【PostgreSQL】数据库复制

异步流复制 [root@wallet01 ~]# su - postgres [postgres@wallet01 ~]$ vi /var/lib/pgsql/9.6/data/pg_hba.conf host    replication     postgres        192.168.1.0/24          md5 [postgres@wallet01 ~]$ vi /var/lib/pgsql/9.6/data/postgresql.conf listen_addresses = '0.0.0.0' max_wal_senders = 5 wal_level = hot_standby  [postgres@wallet01 ~]$ pg_ctl restart waiting for server to shut down.... done server stopped server starting [root@wallet02 ~]# su - postgres [postgres@wallet02 ~]$ pg_basebackup -h 192.168.1.201 -U postgres -F p -P -x -R -D /var/lib/pgsql/9.6/data  Password:  2161085/2161085 kB (100%), 1/1 tablespace [postgres@wallet02 ~]$ vi /var/lib/pgsql/9.6/data/postgresql.conf hot_standby = on [postgres@wallet02 ~]$ vi /var/lib/pgsql/9.6/data/recovery.conf standby_mode = 'on' primary_conninfo = 'user=postgres password=postgres host=192.168.1.201 port=5432 sslmode=disable  sslcompression=1 krbsrvname=postgres' [postgres@wallet02 ~]$ pg_ctl start server starting [postgres@wallet01 ~]$ psql psql (9.6.12) Type "help" for help. postgres=# select pid,state,client_addr,sync_priority,sync_state from pg_stat_replication;  pid  |   state   |  client_addr  | sync_priority | sync_state  ------+-----------+---------------+---------------+------------  2055 | streaming | 192.168.1.202 |             0 | async (1 row)

同步流复制 [root@wallet01 ~]# su - postgres [postgres@wallet01 ~]$ vi /var/lib/pgsql/9.6/data/pg_hba.conf host    replication     postgres        192.168.1.0/24          md5 [postgres@wallet01 ~]$ vi /var/lib/pgsql/9.6/data/postgresql.conf max_wal_senders = 5  wal_level = hot_standby synchronous_standby_names = 'wallet02,wallet03' [root@wallet01 ~]# su - postgres [postgres@wallet01 ~]$ pg_ctl reload server signaled [root@wallet02 ~]# su - postgres [postgres@wallet02 ~]$ pg_basebackup -h 192.168.1.201 -U postgres -F p -P -x -R -D /var/lib/pgsql/9.6/data  Password:  2161085/2161085 kB (100%), 1/1 tablespace [postgres@wallet02 ~]$ vi /var/lib/pgsql/9.6/data/postgresql.conf hot_standby = on [postgres@wallet02 ~]$ vi /var/lib/pgsql/9.6/data/recovery.conf standby_mode = 'on' primary_conninfo = 'application_name=wallet02 user=postgres password=postgres host=192.168.1.201 port=5432 sslmode=disable sslcompression=1' [postgres@wallet02 ~]$  pg_ctl start server starting [root@wallet03 ~]# su - postgres [postgres@wallet03 ~]$ pg_basebackup -h 192.168.1.201 -U postgres -F p -P -x -R -D /var/lib/pgsql/9.6/data  Password:  2161215/2161215 kB (100%), 1/1 tablespace [postgres@wallet03 ~]$ vi /var/lib/pgsql/9.6/data/postgresql.conf hot_standby = on [postgres@wallet03 ~]$ vi /var/lib/pgsql/9.6/data/recovery.conf standby_mode = 'on' primary_conninfo = 'application_name=wallet03 user=postgres password=postgres host=192.168.1.201 port=5432 sslmode=disable sslcompression=1' [postgres@wallet03 ~]$  pg_ctl start server starting [postgres@wallet01 ~]$ psql psql (9.6.12) Type "help" for help. postgres=# select pid,state,client_addr,sync_priority,sync_state from pg_stat_replication;  pid  |   state   |  client_addr  | sync_priority | sync_state  ------+-----------+---------------+---------------+------------  1968 | streaming | 192.168.1.202 |             1 | sync  2018 | streaming | 192.168.1.203 |             2 | potential