kubernetes - k8s- Pane 重启时间

Question

我正在运行此程序以查看作业重新启动在k8s中的工作方式。

kubectl run alpine --image=alpine --restart=OnFailure -- exit 1

Alpine 的影像已经在那里。第一次故障几乎在一秒钟内发生。 k8s需要5分钟才能完成5次重启!为什么不立即尝试？有什么办法可以减少两次重启之间的时间？

Answer 1

看看Pod Lifecycle文档:

Exited Containers that are restarted by the kubelet are restarted with an exponential back-off delay (10s, 20s, 40s …) capped at five minutes, and is reset after ten minutes of successful execution.

我认为没有办法配置退避延迟时间。
编辑:有一个 open issue请求此功能。

另外，请注意，使用 kubectl run 并不是在模拟“作业重新启动” 。作业由 Job Controllers管理，当处理pod / container错误时，它的行为略有不同，因为它考虑了 restartPolicy， parallelism， completions和 backoffLimit配置的组合:

There are situations where you want to fail a Job after some amount of retries due to a logical error in configuration etc. To do so, set .spec.backoffLimit to specify the number of retries before considering a Job as failed. The back-off limit is set by default to 6. Failed Pods associated with the Job are recreated by the Job controller with an exponential back-off delay (10s, 20s, 40s …) capped at six minutes.