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check_pg_streaming_replication
check_pg_streaming_replication
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Benjamin Renard
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9686f82
at 2015-04-27 14:24:21
check_pg_streaming_replication
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#!/bin/bash # # Nagios plugin to check Postgresql streamin replication state # # Could be use on Master or on standby node # # Requirement : # # On master node : Slaves must be able to connect with user PG_USER # to database postgres as trust # # On standby node : PG_USER must be able to connect localy as trust # # Author : Benjamin Renard <brenard@easter-eggs.com> # Date : Wed, 14 Mar 2012 14:45:55 +0000 # Source : http://git.zionetrix.net/check_pg_streaming_replication # PG_USER=postgres PSQL_BIN=/usr/bin/psql PG_MAIN=/var/lib/postgresql/9.1/main if [ -f /etc/redhat-release ] then PG_MAIN=/var/lib/pgsql/9.1/data fi RECOVERY_CONF_FILENAME=recovery.conf RECOVERY_CONF="" PG_DEFAULT_PORT=5432 DEBUG=0 function usage () { cat << EOF Usage : $0 [-d] [-h] [options] -u pg_user Specify Postgres user (Default : $PG_USER) -b psql_bin Specify psql binary path (Default : $PSQL_BIN) -m pg_main Specify Postgres main directory path (Default : $PG_MAIN) -r recovery_conf Specify Postgres recovery configuration file path (Default : $PG_MAIN/$RECOVERY_CONF_FILENAME) -p pg_port Specify default Postgres master TCP port (Default : $PG_DEFAULT_PORT) -d Debug mode -h Show this message EOF exit 0 } while getopts "hu:b:m:r:p:d" OPTION do case $OPTION in u) PG_USER=$OPTARG ;; b) PSQL_BIN=$OPTARG ;; m) PG_MAIN=$OPTARG ;; r) RECOVERY_CONF=$OPTARG ;; p) PG_DEFAULT_PORT=$OPTARG ;; d) DEBUG=1 ;; h) usage ;; \?) echo -n "Unkown option" usage esac done # Check PG_USER [ -z "$PG_USER" ] && echo "UNKNOWN : Postgres user not specify" && exit 3 id "$PG_USER" > /dev/null 2>&1 [ $? -ne 0 ] && echo "UNKNOWN : Invalid Postgres user ($PG_USER)" && exit 3 # Check PSQL_BIN [ ! -x "$PSQL_BIN" ] && echo "UNKNOWN : Invalid psql bin path ($PSQL_BIN)" && exit 3 # Check PG_MAIN [ ! -d "$PG_MAIN/" ] && echo "UNKNOWN : Invalid Postgres main directory path ($PG_MAIN)" && exit 3 # Check RECOVERY_CONF [ -z "$RECOVERY_CONF" ] && RECOVERY_CONF="$PG_MAIN/$RECOVERY_CONF_FILENAME" # Check PG_DEFAULT_PORT [ $( echo "$PG_DEFAULT_PORT"|grep -c -E '^[0-9]*$' ) -ne 1 ] && "UNKNOWN : Postgres default master TCP port must be an integer." && exit 3 function psql_get () { echo "$1"|su - $PG_USER -c "$PSQL_BIN -t -P format=unaligned" } function debug() { if [ $DEBUG -eq 1 ] then echo "[DEBUG] $1" fi } debug "Running options : PG_USER = $PG_USER PSQL_BIN = $PSQL_BIN PG_MAIN = $PG_MAIN RECOVERY_CONF = $RECOVERY_CONF PG_DEFAULT_PORT = $PG_DEFAULT_PORT" # Postgres is running ? if [ $DEBUG -eq 0 ] then psql_get '\q' 2> /dev/null else psql_get '\q' fi if [ $? -ne 0 ] then echo "CRITICAL : Postgres is not running !" exit 2 fi debug "Postgres is running" RECOVERY_MODE=0 [ $( psql_get 'SELECT pg_is_in_recovery();' ) == "t" ] && RECOVERY_MODE=1 if [ -f $RECOVERY_CONF ] then debug "File recovery.conf found. Hot-standby mode." # Check recovery mode if [ $RECOVERY_MODE -ne 1 ] then echo "CRITICAL : Not in recovery mode while recovery.conf file found !" exit 2 fi debug "Postgres is in recovery mode" LAST_XLOG_RECEIVE=$( psql_get "SELECT pg_last_xlog_receive_location()" ) debug "Last xlog file receive : $LAST_XLOG_RECEIVE" LAST_XLOG_REPLAY=$( psql_get "SELECT pg_last_xlog_replay_location()" ) debug "Last xlog file replay : $LAST_XLOG_REPLAY" # Get master connection informations from recovery.conf file MASTER_CONN_INFOS=$( egrep '^ *primary_conninfo' $RECOVERY_CONF|sed "s/^ *primary_conninfo *= *[\"\']\([^\"\']*\)[\"\'].*$/\1/" ) if [ ! -n "$MASTER_CONN_INFOS" ] then echo "UNKNOWN : Can't retreive master connection informations form recovery.conf file" exit 3 fi debug "Master connection informations : $MASTER_CONN_INFOS" M_HOST=$( echo "$MASTER_CONN_INFOS"|sed 's/^.*host= *\([^ ]*\) *.*$/\1/' ) if [ ! -n "$M_HOST" ] then echo "UNKNOWN : Can't retreive master host from recovery.conf file" exit 3 fi debug "Master host : $M_HOST" M_PORT=$( echo "$MASTER_CONN_INFOS"|sed 's/^.*port= *\([^ ]*\) *.*$/\1/' ) if [ ! -n "$M_PORT" ] then debug "Master port not specify, use default : $PG_DEFAULT_PORT" M_PORT=$PG_DEFAULT_PORT else debug "Master port : $M_PORT" fi # Get current xlog file from master M_CUR_XLOG="$( echo 'SELECT pg_current_xlog_location()'|su - $PG_USER -c "$PSQL_BIN -h $M_HOST -p $M_PORT -t -P format=unaligned" )" if [ ! -n "$M_CUR_XLOG" ] then echo "UNKNOWN : Can't retreive current xlog from master server" exit 3 fi debug "Master current xlog : $M_CUR_XLOG" # Master current xlog is the last receive xlog ? if [ "$M_CUR_XLOG" != "$LAST_XLOG_RECEIVE" ] then echo "CRITICAL : Master current xlog is not the last receive xlog" exit 2 fi debug "Master current xlog is the last receive xlog" # The last receive xlog is the last replay file ? if [ "$LAST_XLOG_RECEIVE" != "$LAST_XLOG_REPLAY" ] then echo "WARNING : last receive xlog file is not the last replay file" exit 1 fi debug "Last receive xlog file is the last replay file" echo "OK : Hot-standby server is uptodate" exit 0 else debug "File recovery.conf not found. Master mode." # Check recovery mode if [ $RECOVERY_MODE -eq 1 ] then echo "CRITICAL : In recovery mode while recovery.conf file not found !" exit 2 fi debug "Postgres is not in recovery mode" # Check standby client STANDBY_CLIENTS=$( psql_get "SELECT client_addr, sync_state FROM pg_stat_replication;" ) if [ ! -n "$STANDBY_CLIENTS" ] then echo "WARNING : no stand-by client connected" exit 1 fi debug "Stand-by client(s) : $( echo -n $STANDBY_CLIENTS|sed 's/\n/ , /g' )" STANDBY_CLIENTS_TXT="" STANDBY_CLIENTS_COUNT=0 for line in $STANDBY_CLIENTS do let STANDBY_CLIENTS_COUNT=STANDBY_CLIENTS_COUNT+1 IP=$( echo $line|cut -d '|' -f 1 ) MODE=$( echo $line|cut -d '|' -f 2 ) STANDBY_CLIENTS_TXT="$STANDBY_CLIENTS_TXT $IP (mode=$MODE)" done echo "OK : $STANDBY_CLIENTS_COUNT stand-by client(s) connected - $STANDBY_CLIENTS_TXT" exit 0 fi