Kubernetes NFS-Client Provisioner

nfs-client is an automatic provisioner that used your already configured NFS server, automatically creating Persistent Volumes. It works very well Google Cloud Filestore, here is a blog post how to use it with GKE.

• Persistent volumes are provisioned as ${namespace}-${pvcName}-${pvName}
• Persistent volumes which are recycled as archieved-${namespace}-${pvcName}-${pvName}

How to deploy nfs-client to your cluster.

To note, you must already have an NFS Server.

1. Editing:

Note: To deploy to an ARM-based environment, use: deploy/deployment-arm.yaml instead, otherwise use deploy/deployment.yaml. Modify deploy/deployment.yaml and change the values to your own NFS server:

          env:
            - name: PROVISIONER_NAME
              value: fuseim.pri/ifs
            - name: NFS_SERVER
              value: 10.10.10.60
            - name: NFS_PATH
              value: /ifs/kubernetes
      volumes:
        - name: nfs-client-root
          nfs:
            server: 10.10.10.60
            path: /ifs/kubernetes

Modify deploy/class.yaml to match the same value indicated by PROVISIONER_NAME:

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: managed-nfs-storage
provisioner: fuseim.pri/ifs # or choose another name, must match deployment's env PROVISIONER_NAME'

2. Authorization

If your cluster has RBAC enabled or you are running OpenShift you must authorize the provisioner. If you are in a namespace/project other than "default" either edit deploy/auth/clusterrolebinding.yaml or edit the oadm policy command accordingly.

Kubernetes:

$ kubectl create -f deploy/auth/serviceaccount.yaml -f deploy/auth/clusterrole.yaml -f deploy/auth/clusterrolebinding.yaml
serviceaccount "nfs-client-provisioner" created
clusterrole "nfs-client-provisioner-runner" created
clusterrolebinding "run-nfs-client-provisioner" created

3. Finally, test your environment!

Now we'll test your NFS provisioner.

Deploy:

$ kubectl create -f deploy/test-claim.yaml -f deploy/test-pod.yaml

Now check your NFS Server for the file SUCCESS.

Delete:

$ kubectl delete -f deploy/test-pod.yaml -f deploy/test-claim.yaml

The PVC folder created on NFS server got deleted.

4. Deploying your own PersistentVolumeClaim

To deploy your own PVC, make sure that you have the correct storage-class as indicated by your deploy/class.yaml file.

For example:

kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: test-claim
  annotations:
    volume.beta.kubernetes.io/storage-class: "managed-nfs-storage"
spec:
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 1Mi