feat: Allow to specify grace period for pod GC #5033
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cc @stefansedich who's looking for this feature as well. |
Love your work! Question however will this do what we want? If a pod shuts down right away the grace period won't help right? I believe this handles the time between pod stop and force kill. |
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A pod is added to the podCleanupQueue when it meets the podGCStrategy. This grace period is the time to wait before the pod in the queue gets deleted. |
config/config.go
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| @@ -92,6 +92,10 @@ type Config struct { | |||
| // PodSpecLogStrategy enables the logging of podspec on controller log. | |||
| PodSpecLogStrategy PodSpecLogStrategy `json:"podSpecLogStrategy,omitempty"` | |||
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| // PodGCGracePeriodSeconds specifies the duration in seconds before the pods in the GC queue get deleted. | |||
| // Value must be non-negative integer. Defaults to zero, which indicates delete immediately. | |||
| PodGCGracePeriodSeconds int64 `json:"podGCGracePeriodSeconds,omitempty"` | |||
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Updated this to be *int64 to be consistent with the type of DeleteOptions.GracePeriodSeconds.
workflow/controller/controller.go
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| err := pods.Delete(ctx, podName, metav1.DeleteOptions{PropagationPolicy: &propagation}) | ||
| err := pods.Delete(ctx, podName, metav1.DeleteOptions{ | ||
| PropagationPolicy: &propagation, | ||
| GracePeriodSeconds: pointer.Int64Ptr(wfc.Config.PodGCGracePeriodSeconds)}) |
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this is 30s by default, so presumably, you'll make this longer?
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Yes, it's necessary to make this longer for certain scenarios.
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@terrytangyuan @alexec I am still trying to understand how this change waits before deleing pods, this call here deletes the pod setting the grace-period-seconds, which as far as I understand what will happen:
- SIGTERM is sent to container
- SIGKILL is sent if container does not gracefully shutdown within the grace-period
If my container exits immediately after the SIGTERM or in this case is not even running as it is completed how is the grace period helping to delay it's deletion?
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For posterity, the above was resolved and implemented in #6168
Signed-off-by: terrytangyuan <terrytangyuan@gmail.com>
Signed-off-by: terrytangyuan <terrytangyuan@gmail.com>
Use case: we need some grace period to allow other services to complete the pod information collection (e.g. log and db persistence), especially during high load where those services have certain amount of delays.
Checklist: