CM启动无法连接MySQL问题

现象

CM启动完后，过一会就挂掉了，查看配置什么的都没有问题，查看异常日志发现是mysql连接问题

SCM错误信息

Mon May 17 17:24:02 CST 2021 WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification.

mysql日志信息

2021-05-17T09:18:49.649968Z 102 [Note] Bad handshake

原因

#查看mysql版本
mysql  Ver 14.14 Distrib 5.7.34, for Linux (x86_64) using  EditLine wrapper

查找文档发现mysql从5.7.28之后默认开了SSL连接，可以看到工作目录下面多了如下文件：

然而我们的连接默认是未使用SSL的，修改配置即可

解决方案

修改my.cnf配置，关掉ssl连接，添加如下：

[mysqld]
skip_ssl

重启mysql后，CM server也启动正常