CentOS8创建开机启动服务

1、以开机启动EMQX为例。

2、创建开机启动脚本

[root@centos8 startup]$ vim emqx-startup.sh

#!/bin/bash
#description: emqx启动服务

#获取传入命令
cmd=$1

#获取emqx进程ID
pid=`ps -ef | grep run_erl | grep /usr/local/emqx/bin/emqx | awk '{print $2}'`

if [ ! $cmd ]; then
  echo "please input cmd {start|restart|stop|status}"
  exit
fi

#写入日志
echo "-----------------------------------------------------------------------------"  >> /root/startup/emqx.log
echo -e "`date +%Y/%D/%H:%M` emqx exec $cmd start." >> /root/startup/emqx.log

if [ $cmd == 'start' ]; then
  if [ ! $pid ]; then
    /usr/local/emqx/bin/emqx start
  else
    echo "emqx is running, pid is $pid."
  fi
fi

if [ $cmd == 'stop' ]; then
  if [ $pid ]; then
    /usr/local/emqx/bin/emqx stop
  else
    echo "emqx is already stop."
  fi
fi

if [ $cmd == 'status' ]; then
   /usr/local/emqx/bin/emqx_ctl status
fi

echo -e "`date +%Y/%D/%H:%M` emqx exec $cmd end." >> /root/startup/emqx.log
echo " " >> /root/startup/emqx.log

2、赋予脚本可执行权限

chmod +x emqx-startup.sh

3、验证脚本

[root@centos8 startup]$ ./emqx-startup.sh start

[root@centos8 startup]$ ./emqx-startup.sh stop

[root@centos8 startup]$ ./emqx-startup.sh status

4、进入进入systemd配置文件目录创建service服务

[root@centos8 ~]$ cd /usr/lib/systemd/system

[root@centos8 system]$ vim emqx-autorun.service

[Unit]
Description=emqx for auto start
Wants=network-online.target

[Service]
User=root
Type=forking
ExecStart=/usr/bin/bash /root/startup/emqx-startup.sh start
ExecStop=/usr/bin/bash /root/startup/emqx-startup.sh stop

[Install]
WantedBy=multi-user.target

5、重新加载systemd配置

[root@centos8 ~]# systemctl daemon-reload

6、添加开机自启动

[root@centos8 system]# systemctl enable emqx-autorun.service
Created symlink /etc/systemd/system/multi-user.target.wants/emqx-autorun.service → /usr/lib/systemd/system/emqx-autorun.service.

7、启动停止测试

[root@centos8 system]# systemctl start emqx-autorun
[root@centos8 system]# systemctl status emqx-autorun

8、重启验证

关于systemd配置说明，传送门：https://www.cnblogs.com/hunttown/p/14872185.html