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contrib-munin/plugins/other/listeners

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#!/bin/bash
#%# family=manual
#%# capabilities=autoconf
# this munin plugin monitors the icecast server specified in RADIO. for each stream,
# the stream name, number of current listeners, and peak number of listeners are
# passed to munin.
# dependencies on external program: (either program or program combination will work):
# dog + html2text
# curl + html2text
# wget + html2text
# links
# lynx
# yyyy/mm/dd v author changelog:
# 2008/01/15 v0.02 Lothar Schmidt added alternetive retrievers, stream name substitution
# 2008/01/15 v0.01 Lothar Schmidt initial version, email: l.make.a.noise.here@scarydevilmonastery.net
# ----------------------------------------------------------------------------------
#
# CONFIGURATION DEPARTMENT
#
# ----------------------------------------------------------------------------------
#RADIO="http://localhost:8000" # query this server on this port
RADIO="http://scarydevilmonastery.net:8000"
STYLE=LINE2 # graph style for number of listeners
PEAKSTYLE=LINE # graph style for peak listeners
GRAPH="listeners" # graph name, labels
SECTION="Trial" # graph section
# stream name substitution. stream name left of = will use description right of = for labels
stream1="No Noise No Fun"
stream2="Radio Sueno"
stream3="Don't Panic"
stream4="Project Bluebird"
# fetch and render status info, choose one. top to bottom order of my personal preference.
# chose exactly one.
retriever() {
dog $RADIO | html2text -nobs # using dog and html2text
# curl $RADIO 2>/dev/null|html2text -nobs # using curl and html2text
# wget -qFO - $RADIO | html2text -nobs # using wget and html2text
# links -dump $RADIO # using links
# lynx -dump $RADIO # using lynx
}
# -------------------------------------------------------------------------------------
# --- retrieve stream name, listeners and peak listeners from server ---
STREAMS=( $( retriever | sed -n 's/^ *\(Stream URL\|Current Listeners\|Peak Listeners\): *//p' ) )
LASTSTREAM=${#STREAMS[*]}
# --- check whether any stream found ---
run_autoconf() {
if (( $LASTSTREAM )) ; then echo yes ; exit 0 ; fi # found streams
echo U ; exit 1 ; } # no radio or streams
#--- guess ---
run_config() {
cat << EOF
graph_title ${GRAPH}
graph_category ${SECTION}
graph_args --base 1000 -l 0
graph_vlabel ${GRAPH}
EOF
for (( I=2 ; I<LASTSTREAM ; I+=3 )) ; do
STREAM="${STREAMS[I]##*/}" # stream name
STREAMNAME="${!STREAM:-$STREAM}" # substitute against our own desciption, if available
cat << EOF
${STREAM}.label $STREAMNAME
${STREAM}.draw $STYLE
${STREAM}.info $STREAMNAME
${STREAM}peak.label $STREAMNAME peak
${STREAM}peak.draw $PEAKSTYLE
${STREAM}peak.info $STREAMNAME peak
EOF
done
}
# --- current listeners and peak listeners for each stream ---
run_() {
for (( I=0 ; I<LASTSTREAM ; I+=3 )) ; do
STREAM="${STREAMS[I+2]##*/}"
echo ${STREAM}.value ${STREAMS[I]}
echo ${STREAM}peak.value ${STREAMS[I+1]}
done
}
# plugin entry point:
run_$1
# for Munin Plugin Gallery
# graph_category streaming