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CSI documentation update for raw block volume support (#8927)

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* CSI documetation update for raw block volume support

* minor edits for "CSI raw block volume support"

Some small grammar and style nits.

* minor CSIBlockVolume edits
This commit is contained in:
Vladimir Vivien
2018-06-18 16:13:30 -04:00
committed by Misty Linville
parent 00b66727d5
commit 1307dc3801
2 changed files with 22 additions and 0 deletions
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content/en/docs/concepts/storage/volumes.md
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@@ -1153,6 +1153,26 @@ persistent volume:
secret is required. If the secret object contains more than one secret, all
secrets are passed.
#### CSI raw block volume support
{{< feature-state for_k8s_version="v1.11" state="alpha" >}}
Starting with version 1.11, CSI introduced support for raw block volumes, which
relies on the raw block volume feature that was introduced in a previous version of
Kubernetes. This feature will make it possible for vendors with external CSI drivers to
implement raw block volumes support in Kubernetes workloads.
CSI block volume support is feature-gated and turned off by default. To run CSI with
block volume support enabled, a cluster administrator must enable the feature for each
Kubernetes component using the following feature gate flags:
```
--feature-gates=BlockVolume=true,CSIBlockVolume=true
```
Learn how to
[setup your PV/PVC with raw block volume support](/docs/concepts/storage/persistent-volumes/#raw-block-volume-support).
### FlexVolume
`FlexVolume` is an out-of-tree plugin interface that has existed in Kubernetes
content/en/docs/reference/command-line-tools-reference/feature-gates.md
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@@ -40,6 +40,7 @@ different Kubernetes components.
| `CPUManager` | `true` | Beta | 1.10 | |
| `CRIContainerLogRotation` | `false` | Alpha | 1.10 | 1.10 |
| `CRIContainerLogRotation` | `true` | Beta| 1.11 | |
| `CSIBlockVolume` | `false` | Alpha | 1.11 | 1.11 |
| `CSIPersistentVolume` | `false` | Alpha | 1.9 | 1.9 |
| `CSIPersistentVolume` | `true` | Beta | 1.10 | |
| `CustomPodDNS` | `false` | Alpha | 1.9 | 1.9 |
@@ -152,6 +153,7 @@ Each feature gate is designed for enabling/disabling a specific feature:
for more details.
- `CPUManager`: Enable container level CPU affinity support, see [CPU Management Policies](/docs/tasks/administer-cluster/cpu-management-policies/).
- `CRIContainerLogRotation`: Enable container log rotation for cri container runtime.
- `CSIBlockVolume`: Enable external CSI volume drivers to support block storage. See the [`csi` raw block volume support](/docs/concepts/storage/volumes/#csi-raw-block-volume-support) documentation for more details.
- `CSIPersistentVolume`: Enable discovering and mounting volumes provisioned through a
[CSI (Container Storage Interface)](https://github.com/kubernetes/community/blob/master/contributors/design-proposals/storage/container-storage-interface.md)
compatible volume plugin.