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Bring PVC Protection Feature to Beta (#7165)
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* Bring PVC Protection Feature to Beta

The PR: kubernetes/kubernetes#59052
brought PVC Protection feature to beta.

That's why the documentation is updated accordingly.

* The PVC Protection feature was renamed to Storage Protection. That's why the documentation is updated.
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pospispa authored and k8s-ci-robot committed Feb 27, 2018
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6 changes: 3 additions & 3 deletions docs/admin/admission-controllers.md
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Expand Up @@ -414,9 +414,9 @@ This admission controller also protects the access to `metadata.ownerReferences[
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.
### Storage Protection (beta)
{% assign for_k8s_version="v1.10" %}{% include feature-state-beta.md %}
The `StorageProtection` plugin adds the `kubernetes.io/pvc-protection` or `kubernetes.io/pv-protection` finalizers to newly created Persistent Volume Claims (PVCs) or Persistent Volumes (PV). In case a user deletes a PVC or PV the PVC or PV is not removed until the finalizer is removed from the PVC or PV by PVC or PV Protection Controller. Refer to the [PVC Protection](/docs/concepts/storage/persistent-volumes/#persistent-volume-claim-protection) for more detailed information.

### PersistentVolumeLabel (DEPRECATED)

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10 changes: 5 additions & 5 deletions docs/concepts/storage/persistent-volumes.md
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Expand Up @@ -70,14 +70,14 @@ Pods use claims as volumes. The cluster inspects the claim to find the bound vol

Once a user has a claim and that claim is bound, the bound PV belongs to the user for as long as they need it. Users schedule Pods and access their claimed PVs by including a `persistentVolumeClaim` in their Pod's volumes block. [See below for syntax details](#claims-as-volumes).

### Persistent Volume Claim Protection
{% assign for_k8s_version="v1.9" %}{% include feature-state-alpha.md %}
The purpose of the PVC protection is to ensure that PVCs in active use by a pod are not removed from the system as this may result in data loss.
### Storage Protection
{% assign for_k8s_version="v1.10" %}{% include feature-state-beta.md %}
The purpose of the Storage Protection feature is to ensure that Persistent Volume Claims (PVCs) in active use by a pod are not removed from the system as this may result in data loss.

**Note:** PVC is in active use by a pod when the the pod status is `Pending` and the pod is assigned to a node or the pod status is `Running`.
**Note:** PVC is in active use by a pod when the pod status is `Pending` and the pod is assigned to a node or the pod status is `Running`.
{: .note}

When the [PVC protection alpha feature](/docs/tasks/administer-cluster/pvc-protection/) is enabled, if a user deletes a PVC in active use by a pod, the PVC is not removed immediately. PVC removal is postponed until the PVC is no longer actively used by any pods.
When the [Storage Protection beta feature](/docs/tasks/administer-cluster/pvc-protection/) is enabled, if a user deletes a PVC in active use by a pod, the PVC is not removed immediately. PVC removal is postponed until the PVC is no longer actively used by any pods.

You can see that a PVC is protected when the PVC's status is `Terminating` and the `Finalizers` list includes `kubernetes.io/pvc-protection`:
```shell
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15 changes: 6 additions & 9 deletions docs/tasks/administer-cluster/pvc-protection.md
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Expand Up @@ -2,28 +2,25 @@
approvers:
- msau42
- jsafrane
title: Persistent Volume Claim Protection
title: Storage Protection
---

{% capture overview %}
{% assign for_k8s_version="v1.9" %}{% include feature-state-alpha.md %}
{% assign for_k8s_version="v1.10" %}{% include feature-state-beta.md %}

As of Kubernetes 1.9, persistent volume claims (PVCs) that are in active use by a pod can be protected from pre-mature removal.
Persistent volume claims (PVCs) that are in active use by a pod can be protected from pre-mature removal.

{% endcapture %}

{% capture prerequisites %}

- A v1.9 or higher Kubernetes must be installed.
- As PVC Protection is a Kubernetes v1.9 alpha feature it must be enabled:
1. [Admission controller](/docs/admin/admission-controllers/) must be started with the [PVC Protection plugin](/docs/admin/admission-controllers/#persistent-volume-claim-protection-alpha).
2. All Kubernetes components must be started with the `PVCProtection` alpha features enabled.
- The Storage Protection feature is enabled in a version of Kubernetes in which it is supported.

{% endcapture %}

{% capture steps %}

## PVC Protection Verification
## Storage Protection feature used for PVC Protection

The example below uses a GCE PD `StorageClass`, however, similar steps can be performed for any volume type.

Expand Down Expand Up @@ -216,7 +213,7 @@ spec:
Warning FailedScheduling 18s (x4 over 21s) default-scheduler persistentvolumeclaim "slzc" is being deleted
```

- Wait until the pod status of both pods is `Terminated` (either delete the pods or wait until they finish). Afterwards, check that the PVC is removed.
- Wait until the pod status of both pods is `Terminated` or `Completed` (either delete the pods or wait until they finish). Afterwards, check that the PVC is removed.

{% endcapture %}

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