环境:mysql8.0 + centos7.6+ mha 0.58
主从状态检查时报错

[root@db03 ~]#  masterha_check_repl  --conf=/etc/mha/app1.cnf 
Tue Mar 31 21:12:38 2020 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping.
Tue Mar 31 21:12:38 2020 - [info] Reading application default configuration from /etc/mha/app1.cnf..
Tue Mar 31 21:12:38 2020 - [info] Reading server configuration from /etc/mha/app1.cnf..
Tue Mar 31 21:12:38 2020 - [info] MHA::MasterMonitor version 0.58.
Tue Mar 31 21:12:39 2020 - [error][/usr/share/perl5/vendor_perl/MHA/ServerManager.pm, ln188] There is no alive server. We can't do failover
Tue Mar 31 21:12:39 2020 - [error][/usr/share/perl5/vendor_perl/MHA/MasterMonitor.pm, ln427] Error happened on checking configurations.  at /usr/share/perl5/vendor_perl/MHA/MasterMonitor.pm line 329.
Tue Mar 31 21:12:39 2020 - [error][/usr/share/perl5/vendor_perl/MHA/MasterMonitor.pm, ln525] Error happened on monitoring servers.
Tue Mar 31 21:12:39 2020 - [info] Got exit code 1 (Not master dead).

解决方法:

在主库

db01 [(none)]>ALTER USER 'mha'@'10.0.0.%' IDENTIFIED WITH mysql_native_password BY 'mha';
db01 [(none)]>FLUSH PRIVILEGES;
db01 [(none)]>ALTER USER 'repl'@'10.0.0.%' IDENTIFIED WITH mysql_native_password BY '123';
db01 [(none)]>FLUSH PRIVILEGES;