[root@rd-mysql-test4 scripts]# vim /etc/mha/app1.cnf 
[root@rd-mysql-test4 scripts]# masterha_check_repl --conf=/etc/mha/app1.cnf 
Fri Aug  7 15:24:54 2015 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping.
Fri Aug  7 15:24:54 2015 - [info] Reading application default configurations from /etc/mha/app1.cnf..
Fri Aug  7 15:24:54 2015 - [info] Reading server configurations from /etc/mha/app1.cnf..
Fri Aug  7 15:24:54 2015 - [info] MHA::MasterMonitor version 0.53.
Fri Aug  7 15:24:54 2015 - [info] Dead Servers:
Fri Aug  7 15:24:54 2015 - [info] Alive Servers:
Fri Aug  7 15:24:54 2015 - [info]   10.10.10.56(10.10.10.56:3306)
Fri Aug  7 15:24:54 2015 - [info]   10.10.10.57(10.10.10.57:3306)
Fri Aug  7 15:24:54 2015 - [info]   10.10.10.58(10.10.10.58:3306)
Fri Aug  7 15:24:54 2015 - [info] Alive Slaves:
Fri Aug  7 15:24:54 2015 - [info]   10.10.10.57(10.10.10.57:3306)  Version=5.6.25-log (oldest major version between slaves) log-bin:enabled
Fri Aug  7 15:24:54 2015 - [info]     Replicating from 10.10.10.56(10.10.10.56:3306)
Fri Aug  7 15:24:54 2015 - [info]     Primary candidate for the new Master (candidate_master is set)
Fri Aug  7 15:24:54 2015 - [info]   10.10.10.58(10.10.10.58:3306)  Version=5.6.25-log (oldest major version between slaves) log-bin:enabled
Fri Aug  7 15:24:54 2015 - [info]     Replicating from 10.10.10.56(10.10.10.56:3306)
Fri Aug  7 15:24:54 2015 - [info] Current Alive Master: 10.10.10.56(10.10.10.56:3306)
Fri Aug  7 15:24:54 2015 - [info] Checking slave configurations..
Fri Aug  7 15:24:54 2015 - [info] Checking replication filtering settings..
Fri Aug  7 15:24:54 2015 - [info]  binlog_do_db= city, binlog_ignore_db= mysql
Fri Aug  7 15:24:54 2015 - [info]  Replication filtering check ok.
Fri Aug  7 15:24:54 2015 - [info] Starting SSH connection tests..
Fri Aug  7 15:24:56 2015 - [info] All SSH connection tests passed successfully.
Fri Aug  7 15:24:56 2015 - [info] Checking MHA Node version..
Fri Aug  7 15:24:56 2015 - [info]  Version check ok.
Fri Aug  7 15:24:56 2015 - [info] Checking SSH publickey authentication settings on the current master..
Fri Aug  7 15:24:56 2015 - [info] HealthCheck: SSH to 10.10.10.56 is reachable.
Fri Aug  7 15:24:57 2015 - [info] Master MHA Node version is 0.53.
Fri Aug  7 15:24:57 2015 - [info] Checking recovery script configurations on the current master..
Fri Aug  7 15:24:57 2015 - [info]   Executing command: save_binary_logs --command=test --start_pos=4 --binlog_dir=/data/mysql --output_file=/tmp/save_binary_logs_test --manager_version=0.53 --start_file=mysql-bin.000006 
Fri Aug  7 15:24:57 2015 - [info]   Connecting to root@10.10.10.56(10.10.10.56).. 
  Creating /tmp if not exists..    ok.
  Checking output directory is accessible or not..
   ok.
  Binlog found at /data/mysql, up to mysql-bin.000006
Fri Aug  7 15:24:57 2015 - [info] Master setting check done.
Fri Aug  7 15:24:57 2015 - [info] Checking SSH publickey authentication and checking recovery script configurations on all alive slave servers..
Fri Aug  7 15:24:57 2015 - [info]   Executing command : apply_diff_relay_logs --command=test --slave_user=mha --slave_host=10.10.10.57 --slave_ip=10.10.10.57 --slave_port=330