Deploying Pre-Provisioned Block PV PVC and POD

Follow these steps to statically create a PVC in a new Kubernetes cluster, using the information from the leftover underlying volume.

Note

If you are reusing a volume from another Kubernetes cluster, delete the PVC and PV objects from the old Kubernetes cluster before creating a PV in the new Kubernetes cluster.

Deploying a Block Workload

This chart will create three resources on the cluster:

PV pointing to the volume on the Lightbits cluster.
PVC that will bind to this PV (match the size and labels).
POD that will consume this PVC and will run a simple workload on that volume.

helm install --set preprovisioned.enabled=true \

--set global.storageClass.mgmtEndpoints="10.20.131.24:443\\,10.20.131.2:443\\,10.20.131.6:443\\,192.168.18.96:443\\,192.168.18.99:443\\,192.168.20.24:443" \

--set global.jwtSecret.name="example-secret" \

--set global.jwtSecret.namespace="default" \

--set preprovisioned.lightosVolNguid=0e436046-4bd2-4d71-a55d-8dc1ea33307c \

--set preprovisioned.volumeMode=Block \

--set preprovisioned.storage=1Gi \

lb-csi-preprovisioned-volume \

lightbits-helm-repo/lb-csi-workload-examples

Will output:

NAME: lb-csi-preprovisioned-volume

LAST DEPLOYED: Sun Feb 21 16:09:02 2021

NAMESPACE: default

STATUS: deployed

REVISION: 1

TEST SUITE: None

Creating a PVC that Binds to the New PV

Define the following PVC resource file - pvc.yml:

kind: PersistentVolumeClaim

apiVersion: v1

metadata:

name: pre-provisioned-pvc

spec:

accessModes:

- ReadWriteOnce

resources:

requests:

storage: 1Gi

storageClassName: example-sc

volumeMode: Block

volumeName: example-pre-provisioned-pv

And create this resource:

kubectl create -f pvc.yml

Verifying that the PVC is Bounded to the PV

Verify that 'PV' and 'PVC' are created and in 'Bounded' state, and that 'POD' is in 'Running' state.

kubectl get pv,pvc,pods

NAME CAPACITY ACCESS MODES RECLAIM POLICY STATUS CLAIM STORAGECLASS

pv/example-pre-provisioned-pv 1Gi RWO Delete Bound default/example-pre-provisioned-pvc example-sc

NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS

pvc/example-pre-provisioned-pvc Bound example-pre-provisioned-pv 1Gi RWO example-sc

NAME READY STATUS RESTARTS AGE

pod/example-pre-provisioned-pod 1/1 Running 0 26m

Deleting Resources

Delete release:

helm uninstall lb-csi-preprovisioned-volume

Verify that all resources are gone.

kubectl get pv,pvc

No resources found in default namespace.

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