Attach detach controller business logic added

Split controller cache into actual and desired state of world.
Controller will only operate on volumes scheduled to nodes that
have the "volumes.kubernetes.io/controller-managed-attach" annotation.

pkg/controller/volume/testing/testvolumepluginmgr.go

@@ -0,0 +1,102 @@
+/*
+Copyright 2016 The Kubernetes Authors 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 testing
+
+import (
+	"fmt"
+	"testing"
+
+	"k8s.io/kubernetes/pkg/api"
+	"k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset"
+	"k8s.io/kubernetes/pkg/cloudprovider"
+	"k8s.io/kubernetes/pkg/cloudprovider/providers/fake"
+	"k8s.io/kubernetes/pkg/types"
+	"k8s.io/kubernetes/pkg/util/io"
+	"k8s.io/kubernetes/pkg/util/mount"
+	"k8s.io/kubernetes/pkg/volume"
+	volumetesting "k8s.io/kubernetes/pkg/volume/testing"
+)
+
+// GetTestVolumePluginMgr creates, initializes, and returns a test volume
+// plugin manager.
+func GetTestVolumePluginMgr(t *testing.T) (*volume.VolumePluginMgr, *volumetesting.FakeVolumePlugin) {
+	plugins := []volume.VolumePlugin{}
+
+	// plugins = append(plugins, aws_ebs.ProbeVolumePlugins()...)
+	// plugins = append(plugins, gce_pd.ProbeVolumePlugins()...)
+	// plugins = append(plugins, cinder.ProbeVolumePlugins()...)
+	volumeTestingPlugins := volumetesting.ProbeVolumePlugins(volume.VolumeConfig{})
+	plugins = append(plugins, volumeTestingPlugins...)
+
+	volumePluginMgr := testVolumePluginMgr{}
+
+	if err := volumePluginMgr.InitPlugins(plugins, &volumePluginMgr); err != nil {
+		t.Fatalf("Could not initialize volume plugins for Attach/Detach Controller: %+v", err)
+	}
+
+	return &volumePluginMgr.VolumePluginMgr, volumeTestingPlugins[0].(*volumetesting.FakeVolumePlugin)
+}
+
+type testVolumePluginMgr struct {
+	volume.VolumePluginMgr
+}
+
+// VolumeHost implementation
+// This is an unfortunate requirement of the current factoring of volume plugin
+// initializing code. It requires kubelet specific methods used by the mounting
+// code to be implemented by all initializers even if the initializer does not
+// do mounting (like this attach/detach controller).
+// Issue kubernetes/kubernetes/issues/14217 to fix this.
+func (vpm *testVolumePluginMgr) GetPluginDir(podUID string) string {
+	return ""
+}
+
+func (vpm *testVolumePluginMgr) GetPodVolumeDir(podUID types.UID, pluginName, volumeName string) string {
+	return ""
+}
+
+func (vpm *testVolumePluginMgr) GetPodPluginDir(podUID types.UID, pluginName string) string {
+	return ""
+}
+
+func (vpm *testVolumePluginMgr) GetKubeClient() internalclientset.Interface {
+	return nil
+}
+
+func (vpm *testVolumePluginMgr) NewWrapperMounter(volName string, spec volume.Spec, pod *api.Pod, opts volume.VolumeOptions) (volume.Mounter, error) {
+	return nil, fmt.Errorf("NewWrapperMounter not supported by Attach/Detach controller's VolumeHost implementation")
+}
+
+func (vpm *testVolumePluginMgr) NewWrapperUnmounter(volName string, spec volume.Spec, podUID types.UID) (volume.Unmounter, error) {
+	return nil, fmt.Errorf("NewWrapperUnmounter not supported by Attach/Detach controller's VolumeHost implementation")
+}
+
+func (vpm *testVolumePluginMgr) GetCloudProvider() cloudprovider.Interface {
+	return &fake.FakeCloud{}
+}
+
+func (vpm *testVolumePluginMgr) GetMounter() mount.Interface {
+	return nil
+}
+
+func (vpm *testVolumePluginMgr) GetWriter() io.Writer {
+	return nil
+}
+
+func (vpm *testVolumePluginMgr) GetHostName() string {
+	return ""
+}