CODEWITHSUNDEEP
kubernetes
iAmoric
iAmoric

Reputation: 1975

Kubernetes job restarts even with restartPolicy: "Never"

I have a job with restartPolicy: "Never" which ends with "Error"

With Status : Error this job should not restart.

However, a new pod is created again and again each time the previous job fails :

$ kubectl get pods
kafka-pvbqk          0/1     Error              0          2m19s
kafka-ttt95          0/1     Error              0          109s
kafka-7fqgl          0/1     Error              0          69s
kafka-rrmlk          0/1     PodInitializing    0          2s

I know first thing should be to fix the error but I also want to understand why the pod restarts and how to avoid that ?

Thanks

Upvotes: 12

Views: 6962

Answers (1)

Arghya Sadhu
Arghya Sadhu

Reputation: 44687

That is correct behavior and not a bug. The restart policy you're pointing to is about Pod, not a job itself.

To fail a Job after some amount of retries 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. The back-off count is reset when a Job's Pod is deleted or successful without any other Pods for the Job failing around that time.

Upvotes: 21

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