diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 14:31:17 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 14:31:17 +0000 |
commit | 8020f71afd34d7696d7933659df2d763ab05542f (patch) | |
tree | 2fdf1b5447ffd8bdd61e702ca183e814afdcb4fc /collectors/charts.d.plugin/libreswan | |
parent | Initial commit. (diff) | |
download | netdata-8020f71afd34d7696d7933659df2d763ab05542f.tar.xz netdata-8020f71afd34d7696d7933659df2d763ab05542f.zip |
Adding upstream version 1.37.1.upstream/1.37.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'collectors/charts.d.plugin/libreswan')
-rw-r--r-- | collectors/charts.d.plugin/libreswan/Makefile.inc | 13 | ||||
-rw-r--r-- | collectors/charts.d.plugin/libreswan/README.md | 56 | ||||
-rw-r--r-- | collectors/charts.d.plugin/libreswan/libreswan.chart.sh | 187 | ||||
-rw-r--r-- | collectors/charts.d.plugin/libreswan/libreswan.conf | 29 |
4 files changed, 285 insertions, 0 deletions
diff --git a/collectors/charts.d.plugin/libreswan/Makefile.inc b/collectors/charts.d.plugin/libreswan/Makefile.inc new file mode 100644 index 0000000..af767d0 --- /dev/null +++ b/collectors/charts.d.plugin/libreswan/Makefile.inc @@ -0,0 +1,13 @@ +# 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 += libreswan/libreswan.chart.sh +dist_chartsconfig_DATA += libreswan/libreswan.conf + +# do not install these files, but include them in the distribution +dist_noinst_DATA += libreswan/README.md libreswan/Makefile.inc + diff --git a/collectors/charts.d.plugin/libreswan/README.md b/collectors/charts.d.plugin/libreswan/README.md new file mode 100644 index 0000000..41c4e24 --- /dev/null +++ b/collectors/charts.d.plugin/libreswan/README.md @@ -0,0 +1,56 @@ +<!-- +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" +--> + +# 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**: + +1. **Uptime** + +- the uptime of the tunnel + +2. **Traffic** + +- bytes in +- bytes out + +## 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`. + +```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: + +```sh +ipsec whack --status +ipsec whack --trafficstatus +``` + +The first command is used to extract the currently established tunnels, their IDs and their names. +The second command is used to extract the current uptime and traffic. + +Most probably user `netdata` will not be able to query libreswan, so the `ipsec` commands will be denied. +The plugin attempts to run `ipsec` as `sudo ipsec ...`, to get access to libreswan statistics. + +To allow user `netdata` execute `sudo ipsec ...`, create the file `/etc/sudoers.d/netdata` with this content: + +``` +netdata ALL = (root) NOPASSWD: /sbin/ipsec whack --status +netdata ALL = (root) NOPASSWD: /sbin/ipsec whack --trafficstatus +``` + +Make sure the path `/sbin/ipsec` matches your setup (execute `which ipsec` to find the right path). + +--- + + diff --git a/collectors/charts.d.plugin/libreswan/libreswan.chart.sh b/collectors/charts.d.plugin/libreswan/libreswan.chart.sh new file mode 100644 index 0000000..d526f7a --- /dev/null +++ b/collectors/charts.d.plugin/libreswan/libreswan.chart.sh @@ -0,0 +1,187 @@ +# 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) 2018 Costa Tsaousis <costa@tsaousis.gr> +# + +# _update_every is a special variable - it holds the number of seconds +# between the calls of the _update() function +libreswan_update_every=1 + +# the priority is used to sort the charts on the dashboard +# 1 = the first chart +libreswan_priority=90000 + +# set to 1, to run ipsec with sudo +libreswan_sudo=1 + +# global variables to store our collected data + +# [TUNNELID] = TUNNELNAME +# here we track the *latest* established tunnels +# as detected by: ipsec whack --status +declare -A libreswan_connected_tunnels=() + +# [TUNNELID] = VALUE +# here we track values of all established tunnels (not only the latest) +# as detected by: ipsec whack --trafficstatus +declare -A libreswan_traffic_in=() +declare -A libreswan_traffic_out=() +declare -A libreswan_established_add_time=() + +# [TUNNELNAME] = CHARTID +# here we remember CHARTIDs of all tunnels +# 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 +} + +# 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]\+ #\([0-9]\+\): \"\(.*\)\",\{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 + [ ${#libreswan_connected_tunnels[@]} -eq 0 ] && return 1 + + return 0 +} + +# _check is called once, to find out if this chart should be enabled or not +libreswan_check() { + # this should return: + # - 0 to enable the chart + # - 1 to disable the chart + + require_cmd ipsec || return 1 + + # make sure it is libreswan + # shellcheck disable=SC2143 + if [ -z "$(ipsec --version | grep -i libreswan)" ]; then + error "ipsec command is not Libreswan. Disabling Libreswan plugin." + return 1 + fi + + if [ ${libreswan_sudo} -ne 0 ] && ! is_able_sudo_ipsec; then + error "not enough permissions to execute ipsec with sudo. Disabling Libreswan plugin." + return 1 + fi + + # check that we can collect data + libreswan_get || return 1 + + return 0 +} + +# create the charts for an ipsec tunnel +libreswan_create_one() { + local n="${1}" name + + name="${libreswan_connected_tunnels[${n}]}" + + [ -n "${libreswan_tunnel_charts[${name}]}" ] && return 0 + + libreswan_tunnel_charts[${name}]="$(fixid "${name}")" + + cat << EOF +CHART libreswan.${libreswan_tunnel_charts[${name}]}_net '${name}_net' "LibreSWAN Tunnel ${name} Traffic" "kilobits/s" "${name}" libreswan.net area $((libreswan_priority)) $libreswan_update_every '' '' 'libreswan' +DIMENSION in '' incremental 8 1000 +DIMENSION out '' incremental -8 1000 +CHART libreswan.${libreswan_tunnel_charts[${name}]}_uptime '${name}_uptime' "LibreSWAN Tunnel ${name} Uptime" "seconds" "${name}" libreswan.uptime line $((libreswan_priority + 1)) $libreswan_update_every '' '' 'libreswan' +DIMENSION uptime '' absolute 1 1 +EOF + + return 0 + +} + +# _create is called once, to create the charts +libreswan_create() { + local n + for n in "${!libreswan_connected_tunnels[@]}"; do + libreswan_create_one "${n}" + done + return 0 +} + +libreswan_now=$(date +%s) + +# send the values to netdata for an ipsec tunnel +libreswan_update_one() { + local n="${1}" microseconds="${2}" name id uptime + + name="${libreswan_connected_tunnels[${n}]}" + id="${libreswan_tunnel_charts[${name}]}" + + [ -z "${id}" ] && libreswan_create_one "${name}" + + uptime=$((libreswan_now - libreswan_established_add_time[${n}])) + [ ${uptime} -lt 0 ] && uptime=0 + + # write the result of the work. + cat << VALUESEOF +BEGIN libreswan.${id}_net ${microseconds} +SET in = ${libreswan_traffic_in[${n}]} +SET out = ${libreswan_traffic_out[${n}]} +END +BEGIN libreswan.${id}_uptime ${microseconds} +SET uptime = ${uptime} +END +VALUESEOF +} + +# _update is called continuously, to collect the values +libreswan_update() { + # the first argument to this function is the microseconds since last update + # pass this parameter to the BEGIN statement (see below). + + libreswan_get || return 1 + libreswan_now=$(date +%s) + + local n + for n in "${!libreswan_connected_tunnels[@]}"; do + libreswan_update_one "${n}" "${@}" + done + + return 0 +} diff --git a/collectors/charts.d.plugin/libreswan/libreswan.conf b/collectors/charts.d.plugin/libreswan/libreswan.conf new file mode 100644 index 0000000..9b3ee77 --- /dev/null +++ b/collectors/charts.d.plugin/libreswan/libreswan.conf @@ -0,0 +1,29 @@ +# 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+ +# + +# the data collection frequency +# if unset, will inherit the netdata update frequency +#libreswan_update_every=1 + +# the charts priority on the dashboard +#libreswan_priority=90000 + +# the number of retries to do in case of failure +# before disabling the module +#libreswan_retries=10 + +# set to 1, to run ipsec with sudo (the default) +# set to 0, to run ipsec without sudo +#libreswan_sudo=1 + +# TO ALLOW NETDATA RUN ipsec AS ROOT +# CREATE THE FILE: /etc/sudoers.d/netdata +# WITH THESE 2 LINES (uncommented of course): +# +# netdata ALL = (root) NOPASSWD: /sbin/ipsec whack --status +# netdata ALL = (root) NOPASSWD: /sbin/ipsec whack --trafficstatus |