Refactor GCE wrapper library to allow execution from E2E test suite

This reverts commit 147b6911f5, reversing
changes made to 6fd986065b.

pkg/volume/gce_pd/gce_util.go

@@ -132,7 +132,7 @@ func attachDiskAndVerify(b *gcePersistentDiskBuilder, sdBeforeSet sets.String) (
 			glog.Warningf("Retrying attach for GCE PD %q (retry count=%v).", b.pdName, numRetries)
 		}
 
-		if err := gceCloud.AttachDisk(b.pdName, b.readOnly); err != nil {
+		if err := gceCloud.AttachDisk(b.pdName, b.plugin.host.GetHostName(), b.readOnly); err != nil {
 			glog.Errorf("Error attaching PD %q: %v", b.pdName, err)
 			time.Sleep(errorSleepDuration)
 			continue
@@ -206,7 +206,7 @@ func detachDiskAndVerify(c *gcePersistentDiskCleaner) {
 			glog.Warningf("Retrying detach for GCE PD %q (retry count=%v).", c.pdName, numRetries)
 		}
 
-		if err := gceCloud.DetachDisk(c.pdName); err != nil {
+		if err := gceCloud.DetachDisk(c.pdName, c.plugin.host.GetHostName()); err != nil {
 			glog.Errorf("Error detaching PD %q: %v", c.pdName, err)
 			time.Sleep(errorSleepDuration)
 			continue

pkg/volume/plugins.go

@@ -156,6 +156,9 @@ type VolumeHost interface {
 
 	// Get writer interface for writing data to disk.
 	GetWriter() io.Writer
+
+	// Returns the hostname of the host kubelet is running on
+	GetHostName() string
 }
 
 // VolumePluginMgr tracks registered plugins.

pkg/volume/testing.go

@@ -92,6 +92,11 @@ func (f *fakeVolumeHost) NewWrapperCleaner(spec *Spec, podUID types.UID) (Cleane
 	return plug.NewCleaner(spec.Name(), podUID)
 }
 
+// Returns the hostname of the host kubelet is running on
+func (f *fakeVolumeHost) GetHostName() string {
+	return "fakeHostName"
+}
+
 func ProbeVolumePlugins(config VolumeConfig) []VolumePlugin {
 	if _, ok := config.OtherAttributes["fake-property"]; ok {
 		return []VolumePlugin{