Add secret volume plugin and e2e test

pkg/api/types.go

@@ -230,7 +230,10 @@ type GitRepo struct {
 	// TODO: Consider credentials here.
 }
 
-// Adapts a Secret into a VolumeSource
+// Adapts a Secret into a VolumeSource.
+//
+// The contents of the target Secret's Data field will be presented in a volume
+// as files using the keys in the Data field as the file names.
 type SecretSource struct {
 	// Reference to a Secret
 	Target ObjectReference `json:"target"`
@@ -1318,15 +1321,22 @@ type ResourceQuotaList struct {
 	Items []ResourceQuota `json:"items"`
 }
 
-// Secret holds secret data of a certain type
+// Secret holds secret data of a certain type.  The total bytes of the values in
+// the Data field must be less than MaxSecretSize bytes.
 type Secret struct {
 	TypeMeta   `json:",inline"`
 	ObjectMeta `json:"metadata,omitempty"`
 
+	// Data contains the secret data.  Each key must be a valid DNS_SUBDOMAIN.
+	// The serialized form of the secret data is a base64 encoded string.
 	Data map[string][]byte `json:"data,omitempty"`
-	Type SecretType        `json:"type,omitempty"`
+
+	// Used to facilitate programatic handling of secret data.
+	Type SecretType `json:"type,omitempty"`
 }
 
+const MaxSecretSize = 1 * 1024 * 1024
+
 type SecretType string
 
 const (
@@ -1339,5 +1349,3 @@ type SecretList struct {
 
 	Items []Secret `json:"items"`
 }
-
-const MaxSecretSize = 1 * 1024 * 1024

pkg/api/v1beta1/types.go

@@ -1100,13 +1100,21 @@ type ResourceQuotaList struct {
 	Items []ResourceQuota `json:"items"`
 }
 
+// Secret holds secret data of a certain type.  The total bytes of the values in
+// the Data field must be less than MaxSecretSize bytes.
 type Secret struct {
 	TypeMeta `json:",inline"`
 
+	// Data contains the secret data.  Each key must be a valid DNS_SUBDOMAIN.
+	// The serialized form of the secret data is a base64 encoded string.
 	Data map[string][]byte `json:"data,omitempty"`
-	Type SecretType        `json:"type,omitempty"`
+
+	// Used to facilitate programatic handling of secret data.
+	Type SecretType `json:"type,omitempty"`
 }
 
+const MaxSecretSize = 1 * 1024 * 1024
+
 type SecretType string
 
 const (

pkg/api/v1beta2/types.go

@@ -1103,14 +1103,21 @@ type ResourceQuotaList struct {
 	Items []ResourceQuota `json:"items"`
 }
 
-// Secret holds secret data of a certain type
+// Secret holds secret data of a certain type.  The total bytes of the values in
+// the Data field must be less than MaxSecretSize bytes.
 type Secret struct {
 	TypeMeta `json:",inline"`
 
+	// Data contains the secret data.  Each key must be a valid DNS_SUBDOMAIN.
 	Data map[string][]byte `json:"data,omitempty"`
-	Type SecretType        `json:"type,omitempty"`
+
+	// Used to facilitate programatic handling of secret data.
+	// The serialized form of the secret data is a base64 encoded string.
+	Type SecretType `json:"type,omitempty"`
 }
 
+const MaxSecretSize = 1 * 1024 * 1024
+
 type SecretType string
 
 const (

pkg/api/v1beta3/types.go

@@ -1243,16 +1243,22 @@ type ResourceQuotaList struct {
 	Items []ResourceQuota `json:"items"`
 }
 
-// Secret holds mappings between paths and secret data
-// TODO: shouldn't "Secret" be a plural?
+// Secret holds secret data of a certain type.  The total bytes of the values in
+// the Data field must be less than MaxSecretSize bytes.
 type Secret struct {
 	TypeMeta   `json:",inline"`
 	ObjectMeta `json:"metadata,omitempty"`
 
+	// Data contains the secret data.  Each key must be a valid DNS_SUBDOMAIN.
+	// The serialized form of the secret data is a base64 encoded string.
 	Data map[string][]byte `json:"data,omitempty"`
-	Type SecretType        `json:"type,omitempty"`
+
+	// Used to facilitate programatic handling of secret data.
+	Type SecretType `json:"type,omitempty"`
 }
 
+const MaxSecretSize = 1 * 1024 * 1024
+
 type SecretType string
 
 const (

pkg/api/validation/validation.go

@@ -853,9 +853,14 @@ func ValidateSecret(secret *api.Secret) errs.ValidationErrorList {
 	}
 
 	totalSize := 0
-	for _, value := range secret.Data {
+	for key, value := range secret.Data {
+		if !util.IsDNSSubdomain(key) {
+			allErrs = append(allErrs, errs.NewFieldInvalid(fmt.Sprintf("data[%v]", key), key, cIdentifierErrorMsg))
+		}
+
 		totalSize += len(value)
 	}
+
 	if totalSize > api.MaxSecretSize {
 		allErrs = append(allErrs, errs.NewFieldForbidden("data", "Maximum secret size exceeded"))
 	}

pkg/api/validation/validation_test.go

@@ -2497,7 +2497,7 @@ func TestValidateSecret(t *testing.T) {
 		return api.Secret{
 			ObjectMeta: api.ObjectMeta{Name: "foo", Namespace: "bar"},
 			Data: map[string][]byte{
-				"foo": []byte("bar"),
+				"data-1": []byte("bar"),
 			},
 		}
 	}
@@ -2508,6 +2508,7 @@ func TestValidateSecret(t *testing.T) {
 		emptyNs     = validSecret()
 		invalidNs   = validSecret()
 		overMaxSize = validSecret()
+		invalidKey  = validSecret()
 	)
 
 	emptyName.Name = ""
@@ -2517,6 +2518,7 @@ func TestValidateSecret(t *testing.T) {
 	overMaxSize.Data = map[string][]byte{
 		"over": make([]byte, api.MaxSecretSize+1),
 	}
+	invalidKey.Data["a..b"] = []byte("whoops")
 
 	tests := map[string]struct {
 		secret api.Secret
@@ -2528,6 +2530,7 @@ func TestValidateSecret(t *testing.T) {
 		"empty namespace":   {emptyNs, false},
 		"invalid namespace": {invalidNs, false},
 		"over max size":     {overMaxSize, false},
+		"invalid key":       {invalidKey, false},
 	}
 
 	for name, tc := range tests {

pkg/kubelet/server/plugins.go

@@ -26,6 +26,7 @@ import (
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/kubelet/volume/gce_pd"
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/kubelet/volume/git_repo"
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/kubelet/volume/host_path"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/kubelet/volume/secret"
 )
 
 // ProbeVolumePlugins collects all volume plugins into an easy to use list.
@@ -39,6 +40,7 @@ func ProbeVolumePlugins() []volume.Plugin {
 	allPlugins = append(allPlugins, gce_pd.ProbeVolumePlugins()...)
 	allPlugins = append(allPlugins, git_repo.ProbeVolumePlugins()...)
 	allPlugins = append(allPlugins, host_path.ProbeVolumePlugins()...)
+	allPlugins = append(allPlugins, secret.ProbeVolumePlugins()...)
 
 	return allPlugins
 }

pkg/kubelet/server/server.go

@@ -179,6 +179,8 @@ func (s *KubeletServer) Run(_ []string) error {
 		glog.Warningf("No API client: %v", err)
 	}
 
+	glog.Infof("Using root directory: %v", s.RootDirectory)
+
 	credentialprovider.SetPreferredDockercfgPath(s.RootDirectory)
 
 	kcfg := KubeletConfig{

pkg/kubelet/volume/empty_dir/empty_dir_test.go

@@ -27,7 +27,7 @@ import (
 
 func TestCanSupport(t *testing.T) {
 	plugMgr := volume.PluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), &volume.FakeHost{"/tmp/fake"})
+	plugMgr.InitPlugins(ProbeVolumePlugins(), &volume.FakeHost{"/tmp/fake", nil})
 
 	plug, err := plugMgr.FindPluginByName("kubernetes.io/empty-dir")
 	if err != nil {
@@ -46,7 +46,7 @@ func TestCanSupport(t *testing.T) {
 
 func TestPlugin(t *testing.T) {
 	plugMgr := volume.PluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), &volume.FakeHost{"/tmp/fake"})
+	plugMgr.InitPlugins(ProbeVolumePlugins(), &volume.FakeHost{"/tmp/fake", nil})
 
 	plug, err := plugMgr.FindPluginByName("kubernetes.io/empty-dir")
 	if err != nil {
@@ -100,7 +100,7 @@ func TestPlugin(t *testing.T) {
 
 func TestPluginBackCompat(t *testing.T) {
 	plugMgr := volume.PluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), &volume.FakeHost{"/tmp/fake"})
+	plugMgr.InitPlugins(ProbeVolumePlugins(), &volume.FakeHost{"/tmp/fake", nil})
 
 	plug, err := plugMgr.FindPluginByName("kubernetes.io/empty-dir")
 	if err != nil {
@@ -125,7 +125,7 @@ func TestPluginBackCompat(t *testing.T) {
 
 func TestPluginLegacy(t *testing.T) {
 	plugMgr := volume.PluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), &volume.FakeHost{"/tmp/fake"})
+	plugMgr.InitPlugins(ProbeVolumePlugins(), &volume.FakeHost{"/tmp/fake", nil})
 
 	plug, err := plugMgr.FindPluginByName("empty")
 	if err != nil {

pkg/kubelet/volume/gce_pd/gce_pd_test.go

@@ -28,7 +28,7 @@ import (
 
 func TestCanSupport(t *testing.T) {
 	plugMgr := volume.PluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), &volume.FakeHost{"/tmp/fake"})
+	plugMgr.InitPlugins(ProbeVolumePlugins(), &volume.FakeHost{"/tmp/fake", nil})
 
 	plug, err := plugMgr.FindPluginByName("kubernetes.io/gce-pd")
 	if err != nil {
@@ -80,7 +80,7 @@ func (fake *fakeMounter) List() ([]mount.MountPoint, error) {
 
 func TestPlugin(t *testing.T) {
 	plugMgr := volume.PluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), &volume.FakeHost{"/tmp/fake"})
+	plugMgr.InitPlugins(ProbeVolumePlugins(), &volume.FakeHost{"/tmp/fake", nil})
 
 	plug, err := plugMgr.FindPluginByName("kubernetes.io/gce-pd")
 	if err != nil {
@@ -146,7 +146,7 @@ func TestPlugin(t *testing.T) {
 
 func TestPluginLegacy(t *testing.T) {
 	plugMgr := volume.PluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), &volume.FakeHost{"/tmp/fake"})
+	plugMgr.InitPlugins(ProbeVolumePlugins(), &volume.FakeHost{"/tmp/fake", nil})
 
 	plug, err := plugMgr.FindPluginByName("gce-pd")
 	if err != nil {

pkg/kubelet/volume/git_repo/git_repo_test.go

@@ -35,7 +35,7 @@ func newTestHost(t *testing.T) volume.Host {
 	if err != nil {
 		t.Fatalf("can't make a temp rootdir: %v", err)
 	}
-	return &volume.FakeHost{tempDir}
+	return &volume.FakeHost{tempDir, nil}
 }
 
 func TestCanSupport(t *testing.T) {

pkg/kubelet/volume/host_path/host_path_test.go

@@ -26,7 +26,7 @@ import (
 
 func TestCanSupport(t *testing.T) {
 	plugMgr := volume.PluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), &volume.FakeHost{"fake"})
+	plugMgr.InitPlugins(ProbeVolumePlugins(), &volume.FakeHost{"fake", nil})
 
 	plug, err := plugMgr.FindPluginByName("kubernetes.io/host-path")
 	if err != nil {
@@ -45,7 +45,7 @@ func TestCanSupport(t *testing.T) {
 
 func TestPlugin(t *testing.T) {
 	plugMgr := volume.PluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), &volume.FakeHost{"fake"})
+	plugMgr.InitPlugins(ProbeVolumePlugins(), &volume.FakeHost{"fake", nil})
 
 	plug, err := plugMgr.FindPluginByName("kubernetes.io/host-path")
 	if err != nil {

pkg/kubelet/volume/plugins.go

@@ -22,6 +22,7 @@ import (
 	"sync"
 
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/client"
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/types"
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/util/errors"
@@ -76,6 +77,9 @@ type Host interface {
 	// does not exist, the result of this call might not exist.  This
 	// directory might not actually exist on disk yet.
 	GetPodPluginDir(podUID types.UID, pluginName string) string
+
+	// GetKubeClient returns a client interface
+	GetKubeClient() client.Interface
 }
 
 // PluginMgr tracks registered plugins.

pkg/kubelet/volume/secret/secret.go

+/*
+Copyright 2015 Google Inc. All rights reserved.
+
+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 secret
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path"
+
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/kubelet/volume"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/types"
+	"github.com/golang/glog"
+)
+
+// ProbeVolumePlugin is the entry point for plugin detection in a package.
+func ProbeVolumePlugins() []volume.Plugin {
+	return []volume.Plugin{&secretPlugin{}}
+}
+
+const (
+	secretPluginName = "kubernetes.io/secret"
+)
+
+// secretPlugin implements the VolumePlugin interface.
+type secretPlugin struct {
+	host volume.Host
+}
+
+func (plugin *secretPlugin) Init(host volume.Host) {
+	plugin.host = host
+}
+
+func (plugin *secretPlugin) Name() string {
+	return secretPluginName
+}
+
+func (plugin *secretPlugin) CanSupport(spec *api.Volume) bool {
+	if spec.Source.Secret != nil {
+		return true
+	}
+
+	return false
+}
+
+func (plugin *secretPlugin) NewBuilder(spec *api.Volume, podUID types.UID) (volume.Builder, error) {
+	return plugin.newBuilderInternal(spec, podUID)
+}
+
+func (plugin *secretPlugin) newBuilderInternal(spec *api.Volume, podUID types.UID) (volume.Builder, error) {
+	return &secretVolume{spec.Name, podUID, plugin, &spec.Source.Secret.Target}, nil
+}
+
+func (plugin *secretPlugin) NewCleaner(volName string, podUID types.UID) (volume.Cleaner, error) {
+	return plugin.newCleanerInternal(volName, podUID)
+}
+
+func (plugin *secretPlugin) newCleanerInternal(volName string, podUID types.UID) (volume.Cleaner, error) {
+	return &secretVolume{volName, podUID, plugin, nil}, nil
+}
+
+// secretVolume handles retrieving secrets from the API server
+// and placing them into the volume on the host.
+type secretVolume struct {
+	volName   string
+	podUID    types.UID
+	plugin    *secretPlugin
+	secretRef *api.ObjectReference
+}
+
+func (sv *secretVolume) SetUp() error {
+	// TODO: explore tmpfs for secret volumes
+	hostPath := sv.GetPath()
+	glog.V(3).Infof("Setting up volume %v for pod %v at %v", sv.volName, sv.podUID, hostPath)
+	err := os.MkdirAll(hostPath, 0777)
+	if err != nil {
+		return err
+	}
+
+	kubeClient := sv.plugin.host.GetKubeClient()
+	if kubeClient == nil {
+		return fmt.Errorf("Cannot setup secret volume %v because kube client is not configured", sv)
+	}
+
+	secret, err := kubeClient.Secrets(sv.secretRef.Namespace).Get(sv.secretRef.Name)
+	if err != nil {
+		glog.Errorf("Couldn't get secret %v/%v", sv.secretRef.Namespace, sv.secretRef.Name)
+		return err
+	}
+
+	for name, data := range secret.Data {
+		hostFilePath := path.Join(hostPath, name)
+		err := ioutil.WriteFile(hostFilePath, data, 0777)
+		if err != nil {
+			glog.Errorf("Error writing secret data to host path: %v, %v", hostFilePath, err)
+			return err
+		}
+	}
+
+	return nil
+}
+
+func (sv *secretVolume) GetPath() string {
+	return sv.plugin.host.GetPodVolumeDir(sv.podUID, volume.EscapePluginName(secretPluginName), sv.volName)
+}
+
+func (sv *secretVolume) TearDown() error {
+	glog.V(3).Infof("Tearing down volume %v for pod %v at %v", sv.volName, sv.podUID, sv.GetPath())
+	tmpDir, err := volume.RenameDirectory(sv.GetPath(), sv.volName+".deleting~")
+	if err != nil {
+		return err
+	}
+	err = os.RemoveAll(tmpDir)
+	if err != nil {
+		return err
+	}
+	return nil
+}

pkg/kubelet/volume/secret/secret_test.go

+/*
+Copyright 2015 Google Inc. All rights reserved.
+
+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 secret
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path"
+	"strings"
+	"testing"
+
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/client"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/kubelet/volume"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/types"
+)
+
+func newTestHost(t *testing.T, fakeKubeClient client.Interface) volume.Host {
+	tempDir, err := ioutil.TempDir("/tmp", "secret_volume_test.")
+	if err != nil {
+		t.Fatalf("can't make a temp rootdir: %v", err)
+	}
+
+	return &volume.FakeHost{tempDir, fakeKubeClient}
+}
+
+func TestCanSupport(t *testing.T) {
+	pluginMgr := volume.PluginMgr{}
+	pluginMgr.InitPlugins(ProbeVolumePlugins(), newTestHost(t, nil))
+
+	plugin, err := pluginMgr.FindPluginByName(secretPluginName)
+	if err != nil {
+		t.Errorf("Can't find the plugin by name")
+	}
+	if plugin.Name() != secretPluginName {
+		t.Errorf("Wrong name: %s", plugin.Name())
+	}
+	if !plugin.CanSupport(&api.Volume{Source: api.VolumeSource{Secret: &api.SecretSource{Target: api.ObjectReference{}}}}) {
+		t.Errorf("Expected true")
+	}
+}
+
+func TestPlugin(t *testing.T) {
+	var (
+		testPodUID     = "test_pod_uid"
+		testVolumeName = "test_volume_name"
+		testNamespace  = "test_secret_namespace"
+		testName       = "test_secret_name"
+	)
+
+	volumeSpec := &api.Volume{
+		Name: testVolumeName,
+		Source: api.VolumeSource{
+			Secret: &api.SecretSource{
+				Target: api.ObjectReference{
+					Namespace: testNamespace,
+					Name:      testName,
+				},
+			},
+		},
+	}
+
+	secret := api.Secret{
+		ObjectMeta: api.ObjectMeta{
+			Namespace: testNamespace,
+			Name:      testName,
+		},
+		Data: map[string][]byte{
+			"data-1": []byte("value-1"),
+			"data-2": []byte("value-2"),
+			"data-3": []byte("value-3"),
+		},
+	}
+
+	client := &client.Fake{
+		Secret: secret,
+	}
+
+	pluginMgr := volume.PluginMgr{}
+	pluginMgr.InitPlugins(ProbeVolumePlugins(), newTestHost(t, client))
+
+	plugin, err := pluginMgr.FindPluginByName(secretPluginName)
+	if err != nil {
+		t.Errorf("Can't find the plugin by name")
+	}
+
+	builder, err := plugin.NewBuilder(volumeSpec, types.UID(testPodUID))
+	if err != nil {
+		t.Errorf("Failed to make a new Builder: %v", err)
+	}
+	if builder == nil {
+		t.Errorf("Got a nil Builder: %v")
+	}
+
+	volumePath := builder.GetPath()
+	if !strings.HasSuffix(volumePath, fmt.Sprintf("pods/test_pod_uid/volumes/kubernetes.io~secret/test_volume_name")) {
+		t.Errorf("Got unexpected path: %s", volumePath)
+	}
+
+	err = builder.SetUp()
+	if err != nil {
+		t.Errorf("Failed to setup volume: %v", err)
+	}
+	if _, err := os.Stat(volumePath); err != nil {
+		if os.IsNotExist(err) {
+			t.Errorf("SetUp() failed, volume path not created: %s", volumePath)
+		} else {
+			t.Errorf("SetUp() failed: %v", err)
+		}
+	}
+
+	for key, value := range secret.Data {
+		secretDataHostPath := path.Join(volumePath, key)
+		if _, err := os.Stat(secretDataHostPath); err != nil {
+			t.Fatalf("SetUp() failed, couldn't find secret data on disk: %v", secretDataHostPath)
+		} else {
+			actualSecretBytes, err := ioutil.ReadFile(secretDataHostPath)
+			if err != nil {
+				t.Fatalf("Couldn't read secret data from: %v", secretDataHostPath)
+			}
+
+			actualSecretValue := string(actualSecretBytes)
+			if string(value) != actualSecretValue {
+				t.Errorf("Unexpected value; expected %q, got %q", value, actualSecretValue)
+			}
+		}
+	}
+
+	cleaner, err := plugin.NewCleaner(testVolumeName, types.UID(testPodUID))
+	if err != nil {
+		t.Errorf("Failed to make a new Cleaner: %v", err)
+	}
+	if cleaner == nil {
+		t.Errorf("Got a nil Cleaner: %v")
+	}
+
+	if err := cleaner.TearDown(); err != nil {
+		t.Errorf("Expected success, got: %v", err)
+	}
+	if _, err := os.Stat(volumePath); err == nil {
+		t.Errorf("TearDown() failed, volume path still exists: %s", volumePath)
+	} else if !os.IsNotExist(err) {
+		t.Errorf("SetUp() failed: %v", err)
+	}
+}

pkg/kubelet/volume/testing.go

@@ -21,12 +21,14 @@ import (
 	"path"
 
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/client"
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/types"
 )
 
 // FakeHost is useful for testing volume plugins.
 type FakeHost struct {
-	RootDir string
+	RootDir    string
+	KubeClient client.Interface
 }
 
 func (f *FakeHost) GetPluginDir(podUID string) string {
@@ -41,6 +43,10 @@ func (f *FakeHost) GetPodPluginDir(podUID types.UID, pluginName string) string {
 	return path.Join(f.RootDir, "pods", string(podUID), "plugins", pluginName)
 }
 
+func (f *FakeHost) GetKubeClient() client.Interface {
+	return f.KubeClient
+}
+
 // FakePlugin is useful for for testing.  It tries to be a fully compliant
 // plugin, but all it does is make empty directories.
 // Use as:

pkg/kubelet/volumes.go

@@ -22,6 +22,7 @@ import (
 	"path"
 
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/client"
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/kubelet/volume"
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/types"
 	"github.com/davecgh/go-spew/spew"
@@ -48,6 +49,10 @@ func (vh *volumeHost) GetPodPluginDir(podUID types.UID, pluginName string) strin
 	return vh.kubelet.getPodPluginDir(podUID, pluginName)
 }
 
+func (vh *volumeHost) GetKubeClient() client.Interface {
+	return vh.kubelet.kubeClient
+}
+
 func (kl *Kubelet) newVolumeBuilderFromPlugins(spec *api.Volume, podUID types.UID) volume.Builder {
 	plugin, err := kl.volumePluginMgr.FindPluginBySpec(spec)
 	if err != nil {

test/e2e/secrets.go

+/*
+Copyright 2014 Google Inc. All rights reserved.
+
+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 e2e
+
+import (
+	"fmt"
+	"strings"
+	"time"
+
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/client"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+var _ = Describe("Secrets", func() {
+	var c *client.Client
+
+	BeforeEach(func() {
+		var err error
+		c, err = loadClient()
+		Expect(err).NotTo(HaveOccurred())
+	})
+
+	It("should be consumable from pods", func() {
+		ns := api.NamespaceDefault
+		name := "secret-test-" + string(util.NewUUID())
+		volumeName := "secret-volume"
+		volumeMountPath := "/etc/secret-volume"
+
+		secret := &api.Secret{
+			ObjectMeta: api.ObjectMeta{
+				Namespace: ns,
+				Name:      name,
+			},
+			Data: map[string][]byte{
+				"data-1": []byte("value-1\n"),
+				"data-2": []byte("value-2\n"),
+				"data-3": []byte("value-3\n"),
+			},
+		}
+
+		secret, err := c.Secrets(ns).Create(secret)
+		By(fmt.Sprintf("Creating secret with name %s", secret.Name))
+		if err != nil {
+			Fail(fmt.Sprintf("unable to create test secret %s: %v", secret.Name, err))
+		}
+
+		// Clean up secret
+		defer func() {
+			By("Cleaning up the secret")
+			if err = c.Secrets(ns).Delete(secret.Name); err != nil {
+				Fail(fmt.Sprintf("unable to delete secret %v: %v", secret.Name, err))
+			}
+		}()
+
+		By(fmt.Sprintf("Creating a pod to consume secret %v", secret.Name))
+		// Make a client pod that verifies that it has the service environment variables.
+		clientName := "client-secrets-" + string(util.NewUUID())
+		clientPod := &api.Pod{
+			ObjectMeta: api.ObjectMeta{
+				Name: clientName,
+			},
+			Spec: api.PodSpec{
+				Volumes: []api.Volume{
+					{
+						Name: volumeName,
+						Source: api.VolumeSource{
+							Secret: &api.SecretSource{
+								Target: api.ObjectReference{
+									Kind:      "Secret",
+									Namespace: ns,
+									Name:      name,
+								},
+							},
+						},
+					},
+				},
+				Containers: []api.Container{
+					{
+						Name:    "catcont",
+						Image:   "busybox",
+						Command: []string{"sh", "-c", "cat /etc/secret-volume/data-1; sleep 600"},
+						VolumeMounts: []api.VolumeMount{
+							{
+								Name:      volumeName,
+								MountPath: volumeMountPath,
+								ReadOnly:  true,
+							},
+						},
+					},
+				},
+				RestartPolicy: api.RestartPolicy{
+					Never: &api.RestartPolicyNever{},
+				},
+			},
+		}
+
+		_, err = c.Pods(ns).Create(clientPod)
+		if err != nil {
+			Fail(fmt.Sprintf("Failed to create pod: %v", err))
+		}
+		defer func() {
+			c.Pods(ns).Delete(clientPod.Name)
+		}()
+
+		// Wait for client pod to complete.
+		expectNoError(waitForPodRunning(c, clientPod.Name, 60*time.Second))
+
+		// Grab its logs.  Get host first.
+		clientPodStatus, err := c.Pods(ns).Get(clientPod.Name)
+		if err != nil {
+			Fail(fmt.Sprintf("Failed to get clientPod to know host: %v", err))
+		}
+		By(fmt.Sprintf("Trying to get logs from host %s pod %s container %s: %v",
+			clientPodStatus.Status.Host, clientPodStatus.Name, clientPodStatus.Spec.Containers[0].Name, err))
+		var logs []byte
+		start := time.Now()
+
+		// Sometimes the actual containers take a second to get started, try to get logs for 60s
+		for time.Now().Sub(start) < (60 * time.Second) {
+			logs, err = c.Get().
+				Prefix("proxy").
+				Resource("minions").
+				Name(clientPodStatus.Status.Host).
+				Suffix("containerLogs", ns, clientPodStatus.Name, clientPodStatus.Spec.Containers[0].Name).
+				Do().
+				Raw()
+			fmt.Sprintf("clientPod logs:%v\n", string(logs))
+			By(fmt.Sprintf("clientPod logs:%v\n", string(logs)))
+			if strings.Contains(string(logs), "Internal Error") {
+				By(fmt.Sprintf("Failed to get logs from host %s pod %s container %s: %v",
+					clientPodStatus.Status.Host, clientPodStatus.Name, clientPodStatus.Spec.Containers[0].Name, string(logs)))
+				time.Sleep(5 * time.Second)
+				continue
+			}
+			break
+		}
+
+		toFind := []string{
+			"value-1",
+		}
+
+		for _, m := range toFind {
+			Expect(string(logs)).To(ContainSubstring(m), "%q in secret data", m)
+		}
+
+		// We could try a wget the service from the client pod.  But services.sh e2e test covers that pretty well.
+	})
+})