Initial commit
This commit is contained in:
Benjamin Renard
commit
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*~
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#!/bin/bash
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#
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# Nagios plugin to check Postgresql streamin replication state
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#
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# Could be use on Master or on standby node
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#
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# Requirement :
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#
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# On master node : Slaves must be able to connect with user PG_USER
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# to database postgres as trust
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#
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# On standby node : PG_USER must be able to connect localy as trust
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#
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# Author : Benjamin Renard <brenard@easter-eggs.com>
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# Date : Wed, 14 Mar 2012 14:45:55 +0000
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# Source : http://git.zionetrix.net/check_pg_streaming_replication
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#
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PG_USER=postgres
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PSQL_BIN=/usr/bin/psql
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PG_MAIN=/var/lib/postgresql/9.1/main
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RECOVERY_CONF=$PG_MAIN/recovery.conf
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PG_DEFAULT_PORT=5432
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DEBUG=0
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[ "$1" == "-d" ] && DEBUG=1
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function psql_get () {
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echo "$1"|su - $PG_USER -c "$PSQL_BIN -t -P format=unaligned"
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}
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function debug() {
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if [ $DEBUG -eq 1 ]
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then
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echo "[DEBUG] $1"
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fi
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}
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# Postgres is running ?
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if [ $DEBUG -eq 0 ]
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then
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psql_get '\q' 2> /dev/null
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else
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psql_get '\q'
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fi
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if [ $? -ne 0 ]
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then
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echo "CRITICAL : Postgres is not running !"
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exit 2
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fi
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debug "Postgres is running"
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RECOVERY_MODE=0
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[ $( psql_get 'SELECT pg_is_in_recovery();' ) == "t" ] && RECOVERY_MODE=1
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if [ -f $RECOVERY_CONF ]
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then
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debug "File recovery.conf found. Hot-standby mode."
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# Check recovery mode
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if [ $RECOVERY_MODE -ne 1 ]
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then
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echo "CRITICAL : Not in recovery mode while recovery.conf file found !"
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exit 2
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fi
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debug "Postgres is in recovery mode"
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LAST_XLOG_RECEIVE=$( psql_get "SELECT pg_last_xlog_receive_location()" )
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debug "Last xlog file receive : $LAST_XLOG_RECEIVE"
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LAST_XLOG_REPLAY=$( psql_get "SELECT pg_last_xlog_replay_location()" )
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debug "Last xlog file replay : $LAST_XLOG_REPLAY"
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# Get master connection informations from recovery.conf file
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MASTER_CONN_INFOS=$( egrep '^ *primary_conninfo' $RECOVERY_CONF|sed "s/^ *primary_conninfo *= *[\"\']\([^\"\']*\)[\"\'].*$/\1/" )
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if [ ! -n "$MASTER_CONN_INFOS" ]
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then
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echo "UNKNOWN : Can't retreive master connection informations form recovery.conf file"
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exit 3
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fi
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debug "Master connection informations : $MASTER_CONN_INFOS"
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M_HOST=$( echo "$MASTER_CONN_INFOS"|sed 's/^.*host= *\([^ ]*\) *.*$/\1/' )
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if [ ! -n "$M_HOST" ]
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then
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echo "UNKNOWN : Can't retreive master host from recovery.conf file"
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exit 3
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fi
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debug "Master host : $M_HOST"
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M_PORT=$( echo "$MASTER_CONN_INFOS"|sed 's/^.*port= *\([^ ]*\) *.*$/\1/' )
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if [ ! -n "$M_PORT" ]
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then
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debug "Master port not specify, use default : $PG_DEFAULT_PORT"
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M_PORT=$PG_DEFAULT_PORT
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else
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debug "Master port : $M_PORT"
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fi
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# Get current xlog file from master
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M_CUR_XLOG="$( echo 'SELECT pg_current_xlog_location()'|su - $PG_USER -c "$PSQL_BIN -h $M_HOST -p $M_PORT -t -P format=unaligned" )"
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if [ ! -n "$M_CUR_XLOG" ]
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then
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echo "UNKNOWN : Can't retreive current xlog from master server"
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exit 3
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fi
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debug "Master current xlog : $M_CUR_XLOG"
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# Master current xlog is the last receive xlog ?
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if [ "$M_CUR_XLOG" != "$LAST_XLOG_RECEIVE" ]
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then
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echo "CRITICAL : Master current xlog is not the last receive xlog"
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exit 2
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fi
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debug "Master current xlog is the last receive xlog"
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# The last receive xlog is the last replay file ?
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if [ "$LAST_XLOG_RECEIVE" != "$LAST_XLOG_REPLAY" ]
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then
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echo "WARNING : last receive xlog file is not the last replay file"
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exit 1
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fi
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debug "Last receive xlog file is the last replay file"
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echo "OK : Hot-standby server is uptodate"
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exit 0
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else
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debug "File recovery.conf not found. Master mode."
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# Check recovery mode
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if [ $RECOVERY_MODE -eq 1 ]
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then
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echo "CRITICAL : In recovery mode while recovery.conf file not found !"
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exit 2
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fi
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debug "Postgres is not in recovery mode"
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# Check standby client
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STANDBY_CLIENTS=$( psql_get "SELECT client_addr, sync_state FROM pg_stat_replication;" )
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if [ ! -n "$STANDBY_CLIENTS" ]
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then
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echo "WARNING : no stand-by client connected"
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exit 1
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fi
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debug "Stand-by client(s) : $( echo -n $STANDBY_CLIENTS|sed 's/\n/ , /g' )"
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STANDBY_CLIENTS_TXT=""
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STANDBY_CLIENTS_COUNT=0
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for line in $STANDBY_CLIENTS
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do
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let STANDBY_CLIENTS_COUNT=STANDBY_CLIENTS_COUNT+1
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IP=$( echo $line|cut -d '|' -f 1 )
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MODE=$( echo $line|cut -d '|' -f 2 )
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STANDBY_CLIENTS_TXT="$STANDBY_CLIENTS_TXT $IP (mode=$MODE)"
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done
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echo "OK : $STANDBY_CLIENTS_COUNT stand-by client(s) connected - $STANDBY_CLIENTS_TXT"
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exit 0
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fi
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