报错：
[root@localhost108 bin]# masterha_check_repl --conf=/etc/masterha_default.cnf
Wed Aug 30 05:04:48 2017 - [error][/usr/local/share/perl5/MHA/ServerManager.pm, ln492] Server 192.168.0.107(192.168.0.107:3306) is dead, but must be alive! Check server settings. Wed Aug 30 05:04:48 2017 - [error][/usr/local/share/perl5/MHA/MasterMonitor.pm, ln424] Error happened on checking configurations. at /usr/local/share/perl5/MHA/MasterMonitor.pm line 399 Wed Aug 30 05:04:48 2017 - [error][/usr/local/share/perl5/MHA/MasterMonitor.pm, ln523] Error happened on monitoring servers.
解决方法：
登录 192.168.0.107的MySQL。发现MySQL服务是正常，可是为什么会说 192.168.0.107：3306 IS DEAD,可能是防火墙等原因。
[root@localhost107 ~]# service iptables stop iptables: Setting chains to policy ACCEPT: filter [ OK ] iptables: Flushing firewall rules: [ OK ] iptables: Unloading modules: [ OK ]
关闭防火墙之后，一切正常了。
[root@localhost107 ~]# service iptables stop iptables: Setting chains to policy ACCEPT: filter [ OK ] iptables: Flushing firewall rules: [ OK ] iptables: Unloading modules: [ OK ]
