搭建完mha后，检查复制状态报错：
root@manager[/root]#/usr/local/bin/masterha_check_repl --conf=/u01/mha/etc/app.cnf
Sat Oct 6 22:30:36 2018 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping.
Sat Oct 6 22:30:36 2018 - [info] Reading application default configuration from /u01/mha/etc/app.cnf..
Sat Oct 6 22:30:36 2018 - [info] Reading server configuration from /u01/mha/etc/app.cnf..
Sat Oct 6 22:30:36 2018 - [info] MHA::MasterMonitor version 0.58.
Sat Oct 6 22:30:38 2018 - [info] GTID failover mode = 0
Sat Oct 6 22:30:38 2018 - [info] Dead Servers:
Sat Oct 6 22:30:38 2018 - [info] Alive Servers:
Sat Oct 6 22:30:38 2018 - [info] master(192.168.2.118:3306)
Sat Oct 6 22:30:38 2018 - [info] slave(192.168.2.119:3306)
Sat Oct 6 22:30:38 2018 - [info] manager(192.168.2.120:3306)
Sat Oct 6 22:30:38 2018 - [info] Alive Slaves:
Sat Oct 6 22:30:38 2018 - [info] slave(192.168.2.119:3306) Version=5.6.39-log (oldest major version between slaves) log-bin:enabled
Sat Oct 6 22:30:38 2018 - [info] Replicating from 192.168.2.118(192.168.2.118:3306)
Sat Oct 6 22:30:38 2018 - [info] Primary candidate for the new Master (candidate_master is set)
Sat Oct 6 22:30:38 2018 - [info] manager(192.168.2.120:3306) Version=5.6.39-log (oldest major version between slaves) log-bin:enabled
Sat Oct 6 22:30:38 2018 - [info] Replicating from 192.168.2.118(192.168.2.118:3306)
Sat Oct 6 22:30:38 2018 - [info] Not candidate for the new Master (no_master is set)
Sat Oct 6 22:30:38 2018 - [info] Current Alive Master: master(192.168.2.118:3306)
Sat Oct 6 22:30:38 2018 - [info] Checking slave configurations..
Sat Oct 6 22:30:38 2018 - [info] read_only=1 is not set on slave slave(192.168.2.119:3306).
Sat Oct 6 22:30:38 2018 - [warning] relay_log_purge=0 is not set on slave slave(192.168.2.119:3306).
Sat Oct 6 22:30:38 2018 - [info] read_only=1 is not set on slave manager(192.168.2.120:3306).
Sat Oct 6 22:30:38 2018 - [warning] relay_log_purge=0 is not set on slave manager(192.168.2.120:3306).
Sat Oct 6 22:30:38 2018 - [info] Checking replication filtering settings..
Sat Oct 6 22:30:38 2018 - [info] binlog_do_db= , binlog_ignore_db=
Sat Oct 6 22:30:38 2018 - [info] Replication filtering check ok.
Sat Oct 6 22:30:38 2018 - [info] GTID (with auto-pos) is not supported
Sat Oct 6 22:30:38 2018 - [info] Starting SSH connection tests..
Sat Oct 6 22:30:40 2018 - [info] All SSH connection tests passed successfully.
Sat Oct 6 22:30:40 2018 - [info] Checking MHA Node version..
Sat Oct 6 22:30:40 2018 - [info] Version check ok.
Sat Oct 6 22:30:40 2018 - [info] Checking SSH publickey authentication settings on the current master..
Sat Oct 6 22:30:41 2018 - [info] HealthCheck: SSH to master is reachable.
Sat Oct 6 22:30:41 2018 - [info] Master MHA Node version is 0.58.
Sat Oct 6 22:30:41 2018 - [info] Checking recovery script configurations on master(192.168.2.118:3306)..
Sat Oct 6 22:30:41 2018 - [info] Executing command: save_binary_logs --command=test --start_pos=4 --binlog_dir=/u01/my3306/log/binlog --output_file=/u01/mha/etc/app/save_binary_logs_test --manager_version=0.58 --start_file=binlog.000010
Sat Oct 6 22:30:41 2018 - [info] Connecting to [email protected](master:22)..
Creating /u01/mha/etc/app if not exists.. ok.
Checking output directory is accessible or not..
ok.
Binlog found at /u01/my3306/log/binlog, up to binlog.000010
Sat Oct 6 22:30:41 2018 - [info] Binlog setting check done.
Sat Oct 6 22:30:41 2018 - [info] Checking SSH publickey authentication and checking recovery script configurations on all alive slave servers..
Sat Oct 6 22:30:41 2018 - [info] Executing command : apply_diff_relay_logs --command=test --slave_user='root' --slave_host=slave --slave_ip=192.168.2.119 --slave_port=3306 --workdir=/u01/mha/etc/app --target_version=5.6.39-log --manager_version=0.58 --relay_log_info=/u01/my3306/log/relay-log.info --relay_dir=/u01/my3306/data/ --slave_pass=xxx
Sat Oct 6 22:30:41 2018 - [info] Connecting to [email protected](slave:22)..
Checking slave recovery environment settings..
Opening /u01/my3306/log/relay-log.info ... ok.
Relay log found at /u01/my3306/log, up to relaylog.000005
Temporary relay log file is /u01/my3306/log/relaylog.000005
Checking if super_read_only is defined and turned on..DBD::mysql::st execute failed: Unknown system variable 'super_read_only' at /usr/local/share/perl5/MHA/SlaveUtil.pm line 245.
Sat Oct 6 22:30:41 2018 - [error][/usr/local/share/perl5/MHA/MasterMonitor.pm, ln208] Slaves settings check failed!
Sat Oct 6 22:30:41 2018 - [error][/usr/local/share/perl5/MHA/MasterMonitor.pm, ln416] Slave configuration failed.
Sat Oct 6 22:30:41 2018 - [error][/usr/local/share/perl5/MHA/MasterMonitor.pm, ln427] Error happened on checking configurations. at /usr/local/bin/masterha_check_repl line 48.
Sat Oct 6 22:30:41 2018 - [error][/usr/local/share/perl5/MHA/MasterMonitor.pm, ln525] Error happened on monitoring servers.
Sat Oct 6 22:30:41 2018 - [info] Got exit code 1 (Not master dead).
MySQL Replication Health is NOT OK!
root@manager[/root]#/usr/local/bin/masterha_check_repl --conf=/u01/mha/etc/app.cnf
Sat Oct 6 23:10:15 2018 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping.
Sat Oct 6 23:10:15 2018 - [info] Reading application default configuration from /u01/mha/etc/app.cnf..
Sat Oct 6 23:10:15 2018 - [info] Reading server configuration from /u01/mha/etc/app.cnf..
Sat Oct 6 23:10:15 2018 - [info] MHA::MasterMonitor version 0.58.
Sat Oct 6 23:10:16 2018 - [info] GTID failover mode = 0
Sat Oct 6 23:10:16 2018 - [info] Dead Servers:
Sat Oct 6 23:10:16 2018 - [info] Alive Servers:
Sat Oct 6 23:10:16 2018 - [info] master(192.168.2.118:3306)
Sat Oct 6 23:10:16 2018 - [info] slave(192.168.2.119:3306)
Sat Oct 6 23:10:16 2018 - [info] manager(192.168.2.120:3306)
Sat Oct 6 23:10:16 2018 - [info] Alive Slaves:
Sat Oct 6 23:10:16 2018 - [info] slave(192.168.2.119:3306) Version=5.6.39-log (oldest major version between slaves) log-bin:enabled
Sat Oct 6 23:10:16 2018 - [info] Replicating from 192.168.2.118(192.168.2.118:3306)
Sat Oct 6 23:10:16 2018 - [info] Primary candidate for the new Master (candidate_master is set)
Sat Oct 6 23:10:16 2018 - [info] manager(192.168.2.120:3306) Version=5.6.39-log (oldest major version between slaves) log-bin:enabled
Sat Oct 6 23:10:16 2018 - [info] Replicating from 192.168.2.118(192.168.2.118:3306)
Sat Oct 6 23:10:16 2018 - [info] Not candidate for the new Master (no_master is set)
Sat Oct 6 23:10:16 2018 - [info] Current Alive Master: master(192.168.2.118:3306)
Sat Oct 6 23:10:16 2018 - [info] Checking slave configurations..
Sat Oct 6 23:10:16 2018 - [warning] relay_log_purge=0 is not set on slave slave(192.168.2.119:3306).
Sat Oct 6 23:10:16 2018 - [warning] relay_log_purge=0 is not set on slave manager(192.168.2.120:3306).
Sat Oct 6 23:10:16 2018 - [info] Checking replication filtering settings..
Sat Oct 6 23:10:16 2018 - [info] binlog_do_db= , binlog_ignore_db=
Sat Oct 6 23:10:16 2018 - [info] Replication filtering check ok.
Sat Oct 6 23:10:16 2018 - [info] GTID (with auto-pos) is not supported
Sat Oct 6 23:10:16 2018 - [info] Starting SSH connection tests..
Sat Oct 6 23:10:18 2018 - [info] All SSH connection tests passed successfully.
Sat Oct 6 23:10:18 2018 - [info] Checking MHA Node version..
Sat Oct 6 23:10:18 2018 - [info] Version check ok.
Sat Oct 6 23:10:18 2018 - [info] Checking SSH publickey authentication settings on the current master..
Sat Oct 6 23:10:18 2018 - [info] HealthCheck: SSH to master is reachable.
Sat Oct 6 23:10:18 2018 - [info] Master MHA Node version is 0.58.
Sat Oct 6 23:10:18 2018 - [info] Checking recovery script configurations on master(192.168.2.118:3306)..
Sat Oct 6 23:10:18 2018 - [info] Executing command: save_binary_logs --command=test --start_pos=4 --binlog_dir=/u01/my3306/log/binlog --output_file=/u01/mha/etc/app/save_binary_logs_test --manager_version=0.58 --start_file=binlog.000010
Sat Oct 6 23:10:18 2018 - [info] Connecting to [email protected](master:22)..
Creating /u01/mha/etc/app if not exists.. ok.
Checking output directory is accessible or not..
ok.
Binlog found at /u01/my3306/log/binlog, up to binlog.000010
Sat Oct 6 23:10:18 2018 - [info] Binlog setting check done.
Sat Oct 6 23:10:18 2018 - [info] Checking SSH publickey authentication and checking recovery script configurations on all alive slave servers..
Sat Oct 6 23:10:18 2018 - [info] Executing command : apply_diff_relay_logs --command=test --slave_user='root' --slave_host=slave --slave_ip=192.168.2.119 --slave_port=3306 --workdir=/u01/mha/etc/app --target_version=5.6.39-log --manager_version=0.58 --relay_log_info=/u01/my3306/log/relay-log.info --relay_dir=/u01/my3306/data/ --slave_pass=xxx
Sat Oct 6 23:10:18 2018 - [info] Connecting to [email protected](slave:22)..
Checking slave recovery environment settings..
Opening /u01/my3306/log/relay-log.info ... ok.
Relay log found at /u01/my3306/log, up to relaylog.000005
Temporary relay log file is /u01/my3306/log/relaylog.000005
Checking if super_read_only is defined and turned on..DBD::mysql::st execute failed: Unknown system variable 'super_read_only' at /usr/local/share/perl5/MHA/SlaveUtil.pm line 245.
Sat Oct 6 23:10:19 2018 - [error][/usr/local/share/perl5/MHA/MasterMonitor.pm, ln208] Slaves settings check failed!
Sat Oct 6 23:10:19 2018 - [error][/usr/local/share/perl5/MHA/MasterMonitor.pm, ln416] Slave configuration failed.
Sat Oct 6 23:10:19 2018 - [error][/usr/local/share/perl5/MHA/MasterMonitor.pm, ln427] Error happened on checking configurations. at /usr/local/bin/masterha_check_repl line 48.
Sat Oct 6 23:10:19 2018 - [error][/usr/local/share/perl5/MHA/MasterMonitor.pm, ln525] Error happened on monitoring servers.
Sat Oct 6 23:10:19 2018 - [info] Got exit code 1 (Not master dead).
MySQL Replication Health is NOT OK!错误显示：
Checking if super_read_only is defined and turned on
检查从库的super_read_only参数定义，并且是否是启用状态，发现该参数并不存在，所以报错。
查看mysql版本：
发现是5.6的，所以在5.6之前，这个参数是不存在的，从5.7引入这个参数。
解决办法是把mha manager改成0.56版本，此处我用的是0.58版本。