feat: add inline volume support

fix yaml

refine tests

fix example

fix test

.github/workflows/static.yaml

@@ -12,7 +12,7 @@ jobs:
             - name: Run linter
               uses: golangci/golangci-lint-action@v2
               with:
-                  version: v1.29
+                  version: v1.31
                   args: -E=gofmt,deadcode,unused,varcheck,ineffassign,golint,misspell --timeout=30m0s
     verify-helm:
         name: Verify Helm

charts/README.md

@@ -40,6 +40,7 @@ The following table lists the configurable parameters of the latest NFS CSI Driv
 | `driver.name`                                     | alternative driver name                                    | `nfs.csi.k8s.io` |
 | `driver.mountPermissions`                         | mounted folder permissions name                            | `0777`
 | `feature.enableFSGroupPolicy`                     | enable `fsGroupPolicy` on a k8s 1.20+ cluster              | `false`                      |
+| `feature.enableInlineVolume`                      | enable inline volume                     | `true`                      |
 | `image.nfs.repository`                            | csi-driver-nfs image                                       | `mcr.microsoft.com/k8s/csi/nfs-csi`                          |
 | `image.nfs.tag`                                   | csi-driver-nfs image tag                                   | `latest`                                                |
 | `image.nfs.pullPolicy`                            | csi-driver-nfs image pull policy                           | `IfNotPresent`                                                      |

charts/latest/csi-driver-nfs/templates/csi-nfs-driverinfo.yaml

@@ -6,6 +6,9 @@ spec:
   attachRequired: false
   volumeLifecycleModes:
     - Persistent
+  {{- if .Values.feature.enableInlineVolume}}
+    - Ephemeral
+  {{- end}}
   {{- if .Values.feature.enableFSGroupPolicy}}
   fsGroupPolicy: File
   {{- end}}

charts/latest/csi-driver-nfs/values.yaml

@@ -30,6 +30,7 @@ driver:
 
 feature:
   enableFSGroupPolicy: false
+  enableInlineVolume: true
 
 controller:
   name: csi-nfs-controller

deploy/csi-nfs-driverinfo.yaml

@@ -7,3 +7,4 @@ spec:
   attachRequired: false
   volumeLifecycleModes:
     - Persistent
+    - Ephemeral

deploy/example/nginx-pod-inline-volume.yaml

@@ -0,0 +1,25 @@
+---
+kind: Pod
+apiVersion: v1
+metadata:
+  name: nginx-pod-inline-volume
+spec:
+  nodeSelector:
+    "kubernetes.io/os": linux
+  containers:
+    - image: mcr.microsoft.com/oss/nginx/nginx:1.19.5
+      name: nginx-nfs
+      command:
+        - "/bin/bash"
+        - "-c"
+        - set -euo pipefail; while true; do echo $(date) >> /mnt/nfs/outfile; sleep 1; done
+      volumeMounts:
+        - name: persistent-storage
+          mountPath: "/mnt/nfs"
+  volumes:
+    - name: persistent-storage
+      csi:
+        driver: nfs.csi.k8s.io
+        volumeAttributes:
+          server: nfs-server.default.svc.cluster.local  # required
+          share: /  # required

hack/verify-examples.sh

@@ -20,7 +20,7 @@ rollout_and_wait() {
     trap "echo \"Failed to apply config \\\"$1\\\"\" >&2" err
 
     APPNAME=$(kubectl apply -f $1 | grep -E "^(:?daemonset|deployment|statefulset|pod)" | awk '{printf $1}')
-    if [[ -n $(expr "${APPNAME}" : "\(daemonset\|deployment\|statefulset\)" || true) ]]; then
+    if [[ -n $(expr "${APPNAME}" : "\(daemonset\|deployment\|statefulset\|pod\)" || true) ]]; then
         kubectl rollout status $APPNAME --watch --timeout=5m
     else
         kubectl wait "${APPNAME}" --for condition=ready --timeout=5m

test/e2e/dynamic_provisioning_test.go

@@ -257,6 +257,32 @@ var _ = ginkgo.Describe("Dynamic Provisioning", func() {
 		}
 		test.Run(cs, ns)
 	})
+
+	ginkgo.It("should create a CSI inline volume [nfs.csi.k8s.io]", func() {
+		pods := []testsuites.PodDetails{
+			{
+				Cmd: convertToPowershellCommandIfNecessary("echo 'hello world' > /mnt/test-1/data && grep 'hello world' /mnt/test-1/data"),
+				Volumes: []testsuites.VolumeDetails{
+					{
+						ClaimSize: "10Gi",
+						VolumeMount: testsuites.VolumeMountDetails{
+							NameGenerate:      "test-volume-",
+							MountPathGenerate: "/mnt/test-",
+						},
+					},
+				},
+			},
+		}
+
+		test := testsuites.DynamicallyProvisionedInlineVolumeTest{
+			CSIDriver: testDriver,
+			Pods:      pods,
+			Server:    nfsServerAddress,
+			Share:     nfsShare,
+			ReadOnly:  false,
+		}
+		test.Run(cs, ns)
+	})
 })
 
 func restClient(group string, version string) (restclientset.Interface, error) {

test/e2e/e2e_suite_test.go

@@ -37,6 +37,8 @@ import (
 const (
 	kubeconfigEnvVar  = "KUBECONFIG"
 	testWindowsEnvVar = "TEST_WINDOWS"
+	nfsServerAddress  = "nfs-server.default.svc.cluster.local"
+	nfsShare          = "/"
 )
 
 var (
@@ -44,8 +46,8 @@ var (
 	nfsDriver                     *nfs.Driver
 	isWindowsCluster              = os.Getenv(testWindowsEnvVar) != ""
 	defaultStorageClassParameters = map[string]string{
-		"server": "nfs-server.default.svc.cluster.local",
-		"share":  "/",
+		"server": nfsServerAddress,
+		"share":  nfsShare,
 		"csi.storage.k8s.io/provisioner-secret-name":      "mount-options",
 		"csi.storage.k8s.io/provisioner-secret-namespace": "default",
 	}

test/e2e/testsuites/dynamically_provisioned_inline_volume.go

@@ -0,0 +1,53 @@
+/*
+Copyright 2022 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package testsuites
+
+import (
+	"github.com/kubernetes-csi/csi-driver-nfs/test/e2e/driver"
+	"github.com/onsi/ginkgo"
+	v1 "k8s.io/api/core/v1"
+	clientset "k8s.io/client-go/kubernetes"
+)
+
+// DynamicallyProvisionedInlineVolumeTest will provision required server, share
+// Waiting for the PV provisioner to create an inline volume
+// Testing if the Pod(s) Cmd is run with a 0 exit code
+type DynamicallyProvisionedInlineVolumeTest struct {
+	CSIDriver driver.DynamicPVTestDriver
+	Pods      []PodDetails
+	Server    string
+	Share     string
+	ReadOnly  bool
+}
+
+func (t *DynamicallyProvisionedInlineVolumeTest) Run(client clientset.Interface, namespace *v1.Namespace) {
+	for _, pod := range t.Pods {
+		var tpod *TestPod
+		var cleanup []func()
+		tpod, cleanup = pod.SetupWithCSIInlineVolumes(client, namespace, t.CSIDriver, t.Server, t.Share, t.ReadOnly)
+		// defer must be called here for resources not get removed before using them
+		for i := range cleanup {
+			defer cleanup[i]()
+		}
+
+		ginkgo.By("deploying the pod")
+		tpod.Create()
+		defer tpod.Cleanup()
+		ginkgo.By("checking that the pods command exits with no error")
+		tpod.WaitForSuccess()
+	}
+}

test/e2e/testsuites/specs.go

@@ -123,6 +123,15 @@ func (pod *PodDetails) SetupWithDynamicVolumes(client clientset.Interface, names
 	return tpod, cleanupFuncs
 }
 
+func (pod *PodDetails) SetupWithCSIInlineVolumes(client clientset.Interface, namespace *v1.Namespace, csiDriver driver.DynamicPVTestDriver, server, share string, readOnly bool) (*TestPod, []func()) {
+	tpod := NewTestPod(client, namespace, pod.Cmd)
+	cleanupFuncs := make([]func(), 0)
+	for n, v := range pod.Volumes {
+		tpod.SetupCSIInlineVolume(fmt.Sprintf("%s%d", v.VolumeMount.NameGenerate, n+1), fmt.Sprintf("%s%d", v.VolumeMount.MountPathGenerate, n+1), server, share, readOnly)
+	}
+	return tpod, cleanupFuncs
+}
+
 func (pod *PodDetails) SetupDeployment(client clientset.Interface, namespace *v1.Namespace, csiDriver driver.DynamicPVTestDriver, storageClassParameters map[string]string) (*TestDeployment, []func()) {
 	cleanupFuncs := make([]func(), 0)
 	volume := pod.Volumes[0]

test/e2e/testsuites/testsuites.go

@@ -595,3 +595,27 @@ func (t *TestPod) SetupVolumeMountWithSubpath(pvc *v1.PersistentVolumeClaim, nam
 
 	t.pod.Spec.Volumes = append(t.pod.Spec.Volumes, volume)
 }
+
+func (t *TestPod) SetupCSIInlineVolume(name, mountPath, server, share string, readOnly bool) {
+	volumeMount := v1.VolumeMount{
+		Name:      name,
+		MountPath: mountPath,
+		ReadOnly:  readOnly,
+	}
+	t.pod.Spec.Containers[0].VolumeMounts = append(t.pod.Spec.Containers[0].VolumeMounts, volumeMount)
+
+	volume := v1.Volume{
+		Name: name,
+		VolumeSource: v1.VolumeSource{
+			CSI: &v1.CSIVolumeSource{
+				Driver: nfs.DefaultDriverName,
+				VolumeAttributes: map[string]string{
+					"server": server,
+					"share":  share,
+				},
+				ReadOnly: &readOnly,
+			},
+		},
+	}
+	t.pod.Spec.Volumes = append(t.pod.Spec.Volumes, volume)
+}