如果发现如下错误：
Can‘t exec "mysqlbinlog": No such file or directory at /usr/local/share/perl5/MHA/BinlogManager.pm line 99. mysqlbinlog version not found!
Testing mysql connection and privileges..sh: mysql: command not found mysql command failed with rc 127:0!
可以通过以下方法解决（在所有节点上执行）：
192.168.2.128 [root ~]$ ln -s /usr/local/mysql/bin/mysqlbinlog /usr/local/bin/mysqlbinlog 192.168.2.128 [root ~]$ ln -s /usr/local/mysql/bin/mysql /usr/local/bin/mysql 192.168.2.129 [root ~]$ ln -s /usr/local/mysql/bin/mysqlbinlog /usr/local/bin/mysqlbinlog 192.168.2.129 [root ~]$ ln -s /usr/local/mysql/bin/mysql /usr/local/bin/mysql 192.168.2.130 [root ~]$ ln -s /usr/local/mysql/bin/mysqlbinlog /usr/local/bin/mysqlbinlog 192.168.2.130 [root ~]$ ln -s /usr/local/mysql/bin/mysql /usr/local/bin/mysql
再进行检查
192.168.2.131 [root ~]$ masterha_check_repl --conf=/etc/masterha/app1.cnf Sun Jan 18 13:19:41 2015 - [info] Checking replication health on 192.168.2.129.. Sun Jan 18 13:19:41 2015 - [info] ok. Sun Jan 18 13:19:41 2015 - [info] Checking replication health on 192.168.2.130.. Sun Jan 18 13:19:41 2015 - [info] ok. Sun Jan 18 13:19:41 2015 - [info] Checking master_ip_failover_script status: Sun Jan 18 13:19:41 2015 - [info] /usr/local/bin/master_ip_failover --command=status --ssh_user=root --orig_master_host=192.168.2.128 --orig_master_ip=192.168.2.128 --orig_master_port=3306 Bareword "FIXME_xxx" not allowed while "strict subs" in use at /usr/local/bin/master_ip_failover line 88. Execution of /usr/local/bin/master_ip_failover aborted due to compilation errors. Sun Jan 18 13:19:41 2015 - [error][/usr/local/share/perl5/MHA/MasterMonitor.pm, ln214] Failed to get master_ip_failover_script status with return code 255:0. Sun Jan 18 13:19:41 2015 - [error][/usr/local/share/perl5/MHA/MasterMonitor.pm, ln383] Error happend on checking configurations. at /usr/local/bin/masterha_check_repl line 48 Sun Jan 18 13:19:41 2015 - [error][/usr/local/share/perl5/MHA/MasterMonitor.pm, ln478] Error happened on monitoring servers. Sun Jan 18 13:19:41 2015 - [info] Got exit code 1 (Not master dead). MySQL Replication Health is NOT OK! 192.168.2.131 [root ~]$
还是报错，纠结N久，才发现原因是：原来Failover两种方式：一种是虚拟IP地址，一种是全局配置文件。MHA并没有限定使用哪一种方式，而是让用户自己选择，虚拟IP地址的方式会牵扯到其它的软件,比如keepalive软件，而且还要修改脚本master_ip_failover。
所以先暂时注释master_ip_failover_script= /usr/local/bin/master_ip_failover这个选项。后面引入keepalived后和修改该脚本以后再开启该选项
192.168.2.131 [root ~]$ grep master_ip_failover /etc/masterha/app1.cnf #master_ip_failover_script= /usr/local/bin/master_ip_failover
再次进行状态查看：
192.168.2.131 [root ~]$ masterha_check_repl --conf=/etc/masterha/app1.cnf Sun Jan 18 13:23:57 2015 - [info] Slaves settings check done. Sun Jan 18 13:23:57 2015 - [info] 192.168.2.128 (current master) +--192.168.2.129 +--192.168.2.130 Sun Jan 18 13:23:57 2015 - [info] Checking replication health on 192.168.2.129.. Sun Jan 18 13:23:57 2015 - [info] ok. Sun Jan 18 13:23:57 2015 - [info] Checking replication health on 192.168.2.130.. Sun Jan 18 13:23:57 2015 - [info] ok. Sun Jan 18 13:23:57 2015 - [warning] master_ip_failover_script is not defined. Sun Jan 18 13:23:57 2015 - [warning] shutdown_script is not defined. Sun Jan 18 13:23:57 2015 - [info] Got exit code 0 (Not master dead). MySQL Replication Health is OK. 192.168.2.131 [root ~]$
已经没有明显报错，只有两个警告而已，复制也显示正常了,哈哈，没报错了，先乐一会^0^
