig_DATA += hddtemp/hddtemp.conf
-
-# do not install these files, but include them in the distribution
-dist_noinst_DATA       += hddtemp/README.md hddtemp/Makefile.inc
-
diff --git a/collectors/charts.d.plugin/hddtemp/README.md b/collectors/charts.d.plugin/hddtemp/README.md
deleted file mode 100644
index 77f48956a..000000000
--- a/collectors/charts.d.plugin/hddtemp/README.md
+++ /dev/null
@@ -1,30 +0,0 @@
-# hddtemp
-
-> THIS MODULE IS OBSOLETE.
-> USE [THE PYTHON ONE](../../python.d.plugin/hddtemp) - IT SUPPORTS MULTIPLE JOBS AND IT IS MORE EFFICIENT
-
-The plugin will collect temperatures from disks 
-
-It will create one chart with all active disks
-
-1.  **temperature in Celsius**
-
-## configuration
-
-hddtemp needs to be running in daemonized mode
-
-```sh
-# host with daemonized hddtemp
-hddtemp_host="localhost"
-
-# port on which hddtemp is showing data
-hddtemp_port="7634"
-
-# array of included disks
-# the default is to include all
-hddtemp_disks=()
-```
-
----
-
-[![analytics](https://www.google-analytics.com/collect?v=1&aip=1&t=pageview&_s=1&ds=github&dr=https%3A%2F%2Fgithub.com%2Fnetdata%2Fnetdata&dl=https%3A%2F%2Fmy-netdata.io%2Fgithub%2Fcollectors%2Fcharts.d.plugin%2Fhddtemp%2FREADME&_u=MAC~&cid=5792dfd7-8dc4-476b-af31-da2fdb9f93d2&tid=UA-64295674-3)](<>)
diff --git a/collectors/charts.d.plugin/hddtemp/hddtemp.chart.sh b/collectors/charts.d.plugin/hddtemp/hddtemp.chart.sh
deleted file mode 100644
index a4cef3c3b..000000000
--- a/collectors/charts.d.plugin/hddtemp/hddtemp.chart.sh
+++ /dev/null
@@ -1,77 +0,0 @@
-# shellcheck shell=bash
-# no need for shebang - this file is loaded from charts.d.plugin
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-# netdata
-# real-time performance and health monitoring, done right!
-# (C) 2016 Costa Tsaousis <costa@tsaousis.gr>
-#
-# contributed by @paulfantom with PR #511
-
-# if this chart is called X.chart.sh, then all functions and global variables
-# must start with X_
-hddtemp_host="localhost"
-hddtemp_port="7634"
-declare -A hddtemp_disks=()
-
-# _update_every is a special variable - it holds the number of seconds
-# between the calls of the _update() function
-hddtemp_update_every=3
-hddtemp_priority=90000
-
-# _check is called once, to find out if this chart should be enabled or not
-hddtemp_check() {
-	require_cmd nc || return 1
-	run nc $hddtemp_host $hddtemp_port && return 0 || return 1
-}
-
-# _create is called once, to create the charts
-hddtemp_create() {
-	if [ ${#hddtemp_disks[@]} -eq 0 ]; then
-		local all
-		all=$(nc $hddtemp_host $hddtemp_port)
-		unset hddtemp_disks
-		# shellcheck disable=SC2190,SC2207
-		hddtemp_disks=($(grep -Po '/dev/[^|]+' <<<"$all" | cut -c 6-))
-	fi
-	#	local disk_names
-	#	disk_names=(`sed -e 's/||/\n/g;s/^|//' <<< "$all" | cut -d '|' -f2 | tr ' ' '_'`)
-
-	echo "CHART hddtemp.temperature 'disks_temp' 'temperature' 'Celsius' 'Disks temperature' 'hddtemp.temp' line $((hddtemp_priority)) $hddtemp_update_every"
-	for i in $(seq 0 $((${#hddtemp_disks[@]} - 1))); do
-		#		echo "DIMENSION ${hddtemp_disks[i]} ${disk_names[i]} absolute 1 1"
-		echo "DIMENSION ${hddtemp_disks[$i]} '' absolute 1 1"
-	done
-	return 0
-}
-
-# _update is called continuously, to collect the values
-#hddtemp_last=0
-#hddtemp_count=0
-hddtemp_update() {
-	#        local all=( `nc $hddtemp_host $hddtemp_port | sed -e 's/||/\n/g;s/^|//' | cut -d '|' -f3` )
-	#	local all=( `nc $hddtemp_host $hddtemp_port | awk 'BEGIN { FS="|" };{i=4; while (i <= NF) {print $i+0;i+=5;};}'` )
-	OLD_IFS=$IFS
-	set -f
-	# shellcheck disable=SC2207
-	IFS="|" all=($(nc $hddtemp_host $hddtemp_port 2>/dev/null))
-	set +f
-	IFS=$OLD_IFS
-
-	# check if there is some data
-	if [ -z "${all[3]}" ]; then
-		return 1
-	fi
-
-	# write the result of the work.
-	echo "BEGIN hddtemp.temperature $1"
-	end=${#hddtemp_disks[@]}
-	for ((i = 0; i < end; i++)); do
-		# temperature - this will turn SLP to zero
-		t=$((all[$((i * 5 + 3))]))
-		echo "SET ${hddtemp_disks[$i]} = $t"
-	done
-	echo "END"
-
-	return 0
-}
diff --git a/collectors/charts.d.plugin/hddtemp/hddtemp.conf b/collectors/charts.d.plugin/hddtemp/hddtemp.conf
deleted file mode 100644
index b6037b40e..000000000
--- a/collectors/charts.d.plugin/hddtemp/hddtemp.conf
+++ /dev/null
@@ -1,23 +0,0 @@
-# no need for shebang - this file is loaded from charts.d.plugin
-
-# netdata
-# real-time performance and health monitoring, done right!
-# (C) 2018 Costa Tsaousis <costa@tsaousis.gr>
-# GPL v3+
-
-# THIS PLUGIN IS DEPRECATED
-# USE THE PYTHON.D ONE
-
-#hddtemp_host="localhost"
-#hddtemp_port="7634"
-
-# the data collection frequency
-# if unset, will inherit the netdata update frequency
-#hddtemp_update_every=3
-
-# the charts priority on the dashboard
-#hddtemp_priority=90000
-
-# the number of retries to do in case of failure
-# before disabling the module
-#hddtemp_retries=10
diff --git a/collectors/charts.d.plugin/libreswan/README.md b/collectors/charts.d.plugin/libreswan/README.md
index d75c1ea96..b1c1f05e4 100644
--- a/collectors/charts.d.plugin/libreswan/README.md
+++ b/collectors/charts.d.plugin/libreswan/README.md
@@ -1,6 +1,12 @@
-# libreswan
+<!--
+title: "Libreswan IPSec tunnel monitoring with Netdata"
+custom_edit_url: https://github.com/netdata/netdata/edit/master/collectors/charts.d.plugin/libreswan/README.md
+sidebar_label: "Libreswan IPSec tunnels"
+-->
 
-The plugin will collects bytes-in, bytes-out and uptime for all established libreswan IPSEC tunnels.
+# Libreswan IPSec tunnel monitoring with Netdata
+
+Collects bytes-in, bytes-out and uptime for all established libreswan IPSEC tunnels.
 
 The following charts are created, **per tunnel**:
 
@@ -13,9 +19,15 @@ The following charts are created, **per tunnel**:
 -   bytes in
 -   bytes out
 
-## configuration
+## Configuration
+
+Edit the `charts.d/libreswan.conf` configuration file using `edit-config` from the Netdata [config
+directory](/docs/configure/nodes.md), which is typically at `/etc/netdata`.
 
-Its config file is `/etc/netdata/charts.d/libreswan.conf`.
+```bash
+cd /etc/netdata   # Replace this path with your Netdata config directory, if different
+sudo ./edit-config charts.d/libreswan.conf
+```
 
 The plugin executes 2 commands to collect all the information it needs:
 
diff --git a/collectors/charts.d.plugin/libreswan/libreswan.chart.sh b/collectors/charts.d.plugin/libreswan/libreswan.chart.sh
index 1a8f90b11..bfa2b9ea1 100644
--- a/collectors/charts.d.plugin/libreswan/libreswan.chart.sh
+++ b/collectors/charts.d.plugin/libreswan/libreswan.chart.sh
@@ -37,78 +37,93 @@ declare -A libreswan_established_add_time=()
 # we need this to avoid converting tunnel names to chart IDs on every iteration
 declare -A libreswan_tunnel_charts=()
 
+is_able_sudo_ipsec() {
+  if ! sudo -n -l "${IPSEC_CMD}" whack --status > /dev/null 2>&1; then
+    return 1
+  fi
+  if ! sudo -n -l "${IPSEC_CMD}" whack --trafficstatus > /dev/null 2>&1; then
+    return 1
+  fi
+  return 0
+}
+
 # run the ipsec command
 libreswan_ipsec() {
-	if [ ${libreswan_sudo} -ne 0 ]; then
-		sudo -n "${IPSEC_CMD}" "${@}"
-		return $?
-	else
-		"${IPSEC_CMD}" "${@}"
-		return $?
-	fi
+  if [ ${libreswan_sudo} -ne 0 ]; then
+    sudo -n "${IPSEC_CMD}" "${@}"
+    return $?
+  else
+    "${IPSEC_CMD}" "${@}"
+    return $?
+  fi
 }
 
 # fetch latest values - fill the arrays
 libreswan_get() {
-	# do all the work to collect / calculate the values
-	# for each dimension
-
-	# empty the variables
-	libreswan_traffic_in=()
-	libreswan_traffic_out=()
-	libreswan_established_add_time=()
-	libreswan_connected_tunnels=()
-
-	# convert the ipsec command output to a shell script
-	# and source it to get the values
-	# shellcheck disable=SC1090
-	source <(
-		{
-			libreswan_ipsec whack --status
-			libreswan_ipsec whack --trafficstatus
-		} | sed -n \
-			-e "s|[0-9]\+ #\([0-9]\+\): \"\(.*\)\".*IPsec SA established.*newest IPSEC.*|libreswan_connected_tunnels[\"\1\"]=\"\2\"|p" \
-			-e "s|[0-9]\+ #\([0-9]\+\): \"\(.*\)\",.* add_time=\([0-9]\+\),.* inBytes=\([0-9]\+\),.* outBytes=\([0-9]\+\).*|libreswan_traffic_in[\"\1\"]=\"\4\"; libreswan_traffic_out[\"\1\"]=\"\5\"; libreswan_established_add_time[\"\1\"]=\"\3\";|p"
-	) || return 1
-
-	# check we got some data
-	[ ${#libreswan_connected_tunnels[@]} -eq 0 ] && return 1
-
-	return 0
+  # do all the work to collect / calculate the values
+  # for each dimension
+
+  # empty the variables
+  libreswan_traffic_in=()
+  libreswan_traffic_out=()
+  libreswan_established_add_time=()
+  libreswan_connected_tunnels=()
+
+  # convert the ipsec command output to a shell script
+  # and source it to get the values
+  # shellcheck disable=SC1090
+  source <(
+    {
+      libreswan_ipsec whack --status
+      libreswan_ipsec whack --trafficstatus
+    } | sed -n \
+      -e "s|[0-9]\+ #\([0-9]\+\): \"\(.*\)\".*IPsec SA established.*newest IPSEC.*|libreswan_connected_tunnels[\"\1\"]=\"\2\"|p" \
+      -e "s|[0-9]\+ #\([0-9]\+\): \"\(.*\)\",\{0,1\}.* add_time=\([0-9]\+\),.* inBytes=\([0-9]\+\),.* outBytes=\([0-9]\+\).*|libreswan_traffic_in[\"\1\"]=\"\4\"; libreswan_traffic_out[\"\1\"]=\"\5\"; libreswan_established_add_time[\"\1\"]=\"\3\";|p"
+  ) || return 1
+
+  # check we got some data
+  [ ${#libreswan_connected_tunnels[@]} -eq 0 ] && return 1
+
+  return 0
 }
 
 # _check is called once, to find out if this chart should be enabled or not
 libreswan_check() {
-	# this should return:
-	#  - 0 to enable the chart
-	#  - 1 to disable the chart
+  # this should return:
+  #  - 0 to enable the chart
+  #  - 1 to disable the chart
+
+  require_cmd ipsec || return 1
 
-	require_cmd ipsec || return 1
+  # make sure it is libreswan
+  # shellcheck disable=SC2143
+  if [ -z "$(ipsec --version | grep -i libreswan)" ]; then
+    error "ipsec command is not Libreswan. Disabling Libreswan plugin."
+    return 1
+  fi
 
-	# make sure it is libreswan
-	# shellcheck disable=SC2143
-	if [ -z "$(ipsec --version | grep -i libreswan)" ]; then
-		error "ipsec command is not Libreswan. Disabling Libreswan plugin."
-		return 1
-	fi
+  if [ ${libreswan_sudo} -ne 0 ] && ! is_able_sudo_ipsec; then
+    error "not enough permissions to execute ipsec with sudo. Disabling Libreswan plugin."
+    return 1
+  fi
 
-	# check that we can collect data
-	libreswan_get || return 1
+  # check that we can collect data
+  libreswan_get || return 1
 
-	return 0
+  return 0
 }
 
 # create the charts for an ipsec tunnel
 libreswan_create_one() {
-	local n="${1}" name
+  local n="${1}" name
 
-	name="${libreswan_connected_tunnels[${n}]}"
+  name="${libreswan_connected_tunnels[${n}]}"
 
-	[ ! -z "${libreswan_tunnel_charts[${name}]}" ] && return 0
+  [ -n "${libreswan_tunnel_charts[${name}]}" ] && return 0
 
-	libreswan_tunnel_charts[${name}]="$(fixid "${name}")"
+  libreswan_tunnel_charts[${name}]="$(fixid "${name}")"
 
-	cat <<EOF
+  cat << EOF
 CHART libreswan.${libreswan_tunnel_charts[${name}]}_net '${name}_net' "LibreSWAN Tunnel ${name} Traffic" "kilobits/s" "${name}" libreswan.net area $((libreswan_priority)) $libreswan_update_every
 DIMENSION in '' incremental 8 1000
 DIMENSION out '' incremental -8 1000
@@ -116,35 +131,35 @@ CHART libreswan.${libreswan_tunnel_charts[${name}]}_uptime '${name}_uptime' "Lib
 DIMENSION uptime '' absolute 1 1
 EOF
 
-	return 0
+  return 0
 
 }
 
 # _create is called once, to create the charts
 libreswan_create() {
-	local n
-	for n in "${!libreswan_connected_tunnels[@]}"; do
-		libreswan_create_one "${n}"
-	done
-	return 0
+  local n
+  for n in "${!libreswan_connected_tunnels[@]}"; do
+    libreswan_create_one "${n}"
+  done
+  return 0
 }
 
 libreswan_now=$(date +%s)
 
 # send the values to netdata for an ipsec tunnel
 libreswan_update_one() {
-	local n="${1}" microseconds="${2}" name id uptime
+  local n="${1}" microseconds="${2}" name id uptime
 
-	name="${libreswan_connected_tunnels[${n}]}"
-	id="${libreswan_tunnel_charts[${name}]}"
+  name="${libreswan_connected_tunnels[${n}]}"
+  id="${libreswan_tunnel_charts[${name}]}"
 
-	[ -z "${id}" ] && libreswan_create_one "${name}"
+  [ -z "${id}" ] && libreswan_create_one "${name}"
 
-	uptime=$((libreswan_now - libreswan_established_add_time[${n}]))
-	[ ${uptime} -lt 0 ] && uptime=0
+  uptime=$((libreswan_now - libreswan_established_add_time[${n}]))
+  [ ${uptime} -lt 0 ] && uptime=0
 
-	# write the result of the work.
-	cat <<VALUESEOF
+  # write the result of the work.
+  cat << VALUESEOF
 BEGIN libreswan.${id}_net ${microseconds}
 SET in = ${libreswan_traffic_in[${n}]}
 SET out = ${libreswan_traffic_out[${n}]}
@@ -157,16 +172,16 @@ VALUESEOF
 
 # _update is called continiously, to collect the values
 libreswan_update() {
-	# the first argument to this function is the microseconds since last update
-	# pass this parameter to the BEGIN statement (see bellow).
+  # the first argument to this function is the microseconds since last update
+  # pass this parameter to the BEGIN statement (see bellow).
 
-	libreswan_get || return 1
-	libreswan_now=$(date +%s)
+  libreswan_get || return 1
+  libreswan_now=$(date +%s)
 
-	local n
-	for n in "${!libreswan_connected_tunnels[@]}"; do
-		libreswan_update_one "${n}" "${@}"
-	done
+  local n
+  for n in "${!libreswan_connected_tunnels[@]}"; do
+    libreswan_update_one "${n}" "${@}"
+  done
 
-	return 0
+  return 0
 }
diff --git a/collectors/charts.d.plugin/load_average/Makefile.inc b/collectors/charts.d.plugin/load_average/Makefile.inc
deleted file mode 100644
index e5a481bf4..000000000
--- a/collectors/charts.d.plugin/load_average/Makefile.inc
+++ /dev/null
@@ -1,13 +0,0 @@
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-# THIS IS NOT A COMPLETE Makefile
-# IT IS INCLUDED BY ITS PARENT'S Makefile.am
-# IT IS REQUIRED TO REFERENCE ALL FILES RELATIVE TO THE PARENT
-
-# install these files
-dist_charts_DATA       += load_average/load_average.chart.sh
-dist_chartsconfig_DATA += load_average/load_average.conf
-
-# do not install these files, but include them in the distribution
-dist_noinst_DATA       += load_average/README.md load_average/Makefile.inc
-
diff --git a/collectors/charts.d.plugin/load_average/README.md b/collectors/charts.d.plugin/load_average/README.md
deleted file mode 100644
index 40b860cc5..000000000
--- a/collectors/charts.d.plugin/load_average/README.md
+++ /dev/null
@@ -1,6 +0,0 @@
-# load_average
-
-> THIS MODULE IS OBSOLETE.
-> THE NETDATA DAEMON COLLECTS LOAD AVERAGE BY ITSELF
-
-[![analytics](https://www.google-analytics.com/collect?v=1&aip=1&t=pageview&_s=1&ds=github&dr=https%3A%2F%2Fgithub.com%2Fnetdata%2Fnetdata&dl=https%3A%2F%2Fmy-netdata.io%2Fgithub%2Fcollectors%2Fcharts.d.plugin%2Fload_average%2FREADME&_u=MAC~&cid=5792dfd7-8dc4-476b-af31-da2fdb9f93d2&tid=UA-64295674-3)](<>)
diff --git a/collectors/charts.d.plugin/load_average/load_average.chart.sh b/collectors/charts.d.plugin/load_average/load_average.chart.sh
deleted file mode 100644
index 841e3d9f6..000000000
--- a/collectors/charts.d.plugin/load_average/load_average.chart.sh
+++ /dev/null
@@ -1,69 +0,0 @@
-# shellcheck shell=bash disable=SC2154,SC1072,SC1073,SC2009,SC2162,SC2006,SC2002,SC2086,SC1117
-# no need for shebang - this file is loaded from charts.d.plugin
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-# netdata
-# real-time performance and health monitoring, done right!
-# (C) 2016 Costa Tsaousis <costa@tsaousis.gr>
-#
-
-load_average_update_every=5
-load_priority=100
-
-# this is an example charts.d collector
-# it is disabled by default.
-# there is no point to enable it, since netdata already
-# collects this information using its internal plugins.
-load_average_enabled=0
-
-load_average_check() {
-	# this should return:
-	#  - 0 to enable the chart
-	#  - 1 to disable the chart
-
-	if [ ${load_average_update_every} -lt 5 ]; then
-		# there is no meaning for shorter than 5 seconds
-		# the kernel changes this value every 5 seconds
-		load_average_update_every=5
-	fi
-
-	[ ${load_average_enabled} -eq 0 ] && return 1
-	return 0
-}
-
-load_average_create() {
-	# create a chart with 3 dimensions
-	cat <<EOF
-CHART system.load '' "System Load Average" "load" load system.load line $((load_priority + 1)) $load_average_update_every
-DIMENSION load1 '1 min' absolute 1 100
-DIMENSION load5 '5 mins' absolute 1 100
-DIMENSION load15 '15 mins' absolute 1 100
-EOF
-
-	return 0
-}
-
-load_average_update() {
-	# do all the work to collect / calculate the values
-	# for each dimension
-	# remember: KEEP IT SIMPLE AND SHORT
-
-	# here we parse the system average load
-	# it is decimal (with 2 decimal digits), so we remove the dot and
-	# at the definition we have divisor = 100, to have the graph show the right value
-	loadavg="$(cat /proc/loadavg | sed -e "s/\.//g")"
-	load1=$(echo $loadavg | cut -d ' ' -f 1)
-	load5=$(echo $loadavg | cut -d ' ' -f 2)
-	load15=$(echo $loadavg | cut -d ' ' -f 3)
-
-	# write the result of the work.
-	cat <<VALUESEOF
-BEGIN system.load
-SET load1 = $load1
-SET load5 = $load5
-SET load15 = $load15
-END
-VALUESEOF
-
-	return 0
-}
diff --git a/collectors/charts.d.plugin/load_average/load_average.conf b/collectors/charts.d.plugin/load_average/load_average.conf
deleted file mode 100644
index 68979275f..000000000
--- a/collectors/charts.d.plugin/load_average/load_average.conf
+++ /dev/null
@@ -1,22 +0,0 @@
-# no need for shebang - this file is loaded from charts.d.plugin
-
-# netdata
-# real-time performance and health monitoring, done right!
-# (C) 2018 Costa Tsaousis <costa@tsaousis.gr>
-# GPL v3+
-
-# THIS PLUGIN IS DEPRECATED
-# netdata can collect this metric already
-
-#load_average_enabled=0
-
-# the data collection frequency
-# if unset, will inherit the netdata update frequency
-#load_average_update_every=5
-
-# the charts priority on the dashboard
-#load_average_priority=100
-
-# the number of retries to do in case of failure
-# before disabling the module
-#load_average_retries=10
diff --git a/collectors/charts.d.plugin/loopsleepms.sh.inc b/collectors/charts.d.plugin/loopsleepms.sh.inc
index e44eff689..c386083fb 100644
--- a/collectors/charts.d.plugin/loopsleepms.sh.inc
+++ b/collectors/charts.d.plugin/loopsleepms.sh.inc
@@ -10,16 +10,24 @@ fi
 # -----------------------------------------------------------------------------
 # use the date command as a high resolution timer
 
+# macOS 'date' doesnt support '%N' precision
+# echo $(/bin/date +"%N") is "N"
+if [ "$($LOOPSLEEP_DATE +"%N")" = "N" ]; then
+  LOOPSLEEP_DATE_FORMAT="%s * 1000"
+else
+  LOOPSLEEP_DATE_FORMAT="%s * 1000 + 10#%-N / 1000000"
+fi
+
 now_ms=
 LOOPSLEEPMS_HIGHRES=1
 test "$($LOOPSLEEP_DATE +%N)" = "%N" && LOOPSLEEPMS_HIGHRES=0
 test -z "$($LOOPSLEEP_DATE +%N)" && LOOPSLEEPMS_HIGHRES=0
 current_time_ms_from_date() {
-	if [ $LOOPSLEEPMS_HIGHRES -eq 0 ]; then
-		now_ms="$($LOOPSLEEP_DATE +'%s')000"
-	else
-		now_ms="$(($($LOOPSLEEP_DATE +'%s * 1000 + %-N / 1000000')))"
-	fi
+  if [ $LOOPSLEEPMS_HIGHRES -eq 0 ]; then
+    now_ms="$($LOOPSLEEP_DATE +'%s')000"
+  else
+    now_ms="$(($($LOOPSLEEP_DATE +"$LOOPSLEEP_DATE_FORMAT")))"
+  fi
 }
 
 # -----------------------------------------------------------------------------
diff --git a/collectors/charts.d.plugin/mem_apps/Makefile.inc b/collectors/charts.d.plugin/mem_apps/Makefile.inc
deleted file mode 100644
index ea546fb69..000000000
--- a/collectors/charts.d.plugin/mem_apps/Makefile.inc
+++ /dev/null
@@ -1,13 +0,0 @@
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-# THIS IS NOT A COMPLETE Makefile
-# IT IS INCLUDED BY ITS PARENT'S Makefile.am
-# IT IS REQUIRED TO REFERENCE ALL FILES RELATIVE TO THE PARENT
-
-# install these files
-dist_charts_DATA       += mem_apps/mem_apps.chart.sh
-dist_chartsconfig_DATA += mem_apps/mem_apps.conf
-
-# do not install these files, but include them in the distribution
-dist_noinst_DATA       += mem_apps/README.md mem_apps/Makefile.inc
-
diff --git a/collectors/charts.d.plugin/mem_apps/README.md b/collectors/charts.d.plugin/mem_apps/README.md
deleted file mode 100644
index 93d33832a..000000000
--- a/collectors/charts.d.plugin/mem_apps/README.md
+++ /dev/null
@@ -1,6 +0,0 @@
-# mem_apps
-
-> THIS MODULE IS OBSOLETE.
-> USE [APPS.PLUGIN](../../apps.plugin).
-
-[![analytics](https://www.google-analytics.com/collect?v=1&aip=1&t=pageview&_s=1&ds=github&dr=https%3A%2F%2Fgithub.com%2Fnetdata%2Fnetdata&dl=https%3A%2F%2Fmy-netdata.io%2Fgithub%2Fcollectors%2Fcharts.d.plugin%2Fmem_apps%2FREADME&_u=MAC~&cid=5792dfd7-8dc4-476b-af31-da2fdb9f93d2&tid=UA-64295674-3)](<>)
diff --git a/collectors/charts.d.plugin/mem_apps/mem_apps.chart.sh b/collectors/charts.d.plugin/mem_apps/mem_apps.chart.sh
deleted file mode 100644
index b9b84a467..000000000
--- a/collectors/charts.d.plugin/mem_apps/mem_apps.chart.sh
+++ /dev/null
@@ -1,62 +0,0 @@
-# shellcheck shell=bash disable=SC2154,SC1072,SC1073,SC2009,SC2162,SC2006,SC2002,SC2086,SC1117
-# no need for shebang - this file is loaded from charts.d.plugin
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-# netdata
-# real-time performance and health monitoring, done right!
-# (C) 2016 Costa Tsaousis <costa@tsaousis.gr>
-#
-
-mem_apps_apps=
-
-# these are required for computing memory in bytes and cpu in seconds
-#mem_apps_pagesize="`getconf PAGESIZE`"
-#mem_apps_clockticks="`getconf CLK_TCK`"
-
-mem_apps_update_every=
-
-mem_apps_check() {
-	# this should return:
-	#  - 0 to enable the chart
-	#  - 1 to disable the chart
-
-	if [ -z "$mem_apps_apps" ]; then
-		error "manual configuration required: please set mem_apps_apps='command1 command2 ...' in $confd/mem_apps_apps.conf"
-		return 1
-	fi
-	return 0
-}
-
-mem_apps_bc_finalze=
-
-mem_apps_create() {
-
-	echo "CHART chartsd_apps.mem '' 'Apps Memory' MB apps apps.mem stacked 20000 $mem_apps_update_every"
-
-	local x=
-	for x in $mem_apps_apps; do
-		echo "DIMENSION $x $x absolute 1 1024"
-
-		# this string is needed later in the update() function
-		# to finalize the instructions for the bc command
-		mem_apps_bc_finalze="$mem_apps_bc_finalze \"SET $x = \"; $x;"
-	done
-	return 0
-}
-
-mem_apps_update() {
-	# do all the work to collect / calculate the values
-	# for each dimension
-	# remember: KEEP IT SIMPLE AND SHORT
-
-	echo "BEGIN chartsd_apps.mem"
-	ps -o comm,rss -C "$mem_apps_apps" |
-		grep -v "^COMMAND" |
-		(
-			sed -e "s/ \+/ /g" -e "s/ /+=/g"
-			echo "$mem_apps_bc_finalze"
-		) | bc
-	echo "END"
-
-	return 0
-}
diff --git a/collectors/charts.d.plugin/mem_apps/mem_apps.conf b/collectors/charts.d.plugin/mem_apps/mem_apps.conf
deleted file mode 100644
index 75d24dc3e..000000000
--- a/collectors/charts.d.plugin/mem_apps/mem_apps.conf
+++ /dev/null
@@ -1,19 +0,0 @@
-# no need for shebang - this file is loaded from charts.d.plugin
-
-# netdata
-# real-time performance and health monitoring, done right!
-# (C) 2018 Costa Tsaousis <costa@tsaousis.gr>
-# GPL v3+
-
-# THIS PLUGIN IS DEPRECATED
-# app.plugin can do better
-
-#mem_apps_apps=
-
-# the data collection frequency
-# if unset, will inherit the netdata update frequency
-#mem_apps_update_every=2
-
-# the number of retries to do in case of failure
-# before disabling the module
-#mem_apps_retries=10
diff --git a/collectors/charts.d.plugin/mysql/Makefile.inc b/collectors/charts.d.plugin/mysql/Makefile.inc
deleted file mode 100644
index ca02fd078..000000000
--- a/collectors/charts.d.plugin/mysql/Makefile.inc
+++ /dev/null
@@ -1,13 +0,0 @@
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-# THIS IS NOT A COMPLETE Makefile
-# IT IS INCLUDED BY ITS PARENT'S Makefile.am
-# IT IS REQUIRED TO REFERENCE ALL FILES RELATIVE TO THE PARENT
-
-# install these files
-dist_charts_DATA       += mysql/mysql.chart.sh
-dist_chartsconfig_DATA += mysql/mysql.conf
-
-# do not install these files, but include them in the distribution
-dist_noinst_DATA       += mysql/README.md mysql/Makefile.inc
-
diff --git a/collectors/charts.d.plugin/mysql/README.md b/collectors/charts.d.plugin/mysql/README.md
deleted file mode 100644
index 2e8d72a43..000000000
--- a/collectors/charts.d.plugin/mysql/README.md
+++ /dev/null
@@ -1,88 +0,0 @@
-# mysql
-
-> THIS MODULE IS OBSOLETE.
-> USE [THE PYTHON ONE](../../python.d.plugin/mysql) - IT SUPPORTS MULTIPLE JOBS AND IT IS MORE EFFICIENT
-
-The plugin will monitor one or more mysql servers
-
-It will produce the following charts:
-
-1.  **Bandwidth** in kbps
-
--   in
--   out
-
-2.  **Queries** in queries/sec
-
--   queries
--   questions
--   slow queries
-
-3.  **Operations** in operations/sec
-
--   opened tables
--   flush
--   commit
--   delete
--   prepare
--   read first
--   read key
--   read next
--   read prev
--   read random
--   read random next
--   rollback
--   save point
--   update
--   write
-
-4.  **Table Locks** in locks/sec
-
--   immediate
--   waited
-
-5.  **Select Issues** in issues/sec
-
--   full join
--   full range join
--   range
--   range check
--   scan
-
-6.  **Sort Issues** in issues/sec
-
--   merge passes
--   range
--   scan
-
-## configuration
-
-You can configure many database servers, like this:
-
-You can provide, per server, the following:
-
-1.  a name, anything you like, but keep it short
-2.  the mysql command to connect to the server
-3.  the mysql command line options to be used for connecting to the server
-
-Here is an example for 2 servers:
-
-```sh
-mysql_opts[server1]="-h server1.example.com"
-mysql_opts[server2]="-h server2.example.com --connect_timeout 2"
-```
-
-The above will use the `mysql` command found in the system path.
-You can also provide a custom mysql command per server, like this:
-
-```sh
-mysql_cmds[server2]="/opt/mysql/bin/mysql"
-```
-
-The above sets the mysql command only for server2. server1 will use the system default.
-
-If no configuration is given, the plugin will attempt to connect to mysql server at localhost.
-
----
-
-[![analytics](https://www.google-analytics.com/collect?v=1&aip=1&t=pageview&_s=1&ds=github&dr=https%3A%2F%2Fgithub.com%2Fnetdata%2Fnetdata&dl=https%3A%2F%2Fmy-netdata.io%2Fgithub%2Fcollectors%2Fcharts.d.plugin%2Fmysql%2FREADME&_u=MAC~&cid=5792dfd7-8dc4-476b-af31-da2fdb9f93d2&tid=UA-64295674-3)](<>)
diff --git a/collectors/charts.d.plugin/mysql/mysql.chart.sh b/collectors/charts.d.plugin/mysql/mysql.chart.sh
deleted file mode 100644
index e1207dc9a..000000000
--- a/collectors/charts.d.plugin/mysql/mysql.chart.sh
+++ /dev/null
@@ -1,511 +0,0 @@
-# shellcheck shell=bash
-# no need for shebang - this file is loaded from charts.d.plugin
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-# netdata
-# real-time performance and health monitoring, done right!
-# (C) 2016 Costa Tsaousis <costa@tsaousis.gr>
-#
-
-# http://dev.mysql.com/doc/refman/5.0/en/server-status-variables.html
-#
-# https://dev.mysql.com/doc/refman/5.1/en/show-status.html
-# SHOW STATUS provides server status information (see Section 5.1.6, “Server Status Variables”).
-# This statement does not require any privilege.
-# It requires only the ability to connect to the server.
-
-mysql_update_every=2
-mysql_priority=60000
-
-declare -A mysql_cmds=() mysql_opts=() mysql_ids=() mysql_data=()
-
-mysql_get() {
-	local arr
-	local oIFS="${IFS}"
-	mysql_data=()
-	IFS=$'\t'$'\n'
-	#arr=($(run "${@}" -e "SHOW GLOBAL STATUS WHERE value REGEXP '^[0-9]';" | egrep "^(Bytes|Slow_|Que|Handl|Table|Selec|Sort_|Creat|Conne|Abort|Binlo|Threa|Innod|Qcach|Key_|Open)" ))
-	#arr=($(run "${@}" -N -e "SHOW GLOBAL STATUS;" | egrep "^(Bytes|Slow_|Que|Handl|Table|Selec|Sort_|Creat|Conne|Abort|Binlo|Threa|Innod|Qcach|Key_|Open)[^ ]+\s[0-9]" ))
-	# shellcheck disable=SC2207
-	arr=($(run "${@}" -N -e "SHOW GLOBAL STATUS;" | grep -E "^(Bytes|Slow_|Que|Handl|Table|Selec|Sort_|Creat|Conne|Abort|Binlo|Threa|Innod|Qcach|Key_|Open)[^[:space:]]+[[:space:]]+[0-9]+"))
-	IFS="${oIFS}"
-
-	[ "${#arr[@]}" -lt 3 ] && return 1
-	local end=${#arr[@]}
-	for ((i = 2; i < end; i += 2)); do
-		mysql_data["${arr[$i]}"]=${arr[i + 1]}
-	done
-
-	[ -z "${mysql_data[Connections]}" ] && return 1
-
-	mysql_data[Thread_cache_misses]=0
-	[ $((mysql_data[Connections] + 1 - 1)) -gt 0 ] && mysql_data[Thread_cache_misses]=$((mysql_data[Threads_created] * 10000 / mysql_data[Connections]))
-
-	return 0
-}
-
-mysql_check() {
-	# this should return:
-	#  - 0 to enable the chart
-	#  - 1 to disable the chart
-
-	local x m mysql_cmd tryroot=0 unconfigured=0
-
-	if [ "${1}" = "tryroot" ]; then
-		tryroot=1
-		shift
-	fi
-
-	# shellcheck disable=SC2230
-	[ -z "${mysql_cmd}" ] && mysql_cmd="$(which mysql 2>/dev/null || command -v mysql 2>/dev/null)"
-
-	if [ ${#mysql_opts[@]} -eq 0 ]; then
-		unconfigured=1
-
-		mysql_cmds[local]="$mysql_cmd"
-
-		if [ $tryroot -eq 1 ]; then
-			# the user has not configured us for mysql access
-			# if the root user is passwordless in mysql, we can
-			# attempt to connect to mysql as root
-			mysql_opts[local]="-u root"
-		else
-			mysql_opts[local]=
-		fi
-	fi
-
-	# check once if the url works
-	for m in "${!mysql_opts[@]}"; do
-		[ -z "${mysql_cmds[$m]}" ] && mysql_cmds[$m]="$mysql_cmd"
-		if [ -z "${mysql_cmds[$m]}" ]; then
-			# shellcheck disable=SC2154
-			error "cannot get mysql command for '${m}'. Please set mysql_cmds[$m]='/path/to/mysql', in $confd/mysql.conf"
-		fi
-
-		mysql_get "${mysql_cmds[$m]}" ${mysql_opts[$m]}
-		# shellcheck disable=SC2181
-		if [ ! $? -eq 0 ]; then
-			error "cannot get global status for '$m'. Please set mysql_opts[$m]='options' to whatever needed to get connected to the mysql server, in $confd/mysql.conf"
-			unset "mysql_cmds[$m]"
-			unset "mysql_opts[$m]"
-			unset "mysql_ids[$m]"
-			continue
-		fi
-
-		mysql_ids[$m]="$(fixid "$m")"
-	done
-
-	if [ ${#mysql_opts[@]} -eq 0 ]; then
-		if [ ${unconfigured} -eq 1 ] && [ ${tryroot} -eq 0 ]; then
-			mysql_check tryroot "${@}"
-			return $?
-		else
-			error "no mysql servers found. Please set mysql_opts[name]='options' to whatever needed to get connected to the mysql server, in $confd/mysql.conf"
-			return 1
-		fi
-	fi
-
-	return 0
-}
-
-mysql_create() {
-	local x
-
-	# create the charts
-	for x in "${mysql_ids[@]}"; do
-		cat <<EOF
-CHART mysql_$x.net '' "mysql Bandwidth" "kilobits/s" bandwidth mysql.net area $((mysql_priority + 1)) $mysql_update_every
-DIMENSION Bytes_received in incremental 8 1024
-DIMENSION Bytes_sent out incremental -8 1024
-
-CHART mysql_$x.queries '' "mysql Queries" "queries/s" queries mysql.queries line $((mysql_priority + 2)) $mysql_update_every
-DIMENSION Queries queries incremental 1 1
-DIMENSION Questions questions incremental 1 1
-DIMENSION Slow_queries slow_queries incremental -1 1
-
-CHART mysql_$x.handlers '' "mysql Handlers" "handlers/s" handlers mysql.handlers line $((mysql_priority + 3)) $mysql_update_every
-DIMENSION Handler_commit commit incremental 1 1
-DIMENSION Handler_delete delete incremental 1 1
-DIMENSION Handler_prepare prepare incremental 1 1
-DIMENSION Handler_read_first read_first incremental 1 1
-DIMENSION Handler_read_key read_key incremental 1 1
-DIMENSION Handler_read_next read_next incremental 1 1
-DIMENSION Handler_read_prev read_prev incremental 1 1
-DIMENSION Handler_read_rnd read_rnd incremental 1 1
-DIMENSION Handler_read_rnd_next read_rnd_next incremental 1 1
-DIMENSION Handler_rollback rollback incremental 1 1
-DIMENSION Handler_savepoint savepoint incremental 1 1
-DIMENSION Handler_savepoint_rollback savepoint_rollback incremental 1 1
-DIMENSION Handler_update update incremental 1 1
-DIMENSION Handler_write write incremental 1 1
-
-CHART mysql_$x.table_locks '' "mysql Tables Locks" "locks/s" locks mysql.table_locks line $((mysql_priority + 4)) $mysql_update_every
-DIMENSION Table_locks_immediate immediate incremental 1 1
-DIMENSION Table_locks_waited waited incremental -1 1
-
-CHART mysql_$x.join_issues '' "mysql Select Join Issues" "joins/s" issues mysql.join_issues line $((mysql_priority + 5)) $mysql_update_every
-DIMENSION Select_full_join full_join incremental 1 1
-DIMENSION Select_full_range_join full_range_join incremental 1 1
-DIMENSION Select_range range incremental 1 1
-DIMENSION Select_range_check range_check incremental 1 1
-DIMENSION Select_scan scan incremental 1 1
-
-CHART mysql_$x.sort_issues '' "mysql Sort Issues" "issues/s" issues mysql.sort.issues line $((mysql_priority + 6)) $mysql_update_every
-DIMENSION Sort_merge_passes merge_passes incremental 1 1
-DIMENSION Sort_range range incremental 1 1
-DIMENSION Sort_scan scan incremental 1 1
-
-CHART mysql_$x.tmp '' "mysql Tmp Operations" "counter" temporaries mysql.tmp line $((mysql_priority + 7)) $mysql_update_every
-DIMENSION Created_tmp_disk_tables disk_tables incremental 1 1
-DIMENSION Created_tmp_files files incremental 1 1
-DIMENSION Created_tmp_tables tables incremental 1 1
-
-CHART mysql_$x.connections '' "mysql Connections" "connections/s" connections mysql.connections line $((mysql_priority + 8)) $mysql_update_every
-DIMENSION Connections all incremental 1 1
-DIMENSION Aborted_connects aborded incremental 1 1
-
-CHART mysql_$x.binlog_cache '' "mysql Binlog Cache" "transactions/s" binlog mysql.binlog_cache line $((mysql_priority + 9)) $mysql_update_every
-DIMENSION Binlog_cache_disk_use disk incremental 1 1
-DIMENSION Binlog_cache_use all incremental 1 1
-
-CHART mysql_$x.threads '' "mysql Threads" "threads" threads mysql.threads line $((mysql_priority + 10)) $mysql_update_every
-DIMENSION Threads_connected connected absolute 1 1
-DIMENSION Threads_created created incremental 1 1
-DIMENSION Threads_cached cached absolute -1 1
-DIMENSION Threads_running running absolute 1 1
-
-CHART mysql_$x.thread_cache_misses '' "mysql Threads Cache Misses" "misses" threads mysql.thread_cache_misses area $((mysql_priority + 11)) $mysql_update_every
-DIMENSION misses misses absolute 1 100
-
-CHART mysql_$x.innodb_io '' "mysql InnoDB I/O Bandwidth" "kilobytes/s" innodb mysql.innodb_io area $((mysql_priority + 12)) $mysql_update_every
-DIMENSION Innodb_data_read read incremental 1 1024
-DIMENSION Innodb_data_written write incremental -1 1024
-
-CHART mysql_$x.innodb_io_ops '' "mysql InnoDB I/O Operations" "operations/s" innodb mysql.innodb_io_ops line $((mysql_priority + 13)) $mysql_update_every
-DIMENSION Innodb_data_reads reads incremental 1 1
-DIMENSION Innodb_data_writes writes incremental -1 1
-DIMENSION Innodb_data_fsyncs fsyncs incremental 1 1
-
-CHART mysql_$x.innodb_io_pending_ops '' "mysql InnoDB Pending I/O Operations" "operations" innodb mysql.innodb_io_pending_ops line $((mysql_priority + 14)) $mysql_update_every
-DIMENSION Innodb_data_pending_reads reads absolute 1 1
-DIMENSION Innodb_data_pending_writes writes absolute -1 1
-DIMENSION Innodb_data_pending_fsyncs fsyncs absolute 1 1
-
-CHART mysql_$x.innodb_log '' "mysql InnoDB Log Operations" "operations/s" innodb mysql.innodb_log line $((mysql_priority + 15)) $mysql_update_every
-DIMENSION Innodb_log_waits waits incremental 1 1
-DIMENSION Innodb_log_write_requests write_requests incremental -1 1
-DIMENSION Innodb_log_writes writes incremental -1 1
-
-CHART mysql_$x.innodb_os_log '' "mysql InnoDB OS Log Operations" "operations" innodb mysql.innodb_os_log line $((mysql_priority + 16)) $mysql_update_every
-DIMENSION Innodb_os_log_fsyncs fsyncs incremental 1 1
-DIMENSION Innodb_os_log_pending_fsyncs pending_fsyncs absolute 1 1
-DIMENSION Innodb_os_log_pending_writes pending_writes absolute -1 1
-
-CHART mysql_$x.innodb_os_log_io '' "mysql InnoDB OS Log Bandwidth" "kilobytes/s" innodb mysql.innodb_os_log_io area $((mysql_priority + 17)) $mysql_update_every
-DIMENSION Innodb_os_log_written write incremental -1 1024
-
-CHART mysql_$x.innodb_cur_row_lock '' "mysql InnoDB Current Row Locks" "operations" innodb mysql.innodb_cur_row_lock area $((mysql_priority + 18)) $mysql_update_every
-DIMENSION Innodb_row_lock_current_waits current_waits absolute 1 1
-
-CHART mysql_$x.innodb_rows '' "mysql InnoDB Row Operations" "operations/s" innodb mysql.innodb_rows area $((mysql_priority + 19)) $mysql_update_every
-DIMENSION Innodb_rows_read read incremental 1 1
-DIMENSION Innodb_rows_deleted deleted incremental -1 1
-DIMENSION Innodb_rows_inserted inserted incremental 1 1
-DIMENSION Innodb_rows_updated updated incremental -1 1
-
-CHART mysql_$x.innodb_buffer_pool_pages '' "mysql InnoDB Buffer Pool Pages" "pages" innodb mysql.innodb_buffer_pool_pages line $((mysql_priority + 20)) $mysql_update_every
-DIMENSION Innodb_buffer_pool_pages_data data absolute 1 1
-DIMENSION Innodb_buffer_pool_pages_dirty dirty absolute -1 1
-DIMENSION Innodb_buffer_pool_pages_free free absolute 1 1
-DIMENSION Innodb_buffer_pool_pages_flushed flushed incremental -1 1
-DIMENSION Innodb_buffer_pool_pages_misc misc absolute -1 1
-DIMENSION Innodb_buffer_pool_pages_total total absolute 1 1
-
-CHART mysql_$x.innodb_buffer_pool_bytes '' "mysql InnoDB Buffer Pool Bytes" "MiB" innodb mysql.innodb_buffer_pool_bytes area $((mysql_priority + 21)) $mysql_update_every
-DIMENSION Innodb_buffer_pool_bytes_data data absolute 1 $((1024 * 1024))
-DIMENSION Innodb_buffer_pool_bytes_dirty dirty absolute -1 $((1024 * 1024))
-
-CHART mysql_$x.innodb_buffer_pool_read_ahead '' "mysql InnoDB Buffer Pool Read Ahead" "operations/s" innodb mysql.innodb_buffer_pool_read_ahead area $((mysql_priority + 22)) $mysql_update_every
-DIMENSION Innodb_buffer_pool_read_ahead all incremental 1 1
-DIMENSION Innodb_buffer_pool_read_ahead_evicted evicted incremental -1 1
-DIMENSION Innodb_buffer_pool_read_ahead_rnd random incremental 1 1
-
-CHART mysql_$x.innodb_buffer_pool_reqs '' "mysql InnoDB Buffer Pool Requests" "requests/s" innodb mysql.innodb_buffer_pool_reqs area $((mysql_priority + 23)) $mysql_update_every
-DIMENSION Innodb_buffer_pool_read_requests reads incremental 1 1
-DIMENSION Innodb_buffer_pool_write_requests writes incremental -1 1
-
-CHART mysql_$x.innodb_buffer_pool_ops '' "mysql InnoDB Buffer Pool Operations" "operations/s" innodb mysql.innodb_buffer_pool_ops area $((mysql_priority + 24)) $mysql_update_every
-DIMENSION Innodb_buffer_pool_reads 'disk reads' incremental 1 1
-DIMENSION Innodb_buffer_pool_wait_free 'wait free' incremental -1 1
-
-CHART mysql_$x.qcache_ops '' "mysql QCache Operations" "queries/s" qcache mysql.qcache_ops line $((mysql_priority + 25)) $mysql_update_every
-DIMENSION Qcache_hits hits incremental 1 1
-DIMENSION Qcache_lowmem_prunes 'lowmem prunes' incremental -1 1
-DIMENSION Qcache_inserts inserts incremental 1 1
-DIMENSION Qcache_not_cached 'not cached' incremental -1 1
-
-CHART mysql_$x.qcache '' "mysql QCache Queries in Cache" "queries" qcache mysql.qcache line $((mysql_priority + 26)) $mysql_update_every
-DIMENSION Qcache_queries_in_cache queries absolute 1 1
-
-CHART mysql_$x.qcache_freemem '' "mysql QCache Free Memory" "MiB" qcache mysql.qcache_freemem area $((mysql_priority + 27)) $mysql_update_every
-DIMENSION Qcache_free_memory free absolute 1 $((1024 * 1024))
-
-CHART mysql_$x.qcache_memblocks '' "mysql QCache Memory Blocks" "blocks" qcache mysql.qcache_memblocks line $((mysql_priority + 28)) $mysql_update_every
-DIMENSION Qcache_free_blocks free absolute 1 1
-DIMENSION Qcache_total_blocks total absolute 1 1
-
-CHART mysql_$x.key_blocks '' "mysql MyISAM Key Cache Blocks" "blocks" myisam mysql.key_blocks line $((mysql_priority + 29)) $mysql_update_every
-DIMENSION Key_blocks_unused unused absolute 1 1
-DIMENSION Key_blocks_used used absolute -1 1
-DIMENSION Key_blocks_not_flushed 'not flushed' absolute 1 1
-
-CHART mysql_$x.key_requests '' "mysql MyISAM Key Cache Requests" "requests/s" myisam mysql.key_requests area $((mysql_priority + 30)) $mysql_update_every
-DIMENSION Key_read_requests reads incremental 1 1
-DIMENSION Key_write_requests writes incremental -1 1
-
-CHART mysql_$x.key_disk_ops '' "mysql MyISAM Key Cache Disk Operations" "operations/s" myisam mysql.key_disk_ops area $((mysql_priority + 31)) $mysql_update_every
-DIMENSION Key_reads reads incremental 1 1
-DIMENSION Key_writes writes incremental -1 1
-
-CHART mysql_$x.files '' "mysql Open Files" "files" files mysql.files line $((mysql_priority + 32)) $mysql_update_every
-DIMENSION Open_files files absolute 1 1
-
-CHART mysql_$x.files_rate '' "mysql Opened Files Rate" "files/s" files mysql.files_rate line $((mysql_priority + 33)) $mysql_update_every
-DIMENSION Opened_files files incremental 1 1
-EOF
-
-		if [ ! -z "${mysql_data[Binlog_stmt_cache_disk_use]}" ]; then
-			cat <<EOF
-CHART mysql_$x.binlog_stmt_cache '' "mysql Binlog Statement Cache" "statements/s" binlog mysql.binlog_stmt_cache line $((mysql_priority + 50)) $mysql_update_every
-DIMENSION Binlog_stmt_cache_disk_use disk incremental 1 1
-DIMENSION Binlog_stmt_cache_use all incremental 1 1
-EOF
-		fi
-
-		if [ ! -z "${mysql_data[Connection_errors_accept]}" ]; then
-			cat <<EOF
-CHART mysql_$x.connection_errors '' "mysql Connection Errors" "connections/s" connections mysql.connection_errors line $((mysql_priority + 51)) $mysql_update_every
-DIMENSION Connection_errors_accept accept incremental 1 1
-DIMENSION Connection_errors_internal internal incremental 1 1
-DIMENSION Connection_errors_max_connections max incremental 1 1
-DIMENSION Connection_errors_peer_addr peer_addr incremental 1 1
-DIMENSION Connection_errors_select select incremental 1 1
-DIMENSION Connection_errors_tcpwrap tcpwrap incremental 1 1
-EOF
-		fi
-
-	done
-	return 0
-}
-
-mysql_update() {
-	# the first argument to this function is the microseconds since last update
-	# pass this parameter to the BEGIN statement (see bellow).
-
-	# do all the work to collect / calculate the values
-	# for each dimension
-	# remember: KEEP IT SIMPLE AND SHORT
-
-	local m x
-	for m in "${!mysql_ids[@]}"; do
-		x="${mysql_ids[$m]}"
-		mysql_get "${mysql_cmds[$m]}" ${mysql_opts[$m]}
-
-		# shellcheck disable=SC2181
-		if [ $? -ne 0 ]; then
-			unset "mysql_ids[$m]"
-			unset "mysql_opts[$m]"
-			unset "mysql_cmds[$m]"
-			error "failed to get values for '${m}', disabling it."
-			continue
-		fi
-
-		# write the result of the work.
-		cat <<VALUESEOF
-BEGIN mysql_$x.net $1
-SET Bytes_received = ${mysql_data[Bytes_received]}
-SET Bytes_sent = ${mysql_data[Bytes_sent]}
-END
-BEGIN mysql_$x.queries $1
-SET Queries = ${mysql_data[Queries]}
-SET Questions = ${mysql_data[Questions]}
-SET Slow_queries = ${mysql_data[Slow_queries]}
-END
-BEGIN mysql_$x.handlers $1
-SET Handler_commit = ${mysql_data[Handler_commit]}
-SET Handler_delete = ${mysql_data[Handler_delete]}
-SET Handler_prepare = ${mysql_data[Handler_prepare]}
-SET Handler_read_first = ${mysql_data[Handler_read_first]}
-SET Handler_read_key = ${mysql_data[Handler_read_key]}
-SET Handler_read_next = ${mysql_data[Handler_read_next]}
-SET Handler_read_prev = ${mysql_data[Handler_read_prev]}
-SET Handler_read_rnd = ${mysql_data[Handler_read_rnd]}
-SET Handler_read_rnd_next = ${mysql_data[Handler_read_rnd_next]}
-SET Handler_rollback = ${mysql_data[Handler_rollback]}
-SET Handler_savepoint = ${mysql_data[Handler_savepoint]}
-SET Handler_savepoint_rollback = ${mysql_data[Handler_savepoint_rollback]}
-SET Handler_update = ${mysql_data[Handler_update]}
-SET Handler_write = ${mysql_data[Handler_write]}
-END
-BEGIN mysql_$x.table_locks $1
-SET Table_locks_immediate = ${mysql_data[Table_locks_immediate]}
-SET Table_locks_waited = ${mysql_data[Table_locks_waited]}
-END
-BEGIN mysql_$x.join_issues $1
-SET Select_full_join = ${mysql_data[Select_full_join]}
-SET Select_full_range_join = ${mysql_data[Select_full_range_join]}
-SET Select_range = ${mysql_data[Select_range]}
-SET Select_range_check = ${mysql_data[Select_range_check]}
-SET Select_scan = ${mysql_data[Select_scan]}
-END
-BEGIN mysql_$x.sort_issues $1
-SET Sort_merge_passes = ${mysql_data[Sort_merge_passes]}
-SET Sort_range = ${mysql_data[Sort_range]}
-SET Sort_scan = ${mysql_data[Sort_scan]}
-END
-BEGIN mysql_$x.tmp $1
-SET Created_tmp_disk_tables = ${mysql_data[Created_tmp_disk_tables]}
-SET Created_tmp_files = ${mysql_data[Created_tmp_files]}
-SET Created_tmp_tables = ${mysql_data[Created_tmp_tables]}
-END
-BEGIN mysql_$x.connections $1
-SET Connections = ${mysql_data[Connections]}
-SET Aborted_connects = ${mysql_data[Aborted_connects]}
-END
-BEGIN mysql_$x.binlog_cache $1
-SET Binlog_cache_disk_use = ${mysql_data[Binlog_cache_disk_use]}
-SET Binlog_cache_use = ${mysql_data[Binlog_cache_use]}
-END
-BEGIN mysql_$x.threads $1
-SET Threads_connected = ${mysql_data[Threads_connected]}
-SET Threads_created = ${mysql_data[Threads_created]}
-SET Threads_cached = ${mysql_data[Threads_cached]}
-SET Threads_running = ${mysql_data[Threads_running]}
-END
-BEGIN mysql_$x.thread_cache_misses $1
-SET misses = ${mysql_data[Thread_cache_misses]}
-END
-BEGIN mysql_$x.innodb_io $1
-SET Innodb_data_read = ${mysql_data[Innodb_data_read]}
-SET Innodb_data_written = ${mysql_data[Innodb_data_written]}
-END
-BEGIN mysql_$x.innodb_io_ops $1
-SET Innodb_data_reads = ${mysql_data[Innodb_data_reads]}
-SET Innodb_data_writes = ${mysql_data[Innodb_data_writes]}
-SET Innodb_data_fsyncs = ${mysql_data[Innodb_data_fsyncs]}
-END
-BEGIN mysql_$x.innodb_io_pending_ops $1
-SET Innodb_data_pending_reads = ${mysql_data[Innodb_data_pending_reads]}
-SET Innodb_data_pending_writes = ${mysql_data[Innodb_data_pending_writes]}
-SET Innodb_data_pending_fsyncs = ${mysql_data[Innodb_data_pending_fsyncs]}
-END
-BEGIN mysql_$x.innodb_log $1
-SET Innodb_log_waits = ${mysql_data[Innodb_log_waits]}
-SET Innodb_log_write_requests = ${mysql_data[Innodb_log_write_requests]}
-SET Innodb_log_writes = ${mysql_data[Innodb_log_writes]}
-END
-BEGIN mysql_$x.innodb_os_log $1
-SET Innodb_os_log_fsyncs = ${mysql_data[Innodb_os_log_fsyncs]}
-SET Innodb_os_log_pending_fsyncs = ${mysql_data[Innodb_os_log_pending_fsyncs]}
-SET Innodb_os_log_pending_writes = ${mysql_data[Innodb_os_log_pending_writes]}
-END
-BEGIN mysql_$x.innodb_os_log_io $1
-SET Innodb_os_log_written = ${mysql_data[Innodb_os_log_written]}
-END
-BEGIN mysql_$x.innodb_cur_row_lock $1
-SET Innodb_row_lock_current_waits = ${mysql_data[Innodb_row_lock_current_waits]}
-END
-BEGIN mysql_$x.innodb_rows $1
-SET Innodb_rows_inserted = ${mysql_data[Innodb_rows_inserted]}
-SET Innodb_rows_read = ${mysql_data[Innodb_rows_read]}
-SET Innodb_rows_updated = ${mysql_data[Innodb_rows_updated]}
-SET Innodb_rows_deleted = ${mysql_data[Innodb_rows_deleted]}
-END
-BEGIN mysql_$x.innodb_buffer_pool_pages $1
-SET Innodb_buffer_pool_pages_data = ${mysql_data[Innodb_buffer_pool_pages_data]}
-SET Innodb_buffer_pool_pages_dirty = ${mysql_data[Innodb_buffer_pool_pages_dirty]}
-SET Innodb_buffer_pool_pages_free = ${mysql_data[Innodb_buffer_pool_pages_free]}
-SET Innodb_buffer_pool_pages_flushed = ${mysql_data[Innodb_buffer_pool_pages_flushed]}
-SET Innodb_buffer_pool_pages_misc = ${mysql_data[Innodb_buffer_pool_pages_misc]}
-SET Innodb_buffer_pool_pages_total = ${mysql_data[Innodb_buffer_pool_pages_total]}
-END
-BEGIN mysql_$x.innodb_buffer_pool_bytes $1
-SET Innodb_buffer_pool_bytes_data = ${mysql_data[Innodb_buffer_pool_bytes_data]}
-SET Innodb_buffer_pool_bytes_dirty = ${mysql_data[Innodb_buffer_pool_bytes_dirty]}
-END
-BEGIN mysql_$x.innodb_buffer_pool_read_ahead $1
-SET Innodb_buffer_pool_read_ahead = ${mysql_data[Innodb_buffer_pool_read_ahead]}
-SET Innodb_buffer_pool_read_ahead_evicted = ${mysql_data[Innodb_buffer_pool_read_ahead_evicted]}
-SET Innodb_buffer_pool_read_ahead_rnd = ${mysql_data[Innodb_buffer_pool_read_ahead_rnd]}
-END
-BEGIN mysql_$x.innodb_buffer_pool_reqs $1
-SET Innodb_buffer_pool_read_requests = ${mysql_data[Innodb_buffer_pool_read_requests]}
-SET Innodb_buffer_pool_write_requests = ${mysql_data[Innodb_buffer_pool_write_requests]}
-END
-BEGIN mysql_$x.innodb_buffer_pool_ops $1
-SET Innodb_buffer_pool_reads = ${mysql_data[Innodb_buffer_pool_reads]}
-SET Innodb_buffer_pool_wait_free = ${mysql_data[Innodb_buffer_pool_wait_free]}
-END
-BEGIN mysql_$x.qcache_ops $1
-SET Qcache_hits hits = ${mysql_data[Qcache_hits]}
-SET Qcache_lowmem_prunes = ${mysql_data[Qcache_lowmem_prunes]}
-SET Qcache_inserts = ${mysql_data[Qcache_inserts]}
-SET Qcache_not_cached = ${mysql_data[Qcache_not_cached]}
-END
-BEGIN mysql_$x.qcache $1
-SET Qcache_queries_in_cache = ${mysql_data[Qcache_queries_in_cache]}
-END
-BEGIN mysql_$x.qcache_freemem $1
-SET Qcache_free_memory = ${mysql_data[Qcache_free_memory]}
-END
-BEGIN mysql_$x.qcache_memblocks $1
-SET Qcache_free_blocks = ${mysql_data[Qcache_free_blocks]}
-SET Qcache_total_blocks = ${mysql_data[Qcache_total_blocks]}
-END
-BEGIN mysql_$x.key_blocks $1
-SET Key_blocks_unused = ${mysql_data[Key_blocks_unused]}
-SET Key_blocks_used = ${mysql_data[Key_blocks_used]}
-SET Key_blocks_not_flushed = ${mysql_data[Key_blocks_not_flushed]}
-END
-BEGIN mysql_$x.key_requests $1
-SET Key_read_requests = ${mysql_data[Key_read_requests]}
-SET Key_write_requests = ${mysql_data[Key_write_requests]}
-END
-BEGIN mysql_$x.key_disk_ops $1
-SET Key_reads = ${mysql_data[Key_reads]}
-SET Key_writes = ${mysql_data[Key_writes]}
-END
-BEGIN mysql_$x.files $1
-SET Open_files = ${mysql_data[Open_files]}
-END
-BEGIN mysql_$x.files_rate $1
-SET Opened_files = ${mysql_data[Opened_files]}
-END
-VALUESEOF
-
-		if [ ! -z "${mysql_data[Binlog_stmt_cache_disk_use]}" ]; then
-			cat <<VALUESEOF
-BEGIN mysql_$x.binlog_stmt_cache $1
-SET Binlog_stmt_cache_disk_use = ${mysql_data[Binlog_stmt_cache_disk_use]}
-SET Binlog_stmt_cache_use = ${mysql_data[Binlog_stmt_cache_use]}
-END
-VALUESEOF
-		fi
-
-		if [ ! -z "${mysql_data[Connection_errors_accept]}" ]; then
-			cat <<VALUESEOF
-BEGIN mysql_$x.connection_errors $1
-SET Connection_errors_accept = ${mysql_data[Connection_errors_accept]}
-SET Connection_errors_internal = ${mysql_data[Connection_errors_internal]}
-SET Connection_errors_max_connections = ${mysql_data[Connection_errors_max_connections]}
-SET Connection_errors_peer_addr = ${mysql_data[Connection_errors_peer_addr]}
-SET Connection_errors_select = ${mysql_data[Connection_errors_select]}
-SET Connection_errors_tcpwrap = ${mysql_data[Connection_errors_tcpwrap]}
-END
-VALUESEOF
-		fi
-	done
-
-	[ ${#mysql_ids[@]} -eq 0 ] && error "no mysql servers left active." && return 1
-	return 0
-}
diff --git a/collectors/charts.d.plugin/mysql/mysql.conf b/collectors/charts.d.plugin/mysql/mysql.conf
deleted file mode 100644
index 683e4af35..000000000
--- a/collectors/charts.d.plugin/mysql/mysql.conf
+++ /dev/null
@@ -1,23 +0,0 @@
-# no need for shebang - this file is loaded from charts.d.plugin
-
-# netdata
-# real-time performance and health monitoring, done right!
-# (C) 2018 Costa Tsaousis <costa@tsaousis.gr>
-# GPL v3+
-
-# THIS PLUGIN IS DEPRECATED
-# USE THE PYTHON.D ONE
-
-#mysql_cmds[name]=""
-#mysql_opts[name]=""
-
-# the data collection frequency
-# if unset, will inherit the netdata update frequency
-#mysql_update_every=2
-
-# the charts priority on the dashboard
-#mysql_priority=60000
-
-# the number of retries to do in case of failure
-# before disabling the module
-#mysql_retries=10
diff --git a/collectors/charts.d.plugin/nginx/Makefile.inc b/collectors/charts.d.plugin/nginx/Makefile.inc
deleted file mode 100644
index c9d31aada..000000000
--- a/collectors/charts.d.plugin/nginx/Makefile.inc
+++ /dev/null
@@ -1,13 +0,0 @@
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-# THIS IS NOT A COMPLETE Makefile
-# IT IS INCLUDED BY ITS PARENT'S Makefile.am
-# IT IS REQUIRED TO REFERENCE ALL FILES RELATIVE TO THE PARENT
-
-# install these files
-dist_charts_DATA       += nginx/nginx.chart.sh
-dist_chartsconfig_DATA += nginx/nginx.conf
-
-# do not install these files, but include them in the distribution
-dist_noinst_DATA       += nginx/README.md nginx/Makefile.inc
-
diff --git a/collectors/charts.d.plugin/nginx/README.md b/collectors/charts.d.plugin/nginx/README.md
deleted file mode 100644
index 57b4a4b12..000000000
--- a/collectors/charts.d.plugin/nginx/README.md
+++ /dev/null
@@ -1,6 +0,0 @@
-# nginx
-
-> THIS MODULE IS OBSOLETE.
-> USE [THE PYTHON ONE](../../python.d.plugin/nginx) - IT SUPPORTS MULTIPLE JOBS AND IT IS MORE EFFICIENT
-
-[![analytics](https://www.google-analytics.com/collect?v=1&aip=1&t=pageview&_s=1&ds=github&dr=https%3A%2F%2Fgithub.com%2Fnetdata%2Fnetdata&dl=https%3A%2F%2Fmy-netdata.io%2Fgithub%2Fcollectors%2Fcharts.d.plugin%2Fnginx%2FREADME&_u=MAC~&cid=5792dfd7-8dc4-476b-af31-da2fdb9f93d2&tid=UA-64295674-3)](<>)
diff --git a/collectors/charts.d.plugin/nginx/nginx.chart.sh b/collectors/charts.d.plugin/nginx/nginx.chart.sh
deleted file mode 100644
index 812de2cbb..000000000
--- a/collectors/charts.d.plugin/nginx/nginx.chart.sh
+++ /dev/null
@@ -1,141 +0,0 @@
-# shellcheck shell=bash
-# no need for shebang - this file is loaded from charts.d.plugin
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-# netdata
-# real-time performance and health monitoring, done right!
-# (C) 2016 Costa Tsaousis <costa@tsaousis.gr>
-#
-
-# if this chart is called X.chart.sh, then all functions and global variables
-# must start with X_
-
-nginx_url="http://127.0.0.1:80/stub_status"
-nginx_curl_opts=""
-
-# _update_every is a special variable - it holds the number of seconds
-# between the calls of the _update() function
-nginx_update_every=
-nginx_priority=60000
-
-declare -a nginx_response=()
-nginx_active_connections=0
-nginx_accepts=0
-nginx_handled=0
-nginx_requests=0
-nginx_reading=0
-nginx_writing=0
-nginx_waiting=0
-nginx_get() {
-	# shellcheck disable=SC2207
-	nginx_response=($(run curl -Ss ${nginx_curl_opts} "${nginx_url}"))
-	# shellcheck disable=SC2181
-	if [ $? -ne 0 ] || [ "${#nginx_response[@]}" -eq 0 ]; then return 1; fi
-
-	if [ "${nginx_response[0]}" != "Active" ] ||
-		[ "${nginx_response[1]}" != "connections:" ] ||
-		[ "${nginx_response[3]}" != "server" ] ||
-		[ "${nginx_response[4]}" != "accepts" ] ||
-		[ "${nginx_response[5]}" != "handled" ] ||
-		[ "${nginx_response[6]}" != "requests" ] ||
-		[ "${nginx_response[10]}" != "Reading:" ] ||
-		[ "${nginx_response[12]}" != "Writing:" ] ||
-		[ "${nginx_response[14]}" != "Waiting:" ]; then
-		error "Invalid response from nginx server: ${nginx_response[*]}"
-		return 1
-	fi
-
-	nginx_active_connections="${nginx_response[2]}"
-	nginx_accepts="${nginx_response[7]}"
-	nginx_handled="${nginx_response[8]}"
-	nginx_requests="${nginx_response[9]}"
-	nginx_reading="${nginx_response[11]}"
-	nginx_writing="${nginx_response[13]}"
-	nginx_waiting="${nginx_response[15]}"
-
-	if [ -z "${nginx_active_connections}" ] ||
-		[ -z "${nginx_accepts}" ] ||
-		[ -z "${nginx_handled}" ] ||
-		[ -z "${nginx_requests}" ] ||
-		[ -z "${nginx_reading}" ] ||
-		[ -z "${nginx_writing}" ] ||
-		[ -z "${nginx_waiting}" ]; then
-		error "empty values got from nginx server: ${nginx_response[*]}"
-		return 1
-	fi
-
-	return 0
-}
-
-# _check is called once, to find out if this chart should be enabled or not
-nginx_check() {
-
-	nginx_get
-	# shellcheck disable=2181
-	if [ $? -ne 0 ]; then
-		# shellcheck disable=SC2154
-		error "cannot find stub_status on URL '${nginx_url}'. Please set nginx_url='http://nginx.server/stub_status' in $confd/nginx.conf"
-		return 1
-	fi
-
-	# this should return:
-	#  - 0 to enable the chart
-	#  - 1 to disable the chart
-
-	return 0
-}
-
-# _create is called once, to create the charts
-nginx_create() {
-	cat <<EOF
-CHART nginx_local.connections '' "nginx Active Connections" "connections" nginx nginx.connections line $((nginx_priority + 1)) $nginx_update_every
-DIMENSION active '' absolute 1 1
-
-CHART nginx_local.requests '' "nginx Requests" "requests/s" nginx nginx.requests line $((nginx_priority + 2)) $nginx_update_every
-DIMENSION requests '' incremental 1 1
-
-CHART nginx_local.connections_status '' "nginx Active Connections by Status" "connections" nginx nginx.connections.status line $((nginx_priority + 3)) $nginx_update_every
-DIMENSION reading '' absolute 1 1
-DIMENSION writing '' absolute 1 1
-DIMENSION waiting idle absolute 1 1
-
-CHART nginx_local.connect_rate '' "nginx Connections Rate" "connections/s" nginx nginx.connections.rate line $((nginx_priority + 4)) $nginx_update_every
-DIMENSION accepts accepted incremental 1 1
-DIMENSION handled '' incremental 1 1
-EOF
-
-	return 0
-}
-
-# _update is called continuously, to collect the values
-nginx_update() {
-	# the first argument to this function is the microseconds since last update
-	# pass this parameter to the BEGIN statement (see bellow).
-
-	# do all the work to collect / calculate the values
-	# for each dimension
-	# remember: KEEP IT SIMPLE AND SHORT
-
-	nginx_get || return 1
-
-	# write the result of the work.
-	cat <<VALUESEOF
-BEGIN nginx_local.connections $1
-SET active = $((nginx_active_connections))
-END
-BEGIN nginx_local.requests $1
-SET requests = $((nginx_requests))
-END
-BEGIN nginx_local.connections_status $1
-SET reading = $((nginx_reading))
-SET writing = $((nginx_writing))
-SET waiting = $((nginx_waiting))
-END
-BEGIN nginx_local.connect_rate $1
-SET accepts = $((nginx_accepts))
-SET handled = $((nginx_handled))
-END
-VALUESEOF
-
-	return 0
-}
diff --git a/collectors/charts.d.plugin/nginx/nginx.conf b/collectors/charts.d.plugin/nginx/nginx.conf
deleted file mode 100644
index c46100a58..000000000
--- a/collectors/charts.d.plugin/nginx/nginx.conf
+++ /dev/null
@@ -1,23 +0,0 @@
-# no need for shebang - this file is loaded from charts.d.plugin
-
-# netdata
-# real-time performance and health monitoring, done right!
-# (C) 2018 Costa Tsaousis <costa@tsaousis.gr>
-# GPL v3+
-
-# THIS PLUGIN IS DEPRECATED
-# USE THE PYTHON.D ONE
-
-#nginx_url="http://127.0.0.1:80/stub_status"
-#nginx_curl_opts=""
-
-# the data collection frequency
-# if unset, will inherit the netdata update frequency
-#nginx_update_every=
-
-# the charts priority on the dashboard
-#nginx_priority=60000
-
-# the number of retries to do in case of failure
-# before disabling the module
-#nginx_retries=10
diff --git a/collectors/charts.d.plugin/nut/README.md b/collectors/charts.d.plugin/nut/README.md
index ea93318f8..3f9c5f0a2 100644
--- a/collectors/charts.d.plugin/nut/README.md
+++ b/collectors/charts.d.plugin/nut/README.md
@@ -1,6 +1,12 @@
-# nut
+<!--
+title: "UPS/PDU monitoring with Netdata"
+custom_edit_url: https://github.com/netdata/netdata/edit/master/collectors/charts.d.plugin/nut/README.md
+sidebar_label: "UPS/PDU"
+-->
 
-The plugin will collect UPS data for all UPSes configured in the system.
+# UPS/PDU monitoring with Netdata
+
+Collects UPS data for all power devices configured in the system.
 
 The following charts will be created:
 
@@ -42,9 +48,17 @@ The following charts will be created:
 
 -   current temperature
 
-## configuration
+## Configuration
+
+Edit the `charts.d/nut.conf` configuration file using `edit-config` from the Netdata [config
+directory](/docs/configure/nodes.md), which is typically at `/etc/netdata`.
+
+```bash
+cd /etc/netdata   # Replace this path with your Netdata config directory, if different
+sudo ./edit-config charts.d/nut.conf
+```
 
-This is the internal default for `/etc/netdata/nut.conf`
+This is the internal default for `charts.d/nut.conf`
 
 ```sh
 # a space separated list of UPS names
diff --git a/collectors/charts.d.plugin/nut/nut.chart.sh b/collectors/charts.d.plugin/nut/nut.chart.sh
index 933d3561d..60233361e 100644
--- a/collectors/charts.d.plugin/nut/nut.chart.sh
+++ b/collectors/charts.d.plugin/nut/nut.chart.sh
@@ -28,59 +28,59 @@ declare -A nut_ids=()
 declare -A nut_names=()
 
 nut_get_all() {
-	run -t $nut_timeout upsc -l
+  run -t $nut_timeout upsc -l
 }
 
 nut_get() {
-	run -t $nut_timeout upsc "$1"
+  run -t $nut_timeout upsc "$1"
 
-	if [ "${nut_clients_chart}" -eq "1" ]; then
-		printf "ups.connected_clients: "
-		run -t $nut_timeout upsc -c "$1" | wc -l
-	fi
+  if [ "${nut_clients_chart}" -eq "1" ]; then
+    printf "ups.connected_clients: "
+    run -t $nut_timeout upsc -c "$1" | wc -l
+  fi
 }
 
 nut_check() {
 
-	# this should return:
-	#  - 0 to enable the chart
-	#  - 1 to disable the chart
-
-	local x
-
-	require_cmd upsc || return 1
-
-	[ -z "$nut_ups" ] && nut_ups="$(nut_get_all)"
-
-	for x in $nut_ups; do
-		nut_get "$x" >/dev/null
-		# shellcheck disable=SC2181
-		if [ $? -eq 0 ]; then
-			if [ ! -z "${nut_names[${x}]}" ]; then
-				nut_ids[$x]="$(fixid "${nut_names[${x}]}")"
-			else
-				nut_ids[$x]="$(fixid "$x")"
-			fi
-			continue
-		fi
-		error "cannot get information for NUT UPS '$x'."
-	done
-
-	if [ ${#nut_ids[@]} -eq 0 ]; then
-		# shellcheck disable=SC2154
-		error "Cannot find UPSes - please set nut_ups='ups_name' in $confd/nut.conf"
-		return 1
-	fi
-
-	return 0
+  # this should return:
+  #  - 0 to enable the chart
+  #  - 1 to disable the chart
+
+  local x
+
+  require_cmd upsc || return 1
+
+  [ -z "$nut_ups" ] && nut_ups="$(nut_get_all)"
+
+  for x in $nut_ups; do
+    nut_get "$x" > /dev/null
+    # shellcheck disable=SC2181
+    if [ $? -eq 0 ]; then
+      if [ -n "${nut_names[${x}]}" ]; then
+        nut_ids[$x]="$(fixid "${nut_names[${x}]}")"
+      else
+        nut_ids[$x]="$(fixid "$x")"
+      fi
+      continue
+    fi
+    error "cannot get information for NUT UPS '$x'."
+  done
+
+  if [ ${#nut_ids[@]} -eq 0 ]; then
+    # shellcheck disable=SC2154
+    error "Cannot find UPSes - please set nut_ups='ups_name' in $confd/nut.conf"
+    return 1
+  fi
+
+  return 0
 }
 
 nut_create() {
-	# create the charts
-	local x
+  # create the charts
+  local x
 
-	for x in "${nut_ids[@]}"; do
-		cat <<EOF
+  for x in "${nut_ids[@]}"; do
+    cat << EOF
 CHART nut_$x.charge '' "UPS Charge" "percentage" ups nut.charge area $((nut_priority + 1)) $nut_update_every
 DIMENSION battery_charge charge absolute 1 100
 
@@ -115,30 +115,30 @@ CHART nut_$x.temp '' "UPS Temperature" "temperature" ups nut.temperature line $(
 DIMENSION temp temp absolute 1 100
 EOF
 
-		if [ "${nut_clients_chart}" = "1" ]; then
-			cat <<EOF2
+    if [ "${nut_clients_chart}" = "1" ]; then
+      cat << EOF2
 CHART nut_$x.clients '' "UPS Connected Clients" "clients" ups nut.clients area $((nut_priority + 9)) $nut_update_every
 DIMENSION clients '' absolute 1 1
 EOF2
-		fi
+    fi
 
-	done
+  done
 
-	return 0
+  return 0
 }
 
 nut_update() {
-	# the first argument to this function is the microseconds since last update
-	# pass this parameter to the BEGIN statement (see bellow).
+  # the first argument to this function is the microseconds since last update
+  # pass this parameter to the BEGIN statement (see bellow).
 
-	# do all the work to collect / calculate the values
-	# for each dimension
-	# remember: KEEP IT SIMPLE AND SHORT
+  # do all the work to collect / calculate the values
+  # for each dimension
+  # remember: KEEP IT SIMPLE AND SHORT
 
-	local i x
-	for i in "${!nut_ids[@]}"; do
-		x="${nut_ids[$i]}"
-		nut_get "$i" | awk "
+  local i x
+  for i in "${!nut_ids[@]}"; do
+    x="${nut_ids[$i]}"
+    nut_get "$i" | awk "
 BEGIN {
 	battery_charge = 0;
     battery_runtime = 0;
@@ -223,10 +223,10 @@ END {
 		print \"END\"
 	}
 }"
-		# shellcheck disable=2181
-		[ $? -ne 0 ] && unset "nut_ids[$i]" && error "failed to get values for '$i', disabling it."
-	done
+    # shellcheck disable=2181
+    [ $? -ne 0 ] && unset "nut_ids[$i]" && error "failed to get values for '$i', disabling it."
+  done
 
-	[ ${#nut_ids[@]} -eq 0 ] && error "no UPSes left active." && return 1
-	return 0
+  [ ${#nut_ids[@]} -eq 0 ] && error "no UPSes left active." && return 1
+  return 0
 }
diff --git a/collectors/charts.d.plugin/opensips/README.md b/collectors/charts.d.plugin/opensips/README.md
index d41b41120..7575a1dad 100644
--- a/collectors/charts.d.plugin/opensips/README.md
+++ b/collectors/charts.d.plugin/opensips/README.md
@@ -1,7 +1,19 @@
-# OpenSIPS
+<!--
+title: "OpenSIPS monitoring with Netdata"
+custom_edit_url: https://github.com/netdata/netdata/edit/master/collectors/charts.d.plugin/opensips/README.md
+sidebar_label: "OpenSIPS"
+-->
 
-_Under construction_
+# OpenSIPS monitoring with Netdata
 
-Collects OpenSIPS metrics
+## Configuration
+
+Edit the `charts.d/opensips.conf` configuration file using `edit-config` from the Netdata [config
+directory](/docs/configure/nodes.md), which is typically at `/etc/netdata`.
+
+```bash
+cd /etc/netdata   # Replace this path with your Netdata config directory, if different
+sudo ./edit-config charts.d/opensips.conf
+```
 
 [![analytics](https://www.google-analytics.com/collect?v=1&aip=1&t=pageview&_s=1&ds=github&dr=https%3A%2F%2Fgithub.com%2Fnetdata%2Fnetdata&dl=https%3A%2F%2Fmy-netdata.io%2Fgithub%2Fcollectors%2Fcharts.d.plugin%2Fopensips%2FREADME&_u=MAC~&cid=5792dfd7-8dc4-476b-af31-da2fdb9f93d2&tid=UA-64295674-3)](<>)
diff --git a/collectors/charts.d.plugin/opensips/opensips.chart.sh b/collectors/charts.d.plugin/opensips/opensips.chart.sh
index b42462d6d..8ff3e32ef 100644
--- a/collectors/charts.d.plugin/opensips/opensips.chart.sh
+++ b/collectors/charts.d.plugin/opensips/opensips.chart.sh
@@ -14,40 +14,40 @@ opensips_timeout=2
 opensips_priority=80000
 
 opensips_get_stats() {
-	run -t $opensips_timeout "$opensips_cmd" $opensips_opts |
-		grep "^\(core\|dialog\|net\|registrar\|shmem\|siptrace\|sl\|tm\|uri\|usrloc\):[a-zA-Z0-9_-]\+[[:space:]]*[=:]\+[[:space:]]*[0-9]\+[[:space:]]*$" |
-		sed \
-			-e "s|[[:space:]]*[=:]\+[[:space:]]*\([0-9]\+\)[[:space:]]*$|=\1|g" \
-			-e "s|[[:space:]:-]\+|_|g" \
-			-e "s|^|opensips_|g"
-
-	local ret=$?
-	[ $ret -ne 0 ] && echo "opensips_command_failed=1"
-	return $ret
+  run -t $opensips_timeout "$opensips_cmd" $opensips_opts |
+    grep "^\(core\|dialog\|net\|registrar\|shmem\|siptrace\|sl\|tm\|uri\|usrloc\):[a-zA-Z0-9_-]\+[[:space:]]*[=:]\+[[:space:]]*[0-9]\+[[:space:]]*$" |
+    sed \
+      -e "s|[[:space:]]*[=:]\+[[:space:]]*\([0-9]\+\)[[:space:]]*$|=\1|g" \
+      -e "s|[[:space:]:-]\+|_|g" \
+      -e "s|^|opensips_|g"
+
+  local ret=$?
+  [ $ret -ne 0 ] && echo "opensips_command_failed=1"
+  return $ret
 }
 
 opensips_check() {
-	# if the user did not provide an opensips_cmd
-	# try to find it in the system
-	if [ -z "$opensips_cmd" ]; then
-		require_cmd opensipsctl || return 1
-	fi
-
-	# check once if the command works
-	local x
-	x="$(opensips_get_stats | grep "^opensips_core_")"
-	# shellcheck disable=SC2181
-	if [ ! $? -eq 0 ] || [ -z "$x" ]; then
-		error "cannot get global status. Please set opensips_opts='options' whatever needed to get connected to opensips server, in $confd/opensips.conf"
-		return 1
-	fi
-
-	return 0
+  # if the user did not provide an opensips_cmd
+  # try to find it in the system
+  if [ -z "$opensips_cmd" ]; then
+    require_cmd opensipsctl || return 1
+  fi
+
+  # check once if the command works
+  local x
+  x="$(opensips_get_stats | grep "^opensips_core_")"
+  # shellcheck disable=SC2181
+  if [ ! $? -eq 0 ] || [ -z "$x" ]; then
+    error "cannot get global status. Please set opensips_opts='options' whatever needed to get connected to opensips server, in $confd/opensips.conf"
+    return 1
+  fi
+
+  return 0
 }
 
 opensips_create() {
-	# create the charts
-	cat <<EOF
+  # create the charts
+  cat << EOF
 CHART opensips.dialogs_active '' "OpenSIPS Active Dialogs" "dialogs" dialogs '' area $((opensips_priority + 1)) $opensips_update_every
 DIMENSION dialog_active_dialogs active absolute 1 1
 DIMENSION dialog_early_dialogs early absolute -1 1
@@ -141,91 +141,91 @@ CHART opensips.shmem_fragments '' "OpenSIPS Shared Memory Fragmentation" "fragme
 DIMENSION shmem_fragments fragments absolute 1 1
 EOF
 
-	return 0
+  return 0
 }
 
 opensips_update() {
-	# the first argument to this function is the microseconds since last update
-	# pass this parameter to the BEGIN statement (see bellow).
-
-	# do all the work to collect / calculate the values
-	# for each dimension
-
-	# 1. get the counters page from opensips
-	# 2. sed to remove spaces; replace . with _; remove spaces around =; prepend each line with: local opensips_
-	# 3. egrep lines starting with:
-	#    local opensips_client_http_ then one or more of these a-z 0-9 _ then = and one of more of 0-9
-	#    local opensips_server_all_ then one or more of these a-z 0-9 _ then = and one of more of 0-9
-	# 4. then execute this as a script with the eval
-	#    be very carefull with eval:
-	#    prepare the script and always grep at the end the lines that are usefull, so that
-	#    even if something goes wrong, no other code can be executed
-
-	unset \
-		opensips_dialog_active_dialogs \
-		opensips_dialog_early_dialogs \
-		opensips_usrloc_registered_users \
-		opensips_usrloc_location_users \
-		opensips_usrloc_location_contacts \
-		opensips_usrloc_location_expires \
-		opensips_registrar_accepted_regs \
-		opensips_registrar_rejected_regs \
-		opensips_tm_UAS_transactions \
-		opensips_tm_UAC_transactions \
-		opensips_core_rcv_requests \
-		opensips_core_rcv_replies \
-		opensips_core_fwd_requests \
-		opensips_core_fwd_replies \
-		opensips_core_drop_requests \
-		opensips_core_drop_replies \
-		opensips_core_err_requests \
-		opensips_core_err_replies \
-		opensips_core_bad_URIs_rcvd \
-		opensips_core_unsupported_methods \
-		opensips_core_bad_msg_hdr \
-		opensips_tm_received_replies \
-		opensips_tm_relayed_replies \
-		opensips_tm_local_replies \
-		opensips_tm_2xx_transactions \
-		opensips_tm_3xx_transactions \
-		opensips_tm_4xx_transactions \
-		opensips_tm_5xx_transactions \
-		opensips_tm_6xx_transactions \
-		opensips_tm_inuse_transactions \
-		opensips_sl_1xx_replies \
-		opensips_sl_2xx_replies \
-		opensips_sl_3xx_replies \
-		opensips_sl_4xx_replies \
-		opensips_sl_5xx_replies \
-		opensips_sl_6xx_replies \
-		opensips_sl_sent_replies \
-		opensips_sl_sent_err_replies \
-		opensips_sl_received_ACKs \
-		opensips_dialog_processed_dialogs \
-		opensips_dialog_expired_dialogs \
-		opensips_dialog_failed_dialogs \
-		opensips_net_waiting_udp \
-		opensips_net_waiting_tcp \
-		opensips_uri_positive_checks \
-		opensips_uri_negative_checks \
-		opensips_siptrace_traced_requests \
-		opensips_siptrace_traced_replies \
-		opensips_shmem_total_size \
-		opensips_shmem_used_size \
-		opensips_shmem_real_used_size \
-		opensips_shmem_max_used_size \
-		opensips_shmem_free_size \
-		opensips_shmem_fragments
-
-	opensips_command_failed=0
-	eval "local $(opensips_get_stats)"
-	# shellcheck disable=SC2181
-	[ $? -ne 0 ] && return 1
-
-	[ $opensips_command_failed -eq 1 ] && error "failed to get values, disabling." && return 1
-
-	# write the result of the work.
-	cat <<VALUESEOF
+  # the first argument to this function is the microseconds since last update
+  # pass this parameter to the BEGIN statement (see bellow).
+
+  # do all the work to collect / calculate the values
+  # for each dimension
+
+  # 1. get the counters page from opensips
+  # 2. sed to remove spaces; replace . with _; remove spaces around =; prepend each line with: local opensips_
+  # 3. egrep lines starting with:
+  #    local opensips_client_http_ then one or more of these a-z 0-9 _ then = and one of more of 0-9
+  #    local opensips_server_all_ then one or more of these a-z 0-9 _ then = and one of more of 0-9
+  # 4. then execute this as a script with the eval
+  #    be very carefull with eval:
+  #    prepare the script and always grep at the end the lines that are usefull, so that
+  #    even if something goes wrong, no other code can be executed
+
+  unset \
+    opensips_dialog_active_dialogs \
+    opensips_dialog_early_dialogs \
+    opensips_usrloc_registered_users \
+    opensips_usrloc_location_users \
+    opensips_usrloc_location_contacts \
+    opensips_usrloc_location_expires \
+    opensips_registrar_accepted_regs \
+    opensips_registrar_rejected_regs \
+    opensips_tm_UAS_transactions \
+    opensips_tm_UAC_transactions \
+    opensips_core_rcv_requests \
+    opensips_core_rcv_replies \
+    opensips_core_fwd_requests \
+    opensips_core_fwd_replies \
+    opensips_core_drop_requests \
+    opensips_core_drop_replies \
+    opensips_core_err_requests \
+    opensips_core_err_replies \
+    opensips_core_bad_URIs_rcvd \
+    opensips_core_unsupported_methods \
+    opensips_core_bad_msg_hdr \
+    opensips_tm_received_replies \
+    opensips_tm_relayed_replies \
+    opensips_tm_local_replies \
+    opensips_tm_2xx_transactions \
+    opensips_tm_3xx_transactions \
+    opensips_tm_4xx_transactions \
+    opensips_tm_5xx_transactions \
+    opensips_tm_6xx_transactions \
+    opensips_tm_inuse_transactions \
+    opensips_sl_1xx_replies \
+    opensips_sl_2xx_replies \
+    opensips_sl_3xx_replies \
+    opensips_sl_4xx_replies \
+    opensips_sl_5xx_replies \
+    opensips_sl_6xx_replies \
+    opensips_sl_sent_replies \
+    opensips_sl_sent_err_replies \
+    opensips_sl_received_ACKs \
+    opensips_dialog_processed_dialogs \
+    opensips_dialog_expired_dialogs \
+    opensips_dialog_failed_dialogs \
+    opensips_net_waiting_udp \
+    opensips_net_waiting_tcp \
+    opensips_uri_positive_checks \
+    opensips_uri_negative_checks \
+    opensips_siptrace_traced_requests \
+    opensips_siptrace_traced_replies \
+    opensips_shmem_total_size \
+    opensips_shmem_used_size \
+    opensips_shmem_real_used_size \
+    opensips_shmem_max_used_size \
+    opensips_shmem_free_size \
+    opensips_shmem_fragments
+
+  opensips_command_failed=0
+  eval "local $(opensips_get_stats)"
+  # shellcheck disable=SC2181
+  [ $? -ne 0 ] && return 1
+
+  [ $opensips_command_failed -eq 1 ] && error "failed to get values, disabling." && return 1
+
+  # write the result of the work.
+  cat << VALUESEOF
 BEGIN opensips.dialogs_active $1
 SET dialog_active_dialogs = $opensips_dialog_active_dialogs
 SET dialog_early_dialogs = $opensips_dialog_early_dialogs
@@ -320,5 +320,5 @@ SET shmem_fragments = $opensips_shmem_fragments
 END
 VALUESEOF
 
-	return 0
+  return 0
 }
diff --git a/collectors/charts.d.plugin/phpfpm/Makefile.inc b/collectors/charts.d.plugin/phpfpm/Makefile.inc
deleted file mode 100644
index 56bff6102..000000000
--- a/collectors/charts.d.plugin/phpfpm/Makefile.inc
+++ /dev/null
@@ -1,13 +0,0 @@
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-# THIS IS NOT A COMPLETE Makefile
-# IT IS INCLUDED BY ITS PARENT'S Makefile.am
-# IT IS REQUIRED TO REFERENCE ALL FILES RELATIVE TO THE PARENT
-
-# install these files
-dist_charts_DATA       += phpfpm/phpfpm.chart.sh
-dist_chartsconfig_DATA += phpfpm/phpfpm.conf
-
-# do not install these files, but include them in the distribution
-dist_noinst_DATA       += phpfpm/README.md phpfpm/Makefile.inc
-
diff --git a/collectors/charts.d.plugin/phpfpm/README.md b/collectors/charts.d.plugin/phpfpm/README.md
deleted file mode 100644
index f8976301b..000000000
--- a/collectors/charts.d.plugin/phpfpm/README.md
+++ /dev/null
@@ -1,6 +0,0 @@
-# phpfm
-
-> THIS MODULE IS OBSOLETE.
-> USE [THE PYTHON ONE](../../python.d.plugin/phpfpm) - IT SUPPORTS MULTIPLE JOBS AND IT IS MORE EFFICIENT
-
-[![analytics](https://www.google-analytics.com/collect?v=1&aip=1&t=pageview&_s=1&ds=github&dr=https%3A%2F%2Fgithub.com%2Fnetdata%2Fnetdata&dl=https%3A%2F%2Fmy-netdata.io%2Fgithub%2Fcollectors%2Fcharts.d.plugin%2Fphpfpm%2FREADME&_u=MAC~&cid=5792dfd7-8dc4-476b-af31-da2fdb9f93d2&tid=UA-64295674-3)](<>)
diff --git a/collectors/charts.d.plugin/phpfpm/phpfpm.chart.sh b/collectors/charts.d.plugin/phpfpm/phpfpm.chart.sh
deleted file mode 100644
index b1edb2373..000000000
--- a/collectors/charts.d.plugin/phpfpm/phpfpm.chart.sh
+++ /dev/null
@@ -1,169 +0,0 @@
-# shellcheck shell=bash
-# no need for shebang - this file is loaded from charts.d.plugin
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-# netdata
-# real-time performance and health monitoring, done right!
-# (C) 2016 Costa Tsaousis <costa@tsaousis.gr>
-#
-# Contributed by @safeie with PR #276
-
-# first, you need open php-fpm status in php-fpm.conf
-# second, you need add status location in nginx.conf
-# you can see, https://easyengine.io/tutorials/php/fpm-status-page/
-
-declare -A phpfpm_urls=()
-declare -A phpfpm_curl_opts=()
-
-# _update_every is a special variable - it holds the number of seconds
-# between the calls of the _update() function
-phpfpm_update_every=
-phpfpm_priority=60000
-
-declare -a phpfpm_response=()
-phpfpm_pool=""
-phpfpm_start_time=""
-phpfpm_start_since=0
-phpfpm_accepted_conn=0
-phpfpm_listen_queue=0
-phpfpm_max_listen_queue=0
-phpfpm_listen_queue_len=0
-phpfpm_idle_processes=0
-phpfpm_active_processes=0
-phpfpm_total_processes=0
-phpfpm_max_active_processes=0
-phpfpm_max_children_reached=0
-phpfpm_slow_requests=0
-phpfpm_get() {
-	local opts="${1}" url="${2}"
-
-	# shellcheck disable=SC2207,2086
-	phpfpm_response=($(run curl -Ss ${opts} "${url}"))
-	# shellcheck disable=SC2181
-	if [ $? -ne 0 ] || [ "${#phpfpm_response[@]}" -eq 0 ]; then
-		return 1
-	fi
-
-	if [[ ${phpfpm_response[0]} != "pool:" || ${phpfpm_response[2]} != "process" || ${phpfpm_response[5]} != "start" || ${phpfpm_response[12]} != "accepted" || ${phpfpm_response[15]} != "listen" || ${phpfpm_response[16]} != "queue:" || ${phpfpm_response[26]} != "idle" || ${phpfpm_response[29]} != "active" || ${phpfpm_response[32]} != "total" ]]; then
-		error "invalid response from phpfpm status server: ${phpfpm_response[*]}"
-		return 1
-	fi
-
-	phpfpm_pool="${phpfpm_response[1]}"
-	phpfpm_start_time="${phpfpm_response[7]} ${phpfpm_response[8]}"
-	phpfpm_start_since="${phpfpm_response[11]}"
-	phpfpm_accepted_conn="${phpfpm_response[14]}"
-	phpfpm_listen_queue="${phpfpm_response[17]}"
-	phpfpm_max_listen_queue="${phpfpm_response[21]}"
-	phpfpm_listen_queue_len="${phpfpm_response[25]}"
-	phpfpm_idle_processes="${phpfpm_response[28]}"
-	phpfpm_active_processes="${phpfpm_response[31]}"
-	phpfpm_total_processes="${phpfpm_response[34]}"
-	phpfpm_max_active_processes="${phpfpm_response[38]}"
-	phpfpm_max_children_reached="${phpfpm_response[42]}"
-	if [ "${phpfpm_response[43]}" == "slow" ]; then
-		phpfpm_slow_requests="${phpfpm_response[45]}"
-	else
-		phpfpm_slow_requests="-1"
-	fi
-
-	if [[ -z ${phpfpm_pool} || -z ${phpfpm_start_time} || -z ${phpfpm_start_since} || -z ${phpfpm_accepted_conn} || -z ${phpfpm_listen_queue} || -z ${phpfpm_max_listen_queue} || -z ${phpfpm_listen_queue_len} || -z ${phpfpm_idle_processes} || -z ${phpfpm_active_processes} || -z ${phpfpm_total_processes} || -z ${phpfpm_max_active_processes} || -z ${phpfpm_max_children_reached} ]]; then
-		error "empty values got from phpfpm status server: ${phpfpm_response[*]}"
-		return 1
-	fi
-
-	return 0
-}
-
-# _check is called once, to find out if this chart should be enabled or not
-phpfpm_check() {
-	if [ ${#phpfpm_urls[@]} -eq 0 ]; then
-		phpfpm_urls[local]="http://localhost/status"
-	fi
-
-	local m
-	for m in "${!phpfpm_urls[@]}"; do
-		phpfpm_get "${phpfpm_curl_opts[$m]}" "${phpfpm_urls[$m]}"
-		# shellcheck disable=SC2181
-		if [ $? -ne 0 ]; then
-			# shellcheck disable=SC2154
-			error "cannot find status on URL '${phpfpm_urls[$m]}'. Please set phpfpm_urls[$m]='http://localhost/status' in $confd/phpfpm.conf"
-			unset "phpfpm_urls[$m]"
-			continue
-		fi
-	done
-
-	if [ ${#phpfpm_urls[@]} -eq 0 ]; then
-		error "no phpfpm servers found. Please set phpfpm_urls[name]='url' to whatever needed to get status to the phpfpm server, in $confd/phpfpm.conf"
-		return 1
-	fi
-
-	# this should return:
-	#  - 0 to enable the chart
-	#  - 1 to disable the chart
-
-	return 0
-}
-
-# _create is called once, to create the charts
-phpfpm_create() {
-	local m
-	for m in "${!phpfpm_urls[@]}"; do
-		cat <<EOF
-CHART phpfpm_$m.connections '' "PHP-FPM Active Connections" "connections" phpfpm phpfpm.connections line $((phpfpm_priority + 1)) $phpfpm_update_every
-DIMENSION active '' absolute 1 1
-DIMENSION maxActive 'max active' absolute 1 1
-DIMENSION idle '' absolute 1 1
-
-CHART phpfpm_$m.requests '' "PHP-FPM Requests" "requests/s" phpfpm phpfpm.requests line $((phpfpm_priority + 2)) $phpfpm_update_every
-DIMENSION requests '' incremental 1 1
-
-CHART phpfpm_$m.performance '' "PHP-FPM Performance" "status" phpfpm phpfpm.performance line $((phpfpm_priority + 3)) $phpfpm_update_every
-DIMENSION reached 'max children reached' absolute 1 1
-EOF
-		if [ $((phpfpm_slow_requests)) -ne -1 ]; then
-			echo "DIMENSION slow 'slow requests' absolute 1 1"
-		fi
-	done
-
-	return 0
-}
-
-# _update is called continuously, to collect the values
-phpfpm_update() {
-	# the first argument to this function is the microseconds since last update
-	# pass this parameter to the BEGIN statement (see bellow).
-
-	# do all the work to collect / calculate the values
-	# for each dimension
-	# remember: KEEP IT SIMPLE AND SHORT
-
-	local m
-	for m in "${!phpfpm_urls[@]}"; do
-		phpfpm_get "${phpfpm_curl_opts[$m]}" "${phpfpm_urls[$m]}"
-		# shellcheck disable=SC2181
-		if [ $? -ne 0 ]; then
-			continue
-		fi
-
-		# write the result of the work.
-		cat <<EOF
-BEGIN phpfpm_$m.connections $1
-SET active = $((phpfpm_active_processes))
-SET maxActive = $((phpfpm_max_active_processes))
-SET idle = $((phpfpm_idle_processes))
-END
-BEGIN phpfpm_$m.requests $1
-SET requests = $((phpfpm_accepted_conn))
-END
-BEGIN phpfpm_$m.performance $1
-SET reached = $((phpfpm_max_children_reached))
-EOF
-		if [ $((phpfpm_slow_requests)) -ne -1 ]; then
-			echo "SET slow = $((phpfpm_slow_requests))"
-		fi
-		echo "END"
-	done
-
-	return 0
-}
diff --git a/collectors/charts.d.plugin/phpfpm/phpfpm.conf b/collectors/charts.d.plugin/phpfpm/phpfpm.conf
deleted file mode 100644
index e4dd0231b..000000000
--- a/collectors/charts.d.plugin/phpfpm/phpfpm.conf
+++ /dev/null
@@ -1,27 +0,0 @@
-# no need for shebang - this file is loaded from charts.d.plugin
-
-# netdata
-# real-time performance and health monitoring, done right!
-# (C) 2018 Costa Tsaousis <costa@tsaousis.gr>
-# GPL v3+
-
-# THIS PLUGIN IS DEPRECATED
-# USE THE PYTHON.D ONE
-
-# first, you need open php-fpm status in php-fpm.conf
-# second, you need add status location in nginx.conf
-# you can see, https://easyengine.io/tutorials/php/fpm-status-page/
-#phpfpm_urls[name]=""
-#phpfpm_curl_opts[name]=""
-
-# the data collection frequency
-# if unset, will inherit the netdata update frequency
-#phpfpm_update_every=
-
-# the charts priority on the dashboard
-#phpfpm_priority=60000
-
-# the number of retries to do in case of failure
-# before disabling the module
-#phpfpm_retries=10
-
diff --git a/collectors/charts.d.plugin/postfix/Makefile.inc b/collectors/charts.d.plugin/postfix/Makefile.inc
deleted file mode 100644
index 6e148352d..000000000
--- a/collectors/charts.d.plugin/postfix/Makefile.inc
+++ /dev/null
@@ -1,13 +0,0 @@
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-# THIS IS NOT A COMPLETE Makefile
-# IT IS INCLUDED BY ITS PARENT'S Makefile.am
-# IT IS REQUIRED TO REFERENCE ALL FILES RELATIVE TO THE PARENT
-
-# install these files
-dist_charts_DATA       += postfix/postfix.chart.sh
-dist_chartsconfig_DATA += postfix/postfix.conf
-
-# do not install these files, but include them in the distribution
-dist_noinst_DATA       += postfix/README.md postfix/Makefile.inc
-
diff --git a/collectors/charts.d.plugin/postfix/README.md b/collectors/charts.d.plugin/postfix/README.md
deleted file mode 100644
index d9bf77f2f..000000000
--- a/collectors/charts.d.plugin/postfix/README.md
+++ /dev/null
@@ -1,28 +0,0 @@
-# postfix
-
-> THIS MODULE IS OBSOLETE.
-> USE [THE PYTHON ONE](../../python.d.plugin/postfix) - IT SUPPORTS MULTIPLE JOBS AND IT IS MORE EFFICIENT
-
-The plugin will collect the postfix queue size.
-
-It will create two charts:
-
-1.  **queue size in emails**
-2.  **queue size in KB**
-
-## configuration
-
-This is the internal default for `/etc/netdata/postfix.conf`
-
-```sh
-# the postqueue command
-# if empty, it will use the one found in the system path
-postfix_postqueue=
-
-# how frequently to collect queue size
-postfix_update_every=15
-```
-
----
-
-[![analytics](https://www.google-analytics.com/collect?v=1&aip=1&t=pageview&_s=1&ds=github&dr=https%3A%2F%2Fgithub.com%2Fnetdata%2Fnetdata&dl=https%3A%2F%2Fmy-netdata.io%2Fgithub%2Fcollectors%2Fcharts.d.plugin%2Fpostfix%2FREADME&_u=MAC~&cid=5792dfd7-8dc4-476b-af31-da2fdb9f93d2&tid=UA-64295674-3)](<>)
diff --git a/collectors/charts.d.plugin/postfix/postfix.chart.sh b/collectors/charts.d.plugin/postfix/postfix.chart.sh
deleted file mode 100644
index ff59db9fe..000000000
--- a/collectors/charts.d.plugin/postfix/postfix.chart.sh
+++ /dev/null
@@ -1,87 +0,0 @@
-# shellcheck shell=bash disable=SC1117
-# no need for shebang - this file is loaded from charts.d.plugin
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-# netdata
-# real-time performance and health monitoring, done right!
-# (C) 2016 Costa Tsaousis <costa@tsaousis.gr>
-#
-
-# the postqueue command
-# if empty, it will use the one found in the system path
-postfix_postqueue=
-
-# how frequently to collect queue size
-postfix_update_every=15
-
-postfix_priority=60000
-
-postfix_check() {
-	# this should return:
-	#  - 0 to enable the chart
-	#  - 1 to disable the chart
-
-	# try to find the postqueue executable
-	if [ -z "$postfix_postqueue" ] || [ ! -x "$postfix_postqueue" ]; then
-		# shellcheck disable=SC2230
-		postfix_postqueue="$(which postqueue 2>/dev/null || command -v postqueue 2>/dev/null)"
-	fi
-
-	if [ -z "$postfix_postqueue" ] || [ ! -x "$postfix_postqueue" ]; then
-		# shellcheck disable=SC2154
-		error "cannot find postqueue. Please set 'postfix_postqueue=/path/to/postqueue' in $confd/postfix.conf"
-		return 1
-	fi
-
-	return 0
-}
-
-postfix_create() {
-	cat <<EOF
-CHART postfix_local.qemails '' "Postfix Queue Emails" "emails" queue postfix.queued.emails line $((postfix_priority + 1)) $postfix_update_every
-DIMENSION emails '' absolute 1 1
-CHART postfix_local.qsize '' "Postfix Queue Emails Size" "emails size in KB" queue postfix.queued.size area $((postfix_priority + 2)) $postfix_update_every
-DIMENSION size '' absolute 1 1
-EOF
-
-	return 0
-}
-
-postfix_update() {
-	# the first argument to this function is the microseconds since last update
-	# pass this parameter to the BEGIN statement (see bellow).
-
-	# do all the work to collect / calculate the values
-	# for each dimension
-	# remember: KEEP IT SIMPLE AND SHORT
-
-	# 1. execute postqueue -p
-	# 2. get the line that begins with --
-	# 3. match the 2 numbers on the line and output 2 lines like these:
-	#    local postfix_q_size=NUMBER
-	#    local postfix_q_emails=NUMBER
-	# 4. then execute this a script with the eval
-	#
-	# be very carefull with eval:
-	# prepare the script and always egrep at the end the lines that are usefull, so that
-	# even if something goes wrong, no other code can be executed
-	postfix_q_emails=0
-	postfix_q_size=0
-
-	eval "$(run "$postfix_postqueue" -p |
-		grep "^--" |
-		sed -e "s/-- \([0-9]\+\) Kbytes in \([0-9]\+\) Requests.$/local postfix_q_size=\1\nlocal postfix_q_emails=\2/g" |
-		grep -E "^local postfix_q_(emails|size)=[0-9]+$")"
-
-	# write the result of the work.
-	cat <<VALUESEOF
-BEGIN postfix_local.qemails $1
-SET emails = $postfix_q_emails
-END
-BEGIN postfix_local.qsize $1
-SET size = $postfix_q_size
-END
-VALUESEOF
-
-	return 0
-}
diff --git a/collectors/charts.d.plugin/postfix/postfix.conf b/collectors/charts.d.plugin/postfix/postfix.conf
deleted file mode 100644
index b77817bd6..000000000
--- a/collectors/charts.d.plugin/postfix/postfix.conf
+++ /dev/null
@@ -1,25 +0,0 @@
-# no need for shebang - this file is loaded from charts.d.plugin
-
-# netdata
-# real-time performance and health monitoring, done right!
-# (C) 2018 Costa Tsaousis <costa@tsaousis.gr>
-# GPL v3+
-
-# THIS PLUGIN IS DEPRECATED
-# USE THE PYTHON.D ONE
-
-# the postqueue command
-# if empty, it will use the one found in the system path
-#postfix_postqueue=
-
-# the data collection frequency
-# if unset, will inherit the netdata update frequency
-#postfix_update_every=15
-
-# the charts priority on the dashboard
-#postfix_priority=60000
-
-# the number of retries to do in case of failure
-# before disabling the module
-#postfix_retries=10
-
diff --git a/collectors/charts.d.plugin/sensors/README.md b/collectors/charts.d.plugin/sensors/README.md
index a3fa9d20f..cee3f601c 100644
--- a/collectors/charts.d.plugin/sensors/README.md
+++ b/collectors/charts.d.plugin/sensors/README.md
@@ -1,7 +1,12 @@
-# sensors
+<!--
+title: "Linux machine sensors monitoring with Netdata"
+custom_edit_url: https://github.com/netdata/netdata/edit/master/collectors/charts.d.plugin/sensors/README.md
+-->
+
+# Linux machine sensors monitoring with Netdata
 
 > THIS MODULE IS OBSOLETE.
-> USE [THE PYTHON ONE](../../python.d.plugin/sensors) - IT SUPPORTS MULTIPLE JOBS AND IT IS MORE EFFICIENT
+> USE [THE PYTHON ONE](/collectors/python.d.plugin/sensors) - IT SUPPORTS MULTIPLE JOBS AND IT IS MORE EFFICIENT
 >
 > Unlike the python one, this module can collect temperature on RPi.
 
@@ -24,9 +29,17 @@ The plugin will create Netdata charts for:
 
 One chart for every sensor chip found and each of the above will be created.
 
-## configuration
+## Configuration
+
+Edit the `charts.d/sensors.conf` configuration file using `edit-config` from the Netdata [config
+directory](/docs/configure/nodes.md), which is typically at `/etc/netdata`.
+
+```bash
+cd /etc/netdata   # Replace this path with your Netdata config directory, if different
+sudo ./edit-config charts.d/sensors.conf
+```
 
-This is the internal default for `/etc/netdata/sensors.conf`
+This is the internal default for `charts.d/sensors.conf`
 
 ```sh
 # the directory the kernel keeps sensor data
diff --git a/collectors/charts.d.plugin/squid/Makefile.inc b/collectors/charts.d.plugin/squid/Makefile.inc
deleted file mode 100644
index ad470d88c..000000000
--- a/collectors/charts.d.plugin/squid/Makefile.inc
+++ /dev/null
@@ -1,13 +0,0 @@
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-# THIS IS NOT A COMPLETE Makefile
-# IT IS INCLUDED BY ITS PARENT'S Makefile.am
-# IT IS REQUIRED TO REFERENCE ALL FILES RELATIVE TO THE PARENT
-
-# install these files
-dist_charts_DATA       += squid/squid.chart.sh
-dist_chartsconfig_DATA += squid/squid.conf
-
-# do not install these files, but include them in the distribution
-dist_noinst_DATA       += squid/README.md squid/Makefile.inc
-
diff --git a/collectors/charts.d.plugin/squid/README.md b/collectors/charts.d.plugin/squid/README.md
deleted file mode 100644
index 831a04f73..000000000
--- a/collectors/charts.d.plugin/squid/README.md
+++ /dev/null
@@ -1,67 +0,0 @@
-# squid
-
-> THIS MODULE IS OBSOLETE.
-> USE [THE PYTHON ONE](../../python.d.plugin/squid) - IT SUPPORTS MULTIPLE JOBS AND IT IS MORE EFFICIENT
-
-The plugin will monitor a squid server.
-
-It will produce 4 charts:
-
-1.  **Squid Client Bandwidth** in kbps
-
--   in
--   out
--   hits
-
-2.  **Squid Client Requests** in requests/sec
-
--   requests
--   hits
--   errors
-
-3.  **Squid Server Bandwidth** in kbps
-
--   in
--   out
-
-4.  **Squid Server Requests** in requests/sec
-
--   requests
--   errors
-
-## autoconfig
-
-The plugin will by itself detect squid servers running on
-localhost, on ports 3128 or 8080.
-
-It will attempt to download URLs in the form:
-
--   `cache_object://HOST:PORT/counters`
--   `/squid-internal-mgr/counters`
-
-If any succeeds, it will use this.
-
-## configuration
-
-If you need to configure it by hand, create the file
-`/etc/netdata/squid.conf` with the following variables:
-
--   `squid_host=IP` the IP of the squid host
--   `squid_port=PORT` the port the squid is listening
--   `squid_url="URL"` the URL with the statistics to be fetched from squid
--   `squid_timeout=SECONDS` how much time we should wait for squid to respond
--   `squid_update_every=SECONDS` the frequency of the data collection
-
-Example `/etc/netdata/squid.conf`:
-
-```sh
-squid_host=127.0.0.1
-squid_port=3128
-squid_url="cache_object://127.0.0.1:3128/counters"
-squid_timeout=2
-squid_update_every=5
-```
-
----
-
-[![analytics](https://www.google-analytics.com/collect?v=1&aip=1&t=pageview&_s=1&ds=github&dr=https%3A%2F%2Fgithub.com%2Fnetdata%2Fnetdata&dl=https%3A%2F%2Fmy-netdata.io%2Fgithub%2Fcollectors%2Fcharts.d.plugin%2Fsquid%2FREADME&_u=MAC~&cid=5792dfd7-8dc4-476b-af31-da2fdb9f93d2&tid=UA-64295674-3)](<>)
diff --git a/collectors/charts.d.plugin/squid/squid.chart.sh b/collectors/charts.d.plugin/squid/squid.chart.sh
deleted file mode 100644
index ebddb32c6..000000000
--- a/collectors/charts.d.plugin/squid/squid.chart.sh
+++ /dev/null
@@ -1,141 +0,0 @@
-# shellcheck shell=bash disable=SC2154
-# no need for shebang - this file is loaded from charts.d.plugin
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-# netdata
-# real-time performance and health monitoring, done right!
-# (C) 2016 Costa Tsaousis <costa@tsaousis.gr>
-#
-
-squid_host=
-squid_port=
-squid_url=
-squid_update_every=2
-squid_priority=60000
-
-squid_get_stats_internal() {
-	local host="$1" port="$2" url="$3"
-	run squidclient -h "$host" -p "$port" "$url"
-}
-
-squid_get_stats() {
-	squid_get_stats_internal "$squid_host" "$squid_port" "$squid_url"
-}
-
-squid_autodetect() {
-	local host="127.0.0.1" port url x
-
-	for port in 3128 8080; do
-		for url in "cache_object://$host:$port/counters" "/squid-internal-mgr/counters"; do
-			x=$(squid_get_stats_internal "$host" "$port" "$url" | grep client_http.requests)
-			if [ ! -z "$x" ]; then
-				squid_host="$host"
-				squid_port="$port"
-				squid_url="$url"
-				debug "found squid at '$host:$port' with url '$url'"
-				return 0
-			fi
-		done
-	done
-
-	error "cannot find squid running in localhost. Please set squid_url='url' and squid_host='IP' and squid_port='PORT' in $confd/squid.conf"
-	return 1
-}
-
-squid_check() {
-	require_cmd squidclient || return 1
-	require_cmd sed || return 1
-	require_cmd egrep || return 1
-
-	if [ -z "$squid_host" ] || [ -z "$squid_port" ] || [ -z "$squid_url" ]; then
-		squid_autodetect || return 1
-	fi
-
-	# check once if the url works
-	local x
-	x="$(squid_get_stats | grep client_http.requests)"
-	# shellcheck disable=SC2181
-	if [ ! $? -eq 0 ] || [ -z "$x" ]; then
-		error "cannot fetch URL '$squid_url' by connecting to $squid_host:$squid_port. Please set squid_url='url' and squid_host='host' and squid_port='port' in $confd/squid.conf"
-		return 1
-	fi
-
-	return 0
-}
-
-squid_create() {
-	# create the charts
-	cat <<EOF
-CHART squid_local.clients_net '' "Squid Client Bandwidth" "kilobits / sec" clients squid.clients.net area $((squid_priority + 1)) $squid_update_every
-DIMENSION client_http_kbytes_in in incremental 8 1
-DIMENSION client_http_kbytes_out out incremental -8 1
-DIMENSION client_http_hit_kbytes_out hits incremental -8 1
-
-CHART squid_local.clients_requests '' "Squid Client Requests" "requests / sec" clients squid.clients.requests line $((squid_priority + 3)) $squid_update_every
-DIMENSION client_http_requests requests incremental 1 1
-DIMENSION client_http_hits hits incremental 1 1
-DIMENSION client_http_errors errors incremental -1 1
-
-CHART squid_local.servers_net '' "Squid Server Bandwidth" "kilobits / sec" servers squid.servers.net area $((squid_priority + 2)) $squid_update_every
-DIMENSION server_all_kbytes_in in incremental 8 1
-DIMENSION server_all_kbytes_out out incremental -8 1
-
-CHART squid_local.servers_requests '' "Squid Server Requests" "requests / sec" servers squid.servers.requests line $((squid_priority + 4)) $squid_update_every
-DIMENSION server_all_requests requests incremental 1 1
-DIMENSION server_all_errors errors incremental -1 1
-EOF
-
-	return 0
-}
-
-squid_update() {
-	# the first argument to this function is the microseconds since last update
-	# pass this parameter to the BEGIN statement (see bellow).
-
-	# do all the work to collect / calculate the values
-	# for each dimension
-	# remember: KEEP IT SIMPLE AND SHORT
-
-	# 1. get the counters page from squid
-	# 2. sed to remove spaces; replace . with _; remove spaces around =; prepend each line with: local squid_
-	# 3. egrep lines starting with:
-	#    local squid_client_http_ then one or more of these a-z 0-9 _ then = and one of more of 0-9
-	#    local squid_server_all_ then one or more of these a-z 0-9 _ then = and one of more of 0-9
-	# 4. then execute this as a script with the eval
-	#
-	# be very carefull with eval:
-	# prepare the script and always grep at the end the lines that are usefull, so that
-	# even if something goes wrong, no other code can be executed
-
-	# shellcheck disable=SC1117
-	eval "$(squid_get_stats |
-		sed -e "s/ \+/ /g" -e "s/\./_/g" -e "s/^\([a-z0-9_]\+\) *= *\([0-9]\+\)$/local squid_\1=\2/g" |
-		grep -E "^local squid_(client_http|server_all)_[a-z0-9_]+=[0-9]+$")"
-
-	# write the result of the work.
-	cat <<VALUESEOF
-BEGIN squid_local.clients_net $1
-SET client_http_kbytes_in = $squid_client_http_kbytes_in
-SET client_http_kbytes_out = $squid_client_http_kbytes_out
-SET client_http_hit_kbytes_out = $squid_client_http_hit_kbytes_out
-END
-
-BEGIN squid_local.clients_requests $1
-SET client_http_requests = $squid_client_http_requests
-SET client_http_hits = $squid_client_http_hits
-SET client_http_errors = $squid_client_http_errors
-END
-
-BEGIN squid_local.servers_net $1
-SET server_all_kbytes_in = $squid_server_all_kbytes_in
-SET server_all_kbytes_out = $squid_server_all_kbytes_out
-END
-
-BEGIN squid_local.servers_requests $1
-SET server_all_requests = $squid_server_all_requests
-SET server_all_errors = $squid_server_all_errors
-END
-VALUESEOF
-
-	return 0
-}
diff --git a/collectors/charts.d.plugin/squid/squid.conf b/collectors/charts.d.plugin/squid/squid.conf
deleted file mode 100644
index 19e928f25..000000000
--- a/collectors/charts.d.plugin/squid/squid.conf
+++ /dev/null
@@ -1,26 +0,0 @@
-# no need for shebang - this file is loaded from charts.d.plugin
-
-# netdata
-# real-time performance and health monitoring, done right!
-# (C) 2018 Costa Tsaousis <costa@tsaousis.gr>
-# GPL v3+
-
-# THIS PLUGIN IS DEPRECATED
-# USE THE PYTHON.D ONE
-
-#squid_host=
-#squid_port=
-#squid_url=
-#squid_timeout=2
-
-# the data collection frequency
-# if unset, will inherit the netdata update frequency
-#squid_update_every=2
-
-# the charts priority on the dashboard
-#squid_priority=60000
-
-# the number of retries to do in case of failure
-# before disabling the module
-#squid_retries=10
-
diff --git a/collectors/charts.d.plugin/tomcat/Makefile.inc b/collectors/charts.d.plugin/tomcat/Makefile.inc
deleted file mode 100644
index ef05b1953..000000000
--- a/collectors/charts.d.plugin/tomcat/Makefile.inc
+++ /dev/null
@@ -1,13 +0,0 @@
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-# THIS IS NOT A COMPLETE Makefile
-# IT IS INCLUDED BY ITS PARENT'S Makefile.am
-# IT IS REQUIRED TO REFERENCE ALL FILES RELATIVE TO THE PARENT
-
-# install these files
-dist_charts_DATA       += tomcat/tomcat.chart.sh
-dist_chartsconfig_DATA += tomcat/tomcat.conf
-
-# do not install these files, but include them in the distribution
-dist_noinst_DATA       += tomcat/README.md tomcat/Makefile.inc
-
diff --git a/collectors/charts.d.plugin/tomcat/README.md b/collectors/charts.d.plugin/tomcat/README.md
deleted file mode 100644
index 752332cfb..000000000
--- a/collectors/charts.d.plugin/tomcat/README.md
+++ /dev/null
@@ -1,6 +0,0 @@
-# tomcat
-
-> THIS MODULE IS OBSOLETE.
-> USE [THE PYTHON ONE](../../python.d.plugin/tomcat) - IT SUPPORTS MULTIPLE JOBS AND IT IS MORE EFFICIENT
-
-[![analytics](https://www.google-analytics.com/collect?v=1&aip=1&t=pageview&_s=1&ds=github&dr=https%3A%2F%2Fgithub.com%2Fnetdata%2Fnetdata&dl=https%3A%2F%2Fmy-netdata.io%2Fgithub%2Fcollectors%2Fcharts.d.plugin%2Ftomcat%2FREADME&_u=MAC~&cid=5792dfd7-8dc4-476b-af31-da2fdb9f93d2&tid=UA-64295674-3)](<>)
diff --git a/collectors/charts.d.plugin/tomcat/tomcat.chart.sh b/collectors/charts.d.plugin/tomcat/tomcat.chart.sh
deleted file mode 100644
index 9ca75e63e..000000000
--- a/collectors/charts.d.plugin/tomcat/tomcat.chart.sh
+++ /dev/null
@@ -1,152 +0,0 @@
-# shellcheck shell=bash
-# no need for shebang - this file is loaded from charts.d.plugin
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-# netdata
-# real-time performance and health monitoring, done right!
-# (C) 2016 Costa Tsaousis <costa@tsaousis.gr>
-#
-# Contributed by @jgeromero with PR #277
-
-# Description: Tomcat netdata charts.d plugin
-# Author: Jorge Romero
-
-# the URL to download tomcat status info
-# usually http://localhost:8080/manager/status?XML=true
-tomcat_url=""
-tomcat_curl_opts=""
-
-# set tomcat username/password here
-tomcat_user=""
-tomcat_password=""
-
-# _update_every is a special variable - it holds the number of seconds
-# between the calls of the _update() function
-tomcat_update_every=
-
-tomcat_priority=60000
-
-# convert tomcat floating point values
-# to integer using this multiplier
-# this only affects precision - the values
-# will be in the proper units
-tomcat_decimal_detail=1000000
-
-# used by volume chart to convert bytes to kB
-tomcat_decimal_kB_detail=1000
-
-tomcat_check() {
-
-	require_cmd xmlstarlet || return 1
-
-	# check if url, username, passwords are set
-	if [ -z "${tomcat_url}" ]; then
-		error "tomcat url is unset or set to the empty string"
-		return 1
-	fi
-	if [ -z "${tomcat_user}" ]; then
-		# check backwards compatibility
-		# shellcheck disable=SC2154
-		if [ -z "${tomcatUser}" ]; then
-			error "tomcat user is unset or set to the empty string"
-			return 1
-		else
-			tomcat_user="${tomcatUser}"
-		fi
-	fi
-	if [ -z "${tomcat_password}" ]; then
-		# check backwards compatibility
-		# shellcheck disable=SC2154
-		if [ -z "${tomcatPassword}" ]; then
-			error "tomcat password is unset or set to the empty string"
-			return 1
-		else
-			tomcat_password="${tomcatPassword}"
-		fi
-	fi
-
-	# check if we can get to tomcat's status page
-	tomcat_get
-	# shellcheck disable=2181
-	if [ $? -ne 0 ]; then
-		error "cannot get to status page on URL '${tomcat_url}'. Please make sure tomcat url, username and password are correct."
-		return 1
-	fi
-
-	# this should return:
-	#  - 0 to enable the chart
-	#  - 1 to disable the chart
-
-	return 0
-}
-
-tomcat_get() {
-	# collect tomcat values
-	tomcat_port="$(
-		IFS=/ read -ra a <<<"$tomcat_url"
-		hostport=${a[2]}
-		echo "${hostport#*:}"
-	)"
-	mapfile -t lines < <(run curl -u "$tomcat_user":"$tomcat_password" -Ss ${tomcat_curl_opts} "$tomcat_url" |
-		run xmlstarlet sel \
-			-t -m "/status/jvm/memory" -v @free \
-			-n -m "/status/connector[@name='\"http-bio-$tomcat_port\"']/threadInfo" -v @currentThreadCount \
-			-n -v @currentThreadsBusy \
-			-n -m "/status/connector[@name='\"http-bio-$tomcat_port\"']/requestInfo" -v @requestCount \
-			-n -v @bytesSent -n -)
-
-	tomcat_jvm_freememory="${lines[0]}"
-	tomcat_threads="${lines[1]}"
-	tomcat_threads_busy="${lines[2]}"
-	tomcat_accesses="${lines[3]}"
-	tomcat_volume="${lines[4]}"
-
-	return 0
-}
-
-# _create is called once, to create the charts
-tomcat_create() {
-	cat <<EOF
-CHART tomcat.accesses '' "tomcat requests" "requests/s" statistics tomcat.accesses area $((tomcat_priority + 8)) $tomcat_update_every
-DIMENSION accesses '' incremental
-CHART tomcat.volume '' "tomcat volume" "kB/s" volume tomcat.volume area $((tomcat_priority + 5)) $tomcat_update_every
-DIMENSION volume '' incremental divisor ${tomcat_decimal_kB_detail}
-CHART tomcat.threads '' "tomcat threads" "current threads" statistics tomcat.threads line $((tomcat_priority + 6)) $tomcat_update_every
-DIMENSION current '' absolute 1
-DIMENSION busy '' absolute 1
-CHART tomcat.jvm '' "JVM Free Memory" "MB" statistics tomcat.jvm area $((tomcat_priority + 8)) $tomcat_update_every
-DIMENSION jvm '' absolute 1 ${tomcat_decimal_detail}
-EOF
-	return 0
-}
-
-# _update is called continuously, to collect the values
-tomcat_update() {
-	# the first argument to this function is the microseconds since last update
-	# pass this parameter to the BEGIN statement (see bellow).
-
-	# do all the work to collect / calculate the values
-	# for each dimension
-	# remember: KEEP IT SIMPLE AND SHORT
-
-	tomcat_get || return 1
-
-	# write the result of the work.
-	cat <<VALUESEOF
-BEGIN tomcat.accesses $1
-SET accesses = $((tomcat_accesses))
-END
-BEGIN tomcat.volume $1
-SET volume = $((tomcat_volume))
-END
-BEGIN tomcat.threads $1
-SET current = $((tomcat_threads))
-SET busy = $((tomcat_threads_busy))
-END
-BEGIN tomcat.jvm $1
-SET jvm = $((tomcat_jvm_freememory))
-END
-VALUESEOF
-
-	return 0
-}
diff --git a/collectors/charts.d.plugin/tomcat/tomcat.conf b/collectors/charts.d.plugin/tomcat/tomcat.conf
deleted file mode 100644
index e9f3eefa9..000000000
--- a/collectors/charts.d.plugin/tomcat/tomcat.conf
+++ /dev/null
@@ -1,38 +0,0 @@
-# no need for shebang - this file is loaded from charts.d.plugin
-
-# netdata
-# real-time performance and health monitoring, done right!
-# (C) 2018 Costa Tsaousis <costa@tsaousis.gr>
-# GPL v3+
-
-# THIS PLUGIN IS DEPRECATED
-# USE THE PYTHON.D ONE
-
-# the URL to download tomcat status info
-# usually http://localhost:8080/manager/status?XML=true
-#tomcat_url=""
-#tomcat_curl_opts=""
-
-# set tomcat username/password here
-#tomcat_user=""
-#tomcat_password=""
-
-# the data collection frequency
-# if unset, will inherit the netdata update frequency
-#tomcat_update_every=1
-
-# the charts priority on the dashboard
-#tomcat_priority=60000
-
-# the number of retries to do in case of failure
-# before disabling the module
-#tomcat_retries=10
-
-# convert tomcat floating point values
-# to integer using this multiplier
-# this only affects precision - the values
-# will be in the proper units
-#tomcat_decimal_detail=1000000
-
-# used by volume chart to convert bytes to KB
-#tomcat_decimal_KB_detail=1000