心态炸裂，搭建mha时，在测试主从复制时候报错MySQL Replication Health is NOT OK！！！有点慌！慢慢盘吧！

Posted 2021-08-30 龙少。

MHA时测试主从复制报错mysql Replication Health is NOT OK!

具体报错信息

[root@manager bin]# masterha_check_repl -conf=/etc/masterha/app1.cnf
Sat Jul 31 05:23:03 2021 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping.
Sat Jul 31 05:23:03 2021 - [info] Reading application default configuration from /etc/masterha/app1.cnf..
Sat Jul 31 05:23:03 2021 - [info] Reading server configuration from /etc/masterha/app1.cnf..
Sat Jul 31 05:23:03 2021 - [info] MHA::MasterMonitor version 0.57.
Sat Jul 31 05:23:04 2021 - [info] GTID failover mode = 0
Sat Jul 31 05:23:04 2021 - [info] Dead Servers:
Sat Jul 31 05:23:04 2021 - [info]   192.168.206.188(192.168.206.188:3306)
Sat Jul 31 05:23:04 2021 - [info] Alive Servers:
Sat Jul 31 05:23:04 2021 - [info]   192.168.206.88(192.168.206.88:3306)
Sat Jul 31 05:23:04 2021 - [info]   192.168.206.177(192.168.206.177:3306)
Sat Jul 31 05:23:04 2021 - [info] Alive Slaves:
Sat Jul 31 05:23:04 2021 - [info]   192.168.206.177(192.168.206.177:3306)  Version=5.7.20-log (oldest major version between slaves) log-bin:enabled
Sat Jul 31 05:23:04 2021 - [info]     Replicating from 192.168.206.88(192.168.206.88:3306)
Sat Jul 31 05:23:04 2021 - [info] Current Alive Master: 192.168.206.88(192.168.206.88:3306)
Sat Jul 31 05:23:04 2021 - [info] Checking slave configurations..
Sat Jul 31 05:23:04 2021 - [info]  read_only=1 is not set on slave 192.168.206.177(192.168.206.177:3306).
Sat Jul 31 05:23:04 2021 - [warning]  relay_log_purge=0 is not set on slave 192.168.206.177(192.168.206.177:3306).
Sat Jul 31 05:23:04 2021 - [info] Checking replication filtering settings..
Sat Jul 31 05:23:04 2021 - [info]  binlog_do_db= , binlog_ignore_db=
Sat Jul 31 05:23:04 2021 - [info]  Replication filtering check ok.
Sat Jul 31 05:23:04 2021 - [info] GTID (with auto-pos) is not supported
Sat Jul 31 05:23:04 2021 - [info] Starting SSH connection tests..
Sat Jul 31 05:23:15 2021 - [info] All SSH connection tests passed successfully.
Sat Jul 31 05:23:15 2021 - [info] Checking MHA Node version..
Sat Jul 31 05:23:15 2021 - [info]  Version check ok.
Sat Jul 31 05:23:15 2021 - [error][/usr/local/share/perl5/MHA/ServerManager.pm, ln492]  Server 192.168.206.188(192.168.206.188:3306) is dead, but must be alive! Check server settings.
Sat Jul 31 05:23:15 2021 - [error][/usr/local/share/perl5/MHA/MasterMonitor.pm, ln427] Error happened on checking configurations.  at /usr/local/share/perl5/MHA/MasterMonitor.pm line 402.
Sat Jul 31 05:23:15 2021 - [error][/usr/local/share/perl5/MHA/MasterMonitor.pm, ln525] Error happened on monitoring servers.
Sat Jul 31 05:23:15 2021 - [info] Got exit code 1 (Not master dead).

MySQL Replication Health is NOT OK!

分析解决

1.主从复制做完后我是有做过数据库同步测试的，主从复制配置应该是没有问题的
2.然后到配置文件看是不是有问题

3.发现上面的配置文件路径应该是不对的，mysql安装时我选的路径是/usr/local/mysql/data，2个不匹配，重新修改再试试

依然还是not ok！

4.实在找不到还是什么原因，百度百度，说是从服务器上开启只读，查看已经配置过，应该不是这个问题

5.报错显示是188的服务器问题，查看服务正常，仔细检查后发现188的防火墙没关，心态又炸了

我以为这次肯定得好了吧，可是当我重新检查时还是not ok，有新的报错提示。好慌啊

报错显示应该是配置问题

mysqlbinlog version command failed with rc 1:0, please verify PATH, LD_LIBRARY_PATH, and client options

6.这个应该是变量的问题，应该是需要做软链接.，服务器重新做下软链接，服务器都做一下
ln -s /usr/local/mysql/bin/mysql /usr/sbin
ln -s /usr/local/mysql/bin/mysqlbinlog /usr/sbin

再检测还是not ok！哭了！报错又变了，说明还有其他的问题！

7.继续看报错

这个应该是字符集的问题，服务器配置文件里字符集注释一下

8.苍天啊大地啊，真的是历经磨难终于成功了，我要去睡觉了！