报错原因

在master_ip_failover脚本文件中有一些内容是我们不需要的，因此需要注释掉

[root@localhost ~]#  masterha_check_repl -conf=/etc/masterha/app1.cnf  //检查MHA状况
……
Sun Sep 20 01:05:06 2020 - [error][/usr/local/share/perl5/MHA/MasterMonitor.pm, ln229]  Failed to get master_ip_failover_script status with return code 255:0.
Sun Sep 20 01:05:06 2020 - [error][/usr/local/share/perl5/MHA/MasterMonitor.pm, ln427] Error happened on checking configurations.  at /usr/local/bin/masterha_check_repl line 48.
Sun Sep 20 01:05:06 2020 - [error][/usr/local/share/perl5/MHA/MasterMonitor.pm, ln525] Error happened on monitoring servers.
……

解决办法

# FIXME_xxx; //将这条注释掉就正常了

[root@localhost ~]# vi /usr/local/bin/master_ip_failover 
……
      ## Update master ip on the catalog database, etc
#      FIXME_xxx;    //将这条注释掉就正常了

再次检查，问题已经解决了

[root@localhost ~]#  masterha_check_repl -conf=/etc/masterha/app1.cnf
……
Sun Sep 20 01:14:06 2020 - [info]   /usr/local/bin/master_ip_failover --command=status --ssh_user=root --orig_master_host=20.0.0.12 --orig_master_ip=20.0.0.12 --orig_master_port=3306 
Sun Sep 20 01:14:06 2020 - [info]  OK.
Sun Sep 20 01:14:06 2020 - [warning] shutdown_script is not defined.
Sun Sep 20 01:14:06 2020 - [info] Got exit code 0 (Not master dead).

MySQL Replication Health is OK.