Create ReadWriteOnce Persistent Volume ClaimsΒΆ
Container images have an ephemeral file system by default. For data to survive beyond the lifetime of a container, it can read and write files to a persistent volume obtained with a PVC created to provide persistent storage.
About this task
The following steps show an example of creating two 1GB PVCs with ReadWriteOnce accessMode.
Procedure
Create the rwo-test-claim1 Persistent Volume Claim.
Create a yaml file defining the claim and its attributes.
For example:
~(keystone_admin)]$ cat <<EOF > rwo-claim1.yaml kind: PersistentVolumeClaim apiVersion: v1 metadata: name: rwo-test-claim1 spec: accessModes: - ReadWriteOnce resources: requests: storage: 1Gi storageClassName: general EOF
Apply the settings created above.
~(keystone_admin)]$ kubectl apply -f rwo-claim1.yaml persistentvolumeclaim/rwo-test-claim1 created
Create the rwo-test-claim2 Persistent Volume Claim.
Create a yaml file defining the claim and its attributes.
For example:
~(keystone_admin)]$ cat <<EOF > rwo-claim2.yaml kind: PersistentVolumeClaim apiVersion: v1 metadata: name: rwo-test-claim2 spec: accessModes: - ReadWriteOnce resources: requests: storage: 1Gi storageClassName: general EOF
Apply the settings created above.
~(keystone_admin)]$ kubectl apply -f rwo-claim2.yaml persistentvolumeclaim/rwo-test-claim2 created
Results
Two 1Gb PVCs have been created. You can view the PVCs using the following command.
~(keystone_admin)]$ kubectl get persistentvolumeclaims
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS
rwo-test-claim1 Bound pvc-aaca.. 1Gi RWO general
rwo-test-claim2 Bound pvc-e93f.. 1Gi RWO general
~(keystone_admin)]$ kubectl get persistentvolume
NAME CAPACITY ACCESS.. RECLAIM.. STATUS CLAIM STORAGECLASS
pvc-08d8.. 1Gi RWO Delete Bound default/rwo-test-claim1 general
pvc-af10.. 1Gi RWO Delete Bound default/rwo-test-claim2 general