数据库教程:MySQL MHA 报错处理

安装环境：centos 6.5 mysql 5.7.22 mha 0.56

1、找不到mysql 命令

sat mar 23 07:17:50 2019 – [info] connecting to root@192.168.32.181(server2:22)..
checking slave recovery environment settings..
opening /data/mysql/relay-log.info … ok.
relay log found at /data/mysql, up to server2-relay-bin.000005
temporary relay log file is /data/mysql/server2-relay-bin.000005
testing mysql connection and privileges..sh: mysql: command not found
mysql command failed with rc 127:0!

解决办法：找到mysql 的安装目录，创建适当的软链接

ln -s /usr/local/mysql/bin/mysqlbinlog /usr/local/bin/mysqlbinlog
ln -s /usr/local/mysql/bin/mysql /usr/local/bin/mysql

2、脚数据库技术:MySQL MHA 报错处理件没有执行权限

sat mar 23 07:25:46 2019 – [error][/usr/share/perl5/vendor_perl/mha/mastermonitor.pm, ln424] error happened on checking configurations. can’t exec “/usr/local/bin/master_ip_failover”: permission denied at /usr/share/perl5/vendor_perl/mha/managerutil.pm line 68.
sat mar 23 07:25:46 2019 – [error][/usr/share/perl5/vendor_perl/mha/mastermonitor.pm, ln523] error happened on monitoring servers.
sat mar 23 07:25:46 2019 – [info] got exit code 1 (not master dead).

mysql replication health is not ok!

解决办法：赋权

chmod +x /usr/local/bin/master_ip_failover

3、master_ip_failover脚本错误

sat mar 23 07:27:44 2019 – [info] checking master_ip_failover_script status:
sat mar 23 07:27:44 2019 – [info] /usr/local/bin/master_ip_failover –command=status –ssh_user=root –orig_master_host=server1 –orig_master_ip=192.168.32.180 –orig_master_port=3306
/usr/local/bin/master_ip_failover: line 4: use: command not found
/usr/local/bin/master_ip_failover: line 6: use: command not found
/usr/local/bin/master_ip_failover: line 10: use: command not found
/usr/local/bin/master_ip_failover: line 14: syntax error near unexpected token `newline’
/usr/local/bin/master_ip_failover: line 14: `my ( ‘
sat mar 23 07:27:44 2019 – [error][/usr/share/perl5/vendor_perl/mha/mastermonitor.pm, ln226] failed to get master_ip_failover_script status with return code 2:0.
sat mar 23 07:27:44 2019 – [error][/usr/share/perl5/vendor_perl/mha/mastermonitor.pm, ln424] error happened on checking configurations. at /usr/bin/masterha_check_repl line 48
sat mar 23 07:27:44 2019 – [error][/usr/share/perl5/vendor_perl/mha/mastermonitor.pm, ln523] error happened on monitoring servers.
sat mar 23 07:27:44 2019 – [info] got exit code 1 (not master dead).

解决办法：#!/usr/bin/env perl要最顶行

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