Code cleaning
This commit is contained in:
Benjamin Renard
parent
269b92415f
commit
bc078f83e8
GPG key ID:
3E2E1CE1907115BC
1 changed files with 121 additions and 65 deletions
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@ -48,29 +48,37 @@ EXPECTED_MODE=auto
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DEBUG=0
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function usage () {
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ERROR="$1"
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ERROR="$*"
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[[ -n "$ERROR" ]] && echo -e "$ERROR\n"
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cat << EOF
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Usage: $0 [-d] [-h] [options]
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-u pg_user Specify local Postgres user (Default: try to auto-detect or use $DEFAULT_PG_USER)
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-u pg_user Specify local Postgres user (Default: try to auto-detect or
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use $DEFAULT_PG_USER)
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-b psql_bin Specify psql binary path (Default: $PSQL_BIN)
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-B pg_lsclusters_bin Specify pg_lsclusters binary path (Default: $PG_LSCLUSTER_BIN)
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-V pg_version Specify Postgres version (Default: try to auto-detect or use $DEFAULT_PG_VERSION)
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-m pg_main Specify Postgres main directory path (Default: try to auto-detect or use
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$DEFAULT_PG_MAIN)
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-V pg_version Specify Postgres version (Default: try to auto-detect or
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use $DEFAULT_PG_VERSION)
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-m pg_main Specify Postgres main directory path (Default: try to auto-detect or
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use $DEFAULT_PG_MAIN)
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-r recovery_conf Specify Postgres recovery configuration file path
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(Default: [PG_MAIN]/recovery.conf on PG <= 11, [PG_MAIN]/postgresql.auto.conf on PG >= 12)
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-U pg_master_user Specify Postgres user to use on master (Default: user from recovery.conf file)
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-p pg_port Specify default Postgres master TCP port (Default: same as local PostgreSQL
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port if detected or use $DEFAULT_PG_PORT)
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-D dbname Specify DB name on Postgres master/slave to connect on (Default: PG_USER, must
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match with .pgpass one is used)
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-C 1/0 Enable or disable check if the current LSN of the master host is the same
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of the last received LSN (Default: $CHECK_CUR_MASTER_LSN)
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-w replay_warn_delay Specify the replay warning delay in second (Default: $REPLAY_WARNING_DELAY)
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-c replay_crit_delay Specify the replay critical delay in second (Default: $REPLAY_CRITICAL_DELAY)
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-e expected_sync_state The expected replication state ('sync' or 'async', default: $EXPECTED_SYNC_STATE)
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-E expected_mode The expected mode ('master', 'hot-standby' or 'auto', default: '$EXPECTED_MODE')
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(Default: [PG_MAIN]/recovery.conf on PG <= 11,
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[PG_MAIN]/postgresql.auto.conf on PG >= 12)
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-U pg_master_user Specify Postgres user to use on master (Default: user from recovery.conf
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file)
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-p pg_port Specify default Postgres master TCP port (Default: same as local
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PostgreSQL port if detected or use $DEFAULT_PG_PORT)
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-D dbname Specify DB name on Postgres master/slave to connect on (Default:
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PG_USER, must match with .pgpass one is used)
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-C 1/0 Enable or disable check if the current LSN of the master host is the
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same of the last received LSN (Default: $CHECK_CUR_MASTER_LSN)
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-w replay_warn_delay Specify the replay warning delay in second
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(Default: $REPLAY_WARNING_DELAY)
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-c replay_crit_delay Specify the replay critical delay in second
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(Default: $REPLAY_CRITICAL_DELAY)
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-e expected_sync_state The expected replication state ('sync' or 'async',
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default: $EXPECTED_SYNC_STATE)
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-E expected_mode The expected mode ('master', 'hot-standby' or 'auto',
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default: '$EXPECTED_MODE')
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-d Debug mode
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-h Show this message
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EOF
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@ -117,12 +125,15 @@ while getopts "hu:b:B:V:m:r:U:p:D:C:w:c:e:E:d" OPTION; do
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;;
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e)
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[[ "$OPTARG" != "sync" ]] && [[ "$OPTARG" != "async" ]] && \
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usage "Invalid expected replication state '$OPTARG'. Possible values: sync or async."
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usage "Invalid expected replication state '$OPTARG'." \
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"Possible values: sync or async."
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EXPECTED_SYNC_STATE=$OPTARG
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;;
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E)
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[[ "$OPTARG" != "master" ]] && [[ "$OPTARG" != "hot-standby" ]] && [[ "$OPTARG" != "auto" ]] && \
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usage "Invalid expected mode '$OPTARG'. Possible values: master, hot-standby or auto."
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[[ "$OPTARG" != "master" ]] && [[ "$OPTARG" != "hot-standby" ]] && \
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[[ "$OPTARG" != "auto" ]] && \
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usage "Invalid expected mode '$OPTARG'. Possible values: master, hot-standby" \
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"or auto."
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EXPECTED_MODE=$OPTARG
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;;
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d)
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@ -139,7 +150,7 @@ done
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function debug() {
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if [[ $DEBUG -eq 1 ]]; then
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>&2 echo -e "[DEBUG] $1"
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>&2 echo -e "[DEBUG] $*"
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fi
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}
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@ -162,15 +173,19 @@ EXPECTED_MODE = $EXPECTED_MODE
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# Auto-detect PostgreSQL information using pg_lsclusters
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if [[ -x "$PG_LSCLUSTER_BIN" ]]; then
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PG_CLUSTER=$( $PG_LSCLUSTER_BIN -h 2>/dev/null|head -n1 )
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PG_CLUSTER=$( $PG_LSCLUSTER_BIN -h 2>/dev/null | head -n1 )
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if [[ -n "$PG_CLUSTER" ]]; then
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debug "pg_lsclusters output:\n\t$PG_CLUSTER"
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# Output example:
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# 9.6 main 5432 online,recovery postgres /var/lib/postgresql/9.6/main /var/log/postgresql/postgresql-9.6-main.log
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[[ -z "$PG_VERSION" ]] && PG_VERSION=$( echo "$PG_CLUSTER"|awk -F ' +' '{print $1}' )
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[[ -z "$PG_DEFAULT_PORT" ]] && PG_DEFAULT_PORT=$( echo "$PG_CLUSTER"|awk -F ' +' '{print $3}' )
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[[ -z "$PG_USER" ]] && PG_USER=$( echo "$PG_CLUSTER"|awk -F ' +' '{print $5}' )
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[[ -z "$PG_MAIN" ]] && PG_MAIN=$( echo "$PG_CLUSTER"|awk -F ' +' '{print $6}' )
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# 9.6 main 5432 online,recovery postgres /var/lib/postgresql/9.6/main \
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# /var/log/postgresql/postgresql-9.6-main.log
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# 13 main 5432 online,recovery,pacemaker postgres /var/lib/postgresql/13/main \
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# /var/log/postgresql/postgresql-13-main.log
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[[ -z "$PG_VERSION" ]] && PG_VERSION=$( awk -F ' +' '{print $1}' <<< "$PG_CLUSTER" )
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[[ -z "$PG_DEFAULT_PORT" ]] && \
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PG_DEFAULT_PORT=$( awk -F ' +' '{print $3}' <<< "$PG_CLUSTER" )
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[[ -z "$PG_USER" ]] && PG_USER=$( awk -F ' +' '{print $5}' <<< "$PG_CLUSTER" )
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[[ -z "$PG_MAIN" ]] && PG_MAIN=$( awk -F ' +' '{print $6}' <<< "$PG_CLUSTER" )
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fi
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else
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debug "pg_lsclusters not found ($PG_LSCLUSTER_BIN): parameters auto-detection disabled"
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@ -194,7 +209,11 @@ id "$PG_USER" > /dev/null 2>&1 || { echo "UNKNOWN: Invalid Postgres user ($PG_US
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# Check RECOVERY_CONF
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if [[ -z "$RECOVERY_CONF" ]]; then
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[[ $PG_VERSION -le 11 ]] && RECOVERY_CONF_FILENAME="recovery.conf" || RECOVERY_CONF_FILENAME="postgresql.auto.conf"
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if [[ $PG_VERSION -le 11 ]]; then
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RECOVERY_CONF_FILENAME="recovery.conf"
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else
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RECOVERY_CONF_FILENAME="postgresql.auto.conf"
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fi
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RECOVERY_CONF="$PG_MAIN/$RECOVERY_CONF_FILENAME"
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else
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RECOVERY_CONF_FILENAME=$( basename "$RECOVERY_CONF" )
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@ -208,15 +227,17 @@ fi
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[[ -z "$PG_DB" ]] && PG_DB="$PG_USER"
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function psql_get () {
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sql="$1"
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debug "Exec 'echo \"$sql\"|sudo -u $PG_USER $PSQL_BIN -d \"$PG_DB\" -w -t -P format=unaligned"
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local sql="$*"
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debug "Exec 'sudo -u $PG_USER $PSQL_BIN -d \"$PG_DB\" -w -t -P format=unaligned <<< \"$sql\""
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sudo -u "$PG_USER" "$PSQL_BIN" -d "$PG_DB" -w -t -P format=unaligned <<< "$sql"
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}
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function psql_master_get () {
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sql="$1"
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debug "Exec 'echo \"$sql\"|sudo -u $PG_USER $PSQL_BIN -U $M_USER -h $M_HOST -w -p $M_PORT -d $PG_DB -t -P format=unaligned"
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sudo -u "$PG_USER" "$PSQL_BIN" -U "$M_USER" -h "$M_HOST" -w -p "$M_PORT" -d "$PG_DB" -t -P format=unaligned <<< "$sql"
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local sql="$*"
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debug "Exec 'sudo -u $PG_USER $PSQL_BIN -U $M_USER -h $M_HOST -w -p $M_PORT -d $PG_DB -t" \
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"-P format=unaligned <<< \"$sql\""
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sudo -u "$PG_USER" "$PSQL_BIN" \
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-U "$M_USER" -h "$M_HOST" -w -p "$M_PORT" -d "$PG_DB" -t -P format=unaligned <<< "$sql"
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}
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debug "Running options:
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@ -273,7 +294,8 @@ if [[ "$EXPECTED_MODE" == "auto" ]]; then
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if [[ $RECOVERY_MODE -eq 1 ]]; then
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debug "Postgres is in recovery mode. Hot-standby mode."
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EXPECTED_MODE="hot-standby"
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elif [[ -f $RECOVERY_CONF ]] && [[ $( grep -cE '^\s*primary_conninfo' "$RECOVERY_CONF" ) -gt 0 ]]; then
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elif [[ -f $RECOVERY_CONF ]] && \
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[[ $( grep -cE '^\s*primary_conninfo' "$RECOVERY_CONF" ) -gt 0 ]]; then
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debug "File $RECOVERY_CONF_FILENAME found and contain primary_conninfo. Hot-standby mode."
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EXPECTED_MODE="hot-standby"
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else
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@ -301,19 +323,24 @@ if [[ "$EXPECTED_MODE" == "hot-standby" ]]; then
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# Get master connection information from primary_conninfo configuration parameter
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MASTER_CONN_INFOS=$( psql_get "SHOW primary_conninfo" )
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if [[ -z "$MASTER_CONN_INFOS" ]]; then
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echo "UNKNOWN: Can't retrieve master connection information from primary_conninfo configuration parameter"
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echo "UNKNOWN: Can't retrieve master connection information from primary_conninfo" \
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"configuration parameter"
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exit 3
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fi
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debug "Master connection information: $MASTER_CONN_INFOS"
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M_HOST=$( grep 'host=' <<< "$MASTER_CONN_INFOS" | sed 's/^.*host= *\([0-9a-zA-Z.-]\+\) *.*$/\1/' )
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M_HOST=$(
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grep 'host=' <<< "$MASTER_CONN_INFOS" | sed 's/^.*host= *\([0-9a-zA-Z.-]\+\) *.*$/\1/'
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)
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if [[ -z "$M_HOST" ]]; then
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echo "UNKNOWN: Can't retrieve master host from primary_conninfo configuration parameter"
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exit 3
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fi
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debug "Master host: $M_HOST"
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M_PORT=$( grep 'port=' <<< "$MASTER_CONN_INFOS" | sed 's/^.*port= *\([0-9a-zA-Z.-]\+\) *.*$/\1/' )
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M_PORT=$(
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grep 'port=' <<< "$MASTER_CONN_INFOS" | sed 's/^.*port= *\([0-9a-zA-Z.-]\+\) *.*$/\1/'
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)
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if [[ -z "$M_PORT" ]]; then
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debug "Master port not specified, use default: $PG_DEFAULT_PORT"
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M_PORT=$PG_DEFAULT_PORT
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@ -325,7 +352,9 @@ if [[ "$EXPECTED_MODE" == "hot-standby" ]]; then
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debug "Master user provided by command-line, use it: $PG_MASTER_USER"
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M_USER="$PG_MASTER_USER"
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else
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M_USER=$( grep 'user=' <<< "$MASTER_CONN_INFOS" | sed 's/^.*user= *\([0-9a-zA-Z.-]\+\) *.*$/\1/' )
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M_USER=$(
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grep 'user=' <<< "$MASTER_CONN_INFOS" | sed 's/^.*user= *\([0-9a-zA-Z.-]\+\) *.*$/\1/'
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)
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if [[ -z "$M_USER" ]]; then
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debug "Master user not specified, use default: $PG_USER"
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M_USER=$PG_USER
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@ -334,7 +363,10 @@ if [[ "$EXPECTED_MODE" == "hot-standby" ]]; then
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fi
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fi
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M_APP_NAME=$( grep 'application_name=' <<< "$MASTER_CONN_INFOS" | sed "s/^.*application_name=[ \'\"]*\([^ \'\"]\+\)[ \'\"]*.*$/\1/" )
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M_APP_NAME=$(
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grep 'application_name=' <<< "$MASTER_CONN_INFOS" |
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sed "s/^.*application_name=[ \'\"]*\([^ \'\"]\+\)[ \'\"]*.*$/\1/"
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)
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if [[ -z "$M_APP_NAME" ]]; then
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if [[ $PG_VERSION -ge 12 ]]; then
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debug "Master application name not specified, use cluster_name if defined"
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@ -355,24 +387,31 @@ if [[ "$EXPECTED_MODE" == "hot-standby" ]]; then
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fi
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# Get current replication state information from master
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M_CUR_REPL_STATE_INFO="$( psql_master_get "SELECT state, sync_state, $sent_lsn AS sent_lsn, $write_lsn AS write_lsn FROM pg_stat_replication WHERE application_name='$M_APP_NAME';" )"
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M_CUR_REPL_STATE_INFO="$(
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psql_master_get \
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"SELECT state, sync_state, $sent_lsn AS sent_lsn, $write_lsn AS write_lsn" \
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"FROM pg_stat_replication WHERE application_name='$M_APP_NAME';"
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)"
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if [[ -z "$M_CUR_REPL_STATE_INFO" ]]; then
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echo "UNKNOWN: Can't retrieve current replication state information from master server"
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exit 3
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fi
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debug "Master current replication state:\n\tstate|sync_state|sent_lsn|write_lsn\n\t$M_CUR_REPL_STATE_INFO"
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debug "Master current replication state:\n" \
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"\tstate|sync_state|sent_lsn|write_lsn\n\t$M_CUR_REPL_STATE_INFO"
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M_CUR_STATE=$( cut -d'|' -f1 <<< "$M_CUR_REPL_STATE_INFO" )
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debug "Master current state: $M_CUR_STATE"
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if [[ "$M_CUR_STATE" != "streaming" ]]; then
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echo "CRITICAL: this host is not in streaming state according to master host (current state = '$M_CUR_STATE')"
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echo "CRITICAL: this host is not in streaming state according to master host" \
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"(current state = '$M_CUR_STATE')"
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exit 2
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fi
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M_CUR_SYNC_STATE=$( cut -d'|' -f2 <<< "$M_CUR_REPL_STATE_INFO" )
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debug "Master current sync state: $M_CUR_SYNC_STATE"
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if [[ "$M_CUR_SYNC_STATE" != "$EXPECTED_SYNC_STATE" ]]; then
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echo "CRITICAL: unexpected replication state '$M_CUR_SYNC_STATE' (expected state = '$EXPECTED_SYNC_STATE')"
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echo "CRITICAL: unexpected replication state '$M_CUR_SYNC_STATE'" \
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"(expected state = '$EXPECTED_SYNC_STATE')"
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exit 2
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fi
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@ -400,15 +439,22 @@ if [[ "$EXPECTED_MODE" == "hot-standby" ]]; then
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# The last received LSN is the last replayed ?
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if [[ "$LAST_RECEIVED_LSN" != "$LAST_REPLAYED_LSN" ]]; then
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debug "/!\ The last received LSN is NOT the last replayed LSN ('$M_CUR_LSN' / '$LAST_REPLAYED_LSN')"
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REPLAY_DELAY="$( psql_get 'SELECT EXTRACT(EPOCH FROM now() - pg_last_xact_replay_timestamp());' )"
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debug "/!\ The last received LSN is NOT the last replayed LSN" \
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"('$M_CUR_LSN' / '$LAST_REPLAYED_LSN')"
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REPLAY_DELAY="$(
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psql_get 'SELECT EXTRACT(EPOCH FROM now() - pg_last_xact_replay_timestamp());'
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)"
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debug "Replay delay is $REPLAY_DELAY second(s)"
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if [[ $( bc -l <<< "$REPLAY_DELAY >= $REPLAY_CRITICAL_DELAY" ) -gt 0 ]]; then
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echo "CRITICAL: last received LSN is not the last replayed ('$LAST_RECEIVED_LSN' / '$LAST_REPLAYED_LSN') and replay delay is $REPLAY_DELAY second(s)"
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echo "CRITICAL: last received LSN is not the last replayed" \
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"('$LAST_RECEIVED_LSN' / '$LAST_REPLAYED_LSN') and" \
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"replay delay is $REPLAY_DELAY second(s)"
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exit 2
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fi
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if [[ $( bc -l <<< "$REPLAY_DELAY >= $REPLAY_WARNING_DELAY" ) -gt 0 ]]; then
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echo "WARNING: last received LSN is not the last replay file ('$LAST_RECEIVED_LSN' / '$LAST_REPLAYED_LSN') and replay delay is $REPLAY_DELAY second(s)"
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echo "WARNING: last received LSN is not the last replay file" \
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"('$LAST_RECEIVED_LSN' / '$LAST_REPLAYED_LSN') and" \
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"replay delay is $REPLAY_DELAY second(s)"
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exit 1
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fi
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debug "Replay delay is not worrying"
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@ -417,7 +463,8 @@ if [[ "$EXPECTED_MODE" == "hot-standby" ]]; then
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# The master last sent LSN is the last received (and synced) ?
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if [[ "$M_CUR_SENT_LSN" != "$LAST_RECEIVED_LSN" ]]; then
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echo "WARNING: master last sent LSN is not already received (and synced to disk) by slave. May be we have some network delay or load on slave"
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echo "WARNING: master last sent LSN is not already received (and synced to disk) by slave."
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echo "May be we have some network delay or load on slave"
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echo "Master last sent LSN: $M_CUR_SENT_LSN"
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echo "Slave last received (and synced to disk) LSN: $LAST_RECEIVED_LSN"
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exit 1
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@ -445,27 +492,32 @@ elif [[ "$EXPECTED_MODE" == "master" ]]; then
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debug "Current LSN: $CURRENT_LSN"
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# Check standby client
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STANDBY_CLIENTS=$( psql_get "SELECT application_name, client_addr, sent_lsn, write_lsn, state, sync_state, current_lag
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FROM (
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SELECT application_name, client_addr, sent_lsn, write_lsn, state, sync_state, current_lag
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FROM (
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SELECT application_name, client_addr, $sent_lsn AS sent_lsn, $write_lsn AS write_lsn, state, sync_state,
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$pg_wal_lsn_diff($pg_current_wal_lsn, $write_lsn) AS current_lag
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FROM pg_stat_replication
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) AS s2
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) AS s1" )
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STANDBY_CLIENTS=$(
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psql_get \
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"SELECT
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application_name, client_addr, sent_lsn, write_lsn, state, sync_state, current_lag
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FROM (
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SELECT
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application_name, client_addr, sent_lsn, write_lsn, state, sync_state,
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current_lag
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FROM (
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SELECT
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application_name, client_addr, $sent_lsn AS sent_lsn,
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$write_lsn AS write_lsn, state, sync_state,
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$pg_wal_lsn_diff($pg_current_wal_lsn, $write_lsn) AS current_lag
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FROM pg_stat_replication
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) AS s2
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) AS s1"
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)
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if [[ -z "$STANDBY_CLIENTS" ]]; 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):\n\t${STANDBY_CLIENTS//$'\n'/\\n\\t}"
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STANDBY_CLIENTS_TXT=""
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STANDBY_CLIENTS_COUNT=0
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STANDBY_CLIENTS_ROWS=()
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CURRENT_LSN_IS_LAST_SENT=1
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for line in $STANDBY_CLIENTS; do
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(( STANDBY_CLIENTS_COUNT+=1 ))
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||||
|
||||
NAME=$( cut -d '|' -f 1 <<< "$line" )
|
||||
IP=$( cut -d '|' -f 2 <<< "$line" )
|
||||
SENT_LSN=$( cut -d '|' -f 3 <<< "$line" )
|
||||
|
|
@ -473,20 +525,24 @@ elif [[ "$EXPECTED_MODE" == "master" ]]; then
|
|||
STATE=$( cut -d '|' -f 5 <<< "$line" )
|
||||
SYNC_STATE=$( cut -d '|' -f 6 <<< "$line" )
|
||||
LAG=$( cut -d '|' -f 7 <<< "$line" )
|
||||
STANDBY_CLIENTS_TXT="$STANDBY_CLIENTS_TXT\n$NAME ($IP): $STATE/$SYNC_STATE (LSN: sent='$SENT_LSN' / writed='$WRITED_LSN', Lag: ${LAG}b)"
|
||||
STANDBY_CLIENTS_ROW="$NAME ($IP): $STATE/$SYNC_STATE"
|
||||
STANDBY_CLIENTS_ROW+=" (LSN: sent='$SENT_LSN' / writed='$WRITED_LSN', Lag: ${LAG}b"
|
||||
STANDBY_CLIENTS_ROWS+=( "$STANDBY_CLIENTS_ROW" )
|
||||
[[ "$SENT_LSN" != "$CURRENT_LSN" ]] && CURRENT_LSN_IS_LAST_SENT=0
|
||||
done
|
||||
|
||||
if [[ $CURRENT_LSN_IS_LAST_SENT -eq 1 ]]; then
|
||||
echo "OK: $STANDBY_CLIENTS_COUNT stand-by client(s) connected"
|
||||
echo "OK: ${#STANDBY_CLIENTS_ROWS[@]} stand-by client(s) connected"
|
||||
EXIT_CODE=0
|
||||
else
|
||||
echo "WARNING: current master LSN is not the last sent to stand-by client(s) connected. May be we have some load ?"
|
||||
echo "WARNING: current master LSN is not the last sent to stand-by client(s) connected." \
|
||||
"May be we have some load ?"
|
||||
EXIT_CODE=1
|
||||
fi
|
||||
|
||||
echo "Current master LSN: $CURRENT_LSN"
|
||||
echo -e "$STANDBY_CLIENTS_TXT"
|
||||
IFS=$'\n'
|
||||
echo "${STANDBY_CLIENTS_ROWS[*]}"
|
||||
exit $EXIT_CODE
|
||||
else
|
||||
echo "UNKNOWN - Invalid mode '$EXPECTED_MODE'"
|
||||
|
|
|
|||
Loading…
Reference in a new issue