Modify GCI mounter to enable NFSv3

This PR is a retry for PR #36610

test/e2e/common/volumes.go

@@ -393,6 +393,40 @@ var _ = framework.KubeDescribe("GCP Volumes", func() {
 		})
 	})
 
+	////////////////////////////////////////////////////////////////////////
+	// NFSv3
+	////////////////////////////////////////////////////////////////////////
+
+	framework.KubeDescribe("NFSv3", func() {
+		It("should be mountable for NFSv3", func() {
+			config := VolumeTestConfig{
+				namespace:   namespace.Name,
+				prefix:      "nfs",
+				serverImage: "gcr.io/google_containers/volume-nfs:0.8",
+				serverPorts: []int{2049, 20048},
+			}
+
+			defer func() {
+				if clean {
+					volumeTestCleanup(f, config)
+				}
+			}()
+			pod := startVolumeServer(f, config)
+			serverIP := pod.Status.PodIP
+			framework.Logf("NFS server IP address: %v", serverIP)
+
+			volume := v1.VolumeSource{
+				NFS: &v1.NFSVolumeSource{
+					Server:   serverIP,
+					Path:     "/exports",
+					ReadOnly: true,
+				},
+			}
+			// Must match content of test/images/volumes-tester/nfs/index.html
+			testVolumeClient(f, config, volume, nil, "Hello from NFS!")
+		})
+	})
+
 	////////////////////////////////////////////////////////////////////////
 	// Gluster
 	////////////////////////////////////////////////////////////////////////

test/e2e_node/jenkins/gci-init.yaml

@@ -8,5 +8,5 @@ runcmd:
   - mount -B -o remount,exec /home/kubernetes/bin 
   - wget https://storage.googleapis.com/kubernetes-release/rkt/v1.18.0/rkt -O /home/kubernetes/bin/rkt
   - wget https://storage.googleapis.com/kubernetes-release/rkt/v1.18.0/stage1-fly.aci -O /home/kubernetes/bin/stage1-fly.aci
-  - wget https://storage.googleapis.com/kubernetes-release/gci-mounter/gci-mounter-v2.aci -O /home/kubernetes/bin/gci-mounter-v2.aci
+  - wget https://storage.googleapis.com/kubernetes-release/gci-mounter/gci-mounter-v3.aci -O /home/kubernetes/bin/gci-mounter-v3.aci
   - chmod a+x /home/kubernetes/bin/rkt