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Postpone Deletion of a Persistent Volume Claim in case It Is Used by a Pod (#6415)

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* Postpone Deletion of a Persistent Volume Claim in case It Is Used by a Pod

A new feature PVC Protection was added into K8s 1.9 that's why this documentation change is needed.

* Added tag at the top of each new area.

* Fix typo

* Fix: switched on in (all kubelets) -> (all K8s components).

* Added link to admission controller

* Moved PVC Protection configuration into Before you begin section.

* Added steps how to verify PVC Protection feature.

* Fixes for admission controller plugin description and for PVC Protection description in PVC lifecycle.

* Testing official rendering of enumerations (1., 2., 3., etc.)

* Re-write to address comments from review.

* Fixed definition when a PVC is in active use by a pod.
This commit is contained in:
Pavel Pospisil
2017-12-07 21:44:53 +01:00
committed by Zach Corleissen
parent 25f581ec39
commit a6eb85887d
5 changed files with 173 additions and 0 deletions
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docs/admin/admission-controllers.md
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@@ -329,6 +329,10 @@ This plug-in also protects the access to `metadata.ownerReferences[x].blockOwner
of an object, so that only users with "update" permission to the `finalizers`
subresource of the referenced *owner* can change it.
### Persistent Volume Claim Protection (alpha)
{% assign for_k8s_version="v1.9" %}{% include feature-state-alpha.md %}
The `PVCProtection` plugin adds the `kubernetes.io/pvc-protection` finalizer to newly created Persistent Volume Claims (PVCs). In case a user deletes a PVC the PVC is not removed until the finalizer is removed from the PVC by PVC Protection Controller. Refer to the [PVC Protection](/docs/concepts/storage/persistent-volumes/#persistent-volume-claim-protection) for more detailed information.
### PersistentVolumeLabel
This plug-in automatically attaches region or zone labels to PersistentVolumes