How to change a Kubernetes hostpath-provisioner mount path?

Question

With the storage add-on for MicroK8s, Persistent Volume Claims are by default given storage under /var/snap/microk8s/common/default-storage on the host system. How

Answer 1

HostPath

If You want to add your own path to your persistentVolume You can use spec.hostPath.path value

example yamls

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: base                 
provisioner: kubernetes.io/no-provisioner
volumeBindingMode: Immediate

apiVersion: v1
kind: PersistentVolume
metadata:
  name: task-pv-volume
  labels:
    type: local
spec:
  storageClassName: base
  capacity:
    storage: 10Gi
  accessModes:
    - ReadWriteOnce
  hostPath:
    path: "/mnt/data"

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: task-pv-claim
spec:
  storageClassName: base
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 3Gi

kindly reminder

Depending on the installation method, your Kubernetes cluster may be deployed with an existing StorageClass that is marked as default. This default StorageClass is then used to dynamically provision storage for PersistentVolumeClaims that do not require any specific storage class. See PersistentVolumeClaim documentation for details.

You can check your storageclass by using

kubectl get storageclass

If there is no <your-class-name>(default) that means You need to make your own default storage class.

Mark a StorageClass as default:

kubectl patch storageclass <your-class-name> -p '{"metadata": {"annotations":{"storageclass.kubernetes.io/is-default-class":"true"}}}'

After You make defualt storageClass You can use those yamls to create pv and pvc

apiVersion: v1
kind: PersistentVolume
metadata:
  name: task-pv-volume3
  labels:
    type: local
spec:
  storageClassName: ""
  capacity:
    storage: 10Gi
  accessModes:
    - ReadWriteOnce
  hostPath:
    path: "/mnt/data2"

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: task-pv-claim3
spec:
  storageClassName: ""
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 3Gi

one pv for each pvc

Based on kubernetes documentation

Once bound, PersistentVolumeClaim binds are exclusive, regardless of how they were bound. A PVC to PV binding is a one-to-one mapping.