Munin contributed plugins

#!/bin/bash

#

#healthcheck on munin

#egrep system log and alert.

#

#programed by rti (hiroyuki fujie) super.rti@gmail.com @super_rti

#LICENSE: NYSL (public domain)

#

#

#config file

#      /etc/munin/plugin-conf.d/munin-node

#

#example minimum config

#---------------------------------------------------

#[healthcheck_log]

#user root

#env.log_1  /var/log/messages

#---------------------------------------------------

#

#check two log

#---------------------------------------------------

#[healthcheck_log]

#user root

#env.log_1  /var/log/messages

#env.log_2  /var/log/syslog

#---------------------------------------------------

#

#check two three

#---------------------------------------------------

#[healthcheck_log]

#user root

#env.log_1  /var/log/messages

#env.log_2  /var/log/syslog

#env.log_3  /var/log/dmesg

#---------------------------------------------------

#

#set name

#---------------------------------------------------

#[healthcheck_log]

#user root

#env.log_1  /var/log/messages

#env.name_1 my_server_messages

#---------------------------------------------------

#

#set egrep string

#---------------------------------------------------

#[healthcheck_log]

#user root

#env.log_1  /var/log/messages

#env.grep_1 alert|warning

#---------------------------------------------------

#

#set egrep string

#---------------------------------------------------

#[healthcheck_log]

#user root

#env.log_1  /var/log/messages

#env.grep_1 alert|warning

#---------------------------------------------------

#

#full option

#/etc/munin/plugin-conf.d/munin-node

#---------------------------------------------------

#[healthcheck_log]

#user root                          #log file is read only root user.

#env.log_1  /var/log/messages       #target log filename

#env.grep_1 critical|error          #egrep string.

                                    #default by critical|error|warning|crash|fatal|kernel

#---------------------------------------------------

#

#edakari speed up.

CHECKMAX=`env | grep log_ | wc -l`

let CHECKMAX="$CHECKMAX + 1"

MINUTE_BY_GREP_RANGE=10

if [ "$1" = "autoconf" ]; then

    if [ $CHECKMAX -le 1 ]; then

         echo no

         exit 1

    fi

    echo yes

    exit 0

fi

if [ "$1" = "config" ]; then

    echo 'graph_title log grep (match count)'

    echo "graph_args --base 1000 -l 0 --vertical-label match_count"

    echo 'graph_scale no'

    echo 'graph_vlabel match_count'

    echo 'graph_category other'

    echo 'graph_info This graph shows the bad event count on log'

    for(( I = 1; I < $CHECKMAX; ++I ))

    do

         eval log=\$log_${I}

         eval name=\$name_${I}

         eval grep=\$grep_${I}

         if [ "x${log}" = "x" ]; then

              continue

         fi

         if [ "x${name}" = "x" ]; then

             name=`echo $log | sed 's#[/|\.]#_#g'`

         fi

         if [ "x${name}" = "x" ]; then

             grep="critical|error|crash|fatal|kernel"

         fi

         echo "$name.label $name"

         echo "$name.info egrep $grep $log | wc -l"

         echo "$name.draw LINE2"

         echo "$name.min 0"

         echo "$name.max 20"

         echo "$name.critical 0:0"

    done

    exit 0

fi

NOWTIME=`date --date "$MINUTE_BY_GREP_RANGE minute ago" +%s`

for(( I = 1; I < $CHECKMAX; ++I ))

do

    eval log=\$log_${I}

    eval name=\$name_${I}

    eval grep=\$grep_${I}

    if [ "x${log}" = "x" ]; then

         continue

    fi

    if [ "x${name}" = "x" ]; then

         name=`echo $log | sed 's#[/|\.]#_#g'`

    fi

    if [ "x${grep}" = "x" ]; then

         grep="critical|error|crash|fatal|kernel"

    fi

    COUNT=0

    MESSAGE=

    IFS=$'\n'

    MATCHLINES=(`egrep -i "$grep" "$log"`)

    for(( N = ${#MATCHLINES[@]} - 1; N >= 0 ; --N ))

    do

         LINE=${MATCHLINES[$N]}

         DATESTRING=`echo $LINE | awk '{ printf("%s %s %s",$1,$2,$3)}'`

         LOGTIME=`date --date "$DATESTRING" +%s`

         if [ $LOGTIME -lt $NOWTIME ]; then

               break

         fi

         let COUNT="$COUNT + 1"

         MESSAGE="$MESSAGE$LINE //@LINE@// "

    done

    if [ $COUNT -eq 0 ]; then

        echo "${name}.value 0"

    else

        echo "${name}.value ${COUNT}"

        echo "${name}.extinfo ${MESSAGE}"

    fi

done