Not able to create cluster : spec.storageConfig.additionalVolumes[0].pvcSpec: Required value

[gk-fschubert]

What happened?

I want to start with k8ssandra and started with a relative simple configuration.
There are 3 different clusters. One of them should host the operator and the other two should host the data planes.

I've followed the documentation:

• added the helm repo
• installed the k8ssandra-operator on the operator node in controlPlane mode
• installed the k8ssandra-operator on the two data nodes with controlPlane=False
• added the kubeconfig as secret
• created the clientConfig CRD
• created the k8ssandraCluster CRD

The issue is that the operator always prints this error:
Error: CassandraDatacenter.cassandra.datastax.com "jenslab" is invalid: spec.storageConfig.additionalVolumes[0].pvcSpec: Required value
As far as I understood the CRD docs (v 1.17.0) additionalVolumes are optional.
And even If I declare additionalVolumes, the error is the same except for the index where the issue is raises
Error: CassandraDatacenter.cassandra.datastax.com "jenslab" is invalid: spec.storageConfig.additionalVolumes[3].pvcSpec: Required value

is there something wrong with my CRD definition?

apiVersion: k8ssandra.io/v1alpha1
kind: K8ssandraCluster
metadata:
  name: test-database
  namespace: k8ssandra-operator
spec:
  reaper: 
  stargate:
    size: 1
    heapSize: 256M
  cassandra:
    serverVersion: "4.0.1"
    config:
      jvmOptions:
        heapSize: 512M
    networking:
      hostNetwork: false
    datacenters:
      - metadata:
          name: jenslab
        k8sContext: jens-lab
        size: 3
        storageConfig:
          cassandraDataVolumeClaimSpec:
            storageClassName: do-block-storage
            accessModes:
              - ReadWriteOnce
            resources:
              requests:
                storage: 20Gi
      - metadata:
          name: lab
        k8sContext: lab
        size: 3
        storageConfig:
          cassandraDataVolumeClaimSpec:
            storageClassName: default
            accessModes:
              - ReadWriteOnce
            resources:
              requests:
                storage: 20Gi

Environment

• K8ssandra Operator version:
  Operator image: cr.k8ssandra.io/k8ssandra/k8ssandra-operator:v1.17.0

$ kubectl describe deployment k8ssandra-operator -n k8ssandra-operator
Name:                   k8ssandra-operator
Namespace:              k8ssandra-operator
CreationTimestamp:      Thu, 18 Jul 2024 14:54:31 +0200
Labels:                 app.kubernetes.io/instance=k8ssandra-operator
                        app.kubernetes.io/managed-by=Helm
                        app.kubernetes.io/name=k8ssandra-operator
                        app.kubernetes.io/part-of=k8ssandra-k8ssandra-operator-k8ssandra-operator
                        control-plane=k8ssandra-operator
                        helm.sh/chart=k8ssandra-operator-1.17.0
Annotations:            deployment.kubernetes.io/revision: 1
                        meta.helm.sh/release-name: k8ssandra-operator
                        meta.helm.sh/release-namespace: k8ssandra-operator
Selector:               app.kubernetes.io/instance=k8ssandra-operator,app.kubernetes.io/name=k8ssandra-operator,app.kubernetes.io/part-of=k8ssandra-k8ssandra-operator-k8ssandra-operator,control-plane=k8ssandra-operator
Replicas:               1 desired | 1 updated | 1 total | 1 available | 0 unavailable
StrategyType:           RollingUpdate
MinReadySeconds:        0
RollingUpdateStrategy:  25% max unavailable, 25% max surge
Pod Template:
  Labels:           app.kubernetes.io/instance=k8ssandra-operator
                    app.kubernetes.io/managed-by=Helm
                    app.kubernetes.io/name=k8ssandra-operator
                    app.kubernetes.io/part-of=k8ssandra-k8ssandra-operator-k8ssandra-operator
                    control-plane=k8ssandra-operator
                    helm.sh/chart=k8ssandra-operator-1.17.0
  Service Account:  k8ssandra-operator
  Containers:
   k8ssandra-operator:
    Image:      cr.k8ssandra.io/k8ssandra/k8ssandra-operator:v1.17.0
    Port:       9443/TCP
    Host Port:  0/TCP
    Command:
      /manager
    Liveness:   http-get http://:8081/healthz delay=15s timeout=1s period=20s #success=1 #failure=3
    Readiness:  http-get http://:8081/readyz delay=5s timeout=1s period=10s #success=1 #failure=3
    Environment:
      WATCH_NAMESPACE:           (v1:metadata.namespace)
      K8SSANDRA_CONTROL_PLANE:  true
      SERVICE_ACCOUNT_NAME:      (v1:spec.serviceAccountName)
      OPERATOR_NAMESPACE:        (v1:metadata.namespace)
    Mounts:
      /controller_manager_config.yaml from manager-config (rw,path="controller_manager_config.yaml")
      /tmp/k8s-webhook-server/serving-certs from cert (ro)
  Volumes:
   manager-config:
    Type:      ConfigMap (a volume populated by a ConfigMap)
    Name:      k8ssandra-operator-manager-config
    Optional:  false
   cert:
    Type:        Secret (a volume populated by a Secret)
    SecretName:  k8ssandra-operator-webhook-server-cert
    Optional:    false
Conditions:
  Type           Status  Reason
  ----           ------  ------
  Available      True    MinimumReplicasAvailable
  Progressing    True    NewReplicaSetAvailable
OldReplicaSets:  <none>
NewReplicaSet:   k8ssandra-operator-594dfb764 (1/1 replicas created)
Events:
  Type    Reason             Age   From                   Message
  ----    ------             ----  ----                   -------
  Normal  ScalingReplicaSet  41m   deployment-controller  Scaled up replica set k8ssandra-operator-594dfb764 to 1

• Kubernetes version information:

$ kubectl version
Client Version: v1.29.0
Kustomize Version: v5.0.4-0.20230601165947-6ce0bf390ce3
Server Version: v1.28.2

• Kubernetes cluster kind:
  • managed cluster on Azure (AKS) and DigitalOcean

┆Issue is synchronized with this Jira Story by Unito
┆Issue Number: K8OP-8