计划搭建一主一从的pg数据库集群
环境配置
| 主机名 | IP地址 | 角色 | 数据目录 |
|---|---|---|---|
| master | 192.168.56.15 | 主库 | /data |
| master1 | 192.168.56.16 | standby | /data |
主库上的配置
- 配置pg_hba.conf
host replication postgres 192.168.56.0/24 trust
- 修改postgresql.conf
max_wal_senders = 5
wal_level = hot_standby
指定同步复制的standby的名字
synchronous_standby_names = 'standby01
备库上的配置
在/data 数据目录里面创建文件
vi recovery.conf
standby_mode = 'on'
recovery_target_timeline = 'latest'
primary_conninfo = 'application_name=standby01 user=postgres host=192.168.56.15 port=5432 password=postgres sslmode=disable sslcompression=1'
启动数据库及备库
-
将两个主备依次启动
-
从主库上进入数据库中可以查看到数据主备的状态
postgres=# select * from pg_stat_replication;
pid | usesysid | usename | application_name | client_addr | client_hostname | client_port | backend_start | backend_xmin | state |
sent_lsn | write_lsn | flush_lsn | replay_lsn | write_lag | flush_lag | replay_lag | sync_priority | sync_state
------+----------+----------+------------------+---------------+-----------------+-------------+-------------------------------+--------------+-----------+--
----------+------------+------------+------------+-----------+-----------+------------+---------------+------------
1859 | 10 | postgres | standby01 | 192.168.56.16 | | 7998 | 2018-07-04 16:11:33.549227+08 | | streaming | 5
/DBA4F268 | 5/DBA4F268 | 5/DBA4F268 | 5/DBA4F268 | | | | 1 | sync
(1 row)