centos 让 mysql 随系统启动

[root@VM-8-12-centos ~]# systemctl enable mysql
Failed to execute operation: No such file or directory

 systemctl start mysqld
Job for mysqld.service failed because the control process exited with error code. See "systemctl status mysqld.service" and "journalctl -xe" for details.

解决方案：

# 在 /usr/lib/systemd/system/ 路径下创建 mysql.service
vim /usr/lib/systemd/system/mysql.service

[Unit]
Description=MySQL server
After=syslog.target network.target

[Service]
User=mysql
Group=mysql
Type=forking
TimeoutSec=0
#PermissionsStartOnly=true
ExecStart=/usr/local/mysql/bin/mysqld --defaults-file=/etc/my.cnf --daemonize
LimitNOFILE = 65535
Restart=on-failure
RestartSec=3
RestartPreventExitStatus=1
PrivateTmp=false

[Install]
WantedBy=multi-user.target

# 重新加载systemctl
systemctl daemon-reload

# 启动｜重启｜停止mysql     
systemctl start mysql
systemctl  restart  mysql
systemctl  stop mysql

# 设置开机启动/不启动mysql服务
systemctl enable  mysql
systemctl  disable mysql

# 查看状态
systemctl status mysql