MySQL 数据库学习之MHA手动切换

手动failover，这种场景意味着在业务上没有启用MHA自动切换功能，当主服务器故障时，人工手动调用MHA来进行故障切换操作，具体命令如下： • 先关闭mha进程，确保不会自动执行切换 [root@mycat ~]# masterha_stop --conf=/etc/app1.cnf • 再关闭maser主库 [root@master ~]# /etc/init.d/mysql.server stop Shutting down MySQL............ SUCCESS! • 执行手动切换 [root@mycat ~]# masterha_master_switch --master_state=dead --conf=/etc/app1.cnf -- dead_master_host=master --dead_master_port=3308 --new_master_ip=192.168.237.131 -- new_master_port=3308 …… ----- Failover Report ----- app1: MySQL Master failover master to slave1 succeeded Master master is down! Check MHA Manager logs at mycat for details. Started manual(interactive) failover. The latest slave slave1(192.168.237.130:3308) has all relay logs for recovery. Selected slave1 as a new master. slave1: OK: Applying all logs succeeded. slave2: This host has the latest relay log events. Generating relay diff files from the latest slave succeeded. slave2: OK: Applying all logs succeeded. Slave started, replicating from slave1. slave1: Resetting slave info succeeded. Master failover to slave1(192.168.237.130:3308) completed successfully.