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-rw-r--r--collectors/charts.d.plugin/squid/squid.chart.sh141
1 files changed, 141 insertions, 0 deletions
diff --git a/collectors/charts.d.plugin/squid/squid.chart.sh b/collectors/charts.d.plugin/squid/squid.chart.sh
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+# 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
+}