Kubernetes Helm PVC

Question

I have a yml file where I create a pvc on my provider (digital ocean)

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: test-pvc
  namespace: test
spec:
  accessModes:
  - ReadWriteOnce
  resources:
    requests:
      storage: 10Gi
  storageClassName: do-block-storage

I am also using a helm chart and want to be able to point to the already created pvc How can I do this? This helm chart is deployed after the PVC is already created/deployed

  master:
    persistence:
      enabled: true
      ## mariadb data Persistent Volume Storage Class
      ## If defined, storageClassName: <storageClass>
      ## If set to "-", storageClassName: "", which disables dynamic provisioning
      ## If undefined (the default) or set to null, no storageClassName spec is
      ##   set, choosing the default provisioner.  (gp2 on AWS, standard on
      ##   GKE, AWS & OpenStack)
      ##
      # storageClass: "-"
      accessMode: ReadWriteOnce
      size: 10Gi

Answer 1

To mount your PVC in your helm chart, do this:

• Disable persistence volume creation in helm chart

master:
    persistence:
      enabled: false #Setting it to false

• Modify your deployment yaml, its located in templates folder of your helm chart. Point your Pod to mount your own PVC.

Something like this:

apiVersion: v1
kind: Pod
metadata:
  name: task-pv-pod
spec:
  volumes:
    - name: task-pv-storage
      persistentVolumeClaim:
        claimName: test-pvc  # pointing to existing test-pvc
  containers:
    - name: task-pv-container
      image: nginx
      ports:
        - containerPort: 80
          name: "http-server"
      volumeMounts:
        - mountPath: "/usr/share/nginx/html"
          name: task-pv-storage

Update:

Specifically in your case, you can specify your pvc name against existingClaim parameter in values.yaml, it will be picked up by your deployment.