muninlite/muninlite.in
Lars Kruse 829f230b9b CHange default plugin directory to /etc/munin/plugins
This path is also used by the official `munin-node` implementation.
2020-02-09 00:45:59 +01:00

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#!/bin/sh
#
# Simple Bourne Shell script that implements Munin protocoll and
# some common Linux plugins.
#
# For latest version, see http://muninlite.sf.net/
#
# Copyright (c) 2007-2011 Rune Nordbøe Skillingstad <rune@skillingstad.no>
#
# Licensed under GPLv2 (see LICENSE file for full License)
#
VERSION="@@VERSION@@"
set -eu
@@CONF@@
# if plugindir_ is present in $PLUGINS, executables (scripts, binaries) in the specified path
# and matching the pattern will be scanned and operated as plugins
PLUGIN_DIRECTORY=/etc/munin/plugins
PLUGINPATTERN="*"
# Remove unwanted plugins from this list
PLUGINS="@@PLUGINS@@"
# ===== LIB FUNCTIONS =====
clean_fieldname() {
echo "$@" | sed -e 's/^[^A-Za-z_]/_/' -e 's/[^A-Za-z0-9_]/_/g'
}
# ===== PLUGINS CODE =====
@@PLSTR@@
# ===== NODE CODE =====
do_list() {
echo "$PLUGINS"
}
do_nodes() {
echo "$HOSTNAME"
echo "."
}
do_config() {
if echo "$PLUGINS" | grep -qwF "$1"; then
"config_$1"
else
echo "# Unknown service"
fi
echo "."
}
do_fetch() {
if echo "$PLUGINS" | grep -qwF "$1"; then
"fetch_$1"
else
echo "# Unknown service"
fi
echo "."
}
do_version() {
echo "munins node on $HOSTNAME version: $VERSION (muninlite)"
}
do_quit() {
exit 0
}
# ===== Runtime config =====
RES=""
for PLUG in $PLUGINS; do
case "$PLUG" in
if_|if_err_)
interface_names=$(grep -E '^ *(ppp|eth|wlan|ath|ra|ipsec|tap|br-)[^:]{1,}:' /proc/net/dev | sed 's/^ *//; s/:.*$//')
for INTER in $interface_names; do
INTERRES=$(echo "$INTER" | sed -e 's/\./VLAN/' -e 's/\-/_/')
RES="$RES ${PLUG}${INTERRES}"
eval "fetch_${PLUG}${INTERRES}() { 'fetch_${PLUG%_}' '$INTER'; }"
eval "config_${PLUG}${INTERRES}() { 'config_${PLUG%_}' '$INTER'; }"
done
;;
netstat)
if netstat -s >/dev/null 2>&1; then
RES="$RES netstat"
fi
;;
plugindir_)
for MYPLUGIN in $(if [ -d "$PLUGIN_DIRECTORY" ]; then find -L "$PLUGIN_DIRECTORY" -type f -name "$PLUGINPATTERN"; fi); do
if [ -f "$MYPLUGIN" ] && [ -x "$MYPLUGIN" ]; then
MYPLUGINNAME=$(basename "$MYPLUGIN")
# detect and avoid name collision
if echo "$RES" | grep -qwF "$MYPLUGINNAME"; then
MYPLUGINNAME="plugindir_$MYPLUGINNAME"
fi
RES="$RES $MYPLUGINNAME"
eval "fetch_${MYPLUGINNAME}() { '$MYPLUGIN'; }"
eval "config_${MYPLUGINNAME}() { '$MYPLUGIN' config; }"
fi
done
;;
*)
RES="$RES $PLUG"
;;
esac
done
# sort plugin names and remove surrounding whitespace
PLUGINS=$(echo "$RES" | xargs -r -n 1 echo | sort | xargs echo)
# ===== MAIN LOOP =====
FUNCTIONS="list nodes config fetch version quit"
HOSTNAME=$( { hostname -f || hostname || cat /proc/sys/kernel/hostname || echo "unknown"; } 2>/dev/null )
echo "# munin node at $HOSTNAME"
while read -r arg0 arg1
do
arg0=$(echo "$arg0" | xargs)
arg1=$(echo "$arg1" | xargs)
if ! echo "$FUNCTIONS" | grep -qwF "$arg0"; then
echo "# Unknown command. Try $(echo "$FUNCTIONS" | sed -e 's/\( [[:alpha:]]\{1,\}\)/,\1/g' -e 's/,\( [[:alpha:]]\{1,\}\)$/ or\1/')"
else
"do_$arg0" "$arg1"
fi
done