Kubernetes: how to do dynamic PersistentVolumeClaim with persistentVolumeReclaimPolicy: Reclaim

Question

I have dynamic PersistentVolume provisioning using PersistentVolumeClaim.

I would like to keep the PV after the pod is done. So I would like to have what persistentVolumeReclaimPolicy: Reclaim does.

However, that is applicable to PersistentVolume, not PersistentVolumeClaim (AFAIK).

How can I change this behavior for dynamically provisioned PV's?

kind: PersistentVolumeClaim
apiVersion: v1
metadata:
    name: {{ .Release.Name }}-pvc
spec:
    accessModes:
      - ReadWriteOnce
    storageClassName: gp2
    resources:
        requests:
            storage: 6Gi

---
kind: Pod
apiVersion: v1
metadata:
    name: "{{ .Release.Name }}-gatling-test"
spec:
    restartPolicy: Never
    containers:
      - name: {{ .Release.Name }}-gatling-test
        image: ".../services-api-mvn-builder:latest"
        command: ["sh", "-c", 'mvn -B gatling:test -pl csa-testing -DCSA_SERVER={{ template "project.fullname" . }} -DCSA_PORT={{ .Values.service.appPort }}']
        volumeMounts:
          - name: "{{ .Release.Name }}-test-res"
            mountPath: "/tmp/testResults"

    volumes:
      - name: "{{ .Release.Name }}-test-res"
        persistentVolumeClaim:
          claimName: "{{ .Release.Name }}-pvc"
          #persistentVolumeReclaimPolicy: Retain  ???

Answer 1

you can config it in pv.yaml or storageclass.yaml or take a patch to exit pv

pv.yaml

apiVersion: v1
kind: PersistentVolume
metadata:
  name: pv0003
spec:
  capacity:
    storage: 5Gi
  volumeMode: Filesystem
  accessModes:
    - ReadWriteOnce
  persistentVolumeReclaimPolicy: Recycle
  storageClassName: slow
  mountOptions:
    - hard
    - nfsvers=4.1
  nfs:
    path: /tmp
    server: 172.17.0.2

storageclass.yaml

kind: StorageClass
apiVersion: storage.k8s.io/v1
metadata:
  name: gp2-retain
  annotations:
provisioner: kubernetes.io/aws-ebs
parameters:
  type: gp2
  fsType: ext4 
reclaimPolicy: Retain

take a patch

kubectl patch pv <your-pv-name> -p '{"spec":{"persistentVolumeReclaimPolicy":"Retain"}}'