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FrontPage › StreamingReplication
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[edit]
2 postgresql9.4 install #192.168.56.101, 192.168.56.102 覯 install
谿瑚: http://www.unixmen.com/postgresql-9-4-released-install-centos-7/ rpm -Uvh http://yum.postgresql.org/9.4/redhat/rhel-7-x86_64/pgdg-centos94-9.4-1.noarch.rpm yum update yum install postgresql94-server postgresql94-contrib /usr/pgsql-9.4/bin/postgresql94-setup initdb systemctl enable postgresql-9.4 systemctl start postgresql-9.4 firewall-cmd --permanent --add-port=5432/tcp firewall-cmd --permanent --add-port=80/tcp firewall-cmd --reload setsebool -P httpd_can_network_connect_db 1 su - postgres psql \password postgres [edit]
3 master れ #.conf 殊 襴襦 企
#locate pg_hba.conf #/var/lib/pgsql/9.4/data/pg_hba.conf cd /var/lib/pgsql/9.4/data/ pg_hba.conf殊 replication 覯ip 焔
vi pg_hba.conf host replication postgres 192.168.56.101/32 trust host replication postgres 192.168.56.102/32 trust host all all 192.168.56.1/32 trust谿瑚:
vi postgresql.conf listen_addresses = '*' ssl = false wal_level = hot_standby max_wal_senders = 5 wal_keep_segement = 64 max_replication_slot = 1 襦
su - postgres
psql -c "select * from pg_create_physical_replication_slot('my_rep_slot');"
exit
蟠 覲蟆
chown -R postgres.postgres /var/lib/pgsql postgresql restart
su - postgres cd /usr/pgsql-9.4/bin ./pg_ctl -D /var/lib/pgsql/9.4/data stop -m fast ./pg_ctl start -l /var/lib/pgsql/9.4/data/pg_log/postgres.log -D /var/lib/pgsql/9.4/data or
systemctl restart postgresql-9.4 systemctl stop postgresql-9.4 [edit]
4 slave れ #.conf 殊 襴襦 企
#locate pg_hba.conf #/var/lib/pgsql/9.4/data/pg_hba.conf cd /var/lib/pgsql/9.4/data/ pg_hba.conf殊 replication 覯ip 焔
vi pg_hba.conf host replication postgres 192.168.56.101/32 trust host replication postgres 192.168.56.102/32 trust host all all 192.168.56.1/32 trust谿瑚:
cd / systemctl stop postgresql-9.4 mv /var/lib/pgsql/9.4/data /var/lib/pgsql/9.4/data_old su - postgres pg_basebackup -h 192.168.56.101 -p 5432 -U postgres -D /var/lib/pgsql/9.4/data --xlog --checkpoint=fast --progress ls /var/lib/pgsql/9.4/data exit postgesql.conf
cd /var/lib/pgsql/9.4/data/ vi postgresql.conf listen_addresses = '*" ssl = false wal_level = hot_standby max_wal_senders = 5 wal_keep_segement = 64 max_replication_slot = 1 hot_standby = on recovery.conf
cd /var/lib/pgsql/9.4/data/ vi recovery.conf primary_slot_name = 'my_rep_slot' recovery_target_timeline = 'latest' primary_conninfo = 'host=192.168.56.101 port=5432 user=postgres password=9999' standby_mode = on 蟠 覲蟆
chown -R postgres.postgres /var/lib/pgsql postgresql restart
su - postgres cd /usr/pgsql-9.4/bin ./pg_ctl -D /var/lib/pgsql/9.4/data stop -m fast ./pg_ctl start -l /var/lib/pgsql/9.4/data/pg_log/postgres.log -D /var/lib/pgsql/9.4/data or
systemctl restart postgresql-9.4 systemctl stop postgresql-9.4 [edit]
5 replication test #master 覯..
su - postgres psql -x -c "create table replication_test(id int)" psql -x -c "insert into replication_test(id) values(1)" psql -x -c "select * from replication_test" slave 覯..
su - postgres psql -x -c "select * from replication_test"蟇一 れ螳朱 覦 蟆 螳. master 覯..
su - postgres psql -x -c "Select * From pg_stat_replication" [edit]
6 fail over #襴る れ螻 螳.
[edit]
6.1 192.168.56.102 覯 誤 #slave 郁鍵 螳ロ襦 promote . 伎 蠍一ヾ slave 覯 master螳 .
cd /usr/pgsql-9.4/bin ./pg_ctl promote 襦
su - postgres
psql -c "select * from pg_create_physical_replication_slot('my_rep_slot');"
exit
192.168.56.103 覯襯 pg_hba.conf 豢螳.
cd /var/lib/pgsql/9.4/data/ vi pg_hba.conf host replication postgres 192.168.56.101/32 trust host replication postgres 192.168.56.102/32 trust host replication postgres 192.168.56.103/32 trust host all all 192.168.56.1/32 trust postgresql.conf hot_standby = on 譯殊豌襴
cd /var/lib/pgsql/9.4/data/ vi postgresql.conf #hot_standby = on restart
systemctl restart postgresql-9.4 [edit]
6.2 192.168.56.103 覯 誤 # slave れ 蟆 豌 れ. , IP 蠍一ヾ slave覯(192.168.56.102)襯 覦朱慨蟆 .
cd /var/lib/pgsql/9.4/data/ vi pg_hba.conf host replication postgres 192.168.56.101/32 trust host replication postgres 192.168.56.102/32 trust host replication postgres 192.168.56.103/32 trust host all all 192.168.56.1/32 trust master 覲旧(蠍一ヾ master 覯 192.168.56.101 譯曙 願, 192.168.56.102襦 promote 企襦 192.168.56.102襯 覲旧)
cd / systemctl stop postgresql-9.4 mv /var/lib/pgsql/9.4/data /var/lib/pgsql/9.4/data_old su - postgres pg_basebackup -h 192.168.56.102 -p 5432 -U postgres -D /var/lib/pgsql/9.4/data --xlog --checkpoint=fast --progress ls /var/lib/pgsql/9.4/data exit postgesql.conf
cd /var/lib/pgsql/9.4/data/ vi postgresql.conf listen_addresses = '*" ssl = false wal_level = hot_standby max_wal_senders = 5 wal_keep_segement = 64 max_replication_slot = 1 hot_standby = on recovery.conf
cd /var/lib/pgsql/9.4/data/ vi recovery.conf primary_slot_name = 'my_rep_slot' recovery_target_timeline = 'latest' primary_conninfo = 'host=192.168.56.102 port=5432 user=postgres password=9999' standby_mode = on 蟠 覲蟆
chown -R postgres.postgres /var/lib/pgsql systemctl restart postgresql-9.4 [edit]
6.3 replication test #192.168.56.102 ..
su - postgres psql -x -c "insert into replication_test(id) values(100)" psql -x -c "select * from replication_test" psql -x -c "create table replication_test2(id int)" psql -x -c "insert into replication_test2(id) values(1)" psql -x -c "select * from replication_test2" 192.168.56.103 ..
su - postgres psql -x -c "select * from replication_test" psql -x -c "select * from replication_test2"
鏤
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