minikube: StorageClass reclaimPolicy is being ignored

I created the following storage class called ‘standard-persist’ (using the ‘standard’ storage class as a template):

---
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  annotations:
    storageclass.beta.kubernetes.io/is-default-class: "false"
  labels:
    addonmanager.kubernetes.io/mode: EnsureExists
  name: standard-persist
provisioner: k8s.io/minikube-hostpath
reclaimPolicy: Retain
volumeBindingMode: Immediate

I then applied the following PVC:

---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: pvc-db-data-storage
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi
  storageClassName: standard-persist

This ended up creating:

$ kubectl get pvc
NAME                  STATUS   VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS       AGE
pvc-db-data-storage   Bound    pvc-5a3887c3-4efc-11e9-8cda-0800271f16b7   1Gi        RWO            standard-persist   7s


$ kubectl get pv
NAME                                       CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS   CLAIM                         STORAGECLASS       REASON   AGE
pvc-5a3887c3-4efc-11e9-8cda-0800271f16b7   1Gi        RWO            Delete           Bound    default/pvc-db-data-storage   standard-persist            9s

As you can see the Reclaim Policy still shows as ‘Delete’ even though it should be ‘Retain’.

I can however workaround this problem by manually changing the Reclaim Policy of a PersistentVolume

My environment setup:

$ minikube version
minikube version: v0.35.0

$ kubectl version
Client Version: version.Info{Major:"1", Minor:"13", GitVersion:"v1.13.4", GitCommit:"c27b913fddd1a6c480c229191a087698aa92f0b1", GitTreeState:"clean", BuildDate:"2019-03-01T23:34:27Z", GoVersion:"go1.12", Compiler:"gc", Platform:"darwin/amd64"}
Server Version: version.Info{Major:"1", Minor:"13", GitVersion:"v1.13.4", GitCommit:"c27b913fddd1a6c480c229191a087698aa92f0b1", GitTreeState:"clean", BuildDate:"2019-02-28T13:30:26Z", GoVersion:"go1.11.5", Compiler:"gc", Platform:"linux/amd64"}

About this issue

Original URL
State: closed
Created 5 years ago
Reactions: 4
Comments: 17 (6 by maintainers)

Most upvoted comments

/reopen

nhannamsiu on May 28, 2020

/reopen

Seems we are still hitting this issue.

$ kubectl version
Client Version: version.Info{Major:"1", Minor:"17", GitVersion:"v1.17.3+k3s1", GitCommit:"5b17a175ce333dfb98cb8391afeb1f34219d9275", GitTreeState:"clean", BuildDate:"2020-02-27T07:28:53Z", GoVersion:"go1.13.8", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"17", GitVersion:"v1.17.3+k3s1", GitCommit:"5b17a175ce333dfb98cb8391afeb1f34219d9275", GitTreeState:"clean", BuildDate:"2020-02-27T07:28:53Z", GoVersion:"go1.13.8", Compiler:"gc", Platform:"linux/amd64"

apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: postgres
  namespace: mynamespace
  labels:
    app.kubernetes.io/name: postgres
spec:
  selector:
    matchLabels:
      app: postgres
  serviceName: postgres
  replicas: 1
  template:
    metadata:
      labels:
        app: postgres
    spec:
      terminationGracePeriodSeconds: 10
      containers:
      - name: postgres
        image: postgres:latest
        ports:
        - containerPort: 5432
          name: postgres
        volumeMounts:
          - mountPath: /var/lib/postgresql/data
            name: postgres
  volumeClaimTemplates:
  - metadata:
      name: postgres
      labels:
        app.kubernetes.io/name: postgres
    spec:
      accessModes:
        - ReadWriteOnce
      persistentVolumeReclaimPolicy: Retain
      storageClassName: local-path
      resources:
        requests:
          storage: 10Gi

$ kubectl get pv
NAME                                       CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS   CLAIM                               STORAGECLASS   REASON   AGE
pvc-75320162-1685-463b-b092-6bc6b369e9c9   10Gi       RWO            Delete           Bound    mynamespace/postgres-postgres-0     local-path              18m

vvanouytsel on May 11, 2020

Thank you for filing this!

This seems like a bug in @r2d4’s external-storage
https://github.com/kubernetes/minikube/blob/master/vendor/github.com/r2d4/external-storage/lib/controller/controller.go#L779.

balopat on Apr 4, 2019