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Revise Pod concept (#22603)

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* Revise Pod concept

Adapt the existing Pod documentation to suit the Docsy theme, by
promoting the Pod concept itself to /docs/concepts/workloads/pods/

Following on from this, update the Pod Lifecycle page to cover the
lifecycle of a Pod and follow on directly from the Pod concept,
for readers keen to understand things in detail.

This change also removes the automatic contents list from the Pod
overview page. Instead, the new page links to all the pages
inside the Pod section.

* Update links to Pod concept

Link to updated content

* Incorporate Pod concept suggestions

Co-authored-by: Celeste Horgan <celeste@cncf.io>

* Revise StatefulSet suggestion for Pod concept

Co-authored-by: Celeste Horgan <celeste@cncf.io>

Co-authored-by: Celeste Horgan <celeste@cncf.io>
This commit is contained in:
Tim Bannister
2020-07-27 04:18:16 +01:00
committed by GitHub
parent c80c9c40c1
commit 49eee8fd3d
31 changed files with 704 additions and 736 deletions
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content/en/docs/tasks/run-application/force-delete-stateful-set-pod.md
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@@ -37,7 +37,7 @@ You can perform a graceful pod deletion with the following command:
kubectl delete pods <pod>
```
For the above to lead to graceful termination, the Pod **must not** specify a `pod.Spec.TerminationGracePeriodSeconds` of 0. The practice of setting a `pod.Spec.TerminationGracePeriodSeconds` of 0 seconds is unsafe and strongly discouraged for StatefulSet Pods. Graceful deletion is safe and will ensure that the [Pod shuts down gracefully](/docs/concepts/workloads/pods/pod/#termination-of-pods) before the kubelet deletes the name from the apiserver.
For the above to lead to graceful termination, the Pod **must not** specify a `pod.Spec.TerminationGracePeriodSeconds` of 0. The practice of setting a `pod.Spec.TerminationGracePeriodSeconds` of 0 seconds is unsafe and strongly discouraged for StatefulSet Pods. Graceful deletion is safe and will ensure that the Pod [shuts down gracefully](/docs/concepts/workloads/pods/pod-lifecycle/#pod-termination) before the kubelet deletes the name from the apiserver.
Kubernetes (versions 1.5 or newer) will not delete Pods just because a Node is unreachable. The Pods running on an unreachable Node enter the 'Terminating' or 'Unknown' state after a [timeout](/docs/admin/node/#node-condition). Pods may also enter these states when the user attempts graceful deletion of a Pod on an unreachable Node. The only ways in which a Pod in such a state can be removed from the apiserver are as follows: