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update readme for raw block pvc

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
This commit is contained in:
Madhu Rajanna 2019-03-05 17:46:17 +05:30
parent ef74050af2
commit 9bebd829ab

View File

@ -216,3 +216,65 @@ spec:
If you access the pod you can check that your data is avaialable at
`/var/lib/www/html`
## Testing Raw Block feature in kubernetes with RBD volumes
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
these feature-gates must be enabled on both api-server and kubelet
### create a raw-block PVC
```yaml
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: raw-block-pvc
spec:
accessModes:
- ReadWriteOnce
volumeMode: Block
resources:
requests:
storage: 1Gi
storageClassName: csi-rbd
```
create raw block pvc
```console
kubectl create -f raw-block-pvc.yaml
```
### create a pod to mount raw-block PVC
```yaml
---
apiVersion: v1
kind: Pod
metadata:
name: pod-with-raw-block-volume
spec:
containers:
- name: fc-container
image: fedora:26
command: ["/bin/sh", "-c"]
args: [ "tail -f /dev/null" ]
volumeDevices:
- name: data
devicePath: /dev/xvda
volumes:
- name: data
persistentVolumeClaim:
claimName: raw-block-pvc
```
Create a POD that uses raw block PVC
```console
kubectl create -f raw-block-pod.yaml
```