ProxySQL主要是通过mysql_servers来配置MySQL servers,有时候可能会用到mysql_replication_hostgroups

备注:在读下面内容之前,确保理解multi-layer configuration system,或者看我前面的文章

注意:

  • 更新mysql_servers 和mysql_replication_hostgroups表后,如果不执行LOAD MYSQL SERVERS TO RUNTIME,当前配置并不会生效
  • 如果不执行SAVE MYSQL SERVERS TO DISK,当前配置并不会被持久化,服务重启后数据将丢失

多层配置系统略过,详细内容参考multi-layer configuration system

Adding a new server

要添加一个后台MySQL server,insert一条新纪录到mysql_servers表即可,这张表部分列都带有默认值

下面的操作是新增一个MySQL server,除hostname外其他都采用默认值

 1 Admin> SELECT * FROM mysql_servers;
 2 Empty set (0.00 sec)
 3 
 4 Admin> INSERT INTO mysql_servers (hostname) VALUES ('172.16.0.1');
 5 Query OK, 1 row affected (0.00 sec)
 6 
 7 Admin> SELECT * FROM mysql_servers\G
 8 *************************** 1. row ***************************
 9        hostgroup_id: 0
10            hostname: 172.16.0.1
11                port: 3306
12              status: ONLINE
13              weight: 1
14         compression: 0
15     max_connections: 1000
16 max_replication_lag: 0
17             use_ssl: 0
18      max_latency_ms: 0
19             comment:
20 1 row in set (0.00 sec)

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