如果重新启动依赖服务，如何重新启动服务 [英] How to restart a service if its dependent service is restarted

问题描述

一个服务(例如bar.service)依赖于另一个服务(例如foo.service)，如下所示

A service (say bar.service) is dependent on another service (say foo.service), like below

酒吧的服务文件:

[Unit]
After=foo.service
Requires=foo.service
...

如果foo.service重新启动(无论是手动还是由于错误)，bar.service也如何自动重新启动?

If foo.service is restarted (either manually or due to a bug), how can bar.service be automatically restarted as well?

推荐答案

您可以使用PartOf.

[Unit]
After=foo.service
Requires=foo.service
PartOf=foo.service

在systemd.unit手册页中:

PartOf =

PartOf=

配置与Requires =类似的依赖关系，但仅限于停止和重新启动单元.当systemd停止或重新启动此处列出的单元时，操作将传播到该单元.请注意，这是一种单向依赖性，对此单位的更改不会影响列出的单位.

Configures dependencies similar to Requires=, but limited to stopping and restarting of units. When systemd stops or restarts the units listed here, the action is propagated to this unit. Note that this is a one-way dependency — changes to this unit do not affect the listed units.

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