【PostgreSQL】数据库复制

Love The Way You Lie 2022-01-17 11:41 325阅读 0赞

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

转载于:https://blog.51cto.com/13598811/2378520