mysql启动失败问题
**背景**
启动好签服务时，部分用户会遇到mysql 启动失败问题，例如：
# libaio 缺失
**确认**
- 查看 服务器上是否安装了libaio
`rpm -qa|grep libaio`
若未查找到任何信息，则需要安装依赖库
- 查看具体错误详情
`/opt/wellsign-sdko-off/mysql/bin/mysqld --defaults-file=/opt/wellsign-sdko-off/mysql/my.cnf --initialize-insecure`
查看 具体错误
**安装方法**
- 使用yum命令安装依赖库
`yum install -y libaio`
- 根据错误详情，安装缺失依赖
# numactl 缺失
错误信息
```shell
/opt/wellsign-sdko-off/mysql/bin/mysqld --defaults-file=/opt/wellsign-sdko-off/mysql/my.cnf --initialize-insecure
/opt/wellsign-sdko-off/mysql/bin/mysqld: error while loading shared libraries: libnuma.so.1: cannot open shared object file: No such file or directory
```
安装numctl
```shell
# yum install numactl
```
再次启动好签服务