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Manager自动完成了切换操作。
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8.5 master手动切换
先停止manager：masterha_stop --conf=/etc/masterha/app1.cnf
在备选slave和master上添加crontab –e任务，
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手动切换master，命令如下
masterha_master_switch--conf=/etc/masterha/app1.cnf --master_state=dead--dead_master_host=192.168.52.129
masterha_master_switch--conf=/etc/masterha/app1.cnf --master_state=alive--new_master_host=192.168.52.130
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先设置原来的master为dead，如下所示：
[root@oraclem1 ~]# masterha_master_switch --conf=/etc/masterha/app1.cnf --master_state=dead --dead_master_host=192.168.52.129
--dead_master_ip=is not set. Using 192.168.52.129.
--dead_master_port=is not set. Using 3306.
Fri Apr 10 04:19:36 2015 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping.
Fri Apr 10 04:19:36 2015 - [info] Reading application default configuration from /etc/masterha/app1.cnf..
Fri Apr 10 04:19:36 2015 - [info] Reading server configuration from /etc/masterha/app1.cnf..
Fri Apr 10 04:19:36 2015 - [info] MHA::MasterFailover version 0.56.
Fri Apr 10 04:19:36 2015 - [info] Starting master failover.
Fri Apr 10 04:19:36 2015 - [info]
Fri Apr 10 04:19:36 2015 - [info] * Phase 1: Configuration Check Phase..
Fri Apr 10 04:19:36 2015 - [info]
Fri Apr 10 04:19:36 2015 - [info] Multi-master configuration is detected. Current primary(writable) master is 192.168.52.129(192.168.52.129:3306)
Fri Apr 10 04:19:36 2015 - [info] Master configurations are as below:
Master 192.168.52.130(192.168.52.130:3306), replicating from 192.168.52.129(192.168.52.129:3306), read-only
Master 192.168.52.129(192.168.52.129:3306), replicating from 192.168.52.130(192.168.52.130:3306)
Fri Apr 10 04:19:36 2015 - [info] GTID failover mode = 0
Fri Apr 10 04:19:36 2015 - [info] Dead Servers:
Fri Apr 10 04:19:36 2015 - [error][/usr/local/share/perl5/MHA/MasterFailover.pm, ln187] None of server is dead. Stop failover.
Fri Apr 10 04:19:36 2015 - [error][/usr/local/share/perl5/MHA/ManagerUtil.pm, ln177] Got ERROR: at /usr/local/bin/masterha_master_switch line 53
[root@oraclem1 ~]#
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然后设置新的master为alive，在切换过程中，界面几次自动输入YES，最后会有Switchingmaster to 192.168.52.130(192.168.52.130:3306) completed successfully.提示标志着手动切换成功，如下所示：
[root@oraclem1 ~]# masterha_master_switch --conf=/etc/masterha/app1.cnf --master_state=alive --new_master_host=192.168.52.130
Fri Apr 10 04:28:06 2015 - [info] MHA::MasterRotate version 0.56.
Fri Apr 10 04:28:06 2015 - [info] Starting online master switch..
Fri Apr 10 04:28:06 2015 - [info]
Fri Apr 10 04:28:06 2015 - [info] * Phase 1: Configuration Check Phase..
Fri Apr 10 04:28:06 2015 - [info]
Fri Apr 10 04:28:06 2015 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping.
Fri Apr 10 04:28:06 2015 - [info] Reading application default configuration from /etc/masterha/app1.cnf..
Fri Apr 10 04:28:06 2015 - [info] Reading server configuration from /etc/masterha/app1.cnf..
Fri Apr 10 04:28:06 2015 - [info] Multi-master configuration is detected. Current primary(writable) master is 192.168.52.129(192.168.52.129:3306)
Fri Apr 10 04:28:06 2015 - [info] Master configurations are as below:
Master 192.168.52.130(192.168.52.130:3306), replicating from 192.168.52.129(192.168.52.129:3306), read-only
Master 192.168.52.129(192.168.52.129:3306), repli