Move Kubelet pod-management code into kubelet_pods.go

pkg/kubelet/kubelet_volumes_test.go

@@ -17,9 +17,16 @@ limitations under the License.
 package kubelet
 
 import (
+	"fmt"
 	"testing"
 
+	"github.com/stretchr/testify/assert"
 	"k8s.io/kubernetes/pkg/api"
+	"k8s.io/kubernetes/pkg/client/testing/core"
+	"k8s.io/kubernetes/pkg/runtime"
+	"k8s.io/kubernetes/pkg/volume"
+	volumetest "k8s.io/kubernetes/pkg/volume/testing"
+	"k8s.io/kubernetes/pkg/volume/util/volumehelper"
 )
 
 func TestPodVolumesExist(t *testing.T) {
@@ -105,3 +112,298 @@ func TestPodVolumesExist(t *testing.T) {
 		}
 	}
 }
+
+func TestVolumeAttachAndMountControllerDisabled(t *testing.T) {
+	testKubelet := newTestKubelet(t, false /* controllerAttachDetachEnabled */)
+	kubelet := testKubelet.kubelet
+
+	pod := podWithUidNameNsSpec("12345678", "foo", "test", api.PodSpec{
+		Volumes: []api.Volume{
+			{
+				Name: "vol1",
+				VolumeSource: api.VolumeSource{
+					GCEPersistentDisk: &api.GCEPersistentDiskVolumeSource{
+						PDName: "fake-device",
+					},
+				},
+			},
+		},
+	})
+
+	stopCh := runVolumeManager(kubelet)
+	defer func() {
+		close(stopCh)
+	}()
+
+	kubelet.podManager.SetPods([]*api.Pod{pod})
+	err := kubelet.volumeManager.WaitForAttachAndMount(pod)
+	assert.NoError(t, err)
+
+	podVolumes := kubelet.volumeManager.GetMountedVolumesForPod(
+		volumehelper.GetUniquePodName(pod))
+
+	expectedPodVolumes := []string{"vol1"}
+	assert.Len(t, podVolumes, len(expectedPodVolumes), "Volumes for pod %+v", pod)
+	for _, name := range expectedPodVolumes {
+		assert.Contains(t, podVolumes, name, "Volumes for pod %+v", pod)
+	}
+	assert.True(t, testKubelet.volumePlugin.GetNewAttacherCallCount() >= 1, "Expected plugin NewAttacher to be called at least once")
+	assert.NoError(t, volumetest.VerifyWaitForAttachCallCount(
+		1 /* expectedWaitForAttachCallCount */, testKubelet.volumePlugin))
+	assert.NoError(t, volumetest.VerifyAttachCallCount(
+		1 /* expectedAttachCallCount */, testKubelet.volumePlugin))
+	assert.NoError(t, volumetest.VerifyMountDeviceCallCount(
+		1 /* expectedMountDeviceCallCount */, testKubelet.volumePlugin))
+	assert.NoError(t, volumetest.VerifySetUpCallCount(
+		1 /* expectedSetUpCallCount */, testKubelet.volumePlugin))
+}
+
+func TestVolumeUnmountAndDetachControllerDisabled(t *testing.T) {
+	testKubelet := newTestKubelet(t, false /* controllerAttachDetachEnabled */)
+	kubelet := testKubelet.kubelet
+
+	pod := podWithUidNameNsSpec("12345678", "foo", "test", api.PodSpec{
+		Volumes: []api.Volume{
+			{
+				Name: "vol1",
+				VolumeSource: api.VolumeSource{
+					GCEPersistentDisk: &api.GCEPersistentDiskVolumeSource{
+						PDName: "fake-device",
+					},
+				},
+			},
+		},
+	})
+
+	stopCh := runVolumeManager(kubelet)
+	defer func() {
+		close(stopCh)
+	}()
+
+	// Add pod
+	kubelet.podManager.SetPods([]*api.Pod{pod})
+
+	// Verify volumes attached
+	err := kubelet.volumeManager.WaitForAttachAndMount(pod)
+	assert.NoError(t, err)
+
+	podVolumes := kubelet.volumeManager.GetMountedVolumesForPod(
+		volumehelper.GetUniquePodName(pod))
+
+	expectedPodVolumes := []string{"vol1"}
+	assert.Len(t, podVolumes, len(expectedPodVolumes), "Volumes for pod %+v", pod)
+	for _, name := range expectedPodVolumes {
+		assert.Contains(t, podVolumes, name, "Volumes for pod %+v", pod)
+	}
+
+	assert.True(t, testKubelet.volumePlugin.GetNewAttacherCallCount() >= 1, "Expected plugin NewAttacher to be called at least once")
+	assert.NoError(t, volumetest.VerifyWaitForAttachCallCount(
+		1 /* expectedWaitForAttachCallCount */, testKubelet.volumePlugin))
+	assert.NoError(t, volumetest.VerifyAttachCallCount(
+		1 /* expectedAttachCallCount */, testKubelet.volumePlugin))
+	assert.NoError(t, volumetest.VerifyMountDeviceCallCount(
+		1 /* expectedMountDeviceCallCount */, testKubelet.volumePlugin))
+	assert.NoError(t, volumetest.VerifySetUpCallCount(
+		1 /* expectedSetUpCallCount */, testKubelet.volumePlugin))
+
+	// Remove pod
+	kubelet.podManager.SetPods([]*api.Pod{})
+
+	assert.NoError(t, waitForVolumeUnmount(kubelet.volumeManager, pod))
+
+	// Verify volumes unmounted
+	podVolumes = kubelet.volumeManager.GetMountedVolumesForPod(
+		volumehelper.GetUniquePodName(pod))
+
+	assert.Len(t, podVolumes, 0,
+		"Expected volumes to be unmounted and detached. But some volumes are still mounted: %#v", podVolumes)
+
+	assert.NoError(t, volumetest.VerifyTearDownCallCount(
+		1 /* expectedTearDownCallCount */, testKubelet.volumePlugin))
+
+	// Verify volumes detached and no longer reported as in use
+	assert.NoError(t, waitForVolumeDetach(api.UniqueVolumeName("fake/vol1"), kubelet.volumeManager))
+	assert.True(t, testKubelet.volumePlugin.GetNewAttacherCallCount() >= 1, "Expected plugin NewAttacher to be called at least once")
+	assert.NoError(t, volumetest.VerifyDetachCallCount(
+		1 /* expectedDetachCallCount */, testKubelet.volumePlugin))
+}
+
+func TestVolumeAttachAndMountControllerEnabled(t *testing.T) {
+	testKubelet := newTestKubelet(t, true /* controllerAttachDetachEnabled */)
+	kubelet := testKubelet.kubelet
+	kubeClient := testKubelet.fakeKubeClient
+	kubeClient.AddReactor("get", "nodes",
+		func(action core.Action) (bool, runtime.Object, error) {
+			return true, &api.Node{
+				ObjectMeta: api.ObjectMeta{Name: testKubeletHostname},
+				Status: api.NodeStatus{
+					VolumesAttached: []api.AttachedVolume{
+						{
+							Name:       "fake/vol1",
+							DevicePath: "fake/path",
+						},
+					}},
+				Spec: api.NodeSpec{ExternalID: testKubeletHostname},
+			}, nil
+		})
+	kubeClient.AddReactor("*", "*", func(action core.Action) (bool, runtime.Object, error) {
+		return true, nil, fmt.Errorf("no reaction implemented for %s", action)
+	})
+
+	pod := podWithUidNameNsSpec("12345678", "foo", "test", api.PodSpec{
+		Volumes: []api.Volume{
+			{
+				Name: "vol1",
+				VolumeSource: api.VolumeSource{
+					GCEPersistentDisk: &api.GCEPersistentDiskVolumeSource{
+						PDName: "fake-device",
+					},
+				},
+			},
+		},
+	})
+
+	stopCh := runVolumeManager(kubelet)
+	defer func() {
+		close(stopCh)
+	}()
+
+	kubelet.podManager.SetPods([]*api.Pod{pod})
+
+	// Fake node status update
+	go simulateVolumeInUseUpdate(
+		api.UniqueVolumeName("fake/vol1"),
+		stopCh,
+		kubelet.volumeManager)
+
+	assert.NoError(t, kubelet.volumeManager.WaitForAttachAndMount(pod))
+
+	podVolumes := kubelet.volumeManager.GetMountedVolumesForPod(
+		volumehelper.GetUniquePodName(pod))
+
+	expectedPodVolumes := []string{"vol1"}
+	assert.Len(t, podVolumes, len(expectedPodVolumes), "Volumes for pod %+v", pod)
+	for _, name := range expectedPodVolumes {
+		assert.Contains(t, podVolumes, name, "Volumes for pod %+v", pod)
+	}
+	assert.True(t, testKubelet.volumePlugin.GetNewAttacherCallCount() >= 1, "Expected plugin NewAttacher to be called at least once")
+	assert.NoError(t, volumetest.VerifyWaitForAttachCallCount(
+		1 /* expectedWaitForAttachCallCount */, testKubelet.volumePlugin))
+	assert.NoError(t, volumetest.VerifyZeroAttachCalls(testKubelet.volumePlugin))
+	assert.NoError(t, volumetest.VerifyMountDeviceCallCount(
+		1 /* expectedMountDeviceCallCount */, testKubelet.volumePlugin))
+	assert.NoError(t, volumetest.VerifySetUpCallCount(
+		1 /* expectedSetUpCallCount */, testKubelet.volumePlugin))
+}
+
+func TestVolumeUnmountAndDetachControllerEnabled(t *testing.T) {
+	testKubelet := newTestKubelet(t, true /* controllerAttachDetachEnabled */)
+	kubelet := testKubelet.kubelet
+	kubeClient := testKubelet.fakeKubeClient
+	kubeClient.AddReactor("get", "nodes",
+		func(action core.Action) (bool, runtime.Object, error) {
+			return true, &api.Node{
+				ObjectMeta: api.ObjectMeta{Name: testKubeletHostname},
+				Status: api.NodeStatus{
+					VolumesAttached: []api.AttachedVolume{
+						{
+							Name:       "fake/vol1",
+							DevicePath: "fake/path",
+						},
+					}},
+				Spec: api.NodeSpec{ExternalID: testKubeletHostname},
+			}, nil
+		})
+	kubeClient.AddReactor("*", "*", func(action core.Action) (bool, runtime.Object, error) {
+		return true, nil, fmt.Errorf("no reaction implemented for %s", action)
+	})
+
+	pod := podWithUidNameNsSpec("12345678", "foo", "test", api.PodSpec{
+		Volumes: []api.Volume{
+			{
+				Name: "vol1",
+				VolumeSource: api.VolumeSource{
+					GCEPersistentDisk: &api.GCEPersistentDiskVolumeSource{
+						PDName: "fake-device",
+					},
+				},
+			},
+		},
+	})
+
+	stopCh := runVolumeManager(kubelet)
+	defer func() {
+		close(stopCh)
+	}()
+
+	// Add pod
+	kubelet.podManager.SetPods([]*api.Pod{pod})
+
+	// Fake node status update
+	go simulateVolumeInUseUpdate(
+		api.UniqueVolumeName("fake/vol1"),
+		stopCh,
+		kubelet.volumeManager)
+
+	// Verify volumes attached
+	assert.NoError(t, kubelet.volumeManager.WaitForAttachAndMount(pod))
+
+	podVolumes := kubelet.volumeManager.GetMountedVolumesForPod(
+		volumehelper.GetUniquePodName(pod))
+
+	expectedPodVolumes := []string{"vol1"}
+	assert.Len(t, podVolumes, len(expectedPodVolumes), "Volumes for pod %+v", pod)
+	for _, name := range expectedPodVolumes {
+		assert.Contains(t, podVolumes, name, "Volumes for pod %+v", pod)
+	}
+
+	assert.True(t, testKubelet.volumePlugin.GetNewAttacherCallCount() >= 1, "Expected plugin NewAttacher to be called at least once")
+	assert.NoError(t, volumetest.VerifyWaitForAttachCallCount(
+		1 /* expectedWaitForAttachCallCount */, testKubelet.volumePlugin))
+	assert.NoError(t, volumetest.VerifyZeroAttachCalls(testKubelet.volumePlugin))
+	assert.NoError(t, volumetest.VerifyMountDeviceCallCount(
+		1 /* expectedMountDeviceCallCount */, testKubelet.volumePlugin))
+	assert.NoError(t, volumetest.VerifySetUpCallCount(
+		1 /* expectedSetUpCallCount */, testKubelet.volumePlugin))
+
+	// Remove pod
+	kubelet.podManager.SetPods([]*api.Pod{})
+
+	assert.NoError(t, waitForVolumeUnmount(kubelet.volumeManager, pod))
+
+	// Verify volumes unmounted
+	podVolumes = kubelet.volumeManager.GetMountedVolumesForPod(
+		volumehelper.GetUniquePodName(pod))
+
+	assert.Len(t, podVolumes, 0,
+		"Expected volumes to be unmounted and detached. But some volumes are still mounted: %#v", podVolumes)
+
+	assert.NoError(t, volumetest.VerifyTearDownCallCount(
+		1 /* expectedTearDownCallCount */, testKubelet.volumePlugin))
+
+	// Verify volumes detached and no longer reported as in use
+	assert.NoError(t, waitForVolumeDetach(api.UniqueVolumeName("fake/vol1"), kubelet.volumeManager))
+	assert.True(t, testKubelet.volumePlugin.GetNewAttacherCallCount() >= 1, "Expected plugin NewAttacher to be called at least once")
+	assert.NoError(t, volumetest.VerifyZeroDetachCallCount(testKubelet.volumePlugin))
+}
+
+type stubVolume struct {
+	path string
+	volume.MetricsNil
+}
+
+func (f *stubVolume) GetPath() string {
+	return f.path
+}
+
+func (f *stubVolume) GetAttributes() volume.Attributes {
+	return volume.Attributes{}
+}
+
+func (f *stubVolume) SetUp(fsGroup *int64) error {
+	return nil
+}
+
+func (f *stubVolume) SetUpAt(dir string, fsGroup *int64) error {
+	return nil
+}