</para>
<programlisting>
health_check_period = 5
- # Health check period
- # Disabled (0) by default
+ # Health check period
+ # Disabled (0) by default
health_check_timeout = 30
- # Health check timeout
- # 0 means no timeout
+ # Health check timeout
+ # 0 means no timeout
health_check_user = 'pgpool'
health_check_password = ''
# - Backend Connection Settings -
backend_hostname0 = 'server1'
- # Host name or IP address to connect to for backend 0
+ # Host name or IP address to connect to for backend 0
backend_port0 = 5432
- # Port number for backend 0
+ # Port number for backend 0
backend_weight0 = 1
- # Weight for backend 0 (only in load balancing mode)
+ # Weight for backend 0 (only in load balancing mode)
backend_data_directory0 = '/var/lib/pgsql/11/data'
- # Data directory for backend 0
+ # Data directory for backend 0
backend_flag0 = 'ALLOW_TO_FAILOVER'
- # Controls various backend behavior
- # ALLOW_TO_FAILOVER or DISALLOW_TO_FAILOVER
+ # Controls various backend behavior
+ # ALLOW_TO_FAILOVER or DISALLOW_TO_FAILOVER
backend_hostname1 = 'server2'
backend_port1 = 5432
backend_weight1 = 1
</para>
</note>
<para>
- <filename>/etc/pgpool-II/failover.sh</filename>及び<filename>/etc/pgpool-II/follow_master.sh</filename>を作成し、実行権限を与えておきます。
+ サンプルスクリプト<ulink url="https://git.postgresql.org/gitweb/?p=pgpool2.git;a=blob_plain;f=src/sample/scripts/failover.sh.sample;hb=refs/heads/master">failover.sh</ulink>及び<ulink url="https://git.postgresql.org/gitweb/?p=pgpool2.git;a=blob_plain;f=src/sample/scripts/follow_master.sh.sample;hb=refs/heads/master">follow_master.sh</ulink>は
+ <filename>/etc/pgpool-II/</filename>配下にインストールされていますので、これらのファイルをコピーして作成します。
</para>
<programlisting>
- # vi /etc/pgpool-II/failover.sh
- # vi /etc/pgpool-II/follow_master.sh
- # chmod +x /etc/pgpool-II/{failover.sh,follow_master.sh}
+ # cp /etc/pgpool-II/failover.sh{.sample,}
+ # cp /etc/pgpool-II/follow_master.sh{.sample,}
+ </programlisting>
+ <para>
+ 基本的には<emphasis>PGHOME</emphasis>を環境に合わせて変更すれば、動作します。
+ </para>
+ <programlisting>
+ [server1]# vi /etc/pgpool-II/failover.sh
+ ...
+ PGHOME=/usr/pgsql-11
+ ...
+
+ [server1]# vi /etc/pgpool-II/follow_master.sh
+ ...
+ PGHOME=/usr/pgsql-11
+ ...
</programlisting>
-
- <itemizedlist>
- <listitem>
- <para>
- /etc/pgpool-II/failover.sh
- </para>
- <programlisting>
-#!/bin/bash
-# This script is run by failover_command.
-
-set -o xtrace
-exec > >(logger -i -p local1.info) 2>&1
-
-# Special values:
-# %d = failed node id
-# %h = failed node hostname
-# %p = failed node port number
-# %D = failed node database cluster path
-# %m = new master node id
-# %H = new master node hostname
-# %M = old master node id
-# %P = old primary node id
-# %r = new master port number
-# %R = new master database cluster path
-# %N = old primary node hostname
-# %S = old primary node port number
-# %% = '%' character
-
-FAILED_NODE_ID="$1"
-FAILED_NODE_HOST="$2"
-FAILED_NODE_PORT="$3"
-FAILED_NODE_PGDATA="$4"
-NEW_MASTER_NODE_ID="$5"
-NEW_MASTER_NODE_HOST="$6"
-OLD_MASTER_NODE_ID="$7"
-OLD_PRIMARY_NODE_ID="$8"
-NEW_MASTER_NODE_PORT="$9"
-NEW_MASTER_NODE_PGDATA="${10}"
-OLD_PRIMARY_NODE_HOST="${11}"
-OLD_PRIMARY_NODE_PORT="${12}"
-
-PGHOME=/usr/pgsql-11
-
-
-logger -i -p local1.info failover.sh: start: failed_node_id=$FAILED_NODE_ID old_primary_node_id=$OLD_PRIMARY_NODE_ID failed_host=$FAILED_NODE_HOST new_master_host=$NEW_MASTER_NODE_HOST
-
-## If there's no master node anymore, skip failover.
-if [ $NEW_MASTER_NODE_ID -lt 0 ]; then
- logger -i -p local1.info failover.sh: All nodes are down. Skipping failover.
- exit 0
-fi
-
-## Test passwrodless SSH
-ssh -T -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null postgres@${NEW_MASTER_NODE_HOST} -i ~/.ssh/id_rsa_pgpool ls /tmp > /dev/null
-
-if [ $? -ne 0 ]; then
- logger -i -p local1.info failover.sh: passwrodless SSH to postgres@${NEW_MASTER_NODE_HOST} failed. Please setup passwrodless SSH.
- exit 1
-fi
-
-## If Standby node is down, skip failover.
-if [ $FAILED_NODE_ID -ne $OLD_PRIMARY_NODE_ID ]; then
- logger -i -p local1.info failover.sh: Standby node is down. Skipping failover.
-
- ssh -T -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null postgres@$OLD_PRIMARY_NODE_HOST -i ~/.ssh/id_rsa_pgpool "
- ${PGHOME}/bin/psql -p $OLD_PRIMARY_NODE_PORT -c \"SELECT pg_drop_replication_slot('${FAILED_NODE_HOST}')\"
- "
-
- if [ $? -ne 0 ]; then
- logger -i -p local1.error failover.sh: drop replication slot "${FAILED_NODE_HOST}" failed
- exit 1
- fi
-
- exit 0
-fi
-
-## Promote Standby node.
-logger -i -p local1.info failover.sh: Primary node is down, promote standby node ${NEW_MASTER_NODE_HOST}.
-
-ssh -T -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null \
- postgres@${NEW_MASTER_NODE_HOST} -i ~/.ssh/id_rsa_pgpool ${PGHOME}/bin/pg_ctl -D ${NEW_MASTER_NODE_PGDATA} -w promote
-
-if [ $? -ne 0 ]; then
- logger -i -p local1.error failover.sh: new_master_host=$NEW_MASTER_NODE_HOST promote failed
- exit 1
-fi
-
-logger -i -p local1.info failover.sh: end: new_master_node_id=$NEW_MASTER_NODE_ID started as the primary node
-exit 0
- </programlisting>
- </listitem>
- </itemizedlist>
-
- <itemizedlist>
- <listitem>
- <para>
- /etc/pgpool-II/follow_master.sh
- </para>
- <programlisting>
-#!/bin/bash
-# This script is run after failover_command to synchronize the Standby with the new Primary.
-# First try pg_rewind. If pg_rewind failed, use pg_basebackup.
-
-set -o xtrace
-exec > >(logger -i -p local1.info) 2>&1
-
-# Special values:
-# %d = failed node id
-# %h = failed node hostname
-# %p = failed node port number
-# %D = failed node database cluster path
-# %m = new master node id
-# %H = new master node hostname
-# %M = old master node id
-# %P = old primary node id
-# %r = new master port number
-# %R = new master database cluster path
-# %N = old primary node hostname
-# %S = old primary node port number
-# %% = '%' character
-
-FAILED_NODE_ID="$1"
-FAILED_NODE_HOST="$2"
-FAILED_NODE_PORT="$3"
-FAILED_NODE_PGDATA="$4"
-NEW_MASTER_NODE_ID="$5"
-NEW_MASTER_NODE_HOST="$6"
-OLD_MASTER_NODE_ID="$7"
-OLD_PRIMARY_NODE_ID="$8"
-NEW_MASTER_NODE_PORT="$9"
-NEW_MASTER_NODE_PGDATA="${10}"
-
-PGHOME=/usr/pgsql-11
-ARCHIVEDIR=/var/lib/pgsql/archivedir
-REPLUSER=repl
-PCP_USER=pgpool
-PGPOOL_PATH=/usr/bin
-PCP_PORT=9898
-
-logger -i -p local1.info follow_master.sh: start: Standby node ${FAILED_NODE_ID}
-
-## Test passwrodless SSH
-ssh -T -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null postgres@${NEW_MASTER_NODE_HOST} -i ~/.ssh/id_rsa_pgpool ls /tmp > /dev/null
-
-if [ $? -ne 0 ]; then
- logger -i -p local1.info follow_master.sh: passwrodless SSH to postgres@${NEW_MASTER_NODE_HOST} failed. Please setup passwrodless SSH.
- exit 1
-fi
-
-## Get PostgreSQL major version
-PGVERSION=`${PGHOME}/bin/initdb -V | awk '{print $3}' | sed 's/\..*//' | sed 's/\([0-9]*\)[a-zA-Z].*/\1/'`
-
-if [ $PGVERSION -ge 12 ]; then
-RECOVERYCONF=${FAILED_NODE_PGDATA}/myrecovery.conf
-else
-RECOVERYCONF=${FAILED_NODE_PGDATA}/recovery.conf
-fi
-
-## Check the status of Standby
-ssh -T -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null \
-postgres@${FAILED_NODE_HOST} -i ~/.ssh/id_rsa_pgpool ${PGHOME}/bin/pg_ctl -w -D ${FAILED_NODE_PGDATA} status
-
-
-## If Standby is running, synchronize it with the new Primary.
-if [ $? -eq 0 ]; then
-
- logger -i -p local1.info follow_master.sh: pg_rewind for $FAILED_NODE_ID
-
- # Create replication slot "${FAILED_NODE_HOST}"
- ssh -T -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null postgres@${NEW_MASTER_NODE_HOST} -i ~/.ssh/id_rsa_pgpool "
- ${PGHOME}/bin/psql -p ${NEW_MASTER_NODE_PORT} -c \"SELECT pg_create_physical_replication_slot('${FAILED_NODE_HOST}');\"
- "
-
- ssh -T -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null postgres@${FAILED_NODE_HOST} -i ~/.ssh/id_rsa_pgpool "
-
- set -o errexit
-
- ${PGHOME}/bin/pg_ctl -w -m f -D ${FAILED_NODE_PGDATA} stop
-
- cat > ${RECOVERYCONF} << EOT
-primary_conninfo = 'host=${NEW_MASTER_NODE_HOST} port=${NEW_MASTER_NODE_PORT} user=${REPLUSER} application_name=${FAILED_NODE_HOST} passfile=''/var/lib/pgsql/.pgpass'''
-recovery_target_timeline = 'latest'
-restore_command = 'scp ${NEW_MASTER_NODE_HOST}:${ARCHIVEDIR}/%f %p'
-primary_slot_name = '${FAILED_NODE_HOST}'
-EOT
-
- if [ ${PGVERSION} -ge 12 ]; then
- touch ${FAILED_NODE_PGDATA}/standby.signal
- else
- echo \"standby_mode = 'on'\" >> ${RECOVERYCONF}
- fi
-
- ${PGHOME}/bin/pg_rewind -D ${FAILED_NODE_PGDATA} --source-server=\"user=postgres host=${NEW_MASTER_NODE_HOST} port=${NEW_MASTER_NODE_PORT}\"
-
- "
-
- if [ $? -ne 0 ]; then
- logger -i -p local1.error follow_master.sh: end: pg_rewind failed. Try pg_basebackup.
-
- ssh -T -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null postgres@${FAILED_NODE_HOST} -i ~/.ssh/id_rsa_pgpool "
-
- set -o errexit
-
- # Execute pg_basebackup
- rm -rf ${FAILED_NODE_PGDATA}
- rm -rf ${ARCHIVEDIR}/*
- ${PGHOME}/bin/pg_basebackup -h ${NEW_MASTER_NODE_HOST} -U $REPLUSER -p ${NEW_MASTER_NODE_PORT} -D ${FAILED_NODE_PGDATA} -X stream
-
- if [ ${PGVERSION} -ge 12 ]; then
- sed -i -e \"\\\$ainclude_if_exists = '$(echo ${RECOVERYCONF} | sed -e 's/\//\\\//g')'\" \
- -e \"/^include_if_exists = '$(echo ${RECOVERYCONF} | sed -e 's/\//\\\//g')'/d\" ${FAILED_NODE_PGDATA}/postgresql.conf
- fi
-
- cat > ${RECOVERYCONF} << EOT
-primary_conninfo = 'host=${NEW_MASTER_NODE_HOST} port=${NEW_MASTER_NODE_PORT} user=${REPLUSER} application_name=${FAILED_NODE_HOST} passfile=''/var/lib/pgsql/.pgpass'''
-recovery_target_timeline = 'latest'
-restore_command = 'scp ${NEW_MASTER_NODE_HOST}:${ARCHIVEDIR}/%f %p'
-primary_slot_name = '${FAILED_NODE_HOST}'
-EOT
-
- if [ ${PGVERSION} -ge 12 ]; then
- touch ${FAILED_NODE_PGDATA}/standby.signal
- else
- echo \"standby_mode = 'on'\" >> ${RECOVERYCONF}
- fi
- "
-
- if [ $? -ne 0 ]; then
- # drop replication slot
- ssh -T -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null postgres@${NEW_MASTER_NODE_HOST} -i ~/.ssh/id_rsa_pgpool "
- ${PGHOME}/bin/psql -p ${NEW_MASTER_NODE_PORT} -c \"SELECT pg_drop_replication_slot('${FAILED_NODE_HOST}')\"
- "
-
- logger -i -p local1.error follow_master.sh: end: pg_basebackup failed
- exit 1
- fi
- fi
-
- # start Standby node on ${FAILED_NODE_HOST}
- ssh -T -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null \
- postgres@${FAILED_NODE_HOST} -i ~/.ssh/id_rsa_pgpool $PGHOME/bin/pg_ctl -l /dev/null -w -D ${FAILED_NODE_PGDATA} start
-
- # If start Standby successfully, attach this node
- if [ $? -eq 0 ]; then
-
- # Run pcp_attact_node to attach Standby node to Pgpool-II.
- ${PGPOOL_PATH}/pcp_attach_node -w -h localhost -U $PCP_USER -p ${PCP_PORT} -n ${FAILED_NODE_ID}
-
- if [ $? -ne 0 ]; then
- logger -i -p local1.error follow_master.sh: end: pcp_attach_node failed
- exit 1
- fi
-
- # If start Standby failed, drop replication slot "${FAILED_NODE_HOST}"
- else
-
- ssh -T -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null postgres@${NEW_MASTER_NODE_HOST} -i ~/.ssh/id_rsa_pgpool \
- ${PGHOME}/bin/psql -p ${NEW_MASTER_NODE_PORT} -c "SELECT pg_drop_replication_slot('${FAILED_NODE_HOST}')"
-
- logger -i -p local1.error follow_master.sh: end: follow master command failed
- exit 1
- fi
-
-else
- logger -i -p local1.info follow_master.sh: failed_nod_id=${FAILED_NODE_ID} is not running. skipping follow master command
- exit 0
-fi
-
-logger -i -p local1.info follow_master.sh: end: follow master command complete
-exit 0
- </programlisting>
- </listitem>
- </itemizedlist>
-
</sect3>
<sect3 id="example-cluster-pgpool-config-online-recovery">
<para>
続いて、オンラインリカバリを行うための<productname>PostgreSQL</productname>のユーザ名およびオンラインリカバリ時に呼び出されるコマンド<command>recovery_1st_stage</command>を設定します。
オンラインリカバリで実行される<function>pgpool_recovery</function>関数は<productname>PostgreSQL</productname>のスーパーユーザ権限が必要なため、<varname>recovery_user</varname>に<emphasis>スーパーユーザ</emphasis>を指定しなければなりません。ここでは、postrgesユーザを指定します。
- オンラインリカバリ用のスクリプト<filename>recovery_1st_stage</filename>、<filename>pgpool_remote_start</filename>をプライマリサーバ(server1)のデータベースクラスタ配下に配置し、実行権限を与えておきます。
</para>
<programlisting>
recovery_user = 'postgres'
recovery_1st_stage_command = 'recovery_1st_stage'
</programlisting>
+ <para>
+ オンラインリカバリ用のサンプルスクリプト<ulink url="https://git.postgresql.org/gitweb/?p=pgpool2.git;a=blob_plain;f=src/sample/scripts/recovery_1st_stage.sample;hb=refs/heads/master">recovery_1st_stage</ulink>
+ 及び<ulink url="https://git.postgresql.org/gitweb/?p=pgpool2.git;a=blob_plain;f=src/sample/scripts/pgpool_remote_start.sample;hb=refs/heads/master">pgpool_remote_start</ulink>は
+ <filename>/etc/pgpool-II/</filename>配下にインストールされていますので、これらのファイルをプライマリサーバ(server1)のデータベースクラスタ配下に配置します。
+ </para>
<programlisting>
- [server1]# su - postgres
- [server1]$ vi /var/lib/pgsql/11/data/recovery_1st_stage
- [server1]$ vi /var/lib/pgsql/11/data/pgpool_remote_start
- [server1]$ chmod +x /var/lib/pgsql/11/data/{recovery_1st_stage,pgpool_remote_start}
+ [server1]# cp /etc/pgpool-II/recovery_1st_stage.sample /var/lib/pgsql/11/data/
+ [server1]# cp /etc/pgpool-II/pgpool_remote_start.sample /var/lib/pgsql/11/data/
+ [server1]# chown postgres:postgres /var/lib/pgsql/11/data/{recovery_1st_stage,pgpool_remote_start}
+ </programlisting>
+ <para>
+ 基本的には<emphasis>PGHOME</emphasis>を環境に合わせて変更すれば、動作します。
+ </para>
+ <programlisting>
+ [server1]# vi /var/lib/pgsql/11/data/recovery_1st_stage
+ ...
+ PGHOME=/usr/pgsql-11
+ ...
+
+ [server1]# vi /var/lib/pgsql/11/data/pgpool_remote_start
+ ...
+ PGHOME=/usr/pgsql-11
+ ...
</programlisting>
-
- <itemizedlist>
- <listitem>
- <para>
- /var/lib/pgsql/11/data/recovery_1st_stage
- </para>
- <programlisting>
-#!/bin/bash
-# This script is executed by "recovery_1st_stage" to recovery a Standby node.
-
-set -o xtrace
-exec > >(logger -i -p local1.info) 2>&1
-
-PRIMARY_NODE_PGDATA="$1"
-DEST_NODE_HOST="$2"
-DEST_NODE_PGDATA="$3"
-PRIMARY_NODE_PORT="$4"
-DEST_NODE_ID="$5"
-DEST_NODE_PORT="$6"
-
-PRIMARY_NODE_HOST=$(hostname)
-PGHOME=/usr/pgsql-11
-ARCHIVEDIR=/var/lib/pgsql/archivedir
-REPLUSER=repl
-
-logger -i -p local1.info recovery_1st_stage: start: pg_basebackup for Standby node $DEST_NODE_ID
-
-## Test passwrodless SSH
-ssh -T -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null postgres@${DEST_NODE_HOST} -i ~/.ssh/id_rsa_pgpool ls /tmp > /dev/null
-
-if [ $? -ne 0 ]; then
- logger -i -p local1.info recovery_1st_stage: passwrodless SSH to postgres@${DEST_NODE_HOST} failed. Please setup passwrodless SSH.
- exit 1
-fi
-
-## Get PostgreSQL major version
-PGVERSION=`${PGHOME}/bin/initdb -V | awk '{print $3}' | sed 's/\..*//' | sed 's/\([0-9]*\)[a-zA-Z].*/\1/'`
-if [ $PGVERSION -ge 12 ]; then
- RECOVERYCONF=${DEST_NODE_PGDATA}/myrecovery.conf
-else
- RECOVERYCONF=${DEST_NODE_PGDATA}/recovery.conf
-fi
-
-## Create replication slot "${DEST_NODE_HOST}"
-${PGHOME}/bin/psql -p ${PRIMARY_NODE_PORT} << EOQ
-SELECT pg_create_physical_replication_slot('${DEST_NODE_HOST}');
-EOQ
-
-## Execute pg_basebackup to recovery Standby node
-ssh -T -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null postgres@$DEST_NODE_HOST -i ~/.ssh/id_rsa_pgpool "
-
- set -o errexit
-
- rm -rf $DEST_NODE_PGDATA
- rm -rf $ARCHIVEDIR/*
-
- ${PGHOME}/bin/pg_basebackup -h $PRIMARY_NODE_HOST -U $REPLUSER -p $PRIMARY_NODE_PORT -D $DEST_NODE_PGDATA -X stream
-
- if [ ${PGVERSION} -ge 12 ]; then
- sed -i -e \"\\\$ainclude_if_exists = '$(echo ${RECOVERYCONF} | sed -e 's/\//\\\//g')'\" \
- -e \"/^include_if_exists = '$(echo ${RECOVERYCONF} | sed -e 's/\//\\\//g')'/d\" ${DEST_NODE_PGDATA}/postgresql.conf
- fi
-
- cat > ${RECOVERYCONF} << EOT
-primary_conninfo = 'host=${PRIMARY_NODE_HOST} port=${PRIMARY_NODE_PORT} user=${REPLUSER} application_name=${DEST_NODE_HOST} passfile=''/var/lib/pgsql/.pgpass'''
-recovery_target_timeline = 'latest'
-restore_command = 'scp ${PRIMARY_NODE_HOST}:${ARCHIVEDIR}/%f %p'
-primary_slot_name = '${DEST_NODE_HOST}'
-EOT
-
- if [ ${PGVERSION} -ge 12 ]; then
- touch ${DEST_NODE_PGDATA}/standby.signal
- else
- echo \"standby_mode = 'on'\" >> ${RECOVERYCONF}
- fi
-
- sed -i \"s/#*port = .*/port = ${DEST_NODE_PORT}/\" ${DEST_NODE_PGDATA}/postgresql.conf
-"
-
-if [ $? -ne 0 ]; then
-
- ${PGHOME}/bin/psql -p ${PRIMARY_NODE_PORT} << EOQ
-SELECT pg_drop_replication_slot('${DEST_NODE_HOST}');
-EOQ
-
- logger -i -p local1.error recovery_1st_stage: end: pg_basebackup failed. online recovery failed
- exit 1
-fi
-
-logger -i -p local1.info recovery_1st_stage: end: recovery_1st_stage complete
-exit 0
- </programlisting>
- </listitem>
- <listitem>
-
- <para>
- /var/lib/pgsql/11/data/pgpool_remote_start
- </para>
- <programlisting>
-#!/bin/bash
-# This script is run after recovery_1st_stage to start Standby node.
-
-set -o xtrace
-exec > >(logger -i -p local1.info) 2>&1
-
-PGHOME=/usr/pgsql-11
-DEST_NODE_HOST="$1"
-DEST_NODE_PGDATA="$2"
-
-
-logger -i -p local1.info pgpool_remote_start: start: remote start Standby node $DEST_NODE_HOST
-
-## Test passwrodless SSH
-ssh -T -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null postgres@${DEST_NODE_HOST} -i ~/.ssh/id_rsa_pgpool ls /tmp > /dev/null
-
-if [ $? -ne 0 ]; then
- logger -i -p local1.info pgpool_remote_start: passwrodless SSH to postgres@${DEST_NODE_HOST} failed. Please setup passwrodless SSH.
- exit 1
-fi
-
-## Start Standby node
-ssh -T -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null postgres@$DEST_NODE_HOST -i ~/.ssh/id_rsa_pgpool "
- $PGHOME/bin/pg_ctl -l /dev/null -w -D $DEST_NODE_PGDATA start
-"
-
-if [ $? -ne 0 ]; then
- logger -i -p local1.error pgpool_remote_start: $DEST_NODE_HOST PostgreSQL start failed.
- exit 1
-fi
-
-logger -i -p local1.info pgpool_remote_start: end: $DEST_NODE_HOST PostgreSQL started successfully.
-exit 0
- </programlisting>
- </listitem>
- </itemizedlist>
<para>
また、オンラインリカバリ機能を使用するには、<function>pgpool_recovery</function>、<function>pgpool_remote_start</function>、<function>pgpool_switch_xlog</function>という関数が必要になるので、<literal>server1</literal>のtemplate1に<function>pgpool_recovery</function>をインストールしておきます。
# - Other pgpool Connection Settings -
other_pgpool_hostname0 = 'server2'
- # Host name or IP address to connect to for other pgpool 0
- # (change requires restart)
+ # Host name or IP address to connect to for other pgpool 0
+ # (change requires restart)
other_pgpool_port0 = 9999
- # Port number for other pgpool 0
- # (change requires restart)
+ # Port number for other pgpool 0
+ # (change requires restart)
other_wd_port0 = 9000
- # Port number for other watchdog 0
- # (change requires restart)
+ # Port number for other watchdog 0
+ # (change requires restart)
other_pgpool_hostname1 = 'server3'
other_pgpool_port1 = 9999
other_wd_port1 = 9000
# - Other pgpool Connection Settings -
other_pgpool_hostname0 = 'server1'
- # Host name or IP address to connect to for other pgpool 0
- # (change requires restart)
+ # Host name or IP address to connect to for other pgpool 0
+ # (change requires restart)
other_pgpool_port0 = 9999
- # Port number for other pgpool 0
- # (change requires restart)
+ # Port number for other pgpool 0
+ # (change requires restart)
other_wd_port0 = 9000
- # Port number for other watchdog 0
- # (change requires restart)
+ # Port number for other watchdog 0
+ # (change requires restart)
other_pgpool_hostname1 = 'server3'
other_pgpool_port1 = 9999
other_wd_port1 = 9000
# - Other pgpool Connection Settings -
other_pgpool_hostname0 = 'server1'
- # Host name or IP address to connect to for other pgpool 0
- # (change requires restart)
+ # Host name or IP address to connect to for other pgpool 0
+ # (change requires restart)
other_pgpool_port0 = 9999
- # Port number for other pgpool 0
- # (change requires restart)
+ # Port number for other pgpool 0
+ # (change requires restart)
other_wd_port0 = 9000
- # Port number for other watchdog 0
- # (change requires restart)
+ # Port number for other watchdog 0
+ # (change requires restart)
other_pgpool_hostname1 = 'server2'
other_pgpool_port1 = 9999
other_wd_port1 = 9000
</para>
<programlisting>
heartbeat_destination0 = 'server2'
- # Host name or IP address of destination 0
- # for sending heartbeat signal.
- # (change requires restart)
+ # Host name or IP address of destination 0
+ # for sending heartbeat signal.
+ # (change requires restart)
heartbeat_destination_port0 = 9694
- # Port number of destination 0 for sending
- # heartbeat signal. Usually this is the
- # same as wd_heartbeat_port.
- # (change requires restart)
+ # Port number of destination 0 for sending
+ # heartbeat signal. Usually this is the
+ # same as wd_heartbeat_port.
+ # (change requires restart)
heartbeat_device0 = ''
- # Name of NIC device (such like 'eth0')
- # used for sending/receiving heartbeat
- # signal to/from destination 0.
- # This works only when this is not empty
- # and pgpool has root privilege.
- # (change requires restart)
+ # Name of NIC device (such like 'eth0')
+ # used for sending/receiving heartbeat
+ # signal to/from destination 0.
+ # This works only when this is not empty
+ # and pgpool has root privilege.
+ # (change requires restart)
heartbeat_destination1 = 'server3'
heartbeat_destination_port1 = 9694
</para>
<programlisting>
heartbeat_destination0 = 'server1'
- # Host name or IP address of destination 0
- # for sending heartbeat signal.
- # (change requires restart)
+ # Host name or IP address of destination 0
+ # for sending heartbeat signal.
+ # (change requires restart)
heartbeat_destination_port0 = 9694
- # Port number of destination 0 for sending
- # heartbeat signal. Usually this is the
- # same as wd_heartbeat_port.
- # (change requires restart)
+ # Port number of destination 0 for sending
+ # heartbeat signal. Usually this is the
+ # same as wd_heartbeat_port.
+ # (change requires restart)
heartbeat_device0 = ''
- # Name of NIC device (such like 'eth0')
- # used for sending/receiving heartbeat
- # signal to/from destination 0.
- # This works only when this is not empty
- # and pgpool has root privilege.
- # (change requires restart)
+ # Name of NIC device (such like 'eth0')
+ # used for sending/receiving heartbeat
+ # signal to/from destination 0.
+ # This works only when this is not empty
+ # and pgpool has root privilege.
+ # (change requires restart)
heartbeat_destination1 = 'server3'
heartbeat_destination_port1 = 9694
</para>
<programlisting>
heartbeat_destination0 = 'server1'
- # Host name or IP address of destination 0
- # for sending heartbeat signal.
- # (change requires restart)
+ # Host name or IP address of destination 0
+ # for sending heartbeat signal.
+ # (change requires restart)
heartbeat_destination_port0 = 9694
- # Port number of destination 0 for sending
- # heartbeat signal. Usually this is the
- # same as wd_heartbeat_port.
- # (change requires restart)
+ # Port number of destination 0 for sending
+ # heartbeat signal. Usually this is the
+ # same as wd_heartbeat_port.
+ # (change requires restart)
heartbeat_device0 = ''
- # Name of NIC device (such like 'eth0')
- # used for sending/receiving heartbeat
- # signal to/from destination 0.
- # This works only when this is not empty
- # and pgpool has root privilege.
- # (change requires restart)
+ # Name of NIC device (such like 'eth0')
+ # used for sending/receiving heartbeat
+ # signal to/from destination 0.
+ # This works only when this is not empty
+ # and pgpool has root privilege.
+ # (change requires restart)
heartbeat_destination1 = 'server2'
heartbeat_destination_port1 = 9694
</para>
<programlisting>
health_check_period = 5
- # Health check period
- # Disabled (0) by default
+ # Health check period
+ # Disabled (0) by default
health_check_timeout = 30
- # Health check timeout
- # 0 means no timeout
+ # Health check timeout
+ # 0 means no timeout
health_check_user = 'pgpool'
health_check_password = ''
# - Backend Connection Settings -
backend_hostname0 = 'server1'
- # Host name or IP address to connect to for backend 0
+ # Host name or IP address to connect to for backend 0
backend_port0 = 5432
- # Port number for backend 0
+ # Port number for backend 0
backend_weight0 = 1
- # Weight for backend 0 (only in load balancing mode)
+ # Weight for backend 0 (only in load balancing mode)
backend_data_directory0 = '/var/lib/pgsql/11/data'
- # Data directory for backend 0
+ # Data directory for backend 0
backend_flag0 = 'ALLOW_TO_FAILOVER'
- # Controls various backend behavior
- # ALLOW_TO_FAILOVER or DISALLOW_TO_FAILOVER
+ # Controls various backend behavior
+ # ALLOW_TO_FAILOVER or DISALLOW_TO_FAILOVER
backend_hostname1 = 'server2'
backend_port1 = 5432
backend_weight1 = 1
</para>
</note>
<para>
- Create <filename>/etc/pgpool-II/failover.sh</filename>, and add execute permission.
+ Sample scripts <ulink url="https://git.postgresql.org/gitweb/?p=pgpool2.git;a=blob_plain;f=src/sample/scripts/failover.sh.sample;hb=refs/heads/master">failover.sh</ulink>
+ and <ulink url="https://git.postgresql.org/gitweb/?p=pgpool2.git;a=blob_plain;f=src/sample/scripts/follow_master.sh.sample;hb=refs/heads/master">follow_master.sh</ulink>
+ are installed in <filename>/etc/pgpool-II/</filename>. Create failover scripts using these sample files.
</para>
<programlisting>
- # vi /etc/pgpool-II/failover.sh
- # vi /etc/pgpool-II/follow_master.sh
- # chmod +x /etc/pgpool-II/{failover.sh,follow_master.sh}
+ # cp /etc/pgpool-II/failover.sh{.sample,}
+ # cp /etc/pgpool-II/follow_master.sh{.sample,}
</programlisting>
+ <para>
+ Basically, it should work if you change <emphasis>PGHOME</emphasis> according to PostgreSQL installation directory.
+ </para>
+ <programlisting>
+ [server1]# vi /etc/pgpool-II/failover.sh
+ ...
+ PGHOME=/usr/pgsql-11
+ ...
- <itemizedlist>
- <listitem>
- <para>
- /etc/pgpool-II/failover.sh
- </para>
- <programlisting>
-#!/bin/bash
-# This script is run by failover_command.
-
-set -o xtrace
-exec > >(logger -i -p local1.info) 2>&1
-
-# Special values:
-# %d = failed node id
-# %h = failed node hostname
-# %p = failed node port number
-# %D = failed node database cluster path
-# %m = new master node id
-# %H = new master node hostname
-# %M = old master node id
-# %P = old primary node id
-# %r = new master port number
-# %R = new master database cluster path
-# %N = old primary node hostname
-# %S = old primary node port number
-# %% = '%' character
-
-FAILED_NODE_ID="$1"
-FAILED_NODE_HOST="$2"
-FAILED_NODE_PORT="$3"
-FAILED_NODE_PGDATA="$4"
-NEW_MASTER_NODE_ID="$5"
-NEW_MASTER_NODE_HOST="$6"
-OLD_MASTER_NODE_ID="$7"
-OLD_PRIMARY_NODE_ID="$8"
-NEW_MASTER_NODE_PORT="$9"
-NEW_MASTER_NODE_PGDATA="${10}"
-OLD_PRIMARY_NODE_HOST="${11}"
-OLD_PRIMARY_NODE_PORT="${12}"
-
-PGHOME=/usr/pgsql-11
-
-
-logger -i -p local1.info failover.sh: start: failed_node_id=$FAILED_NODE_ID old_primary_node_id=$OLD_PRIMARY_NODE_ID failed_host=$FAILED_NODE_HOST new_master_host=$NEW_MASTER_NODE_HOST
-
-## If there's no master node anymore, skip failover.
-if [ $NEW_MASTER_NODE_ID -lt 0 ]; then
- logger -i -p local1.info failover.sh: All nodes are down. Skipping failover.
- exit 0
-fi
-
-## Test passwrodless SSH
-ssh -T -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null postgres@${NEW_MASTER_NODE_HOST} -i ~/.ssh/id_rsa_pgpool ls /tmp > /dev/null
-
-if [ $? -ne 0 ]; then
- logger -i -p local1.info failover.sh: passwrodless SSH to postgres@${NEW_MASTER_NODE_HOST} failed. Please setup passwrodless SSH.
- exit 1
-fi
-
-## If Standby node is down, skip failover.
-if [ $FAILED_NODE_ID -ne $OLD_PRIMARY_NODE_ID ]; then
- logger -i -p local1.info failover.sh: Standby node is down. Skipping failover.
-
- ssh -T -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null postgres@$OLD_PRIMARY_NODE_HOST -i ~/.ssh/id_rsa_pgpool "
- ${PGHOME}/bin/psql -p $OLD_PRIMARY_NODE_PORT -c \"SELECT pg_drop_replication_slot('${FAILED_NODE_HOST}')\"
- "
-
- if [ $? -ne 0 ]; then
- logger -i -p local1.error failover.sh: drop replication slot "${FAILED_NODE_HOST}" failed
- exit 1
- fi
-
- exit 0
-fi
-
-## Promote Standby node.
-logger -i -p local1.info failover.sh: Primary node is down, promote standby node ${NEW_MASTER_NODE_HOST}.
-
-ssh -T -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null \
- postgres@${NEW_MASTER_NODE_HOST} -i ~/.ssh/id_rsa_pgpool ${PGHOME}/bin/pg_ctl -D ${NEW_MASTER_NODE_PGDATA} -w promote
-
-if [ $? -ne 0 ]; then
- logger -i -p local1.error failover.sh: new_master_host=$NEW_MASTER_NODE_HOST promote failed
- exit 1
-fi
-
-logger -i -p local1.info failover.sh: end: new_master_node_id=$NEW_MASTER_NODE_ID started as the primary node
-exit 0
- </programlisting>
- </listitem>
- </itemizedlist>
-
- <itemizedlist>
- <listitem>
- <para>
- /etc/pgpool-II/follow_master.sh
- </para>
- <programlisting>
-#!/bin/bash
-# This script is run after failover_command to synchronize the Standby with the new Primary.
-# First try pg_rewind. If pg_rewind failed, use pg_basebackup.
-
-set -o xtrace
-exec > >(logger -i -p local1.info) 2>&1
-
-# Special values:
-# %d = failed node id
-# %h = failed node hostname
-# %p = failed node port number
-# %D = failed node database cluster path
-# %m = new master node id
-# %H = new master node hostname
-# %M = old master node id
-# %P = old primary node id
-# %r = new master port number
-# %R = new master database cluster path
-# %N = old primary node hostname
-# %S = old primary node port number
-# %% = '%' character
-
-FAILED_NODE_ID="$1"
-FAILED_NODE_HOST="$2"
-FAILED_NODE_PORT="$3"
-FAILED_NODE_PGDATA="$4"
-NEW_MASTER_NODE_ID="$5"
-NEW_MASTER_NODE_HOST="$6"
-OLD_MASTER_NODE_ID="$7"
-OLD_PRIMARY_NODE_ID="$8"
-NEW_MASTER_NODE_PORT="$9"
-NEW_MASTER_NODE_PGDATA="${10}"
-
-PGHOME=/usr/pgsql-11
-ARCHIVEDIR=/var/lib/pgsql/archivedir
-REPLUSER=repl
-PCP_USER=pgpool
-PGPOOL_PATH=/usr/bin
-PCP_PORT=9898
-
-logger -i -p local1.info follow_master.sh: start: Standby node ${FAILED_NODE_ID}
-
-## Test passwrodless SSH
-ssh -T -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null postgres@${NEW_MASTER_NODE_HOST} -i ~/.ssh/id_rsa_pgpool ls /tmp > /dev/null
-
-if [ $? -ne 0 ]; then
- logger -i -p local1.info follow_master.sh: passwrodless SSH to postgres@${NEW_MASTER_NODE_HOST} failed. Please setup passwrodless SSH.
- exit 1
-fi
-
-## Get PostgreSQL major version
-PGVERSION=`${PGHOME}/bin/initdb -V | awk '{print $3}' | sed 's/\..*//' | sed 's/\([0-9]*\)[a-zA-Z].*/\1/'`
-
-if [ $PGVERSION -ge 12 ]; then
-RECOVERYCONF=${FAILED_NODE_PGDATA}/myrecovery.conf
-else
-RECOVERYCONF=${FAILED_NODE_PGDATA}/recovery.conf
-fi
-
-## Check the status of Standby
-ssh -T -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null \
-postgres@${FAILED_NODE_HOST} -i ~/.ssh/id_rsa_pgpool ${PGHOME}/bin/pg_ctl -w -D ${FAILED_NODE_PGDATA} status
-
-
-## If Standby is running, synchronize it with the new Primary.
-if [ $? -eq 0 ]; then
-
- logger -i -p local1.info follow_master.sh: pg_rewind for $FAILED_NODE_ID
-
- # Create replication slot "${FAILED_NODE_HOST}"
- ssh -T -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null postgres@${NEW_MASTER_NODE_HOST} -i ~/.ssh/id_rsa_pgpool "
- ${PGHOME}/bin/psql -p ${NEW_MASTER_NODE_PORT} -c \"SELECT pg_create_physical_replication_slot('${FAILED_NODE_HOST}');\"
- "
-
- ssh -T -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null postgres@${FAILED_NODE_HOST} -i ~/.ssh/id_rsa_pgpool "
-
- set -o errexit
-
- ${PGHOME}/bin/pg_ctl -w -m f -D ${FAILED_NODE_PGDATA} stop
-
- cat > ${RECOVERYCONF} << EOT
-primary_conninfo = 'host=${NEW_MASTER_NODE_HOST} port=${NEW_MASTER_NODE_PORT} user=${REPLUSER} application_name=${FAILED_NODE_HOST} passfile=''/var/lib/pgsql/.pgpass'''
-recovery_target_timeline = 'latest'
-restore_command = 'scp ${NEW_MASTER_NODE_HOST}:${ARCHIVEDIR}/%f %p'
-primary_slot_name = '${FAILED_NODE_HOST}'
-EOT
-
- if [ ${PGVERSION} -ge 12 ]; then
- touch ${FAILED_NODE_PGDATA}/standby.signal
- else
- echo \"standby_mode = 'on'\" >> ${RECOVERYCONF}
- fi
-
- ${PGHOME}/bin/pg_rewind -D ${FAILED_NODE_PGDATA} --source-server=\"user=postgres host=${NEW_MASTER_NODE_HOST} port=${NEW_MASTER_NODE_PORT}\"
-
- "
-
- if [ $? -ne 0 ]; then
- logger -i -p local1.error follow_master.sh: end: pg_rewind failed. Try pg_basebackup.
-
- ssh -T -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null postgres@${FAILED_NODE_HOST} -i ~/.ssh/id_rsa_pgpool "
-
- set -o errexit
-
- # Execute pg_basebackup
- rm -rf ${FAILED_NODE_PGDATA}
- rm -rf ${ARCHIVEDIR}/*
- ${PGHOME}/bin/pg_basebackup -h ${NEW_MASTER_NODE_HOST} -U $REPLUSER -p ${NEW_MASTER_NODE_PORT} -D ${FAILED_NODE_PGDATA} -X stream
-
- if [ ${PGVERSION} -ge 12 ]; then
- sed -i -e \"\\\$ainclude_if_exists = '$(echo ${RECOVERYCONF} | sed -e 's/\//\\\//g')'\" \
- -e \"/^include_if_exists = '$(echo ${RECOVERYCONF} | sed -e 's/\//\\\//g')'/d\" ${FAILED_NODE_PGDATA}/postgresql.conf
- fi
-
- cat > ${RECOVERYCONF} << EOT
-primary_conninfo = 'host=${NEW_MASTER_NODE_HOST} port=${NEW_MASTER_NODE_PORT} user=${REPLUSER} application_name=${FAILED_NODE_HOST} passfile=''/var/lib/pgsql/.pgpass'''
-recovery_target_timeline = 'latest'
-restore_command = 'scp ${NEW_MASTER_NODE_HOST}:${ARCHIVEDIR}/%f %p'
-primary_slot_name = '${FAILED_NODE_HOST}'
-EOT
-
- if [ ${PGVERSION} -ge 12 ]; then
- touch ${FAILED_NODE_PGDATA}/standby.signal
- else
- echo \"standby_mode = 'on'\" >> ${RECOVERYCONF}
- fi
- "
-
- if [ $? -ne 0 ]; then
- # drop replication slot
- ssh -T -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null postgres@${NEW_MASTER_NODE_HOST} -i ~/.ssh/id_rsa_pgpool "
- ${PGHOME}/bin/psql -p ${NEW_MASTER_NODE_PORT} -c \"SELECT pg_drop_replication_slot('${FAILED_NODE_HOST}')\"
- "
-
- logger -i -p local1.error follow_master.sh: end: pg_basebackup failed
- exit 1
- fi
- fi
-
- # start Standby node on ${FAILED_NODE_HOST}
- ssh -T -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null \
- postgres@${FAILED_NODE_HOST} -i ~/.ssh/id_rsa_pgpool $PGHOME/bin/pg_ctl -l /dev/null -w -D ${FAILED_NODE_PGDATA} start
-
- # If start Standby successfully, attach this node
- if [ $? -eq 0 ]; then
-
- # Run pcp_attact_node to attach Standby node to Pgpool-II.
- ${PGPOOL_PATH}/pcp_attach_node -w -h localhost -U $PCP_USER -p ${PCP_PORT} -n ${FAILED_NODE_ID}
-
- if [ $? -ne 0 ]; then
- logger -i -p local1.error follow_master.sh: end: pcp_attach_node failed
- exit 1
- fi
-
- # If start Standby failed, drop replication slot "${FAILED_NODE_HOST}"
- else
-
- ssh -T -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null postgres@${NEW_MASTER_NODE_HOST} -i ~/.ssh/id_rsa_pgpool \
- ${PGHOME}/bin/psql -p ${NEW_MASTER_NODE_PORT} -c "SELECT pg_drop_replication_slot('${FAILED_NODE_HOST}')"
-
- logger -i -p local1.error follow_master.sh: end: follow master command failed
- exit 1
- fi
-
-else
- logger -i -p local1.info follow_master.sh: failed_nod_id=${FAILED_NODE_ID} is not running. skipping follow master command
- exit 0
-fi
-
-logger -i -p local1.info follow_master.sh: end: follow master command complete
-exit 0
- </programlisting>
- </listitem>
- </itemizedlist>
-
+ [server1]# vi /etc/pgpool-II/follow_master.sh
+ ...
+ PGHOME=/usr/pgsql-11
+ ...
+ </programlisting>
</sect3>
<sect3 id="example-cluster-pgpool-config-online-recovery">
</para>
<programlisting>
recovery_user = 'postgres'
- # Online recovery user
+ # Online recovery user
recovery_password = ''
- # Online recovery password
+ # Online recovery password
recovery_1st_stage_command = 'recovery_1st_stage'
</programlisting>
+ <para>
+ Online recovery sample scripts<ulink url="https://git.postgresql.org/gitweb/?p=pgpool2.git;a=blob_plain;f=src/sample/scripts/recovery_1st_stage.sample;hb=refs/heads/master">recovery_1st_stage</ulink>
+ and <ulink url="https://git.postgresql.org/gitweb/?p=pgpool2.git;a=blob_plain;f=src/sample/scripts/pgpool_remote_start.sample;hb=refs/heads/master">pgpool_remote_start</ulink>
+ are installed in <filename>/etc/pgpool-II/</filename>. Copy these files to the data directory of the primary server (server1).
+ </para>
<programlisting>
- [server1]# su - postgres
- [server1]$ vi /var/lib/pgsql/11/data/recovery_1st_stage
- [server1]$ vi /var/lib/pgsql/11/data/pgpool_remote_start
- [server1]$ chmod +x /var/lib/pgsql/11/data/{recovery_1st_stage,pgpool_remote_start}
+ [server1]# cp /etc/pgpool-II/recovery_1st_stage.sample /var/lib/pgsql/11/data/
+ [server1]# cp /etc/pgpool-II/pgpool_remote_start.sample /var/lib/pgsql/11/data/
+ [server1]# chown postgres:postgres /var/lib/pgsql/11/data/{recovery_1st_stage,pgpool_remote_start}
</programlisting>
+ <para>
+ Basically, it should work if you change <emphasis>PGHOME</emphasis> according to PostgreSQL installation directory.
+ </para>
+ <programlisting>
+ [server1]# vi /var/lib/pgsql/11/data/recovery_1st_stage
+ ...
+ PGHOME=/usr/pgsql-11
+ ...
- <itemizedlist>
- <listitem>
- <para>
- /var/lib/pgsql/11/data/recovery_1st_stage
- </para>
- <programlisting>
-#!/bin/bash
-# This script is executed by "recovery_1st_stage" to recovery a Standby node.
-
-set -o xtrace
-exec > >(logger -i -p local1.info) 2>&1
-
-PRIMARY_NODE_PGDATA="$1"
-DEST_NODE_HOST="$2"
-DEST_NODE_PGDATA="$3"
-PRIMARY_NODE_PORT="$4"
-DEST_NODE_ID="$5"
-DEST_NODE_PORT="$6"
-
-PRIMARY_NODE_HOST=$(hostname)
-PGHOME=/usr/pgsql-11
-ARCHIVEDIR=/var/lib/pgsql/archivedir
-REPLUSER=repl
-
-logger -i -p local1.info recovery_1st_stage: start: pg_basebackup for Standby node $DEST_NODE_ID
-
-## Test passwrodless SSH
-ssh -T -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null postgres@${DEST_NODE_HOST} -i ~/.ssh/id_rsa_pgpool ls /tmp > /dev/null
-
-if [ $? -ne 0 ]; then
- logger -i -p local1.info recovery_1st_stage: passwrodless SSH to postgres@${DEST_NODE_HOST} failed. Please setup passwrodless SSH.
- exit 1
-fi
-
-## Get PostgreSQL major version
-PGVERSION=`${PGHOME}/bin/initdb -V | awk '{print $3}' | sed 's/\..*//' | sed 's/\([0-9]*\)[a-zA-Z].*/\1/'`
-if [ $PGVERSION -ge 12 ]; then
- RECOVERYCONF=${DEST_NODE_PGDATA}/myrecovery.conf
-else
- RECOVERYCONF=${DEST_NODE_PGDATA}/recovery.conf
-fi
-
-## Create replication slot "${DEST_NODE_HOST}"
-${PGHOME}/bin/psql -p ${PRIMARY_NODE_PORT} << EOQ
-SELECT pg_create_physical_replication_slot('${DEST_NODE_HOST}');
-EOQ
-
-## Execute pg_basebackup to recovery Standby node
-ssh -T -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null postgres@$DEST_NODE_HOST -i ~/.ssh/id_rsa_pgpool "
-
- set -o errexit
-
- rm -rf $DEST_NODE_PGDATA
- rm -rf $ARCHIVEDIR/*
-
- ${PGHOME}/bin/pg_basebackup -h $PRIMARY_NODE_HOST -U $REPLUSER -p $PRIMARY_NODE_PORT -D $DEST_NODE_PGDATA -X stream
-
- if [ ${PGVERSION} -ge 12 ]; then
- sed -i -e \"\\\$ainclude_if_exists = '$(echo ${RECOVERYCONF} | sed -e 's/\//\\\//g')'\" \
- -e \"/^include_if_exists = '$(echo ${RECOVERYCONF} | sed -e 's/\//\\\//g')'/d\" ${DEST_NODE_PGDATA}/postgresql.conf
- fi
-
- cat > ${RECOVERYCONF} << EOT
-primary_conninfo = 'host=${PRIMARY_NODE_HOST} port=${PRIMARY_NODE_PORT} user=${REPLUSER} application_name=${DEST_NODE_HOST} passfile=''/var/lib/pgsql/.pgpass'''
-recovery_target_timeline = 'latest'
-restore_command = 'scp ${PRIMARY_NODE_HOST}:${ARCHIVEDIR}/%f %p'
-primary_slot_name = '${DEST_NODE_HOST}'
-EOT
-
- if [ ${PGVERSION} -ge 12 ]; then
- touch ${DEST_NODE_PGDATA}/standby.signal
- else
- echo \"standby_mode = 'on'\" >> ${RECOVERYCONF}
- fi
-
- sed -i \"s/#*port = .*/port = ${DEST_NODE_PORT}/\" ${DEST_NODE_PGDATA}/postgresql.conf
-"
-
-if [ $? -ne 0 ]; then
-
- ${PGHOME}/bin/psql -p ${PRIMARY_NODE_PORT} << EOQ
-SELECT pg_drop_replication_slot('${DEST_NODE_HOST}');
-EOQ
-
- logger -i -p local1.error recovery_1st_stage: end: pg_basebackup failed. online recovery failed
- exit 1
-fi
-
-logger -i -p local1.info recovery_1st_stage: end: recovery_1st_stage complete
-exit 0
- </programlisting>
- </listitem>
- <listitem>
-
- <para>
- /var/lib/pgsql/11/data/pgpool_remote_start
- </para>
- <programlisting>
-#!/bin/bash
-# This script is run after recovery_1st_stage to start Standby node.
-
-set -o xtrace
-exec > >(logger -i -p local1.info) 2>&1
-
-PGHOME=/usr/pgsql-11
-DEST_NODE_HOST="$1"
-DEST_NODE_PGDATA="$2"
-
-
-logger -i -p local1.info pgpool_remote_start: start: remote start Standby node $DEST_NODE_HOST
-
-## Test passwrodless SSH
-ssh -T -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null postgres@${DEST_NODE_HOST} -i ~/.ssh/id_rsa_pgpool ls /tmp > /dev/null
-
-if [ $? -ne 0 ]; then
- logger -i -p local1.info pgpool_remote_start: passwrodless SSH to postgres@${DEST_NODE_HOST} failed. Please setup passwrodless SSH.
- exit 1
-fi
-
-## Start Standby node
-ssh -T -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null postgres@$DEST_NODE_HOST -i ~/.ssh/id_rsa_pgpool "
- $PGHOME/bin/pg_ctl -l /dev/null -w -D $DEST_NODE_PGDATA start
-"
-
-if [ $? -ne 0 ]; then
- logger -i -p local1.error pgpool_remote_start: $DEST_NODE_HOST PostgreSQL start failed.
- exit 1
-fi
-
-logger -i -p local1.info pgpool_remote_start: end: $DEST_NODE_HOST PostgreSQL started successfully.
-exit 0
- </programlisting>
- </listitem>
- </itemizedlist>
+ [server1]# vi /var/lib/pgsql/11/data/pgpool_remote_start
+ ...
+ PGHOME=/usr/pgsql-11
+ ...
+ </programlisting>
<para>
In order to use the online recovery functionality, the functions of
# - Other pgpool Connection Settings -
other_pgpool_hostname0 = 'server2'
- # Host name or IP address to connect to for other pgpool 0
- # (change requires restart)
+ # Host name or IP address to connect to for other pgpool 0
+ # (change requires restart)
other_pgpool_port0 = 9999
- # Port number for other pgpool 0
- # (change requires restart)
+ # Port number for other pgpool 0
+ # (change requires restart)
other_wd_port0 = 9000
- # Port number for other watchdog 0
- # (change requires restart)
+ # Port number for other watchdog 0
+ # (change requires restart)
other_pgpool_hostname1 = 'server3'
other_pgpool_port1 = 9999
other_wd_port1 = 9000
# - Other pgpool Connection Settings -
other_pgpool_hostname0 = 'server1'
- # Host name or IP address to connect to for other pgpool 0
- # (change requires restart)
+ # Host name or IP address to connect to for other pgpool 0
+ # (change requires restart)
other_pgpool_port0 = 9999
- # Port number for other pgpool 0
- # (change requires restart)
+ # Port number for other pgpool 0
+ # (change requires restart)
other_wd_port0 = 9000
- # Port number for other watchdog 0
- # (change requires restart)
+ # Port number for other watchdog 0
+ # (change requires restart)
other_pgpool_hostname1 = 'server3'
other_pgpool_port1 = 9999
other_wd_port1 = 9000
# - Other pgpool Connection Settings -
other_pgpool_hostname0 = 'server1'
- # Host name or IP address to connect to for other pgpool 0
- # (change requires restart)
+ # Host name or IP address to connect to for other pgpool 0
+ # (change requires restart)
other_pgpool_port0 = 9999
- # Port number for other pgpool 0
- # (change requires restart)
+ # Port number for other pgpool 0
+ # (change requires restart)
other_wd_port0 = 9000
- # Port number for other watchdog 0
- # (change requires restart)
+ # Port number for other watchdog 0
+ # (change requires restart)
other_pgpool_hostname1 = 'server2'
other_pgpool_port1 = 9999
other_wd_port1 = 9000
</para>
<programlisting>
heartbeat_destination0 = 'server2'
- # Host name or IP address of destination 0
- # for sending heartbeat signal.
- # (change requires restart)
+ # Host name or IP address of destination 0
+ # for sending heartbeat signal.
+ # (change requires restart)
heartbeat_destination_port0 = 9694
- # Port number of destination 0 for sending
- # heartbeat signal. Usually this is the
- # same as wd_heartbeat_port.
- # (change requires restart)
+ # Port number of destination 0 for sending
+ # heartbeat signal. Usually this is the
+ # same as wd_heartbeat_port.
+ # (change requires restart)
heartbeat_device0 = ''
- # Name of NIC device (such like 'eth0')
- # used for sending/receiving heartbeat
- # signal to/from destination 0.
- # This works only when this is not empty
- # and pgpool has root privilege.
- # (change requires restart)
+ # Name of NIC device (such like 'eth0')
+ # used for sending/receiving heartbeat
+ # signal to/from destination 0.
+ # This works only when this is not empty
+ # and pgpool has root privilege.
+ # (change requires restart)
heartbeat_destination1 = 'server3'
heartbeat_destination_port1 = 9694
</para>
<programlisting>
heartbeat_destination0 = 'server1'
- # Host name or IP address of destination 0
- # for sending heartbeat signal.
- # (change requires restart)
+ # Host name or IP address of destination 0
+ # for sending heartbeat signal.
+ # (change requires restart)
heartbeat_destination_port0 = 9694
- # Port number of destination 0 for sending
- # heartbeat signal. Usually this is the
- # same as wd_heartbeat_port.
- # (change requires restart)
+ # Port number of destination 0 for sending
+ # heartbeat signal. Usually this is the
+ # same as wd_heartbeat_port.
+ # (change requires restart)
heartbeat_device0 = ''
- # Name of NIC device (such like 'eth0')
- # used for sending/receiving heartbeat
- # signal to/from destination 0.
- # This works only when this is not empty
- # and pgpool has root privilege.
- # (change requires restart)
+ # Name of NIC device (such like 'eth0')
+ # used for sending/receiving heartbeat
+ # signal to/from destination 0.
+ # This works only when this is not empty
+ # and pgpool has root privilege.
+ # (change requires restart)
heartbeat_destination1 = 'server3'
heartbeat_destination_port1 = 9694
</para>
<programlisting>
heartbeat_destination0 = 'server1'
- # Host name or IP address of destination 0
- # for sending heartbeat signal.
- # (change requires restart)
+ # Host name or IP address of destination 0
+ # for sending heartbeat signal.
+ # (change requires restart)
heartbeat_destination_port0 = 9694
- # Port number of destination 0 for sending
- # heartbeat signal. Usually this is the
- # same as wd_heartbeat_port.
- # (change requires restart)
+ # Port number of destination 0 for sending
+ # heartbeat signal. Usually this is the
+ # same as wd_heartbeat_port.
+ # (change requires restart)
heartbeat_device0 = ''
- # Name of NIC device (such like 'eth0')
- # used for sending/receiving heartbeat
- # signal to/from destination 0.
- # This works only when this is not empty
- # and pgpool has root privilege.
- # (change requires restart)
+ # Name of NIC device (such like 'eth0')
+ # used for sending/receiving heartbeat
+ # signal to/from destination 0.
+ # This works only when this is not empty
+ # and pgpool has root privilege.
+ # (change requires restart)
heartbeat_destination1 = 'server2'
heartbeat_destination_port1 = 9694
projects / pgpool2.git / commitdiff