Ubuntu Service脚本编写示例
使用 Linux 时经常用到 ` service mysql restart ` 等命令, 方便进行服务的操作, 具体的服务是怎么写的呢,通过以下示例将了解以下内容:
- 如何写一个简单的服务
- 服务异常关闭时能自动开启配置
简单的示例
nano /lib/systemd/system/xx.service
- [Unit]
- Description=Check GPU INFO by chenwei # 服务描述
- Wants=network-online.target # 服务依赖于网络
- After=network-online.target
- [Service]
- Type=simple
- ExecStart=/root/shell/agent/chkgpu # 服务开启时执行脚本
- ExecReload=/bin/kill -HUP $MAINPID # 服务重新加载时执行脚本
- RestartSec=5s # 自动启动间隔时间
- Restart=on-failure # 在什么情况下会自动重启
- [Install]
- WantedBy=multi-user.target
- [Unit]
- Description=Advanced key-value store
- After=network.target
- [Service]
- Type=forking
- ExecStart=/usr/local/redis/bin/redis-server /usr/local/redis/etc/redis.conf
- ExecStop=/bin/kill -s TERM $MAINPID
- PIDFile=/var/run/redis_6379.pid
- Restart=always
- RestartSec=5s
- Restart=on-failure
- [Install]
- WantedBy=multi-user.target
- Alias=redis.service
nginx 示例
- [Unit]
- Description=A high performance web server and a reverse proxy server
- After=network.target
- [Service]
- Type=forking
- PIDFile=/var/run/nginx.pid
- #ExecStartPre=/usr/local/nginx/sbin/nginx
- ExecStart=/usr/sbin/nginx
- ExecReload=/usr/sbin/nginx -s reload
- ExecStop=-/sbin/start-stop-daemon --quiet --stop --retry QUIT/5 --pidfile /run/nginx.pid
- TimeoutStopSec=5
- KillMode=mixed
- [Install]
- WantedBy=multi-user.target
常用命令
- systemctl enable --now nginx.service # 立刻开启并开机启动
- systemctl daemon-reload #重新加载
- systemctl enable nginx.service #开机时启动
- systemctl disable nginx.service #开机时禁用
- systemctl list-unit-files|grep enabled #已启动服务列表
- systemctl --failed #启动失败服务列表
wssh
- file=/lib/systemd/system/myssh.service mv $file $file.bak cat «EOF »$file
- [Unit] Description=Web SSH server by chenwei. pip install webssh Wants=network-online.target
- After=network-online.target
- [Service] Type=simple ExecStart=wssh ExecReload=/bin/kill -HUP $MAINPID
- RestartSec=5s
- Restart=on-failure
- [Install] WantedBy=multi-user.target
- EOF cat $file
issh
- file=/usr/bin/issh
- mv $file $file.bak
- cat <<EOF >>$file
- #!/bin/bash
- wssh
- autossh -M 10111 -NR 0.0.0.0:11111:localhost:22 pc@1.10sh.cn
- EOF
- cat $file
- chmod +x $file
- file=/lib/systemd/system/issh.service
- mv $file $file.bak
- cat <<EOF >>$file
- [Unit]
- Description=autossh shell to connect to my server by chenwei. #sudo apt install autossh
- Wants=network-online.target
- After=network-online.target
- [Service]
- Type=simple
- ExecStart=/usr/bin/issh
- ExecReload=/bin/kill -HUP
- RestartSec=5s
- Restart=on-failure
- [Install]
- WantedBy=multi-user.target
- EOF
- cat $file
- systemctl enable --now issh.service
- systemctl status issh.service
pweb
使用python 启动一个简单的 http 文件服务。
- sudo -i
- file=/home/pweb.sh
- mv $file $file.bak
- cat <<EOF >>$file
- #!/bin/bash
- python3 -m http.server
- EOF
- cat $file
- chmod +x $file
- file=/lib/systemd/system/pweb.service
- mv $file $file.bak
- cat <<EOF >>$file
- [Unit]
- Description=Simple python pweb by chenwei.
- Wants=network-online.target
- After=network-online.target
- [Service]
- Type=simple
- ExecStart=/home/pweb.sh
- ExecReload=/bin/kill -HUP
- RestartSec=5s
- Restart=on-failure
- [Install]
- WantedBy=multi-user.target
- EOF
- cat $file
- systemctl enable --now pweb.service
- systemctl status pweb.service
原文地址:https://www.toutiao.com/a7005179018735518246/
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