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