Munin contributed plugins

#!/bin/sh

set -e

: << =cut

=head1 NAME

coturn_sessions - Simple plugin to monitor sessions on coturn server

=head1 CONFIGURATION

This plugin requires a password set in /etc/turnserver.conf for telnet 

cli access. A telnet client has to be installed. Optionally you can 

specify the port of the cli interface.

[coturn_sessions]

env.password VERYSECUREPASSWORD

env.port PORT

=head1 AUTHOR

Copyright (C) 2020 Sebastian L. (https://momou.ch)

=head1 LICENSE

GPLv2

=head1 MAGIC MARKERS

 #%# family=manual

 #%# capabilities=autoconf

=cut

. "$MUNIN_LIBDIR/plugins/plugin.sh"

cliport=${port:-5766}

clipassword=${password:-}

get_coturn_stats() {

	echo "open 127.0.0.1 $cliport"

	sleep 1

	echo "$clipassword"

	sleep 1

	for i in udp tcp dtls tls

	do

		echo "pu $i"

		sleep 1

	done

}

pick_line() {

    local result

    result=$(echo "$1" | sed -n "$2"p )

    echo "${result:-"U"}"

}

case $1 in

    autoconf)

        if [ -x /usr/bin/turnserver ]; then

            if [ -z "$(command -v telnet)" ]; then

                echo "no (telnet not found)"

                exit 0

            else

                echo "yes"

                exit 0

            fi

        else

            echo "no (/usr/bin/turnserver not found)"

            exit 0

        fi

        ;;

   config)

		echo "graph_title Sessions on coturn server"

		echo "graph_vlabel turn sessions by protocols"

		echo "graph_info This graph shows active sessions sorted by different protocols on the coturn server."

		echo "graph_args --base 1000 --lower-limit 0"

		echo "udp_sessions.label udp sessions"

		echo "udp_sessions.draw AREASTACK"

		echo "udp_sessions.info Current number of udp sessions"

		echo "udp_sessions.min 0"

		echo "tcp_sessions.label tcp sessions"

		echo "tcp_sessions.draw AREASTACK"

		echo "tcp_sessions.info Current number of tcp sessions"

		echo "tcp_sessions.min 0"

		echo "dtls_sessions.label dtls sessions"

		echo "dtls_sessions.draw AREASTACK"

		echo "dtls_sessions.info Current number of dtls sessions"

		echo "dtls_sessions.min 0"

		echo "tls_sessions.label tls sessions"

		echo "tls_sessions.draw AREASTACK"

		echo "tls_sessions.info Current number of tls sessions"

		echo "tls_sessions.min 0"

        exit 0

        ;;

esac

SESSIONS=$(get_coturn_stats | telnet 2> /dev/null | grep "Total sessions: " | sed 's/  Total sessions: //')

echo "udp_sessions.value $(pick_line "$SESSIONS" 1)"

echo "tcp_sessions.value $(pick_line "$SESSIONS" 2)"

echo "dtls_sessions.value $(pick_line "$SESSIONS" 3)"

echo "tls_sessions.value $(pick_line "$SESSIONS" 4)"