bn8/check_pg_streaming_replication
1
0
Fork 0
Code Issues Pull requests Projects Releases 2 Wiki Activity Actions
check_pg_streaming_replication/check_pg_streaming_replication
Benjamin Renard 54b9b79023 Improve debug mode about master SQL request
2019-03-15 16:30:20 +01:00

279 lines
7.7 KiB
Bash
Executable file
Raw Blame History

#!/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 from recovery.conf
# to database with the same name (or another specified with -D)
# as trust (or via md5 using password specified in ~/.pgpass).
#
# On standby node : PG_USER must be able to connect localy on the database
# with the same name (or another specified with -D) as trust
# (or via md5 using password specified in ~/.pgpass).
#
# Author : Benjamin Renard <brenard@easter-eggs.com>
# Date : Fri, 25 Aug 2017 15:57:57 +0200
# Source : http://git.zionetrix.net/check_pg_streaming_replication
#
PG_USER=postgres
PG_MASTER_USER=""
PSQL_BIN=/usr/bin/psql
PG_MAIN=/var/lib/postgresql/9.1/main
if [ -f /etc/debian_version ]
then
AUTO_PG_MAIN=$( ls -1d /var/lib/postgresql/9*/main 2> /dev/null|sort -n|tail -n 1 )
[ -n "$AUTO_PG_MAIN" -a -d "$AUTO_PG_MAIN" ] && PG_MAIN=$AUTO_PG_MAIN
elif [ -f /etc/redhat-release ]
then
AUTO_PG_MAIN=$( ls -1d /var/lib/pgsql/9*/data 2> /dev/null|sort -n|tail -n 1 )
[ -n "$AUTO_PG_MAIN" -a -d "$AUTO_PG_MAIN" ] && PG_MAIN=$AUTO_PG_MAIN
fi
RECOVERY_CONF_FILENAME=recovery.conf
RECOVERY_CONF=""
PG_DEFAULT_PORT=5432
PG_DB=""
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
(By default, try to auto-detect it, on your system it :
$PG_MAIN)
-r recovery_conf Specify Postgres recovery configuration file path
(Default : [PG_MAIN]/$RECOVERY_CONF_FILENAME)
-U pg_master_user Specify Postgres user to use on master (Default : user from recovery.conf file)
-p pg_port Specify default Postgres master TCP port (Default : $PG_DEFAULT_PORT)
-D dbname Specify DB name on Postgres master/slave to connect on (Default : PG_USER)
-d Debug mode
-h Show this message
EOF
exit 0
}
while getopts "hu:b:m:r:U:p:D:d" OPTION
do
case $OPTION in
u)
PG_USER=$OPTARG
;;
b)
PSQL_BIN=$OPTARG
;;
m)
PG_MAIN=$OPTARG
;;
r)
RECOVERY_CONF=$OPTARG
;;
U)
PG_MASTER_USER=$OPTARG
;;
p)
PG_DEFAULT_PORT=$OPTARG
;;
D)
PG_DB=$OPTARG
;;
d)
DEBUG=1
;;
h)
usage
;;
\?)
echo -n "Unkown option"
usage
esac
done
# Check PG_USER
[ -z "$PG_USER" ] && echo "UNKNOWN : Postgres user not specified" && exit 3
id "$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]*$' ) -ne 1 ] && "UNKNOWN : Postgres default master TCP port must be an integer." && exit 3
# If PG_DB is not provided with -D parameter, use PG_USER as default value
[ -z "$PG_DB" ] && PG_DB="$PG_USER"
function psql_get () {
sql="$1"
debug "Exec 'echo \"$sql\"|su - $PG_USER -c \"$PSQL_BIN -d \"$PG_DB\" -w -t -P format=unaligned\""
echo "$sql"|su - $PG_USER -c "$PSQL_BIN -d "$PG_DB" -w -t -P format=unaligned"
}
function psql_master_get () {
sql="$1"
debug "Exec 'echo \"$sql\"|su - $PG_USER -c \"$PSQL_BIN -U $M_USER -h $M_HOST -w -p $M_PORT -d $PG_DB -t -P format=unaligned\""
echo "$sql"|su - $PG_USER -c "$PSQL_BIN -U $M_USER -h $M_HOST -w -p $M_PORT -d $PG_DB -t -P format=unaligned"
}
function debug() {
if [ $DEBUG -eq 1 ]
then
>&2 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"| grep 'host=' | sed 's/^.*host= *\([0-9a-zA-Z.-]\+\) *.*$/\1/' )
if [ ! -n "$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"| grep 'port=' | sed 's/^.*port= *\([0-9a-zA-Z.-]\+\) *.*$/\1/' )
if [ ! -n "$M_PORT" ]
then
debug "Master port not specified, use default : $PG_DEFAULT_PORT"
M_PORT=$PG_DEFAULT_PORT
else
debug "Master port : $M_PORT"
fi
if [ -n "$PG_MASTER_USER" ]
then
debug "Master user provided by command-line, use it : $PG_MASTER_USER"
M_USER="$PG_MASTER_USER"
else
M_USER=$( echo "$MASTER_CONN_INFOS"| grep 'user=' | sed 's/^.*user= *\([0-9a-zA-Z.-]\+\) *.*$/\1/' )
if [ ! -n "$M_USER" ]
then
debug "Master user not specified, use default : $PG_USER"
M_USER=$PG_USER
else
debug "Master user : $M_USER"
fi
fi
# Get current xlog file from master
M_CUR_XLOG="$( psql_master_get 'SELECT pg_current_xlog_location()' )"
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
Reference in a new issue View git blame Copy permalink