Pass pod metadata to flex plugin

pkg/volume/flexvolume/driver-call.go

@@ -51,6 +51,12 @@ const (
 	optionKeySecret = "kubernetes.io/secret"
 	optionFSGroup   = "kubernetes.io/fsGroup"
 	optionMountsDir = "kubernetes.io/mountsDir"
+
+	optionKeyPodName      = "kubernetes.io/pod.name"
+	optionKeyPodNamespace = "kubernetes.io/pod.namespace"
+	optionKeyPodUID       = "kubernetes.io/pod.uid"
+
+	optionKeyServiceAccountName = "kubernetes.io/serviceAccount.name"
 )
 
 const (

pkg/volume/flexvolume/mounter.go

@@ -66,6 +66,13 @@ func (f *flexVolumeMounter) SetUpAt(dir string, fsGroup *types.UnixGroupID) erro
 
 	extraOptions := make(map[string]string)
 
+	// pod metadata
+	extraOptions[optionKeyPodName] = f.podName
+	extraOptions[optionKeyPodNamespace] = f.podNamespace
+	extraOptions[optionKeyPodUID] = string(f.podUID)
+	// service account metadata
+	extraOptions[optionKeyServiceAccountName] = f.podServiceAccountName
+
 	// Extract secret and pass it as options.
 	if err := addSecretsToOptions(extraOptions, f.spec, f.podNamespace, f.driverName, f.plugin.host); err != nil {
 		return err

pkg/volume/flexvolume/mounter_test.go

@@ -19,6 +19,7 @@ package flexvolume
 import (
 	"testing"
 
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/types"
 	"k8s.io/kubernetes/pkg/api/v1"
 	"k8s.io/kubernetes/pkg/util/mount"
@@ -26,7 +27,16 @@ import (
 
 func TestSetUpAt(t *testing.T) {
 	spec := fakeVolumeSpec()
-	pod := &v1.Pod{}
+	pod := &v1.Pod{
+		ObjectMeta: metav1.ObjectMeta{
+			Name:      "my-pod",
+			Namespace: "my-ns",
+			UID:       types.UID("my-uid"),
+		},
+		Spec: v1.PodSpec{
+			ServiceAccountName: "my-sa",
+		},
+	}
 	mounter := &mount.FakeMounter{}
 
 	plugin, rootDir := testPlugin()
@@ -34,12 +44,21 @@ func TestSetUpAt(t *testing.T) {
 	plugin.runner = fakeRunner(
 		// first call without fsGroup
 		assertDriverCall(t, successOutput(), mountCmd, rootDir+"/mount-dir",
-			specJson(plugin, spec, nil)),
+			specJson(plugin, spec, map[string]string{
+				optionKeyPodName:            "my-pod",
+				optionKeyPodNamespace:       "my-ns",
+				optionKeyPodUID:             "my-uid",
+				optionKeyServiceAccountName: "my-sa",
+			})),
 
 		// second test has fsGroup
 		assertDriverCall(t, notSupportedOutput(), mountCmd, rootDir+"/mount-dir",
 			specJson(plugin, spec, map[string]string{
-				optionFSGroup: "42",
+				optionFSGroup:               "42",
+				optionKeyPodName:            "my-pod",
+				optionKeyPodNamespace:       "my-ns",
+				optionKeyPodUID:             "my-uid",
+				optionKeyServiceAccountName: "my-sa",
 			})),
 		assertDriverCall(t, fakeVolumeNameOutput("sdx"), getVolumeNameCmd,
 			specJson(plugin, spec, nil)),

pkg/volume/flexvolume/plugin.go

@@ -108,13 +108,15 @@ func (plugin *flexVolumePlugin) newMounterInternal(spec *volume.Spec, pod *api.P
 	source, readOnly := getVolumeSource(spec)
 	return &flexVolumeMounter{
 		flexVolume: &flexVolume{
-			driverName:   source.Driver,
+			driverName:            source.Driver,
-			execPath:     plugin.getExecutable(),
+			execPath:              plugin.getExecutable(),
-			mounter:      mounter,
+			mounter:               mounter,
-			plugin:       plugin,
+			plugin:                plugin,
-			podUID:       pod.UID,
+			podName:               pod.Name,
-			podNamespace: pod.Namespace,
+			podUID:                pod.UID,
-			volName:      spec.Name(),
+			podNamespace:          pod.Namespace,
+			podServiceAccountName: pod.Spec.ServiceAccountName,
+			volName:               spec.Name(),
 		},
 		runner:             runner,
 		spec:               spec,

pkg/volume/flexvolume/volume.go

@@ -30,10 +30,14 @@ type flexVolume struct {
 	// mounter provides the interface that is used to mount the actual
 	// block device.
 	mounter mount.Interface
+	// podName is the name of the pod, if available.
+	podName string
 	// podUID is the UID of the pod.
 	podUID types.UID
-	// podNamespace is the namespace of the pod.
+	// podNamespace is the namespace of the pod, if available.
 	podNamespace string
+	// podServiceAccountName is the service account name of the pod, if available.
+	podServiceAccountName string
 	// volName is the name of the pod's volume.
 	volName string
 	// the underlying plugin