[cinder-csi-plugin] Support of one storage class for Multi region/clouds

[Boston01]

What this PR does / why we need it: Supporting multiple regions and clouds requires creating additional secrets for the OpenStack cloud provider. This ensures the correct identification of the region or zone from which a requested volume originates, allowing it to be properly attached to an instance within the same region or zone.

To bring OpenStack to the same level as AWS, GCP, and AKS in terms of high availability and seamless storage management with a single storage class, this pull request introduces enhancements that enable OpenStack to handle storage provisioning in a similar manner.

Which issue this PR fixes(if applicable):
fixes #

Special notes for reviewers:

Define a single storage class

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: perf1-delete
parameters:
  type: perf1
provisioner: cinder.csi.openstack.org
reclaimPolicy: Delete
volumeBindingMode: WaitForFirstConsumer

Define a statefulset with 3 replicas with an anti-affinity in order to have on pod per zone

apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: nginx
  namespace: nginx
spec:
  serviceName: nginx
  replicas: 3
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      affinity:
        nodeAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            nodeSelectorTerms:
              - matchExpressions:
                  - key: topology.kubernetes.io/zone
                    operator: In
                    values:
                      - par1
                      - par2
                      - par3
        podAntiAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            - labelSelector:
                matchLabels:
                  app: nginx
              topologyKey: topology.kubernetes.io/zone
      containers:
      - name: nginx-app
        image: nginx
        volumeMounts:
        - name: data
          mountPath: /data
  volumeClaimTemplates:
  - metadata:
      name: data
    spec:
      accessModes: [ "ReadWriteOnce" ]
      storageClassName: perf1-delete
      resources:
        requests:
          storage: 12Gi

List of storage class

(⎈|kubernetes-admin@platform-preprod-k8s:N/A)ansoufall ~/.kube  $ kubectl get storageclasses.storage.k8s.io
NAME           PROVISIONER                RECLAIMPOLICY   VOLUMEBINDINGMODE      ALLOWVOLUMEEXPANSION   AGE
perf1-delete   cinder.csi.openstack.org   Delete          WaitForFirstConsumer   true                   3h19m

List of pods on the spread wide kubernetes with zone par1, par2 and par3

(⎈|kubernetes-admin@platform-preprod-k8s:N/A)ansoufall ~/.kube  $ kubectl  -n nginx get po -owide
NAME      READY   STATUS    RESTARTS   AGE     IP              NODE                                 NOMINATED NODE   READINESS GATES
nginx-0   1/1     Running   0          3h16m   192.168.6.177   par3-platform-preprod-k8s-worker-3   <none>           <none>
nginx-1   1/1     Running   0          3h16m   192.168.4.96    par1-platform-preprod-k8s-worker-1   <none>           <none>
nginx-2   1/1     Running   0          3h16m   192.168.7.6     par2-platform-preprod-k8s-worker-3   <none>           <none>

List of persistent volumes

(⎈|kubernetes-admin@platform-preprod-k8s:N/A)ansoufall ~/.kube  $ kubectl get pv
NAME                                       CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS   CLAIM                STORAGECLASS   VOLUMEATTRIBUTESCLASS   REASON   AGE
pvc-17f3547e-6bca-4914-bdd6-bacedf994556   12Gi       RWO            Delete           Bound    nginx/data-nginx-0   perf1-delete   <unset>                          3h24m
pvc-bc4e5b68-2cca-4614-8bac-45687e0694e7   12Gi       RWO            Delete           Bound    nginx/data-nginx-2   perf1-delete   <unset>                          3h23m
pvc-ea2c54b8-483a-42aa-9c86-6fd1ebc39791   12Gi       RWO            Delete           Bound    nginx/data-nginx-1   perf1-delete   <unset>                          3h23m

List of persistent volumes claims

(⎈|kubernetes-admin@platform-preprod-k8s:N/A)ansoufall ~/.kube  $ kubectl  -n nginx get pvc
NAME           STATUS   VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS   VOLUMEATTRIBUTESCLASS   AGE
data-nginx-0   Bound    pvc-17f3547e-6bca-4914-bdd6-bacedf994556   12Gi       RWO            perf1-delete   <unset>                 3h28m
data-nginx-1   Bound    pvc-ea2c54b8-483a-42aa-9c86-6fd1ebc39791   12Gi       RWO            perf1-delete   <unset>                 3h25m
data-nginx-2   Bound    pvc-bc4e5b68-2cca-4614-8bac-45687e0694e7   12Gi       RWO            perf1-delete   <unset>                 3h25m

Release note:

NONE

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• ✅ login: Boston01 / name: Ansou FALL (c6a8f80, d99c979)

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[pabclsn]

Much needed thanks a lot

[zetaab]

/ok-to-test

[zetaab]

well, I do not like that this PR is now mixing terminology everywhere. If you are using 3 different API endpoints, it usually means that you are using 3 different REGIONS not zones (like PR title says).

[pabclsn]

@zetaab In openstack a region is a zone if you use the general cloud provider definition of a region, a region is composed of multiple zones.
What do you think ?