systemd监听服务配置文件更新自动重启服务

背景&需求

需要频繁更改一个服务的配置文件进行测试

实现

配置服务的systemd文件

vim /lib/systemd/system/xxx.service
[Unit]
Description=xxx daemon, A rule-based proxy in Go.[Service]
Type=simple
ExecStart=/opt/xxx/xxx-d /etc/xxx/
Restart=always[Install]
WantedBy=multi-user.target

配置path服务

用来监听服务配置文件是否有变化

vim /lib/systemd/system/xxx-restart.path [Unit]
Description="monitor xxx configureation"
After=network-online.target
[Path]
Unit=xxx-restart.service
PathChanged=/etc/xxx/config.yaml[Install]
WantedBy=multi-user.target

配置执行重启的服务

vim /lib/systemd/system/xxx-restart.service [Unit]
Description=update xxx config,restart xxx service
After=network-online.target
[Service]
Type=oneshot
ExecStart=/usr/bin/systemctl restart xxx.service[Install]
WantedBy=multi-user.target

启动服务

systemctl daemon-reload
systemctl enable --now xxx.service
systemctl enable --now xxx-restart.path 
systemctl enable --now xxx-restart.service 

验证

随便更改监听的配置文件的内容

systemd服务会自动重启

refer

https://blog.csdn.net/sanhewuyang/article/details/127522317