doc: update NFS provisioner example

fix comments

fix comments

deploy/kubernetes/csi-nfs-node.yaml

@@ -14,6 +14,8 @@ spec:
       labels:
         app: csi-nfs-node
     spec:
+      hostNetwork: true # original nfs connection would be broken without hostNetwork setting
+      dnsPolicy: ClusterFirstWithHostNet
       containers:
         - name: node-driver-registrar
           image: quay.io/k8scsi/csi-node-driver-registrar:v1.0.2

examples/kubernetes/nfs-provisioner/nfs-server.yaml

@@ -1,39 +0,0 @@
-kind: Service
-apiVersion: v1
-metadata:
-  name: nfs-service
-spec:
-  clusterIP: 10.0.171.239
-  selector:
-    role: nfs
-  ports:
-    - name: tcp-2049
-      port: 2049
-      protocol: TCP
-    - name: udp-111
-      port: 111
-      protocol: UDP
-
----
-kind: Pod
-apiVersion: v1
-metadata:
-  name: nfs-server-pod
-  labels:
-    role: nfs
-spec:
-  containers:
-    - name: nfs-server-container
-      image: itsthenetwork/nfs-server-alpine:latest
-      env:
-      - name: SHARED_DIRECTORY
-        value: "/exports"
-      volumeMounts:
-        - mountPath: /exports
-          name: nfs-vol
-      securityContext:
-        privileged: true
-  volumes:
-    - name: nfs-vol
-      emptyDir: {}
----

examples/kubernetes/nfs-server/README.md

@@ -8,11 +8,7 @@
 kubectl create -f https://raw.githubusercontent.com/kubernetes-csi/csi-driver-nfs/master/examples/kubernetes/nfs-provisioner/nfs-server.yaml
 ```
 
-- After deploying, a new service `nfs-service` is created. The file share path is accessible at  `10.0.171.239`. Verify if the NFS Server pod is running
-
-```bash
-$ kubectl get po nfs-server-pod
-```
+- After deploying, a new service `nfs-server` is created, nfs share path is`nfs-server.default.svc.cluster.local:/`.
 
 - To check if the server is working, we can statically create a `PersistentVolume` and a `PersistentVolumeClaim`, and mount it onto a sample pod:
 
@@ -23,6 +19,12 @@ kubectl create -f https://raw.githubusercontent.com/kubernetes-csi/csi-driver-nf
 Verify if the newly create deployment is Running:
 
 ```bash
-$ kubectl get deploy nfs-busybox
+# kubectl exec -it nfs-busybox-8cd8d9c5b-sf8mx sh
+/ # df -h
+Filesystem                Size      Used Available Use% Mounted on
+...
+nfs-server.default.svc.cluster.local:/
+                        123.9G     15.2G    108.6G  12% /mnt
+...
 ```
 

examples/kubernetes/nfs-server/deployment.yaml

@@ -12,9 +12,13 @@ spec:
   mountOptions:
     - hard
     - nfsvers=4.1
-  nfs:
-    path: /
-    server: 10.0.171.239
+  csi:
+    driver: nfs.csi.k8s.io
+    readOnly: false
+    volumeHandle: unique-volumeid  # make sure it's a unique id in the cluster
+    volumeAttributes:
+      server: nfs-server.default.svc.cluster.local
+      share: /
 ---
 kind: PersistentVolumeClaim
 apiVersion: v1
@@ -25,7 +29,7 @@ spec:
     - ReadWriteMany
   resources:
     requests:
-      storage: 2Gi
+      storage: 10Gi
   volumeName: pv-nfs
   storageClassName: ""
 ---

examples/kubernetes/nfs-server/nfs-server.yaml

@@ -0,0 +1,59 @@
+---
+kind: Service
+apiVersion: v1
+metadata:
+  name: nfs-server
+  labels:
+    app: nfs-server
+spec:
+  type: ClusterIP  # use "LoadBalancer" to get a public ip
+  selector:
+    app: nfs-server
+  ports:
+    - name: tcp-2049
+      port: 2049
+      protocol: TCP
+    - name: udp-111
+      port: 111
+      protocol: UDP
+---
+kind: Deployment
+apiVersion: apps/v1
+metadata:
+  name: nfs-server
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: nfs-server
+  template:
+    metadata:
+      name: nfs-server
+      labels:
+        app: nfs-server
+    spec:
+      nodeSelector:
+        "kubernetes.io/os": linux
+      containers:
+        - name: nfs-server
+          image: itsthenetwork/nfs-server-alpine:latest
+          env:
+            - name: SHARED_DIRECTORY
+              value: "/exports"
+          volumeMounts:
+            - mountPath: /exports
+              name: nfs-vol
+          securityContext:
+            privileged: true
+          ports:
+            - name: tcp-2049
+              containerPort: 2049
+              protocol: TCP
+            - name: udp-111
+              containerPort: 111
+              protocol: UDP
+      volumes:
+        - name: nfs-vol
+          hostPath:
+            path: /nfs-vol  # modify this to specify another path to store nfs share data
+            type: DirectoryOrCreate