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kubelet_test.go
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kubelet_test.go
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/*
Copyright 2014 The Kubernetes Authors.
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 kubelet
import (
"bytes"
"errors"
"fmt"
"io"
"io/ioutil"
"net"
"os"
"sort"
"testing"
"time"
cadvisorapi "github.com/google/cadvisor/info/v1"
cadvisorapiv2 "github.com/google/cadvisor/info/v2"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"k8s.io/kubernetes/pkg/api"
"k8s.io/kubernetes/pkg/api/resource"
"k8s.io/kubernetes/pkg/api/testapi"
"k8s.io/kubernetes/pkg/api/unversioned"
"k8s.io/kubernetes/pkg/apis/componentconfig"
"k8s.io/kubernetes/pkg/capabilities"
"k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset/fake"
"k8s.io/kubernetes/pkg/client/record"
"k8s.io/kubernetes/pkg/client/testing/core"
cadvisortest "k8s.io/kubernetes/pkg/kubelet/cadvisor/testing"
"k8s.io/kubernetes/pkg/kubelet/cm"
"k8s.io/kubernetes/pkg/kubelet/config"
kubecontainer "k8s.io/kubernetes/pkg/kubelet/container"
containertest "k8s.io/kubernetes/pkg/kubelet/container/testing"
"k8s.io/kubernetes/pkg/kubelet/eviction"
"k8s.io/kubernetes/pkg/kubelet/images"
"k8s.io/kubernetes/pkg/kubelet/lifecycle"
"k8s.io/kubernetes/pkg/kubelet/network"
nettest "k8s.io/kubernetes/pkg/kubelet/network/testing"
"k8s.io/kubernetes/pkg/kubelet/pleg"
kubepod "k8s.io/kubernetes/pkg/kubelet/pod"
podtest "k8s.io/kubernetes/pkg/kubelet/pod/testing"
proberesults "k8s.io/kubernetes/pkg/kubelet/prober/results"
probetest "k8s.io/kubernetes/pkg/kubelet/prober/testing"
"k8s.io/kubernetes/pkg/kubelet/server/stats"
"k8s.io/kubernetes/pkg/kubelet/status"
kubetypes "k8s.io/kubernetes/pkg/kubelet/types"
"k8s.io/kubernetes/pkg/kubelet/util/queue"
kubeletvolume "k8s.io/kubernetes/pkg/kubelet/volumemanager"
"k8s.io/kubernetes/pkg/runtime"
"k8s.io/kubernetes/pkg/types"
"k8s.io/kubernetes/pkg/util/clock"
"k8s.io/kubernetes/pkg/util/flowcontrol"
"k8s.io/kubernetes/pkg/util/mount"
utilruntime "k8s.io/kubernetes/pkg/util/runtime"
"k8s.io/kubernetes/pkg/util/sets"
"k8s.io/kubernetes/pkg/util/term"
"k8s.io/kubernetes/pkg/util/wait"
"k8s.io/kubernetes/pkg/volume"
_ "k8s.io/kubernetes/pkg/volume/host_path"
volumetest "k8s.io/kubernetes/pkg/volume/testing"
"k8s.io/kubernetes/pkg/volume/util/volumehelper"
)
func init() {
utilruntime.ReallyCrash = true
}
const (
testKubeletHostname = "127.0.0.1"
testReservationCPU = "200m"
testReservationMemory = "100M"
// TODO(harry) any global place for these two?
// Reasonable size range of all container images. 90%ile of images on dockerhub drops into this range.
minImgSize int64 = 23 * 1024 * 1024
maxImgSize int64 = 1000 * 1024 * 1024
)
// fakeImageGCManager is a fake image gc manager for testing. It will return image
// list from fake runtime directly instead of caching it.
type fakeImageGCManager struct {
fakeImageService kubecontainer.Runtime
images.ImageGCManager
}
func (f *fakeImageGCManager) GetImageList() ([]kubecontainer.Image, error) {
return f.fakeImageService.ListImages()
}
type TestKubelet struct {
kubelet *Kubelet
fakeRuntime *containertest.FakeRuntime
fakeCadvisor *cadvisortest.Mock
fakeKubeClient *fake.Clientset
fakeMirrorClient *podtest.FakeMirrorClient
fakeClock *clock.FakeClock
mounter mount.Interface
volumePlugin *volumetest.FakeVolumePlugin
}
// newTestKubelet returns test kubelet with two images.
func newTestKubelet(t *testing.T, controllerAttachDetachEnabled bool) *TestKubelet {
imageList := []kubecontainer.Image{
{
ID: "abc",
RepoTags: []string{"gcr.io/google_containers:v1", "gcr.io/google_containers:v2"},
Size: 123,
},
{
ID: "efg",
RepoTags: []string{"gcr.io/google_containers:v3", "gcr.io/google_containers:v4"},
Size: 456,
},
}
return newTestKubeletWithImageList(t, imageList, controllerAttachDetachEnabled)
}
func newTestKubeletWithImageList(
t *testing.T,
imageList []kubecontainer.Image,
controllerAttachDetachEnabled bool) *TestKubelet {
fakeRuntime := &containertest.FakeRuntime{}
fakeRuntime.RuntimeType = "test"
fakeRuntime.VersionInfo = "1.5.0"
fakeRuntime.ImageList = imageList
fakeRecorder := &record.FakeRecorder{}
fakeKubeClient := &fake.Clientset{}
kubelet := &Kubelet{}
kubelet.recorder = fakeRecorder
kubelet.kubeClient = fakeKubeClient
kubelet.os = &containertest.FakeOS{}
kubelet.hostname = testKubeletHostname
kubelet.nodeName = testKubeletHostname
kubelet.runtimeState = newRuntimeState(maxWaitForContainerRuntime)
kubelet.runtimeState.setNetworkState(nil)
kubelet.networkPlugin, _ = network.InitNetworkPlugin([]network.NetworkPlugin{}, "", nettest.NewFakeHost(nil), componentconfig.HairpinNone, kubelet.nonMasqueradeCIDR, 1440)
if tempDir, err := ioutil.TempDir("/tmp", "kubelet_test."); err != nil {
t.Fatalf("can't make a temp rootdir: %v", err)
} else {
kubelet.rootDirectory = tempDir
}
if err := os.MkdirAll(kubelet.rootDirectory, 0750); err != nil {
t.Fatalf("can't mkdir(%q): %v", kubelet.rootDirectory, err)
}
kubelet.sourcesReady = config.NewSourcesReady(func(_ sets.String) bool { return true })
kubelet.masterServiceNamespace = api.NamespaceDefault
kubelet.serviceLister = testServiceLister{}
kubelet.nodeLister = testNodeLister{}
kubelet.nodeInfo = testNodeInfo{}
kubelet.recorder = fakeRecorder
if err := kubelet.setupDataDirs(); err != nil {
t.Fatalf("can't initialize kubelet data dirs: %v", err)
}
kubelet.daemonEndpoints = &api.NodeDaemonEndpoints{}
mockCadvisor := &cadvisortest.Mock{}
kubelet.cadvisor = mockCadvisor
fakeMirrorClient := podtest.NewFakeMirrorClient()
kubelet.podManager = kubepod.NewBasicPodManager(fakeMirrorClient)
kubelet.statusManager = status.NewManager(fakeKubeClient, kubelet.podManager)
kubelet.containerRefManager = kubecontainer.NewRefManager()
diskSpaceManager, err := newDiskSpaceManager(mockCadvisor, DiskSpacePolicy{})
if err != nil {
t.Fatalf("can't initialize disk space manager: %v", err)
}
kubelet.diskSpaceManager = diskSpaceManager
kubelet.containerRuntime = fakeRuntime
kubelet.runtimeCache = containertest.NewFakeRuntimeCache(kubelet.containerRuntime)
kubelet.reasonCache = NewReasonCache()
kubelet.podCache = containertest.NewFakeCache(kubelet.containerRuntime)
kubelet.podWorkers = &fakePodWorkers{
syncPodFn: kubelet.syncPod,
cache: kubelet.podCache,
t: t,
}
kubelet.probeManager = probetest.FakeManager{}
kubelet.livenessManager = proberesults.NewManager()
kubelet.containerManager = cm.NewStubContainerManager()
fakeNodeRef := &api.ObjectReference{
Kind: "Node",
Name: testKubeletHostname,
UID: types.UID(testKubeletHostname),
Namespace: "",
}
fakeImageGCPolicy := images.ImageGCPolicy{
HighThresholdPercent: 90,
LowThresholdPercent: 80,
}
imageGCManager, err := images.NewImageGCManager(fakeRuntime, mockCadvisor, fakeRecorder, fakeNodeRef, fakeImageGCPolicy)
assert.NoError(t, err)
kubelet.imageManager = &fakeImageGCManager{
fakeImageService: fakeRuntime,
ImageGCManager: imageGCManager,
}
fakeClock := clock.NewFakeClock(time.Now())
kubelet.backOff = flowcontrol.NewBackOff(time.Second, time.Minute)
kubelet.backOff.Clock = fakeClock
kubelet.podKillingCh = make(chan *kubecontainer.PodPair, 20)
kubelet.resyncInterval = 10 * time.Second
kubelet.reservation = kubetypes.Reservation{
Kubernetes: api.ResourceList{
api.ResourceCPU: resource.MustParse(testReservationCPU),
api.ResourceMemory: resource.MustParse(testReservationMemory),
},
}
kubelet.workQueue = queue.NewBasicWorkQueue(fakeClock)
// Relist period does not affect the tests.
kubelet.pleg = pleg.NewGenericPLEG(fakeRuntime, 100, time.Hour, nil, clock.RealClock{})
kubelet.clock = fakeClock
kubelet.setNodeStatusFuncs = kubelet.defaultNodeStatusFuncs()
// TODO: Factor out "StatsProvider" from Kubelet so we don't have a cyclic dependency
volumeStatsAggPeriod := time.Second * 10
kubelet.resourceAnalyzer = stats.NewResourceAnalyzer(kubelet, volumeStatsAggPeriod, kubelet.containerRuntime)
nodeRef := &api.ObjectReference{
Kind: "Node",
Name: kubelet.nodeName,
UID: types.UID(kubelet.nodeName),
Namespace: "",
}
// setup eviction manager
evictionManager, evictionAdmitHandler, err := eviction.NewManager(kubelet.resourceAnalyzer, eviction.Config{}, killPodNow(kubelet.podWorkers, fakeRecorder), kubelet.imageManager, fakeRecorder, nodeRef, kubelet.clock)
require.NoError(t, err, "Failed to initialize eviction manager")
kubelet.evictionManager = evictionManager
kubelet.AddPodAdmitHandler(evictionAdmitHandler)
plug := &volumetest.FakeVolumePlugin{PluginName: "fake", Host: nil}
kubelet.volumePluginMgr, err =
NewInitializedVolumePluginMgr(kubelet, []volume.VolumePlugin{plug})
require.NoError(t, err, "Failed to initialize VolumePluginMgr")
kubelet.mounter = &mount.FakeMounter{}
kubelet.volumeManager, err = kubeletvolume.NewVolumeManager(
controllerAttachDetachEnabled,
kubelet.hostname,
kubelet.podManager,
fakeKubeClient,
kubelet.volumePluginMgr,
fakeRuntime,
kubelet.mounter,
kubelet.getPodsDir(),
kubelet.recorder,
false /* experimentalCheckNodeCapabilitiesBeforeMount*/)
require.NoError(t, err, "Failed to initialize volume manager")
// enable active deadline handler
activeDeadlineHandler, err := newActiveDeadlineHandler(kubelet.statusManager, kubelet.recorder, kubelet.clock)
require.NoError(t, err, "Can't initialize active deadline handler")
kubelet.AddPodSyncLoopHandler(activeDeadlineHandler)
kubelet.AddPodSyncHandler(activeDeadlineHandler)
return &TestKubelet{kubelet, fakeRuntime, mockCadvisor, fakeKubeClient, fakeMirrorClient, fakeClock, nil, plug}
}
func newTestPods(count int) []*api.Pod {
pods := make([]*api.Pod, count)
for i := 0; i < count; i++ {
pods[i] = &api.Pod{
Spec: api.PodSpec{
SecurityContext: &api.PodSecurityContext{
HostNetwork: true,
},
},
ObjectMeta: api.ObjectMeta{
UID: types.UID(10000 + i),
Name: fmt.Sprintf("pod%d", i),
},
}
}
return pods
}
var emptyPodUIDs map[types.UID]kubetypes.SyncPodType
func TestSyncLoopTimeUpdate(t *testing.T) {
testKubelet := newTestKubelet(t, false /* controllerAttachDetachEnabled */)
testKubelet.fakeCadvisor.On("MachineInfo").Return(&cadvisorapi.MachineInfo{}, nil)
kubelet := testKubelet.kubelet
loopTime1 := kubelet.LatestLoopEntryTime()
require.True(t, loopTime1.IsZero(), "Expect sync loop time to be zero")
// Start sync ticker.
syncCh := make(chan time.Time, 1)
housekeepingCh := make(chan time.Time, 1)
plegCh := make(chan *pleg.PodLifecycleEvent)
syncCh <- time.Now()
kubelet.syncLoopIteration(make(chan kubetypes.PodUpdate), kubelet, syncCh, housekeepingCh, plegCh)
loopTime2 := kubelet.LatestLoopEntryTime()
require.False(t, loopTime2.IsZero(), "Expect sync loop time to be non-zero")
syncCh <- time.Now()
kubelet.syncLoopIteration(make(chan kubetypes.PodUpdate), kubelet, syncCh, housekeepingCh, plegCh)
loopTime3 := kubelet.LatestLoopEntryTime()
require.True(t, loopTime3.After(loopTime1),
"Sync Loop Time was not updated correctly. Second update timestamp %v should be greater than first update timestamp %v",
loopTime3, loopTime1)
}
func TestSyncLoopAbort(t *testing.T) {
testKubelet := newTestKubelet(t, false /* controllerAttachDetachEnabled */)
testKubelet.fakeCadvisor.On("MachineInfo").Return(&cadvisorapi.MachineInfo{}, nil)
kubelet := testKubelet.kubelet
kubelet.runtimeState.setRuntimeSync(time.Now())
// The syncLoop waits on time.After(resyncInterval), set it really big so that we don't race for
// the channel close
kubelet.resyncInterval = time.Second * 30
ch := make(chan kubetypes.PodUpdate)
close(ch)
// sanity check (also prevent this test from hanging in the next step)
ok := kubelet.syncLoopIteration(ch, kubelet, make(chan time.Time), make(chan time.Time), make(chan *pleg.PodLifecycleEvent, 1))
require.False(t, ok, "Expected syncLoopIteration to return !ok since update chan was closed")
// this should terminate immediately; if it hangs then the syncLoopIteration isn't aborting properly
kubelet.syncLoop(ch, kubelet)
}
func TestSyncPodsStartPod(t *testing.T) {
testKubelet := newTestKubelet(t, false /* controllerAttachDetachEnabled */)
testKubelet.fakeCadvisor.On("VersionInfo").Return(&cadvisorapi.VersionInfo{}, nil)
testKubelet.fakeCadvisor.On("MachineInfo").Return(&cadvisorapi.MachineInfo{}, nil)
testKubelet.fakeCadvisor.On("ImagesFsInfo").Return(cadvisorapiv2.FsInfo{}, nil)
testKubelet.fakeCadvisor.On("RootFsInfo").Return(cadvisorapiv2.FsInfo{}, nil)
kubelet := testKubelet.kubelet
fakeRuntime := testKubelet.fakeRuntime
pods := []*api.Pod{
podWithUidNameNsSpec("12345678", "foo", "new", api.PodSpec{
Containers: []api.Container{
{Name: "bar"},
},
}),
}
kubelet.podManager.SetPods(pods)
kubelet.HandlePodSyncs(pods)
fakeRuntime.AssertStartedPods([]string{string(pods[0].UID)})
}
func TestSyncPodsDeletesWhenSourcesAreReady(t *testing.T) {
ready := false
testKubelet := newTestKubelet(t, false /* controllerAttachDetachEnabled */)
fakeRuntime := testKubelet.fakeRuntime
testKubelet.fakeCadvisor.On("MachineInfo").Return(&cadvisorapi.MachineInfo{}, nil)
testKubelet.fakeCadvisor.On("ImagesFsInfo").Return(cadvisorapiv2.FsInfo{}, nil)
testKubelet.fakeCadvisor.On("RootFsInfo").Return(cadvisorapiv2.FsInfo{}, nil)
kubelet := testKubelet.kubelet
kubelet.sourcesReady = config.NewSourcesReady(func(_ sets.String) bool { return ready })
fakeRuntime.PodList = []*containertest.FakePod{
{Pod: &kubecontainer.Pod{
ID: "12345678",
Name: "foo",
Namespace: "new",
Containers: []*kubecontainer.Container{
{Name: "bar"},
},
}},
}
kubelet.HandlePodCleanups()
// Sources are not ready yet. Don't remove any pods.
fakeRuntime.AssertKilledPods([]string{})
ready = true
kubelet.HandlePodCleanups()
// Sources are ready. Remove unwanted pods.
fakeRuntime.AssertKilledPods([]string{"12345678"})
}
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) CanMount() error {
return nil
}
func (f *stubVolume) SetUp(fsGroup *int64) error {
return nil
}
func (f *stubVolume) SetUpAt(dir string, fsGroup *int64) error {
return nil
}
func TestMakeVolumeMounts(t *testing.T) {
container := api.Container{
VolumeMounts: []api.VolumeMount{
{
MountPath: "/etc/hosts",
Name: "disk",
ReadOnly: false,
},
{
MountPath: "/mnt/path3",
Name: "disk",
ReadOnly: true,
},
{
MountPath: "/mnt/path4",
Name: "disk4",
ReadOnly: false,
},
{
MountPath: "/mnt/path5",
Name: "disk5",
ReadOnly: false,
},
},
}
podVolumes := kubecontainer.VolumeMap{
"disk": kubecontainer.VolumeInfo{Mounter: &stubVolume{path: "/mnt/disk"}},
"disk4": kubecontainer.VolumeInfo{Mounter: &stubVolume{path: "/mnt/host"}},
"disk5": kubecontainer.VolumeInfo{Mounter: &stubVolume{path: "/var/lib/kubelet/podID/volumes/empty/disk5"}},
}
pod := api.Pod{
Spec: api.PodSpec{
SecurityContext: &api.PodSecurityContext{
HostNetwork: true,
},
},
}
mounts, _ := makeMounts(&pod, "/pod", &container, "fakepodname", "", "", podVolumes)
expectedMounts := []kubecontainer.Mount{
{
Name: "disk",
ContainerPath: "/etc/hosts",
HostPath: "/mnt/disk",
ReadOnly: false,
SELinuxRelabel: false,
},
{
Name: "disk",
ContainerPath: "/mnt/path3",
HostPath: "/mnt/disk",
ReadOnly: true,
SELinuxRelabel: false,
},
{
Name: "disk4",
ContainerPath: "/mnt/path4",
HostPath: "/mnt/host",
ReadOnly: false,
SELinuxRelabel: false,
},
{
Name: "disk5",
ContainerPath: "/mnt/path5",
HostPath: "/var/lib/kubelet/podID/volumes/empty/disk5",
ReadOnly: false,
SELinuxRelabel: false,
},
}
assert.Equal(t, expectedMounts, mounts, "mounts of container %+v", container)
}
type fakeContainerCommandRunner struct {
// what was passed in
Cmd []string
ID kubecontainer.ContainerID
PodID types.UID
E error
Stdin io.Reader
Stdout io.WriteCloser
Stderr io.WriteCloser
TTY bool
Port uint16
Stream io.ReadWriteCloser
// what to return
StdoutData string
StderrData string
}
func (f *fakeContainerCommandRunner) ExecInContainer(id kubecontainer.ContainerID, cmd []string, in io.Reader, out, err io.WriteCloser, tty bool, resize <-chan term.Size) error {
// record params
f.Cmd = cmd
f.ID = id
f.Stdin = in
f.Stdout = out
f.Stderr = err
f.TTY = tty
// Copy stdout/stderr data
fmt.Fprint(out, f.StdoutData)
fmt.Fprint(out, f.StderrData)
return f.E
}
func (f *fakeContainerCommandRunner) PortForward(pod *kubecontainer.Pod, port uint16, stream io.ReadWriteCloser) error {
f.PodID = pod.ID
f.Port = port
f.Stream = stream
return nil
}
func TestRunInContainerNoSuchPod(t *testing.T) {
testKubelet := newTestKubelet(t, false /* controllerAttachDetachEnabled */)
kubelet := testKubelet.kubelet
fakeRuntime := testKubelet.fakeRuntime
fakeRuntime.PodList = []*containertest.FakePod{}
podName := "podFoo"
podNamespace := "nsFoo"
containerName := "containerFoo"
output, err := kubelet.RunInContainer(
kubecontainer.GetPodFullName(&api.Pod{ObjectMeta: api.ObjectMeta{Name: podName, Namespace: podNamespace}}),
"",
containerName,
[]string{"ls"})
assert.Error(t, err)
assert.Nil(t, output, "output should be nil")
}
func TestRunInContainer(t *testing.T) {
for _, testError := range []error{nil, errors.New("foo")} {
testKubelet := newTestKubelet(t, false /* controllerAttachDetachEnabled */)
kubelet := testKubelet.kubelet
fakeRuntime := testKubelet.fakeRuntime
fakeCommandRunner := fakeContainerCommandRunner{
E: testError,
StdoutData: "foo",
StderrData: "bar",
}
kubelet.runner = &fakeCommandRunner
containerID := kubecontainer.ContainerID{Type: "test", ID: "abc1234"}
fakeRuntime.PodList = []*containertest.FakePod{
{Pod: &kubecontainer.Pod{
ID: "12345678",
Name: "podFoo",
Namespace: "nsFoo",
Containers: []*kubecontainer.Container{
{Name: "containerFoo",
ID: containerID,
},
},
}},
}
cmd := []string{"ls"}
actualOutput, err := kubelet.RunInContainer("podFoo_nsFoo", "", "containerFoo", cmd)
assert.Equal(t, containerID, fakeCommandRunner.ID, "(testError=%v) ID", testError)
assert.Equal(t, cmd, fakeCommandRunner.Cmd, "(testError=%v) command", testError)
// this isn't 100% foolproof as a bug in a real ContainerCommandRunner where it fails to copy to stdout/stderr wouldn't be caught by this test
assert.Equal(t, "foobar", string(actualOutput), "(testError=%v) output", testError)
assert.Equal(t, fmt.Sprintf("%s", err), fmt.Sprintf("%s", testError), "(testError=%v) err", testError)
}
}
func TestDNSConfigurationParams(t *testing.T) {
testKubelet := newTestKubelet(t, false /* controllerAttachDetachEnabled */)
kubelet := testKubelet.kubelet
clusterNS := "203.0.113.1"
kubelet.clusterDomain = "kubernetes.io"
kubelet.clusterDNS = net.ParseIP(clusterNS)
pods := newTestPods(2)
pods[0].Spec.DNSPolicy = api.DNSClusterFirst
pods[1].Spec.DNSPolicy = api.DNSDefault
options := make([]*kubecontainer.RunContainerOptions, 2)
for i, pod := range pods {
var err error
options[i], err = kubelet.GenerateRunContainerOptions(pod, &api.Container{}, "")
if err != nil {
t.Fatalf("failed to generate container options: %v", err)
}
}
if len(options[0].DNS) != 1 || options[0].DNS[0] != clusterNS {
t.Errorf("expected nameserver %s, got %+v", clusterNS, options[0].DNS)
}
if len(options[0].DNSSearch) == 0 || options[0].DNSSearch[0] != ".svc."+kubelet.clusterDomain {
t.Errorf("expected search %s, got %+v", ".svc."+kubelet.clusterDomain, options[0].DNSSearch)
}
if len(options[1].DNS) != 1 || options[1].DNS[0] != "127.0.0.1" {
t.Errorf("expected nameserver 127.0.0.1, got %+v", options[1].DNS)
}
if len(options[1].DNSSearch) != 1 || options[1].DNSSearch[0] != "." {
t.Errorf("expected search \".\", got %+v", options[1].DNSSearch)
}
kubelet.resolverConfig = "/etc/resolv.conf"
for i, pod := range pods {
var err error
options[i], err = kubelet.GenerateRunContainerOptions(pod, &api.Container{}, "")
if err != nil {
t.Fatalf("failed to generate container options: %v", err)
}
}
t.Logf("nameservers %+v", options[1].DNS)
if len(options[0].DNS) != 1 {
t.Errorf("expected cluster nameserver only, got %+v", options[0].DNS)
} else if options[0].DNS[0] != clusterNS {
t.Errorf("expected nameserver %s, got %v", clusterNS, options[0].DNS[0])
}
if len(options[0].DNSSearch) != len(options[1].DNSSearch)+3 {
t.Errorf("expected prepend of cluster domain, got %+v", options[0].DNSSearch)
} else if options[0].DNSSearch[0] != ".svc."+kubelet.clusterDomain {
t.Errorf("expected domain %s, got %s", ".svc."+kubelet.clusterDomain, options[0].DNSSearch)
}
}
type testServiceLister struct {
services []api.Service
}
func (ls testServiceLister) List() (api.ServiceList, error) {
return api.ServiceList{
Items: ls.services,
}, nil
}
type testNodeLister struct {
nodes []api.Node
}
type testNodeInfo struct {
nodes []api.Node
}
func (ls testNodeInfo) GetNodeInfo(id string) (*api.Node, error) {
for _, node := range ls.nodes {
if node.Name == id {
return &node, nil
}
}
return nil, fmt.Errorf("Node with name: %s does not exist", id)
}
func (ls testNodeLister) List() (api.NodeList, error) {
return api.NodeList{
Items: ls.nodes,
}, nil
}
type envs []kubecontainer.EnvVar
func (e envs) Len() int {
return len(e)
}
func (e envs) Swap(i, j int) { e[i], e[j] = e[j], e[i] }
func (e envs) Less(i, j int) bool { return e[i].Name < e[j].Name }
func buildService(name, namespace, clusterIP, protocol string, port int) api.Service {
return api.Service{
ObjectMeta: api.ObjectMeta{Name: name, Namespace: namespace},
Spec: api.ServiceSpec{
Ports: []api.ServicePort{{
Protocol: api.Protocol(protocol),
Port: int32(port),
}},
ClusterIP: clusterIP,
},
}
}
func TestMakeEnvironmentVariables(t *testing.T) {
services := []api.Service{
buildService("kubernetes", api.NamespaceDefault, "1.2.3.1", "TCP", 8081),
buildService("test", "test1", "1.2.3.3", "TCP", 8083),
buildService("kubernetes", "test2", "1.2.3.4", "TCP", 8084),
buildService("test", "test2", "1.2.3.5", "TCP", 8085),
buildService("test", "test2", "None", "TCP", 8085),
buildService("test", "test2", "", "TCP", 8085),
buildService("kubernetes", "kubernetes", "1.2.3.6", "TCP", 8086),
buildService("not-special", "kubernetes", "1.2.3.8", "TCP", 8088),
buildService("not-special", "kubernetes", "None", "TCP", 8088),
buildService("not-special", "kubernetes", "", "TCP", 8088),
}
testCases := []struct {
name string // the name of the test case
ns string // the namespace to generate environment for
container *api.Container // the container to use
masterServiceNs string // the namespace to read master service info from
nilLister bool // whether the lister should be nil
expectedEnvs []kubecontainer.EnvVar // a set of expected environment vars
}{
{
name: "api server = Y, kubelet = Y",
ns: "test1",
container: &api.Container{
Env: []api.EnvVar{
{Name: "FOO", Value: "BAR"},