feat(migrate): add support for spc to cspc migration

[shubham14bajpai]

Signed-off-by: shubham [email protected]

This PR adds the support for migrating spc to cspc using a k8s job.
Sample job yaml

---
apiVersion: batch/v1
kind: Job
metadata:
  name: migrate-spc-sparse-claim
  namespace: openebs
spec:
  backoffLimit: 0
  template:
    spec:
      #VERIFY the value of serviceAccountName is pointing to service account
      # created within openebs namespace. Use the non-default account.
      # by running `kubectl get sa -n <openebs-namespace>`
      serviceAccountName: openebs-maya-operator
      containers:
      - name:  migrate
        args:
        - "cstor-spc"
        # name of the spc that is to be migrated
        - "--spc-name=sparse-claim"

        #Following are optional parameters
        #Log Level
        - "--v=4"
        #DO NOT CHANGE BELOW PARAMETERS
        env:
        - name: OPENEBS_NAMESPACE
          valueFrom:
            fieldRef:
              fieldPath: metadata.namespace
        tty: true
        image: openebs/migrate-amd64:ci
      restartPolicy: Never
---

Sample job logs:

mayadata:setup$ k logs -f migrate-spc-sparse-claim-2x4bv
I0520 10:00:53.212255       1 pool.go:73] Migrating spc sparse-claim to cspc
I0520 10:00:53.401079       1 pool.go:334] Updating bdc bdc-17771e05-1c55-43ef-abb3-39dcc36472d4 with cspc labels & finalizer.
I0520 10:00:53.427844       1 pool.go:334] Updating bdc bdc-d9e6b0ff-c951-4081-903e-56bb71900adf with cspc labels & finalizer.
I0520 10:00:53.459935       1 pool.go:102] Creating equivalent cspc for spc sparse-claim
I0520 10:00:59.221476       1 pool.go:367] Updating bdc bdc-17771e05-1c55-43ef-abb3-39dcc36472d4 with cspc ownerRef.
I0520 10:00:59.233294       1 pool.go:367] Updating bdc bdc-d9e6b0ff-c951-4081-903e-56bb71900adf with cspc ownerRef.
I0520 10:00:59.510423       1 pool.go:221] Migrating csp sparse-claim-dzr2 to cspi sparse-claim-mbo2
I0520 10:00:59.510448       1 pool.go:282] Scaling down deployemnt sparse-claim-mbo2
I0520 10:01:25.674512       1 pool.go:395] Updating cvr pvc-9cf5a405-12c0-4522-b031-7816425f443f-sparse-claim-mbo2 with cspi sparse-claim-dzr2 info.
I0520 10:01:25.798889       1 pool.go:80] Successfully migrated spc sparse-claim to cspc

[mittachaitu]

Provided comments

[mittachaitu]

Provided few comments PTAL.

[mittachaitu]

Changes are good.. didn't looked deeply into build scripts

[prateekpandey14]

lgtm

[sonasingh46]

lgtm