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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 (
"context"
"fmt"
"io/ioutil"
"os"
"reflect"
goruntime "runtime"
"sort"
"strconv"
"testing"
"time"
cadvisorapi "github.com/google/cadvisor/info/v1"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
core "k8s.io/client-go/testing"
"k8s.io/mount-utils"
v1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/resource"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/sets"
"k8s.io/apimachinery/pkg/util/wait"
"k8s.io/client-go/kubernetes/fake"
"k8s.io/client-go/tools/record"
"k8s.io/client-go/util/flowcontrol"
cadvisortest "k8s.io/kubernetes/pkg/kubelet/cadvisor/testing"
"k8s.io/kubernetes/pkg/kubelet/cm"
"k8s.io/kubernetes/pkg/kubelet/config"
"k8s.io/kubernetes/pkg/kubelet/configmap"
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/logs"
"k8s.io/kubernetes/pkg/kubelet/network/dns"
"k8s.io/kubernetes/pkg/kubelet/nodeshutdown"
"k8s.io/kubernetes/pkg/kubelet/pleg"
"k8s.io/kubernetes/pkg/kubelet/pluginmanager"
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/secret"
serverstats "k8s.io/kubernetes/pkg/kubelet/server/stats"
"k8s.io/kubernetes/pkg/kubelet/stats"
"k8s.io/kubernetes/pkg/kubelet/status"
statustest "k8s.io/kubernetes/pkg/kubelet/status/testing"
"k8s.io/kubernetes/pkg/kubelet/token"
kubetypes "k8s.io/kubernetes/pkg/kubelet/types"
"k8s.io/kubernetes/pkg/kubelet/util/queue"
kubeletvolume "k8s.io/kubernetes/pkg/kubelet/volumemanager"
schedulerframework "k8s.io/kubernetes/pkg/scheduler/framework"
"k8s.io/kubernetes/pkg/volume"
"k8s.io/kubernetes/pkg/volume/awsebs"
"k8s.io/kubernetes/pkg/volume/azuredd"
"k8s.io/kubernetes/pkg/volume/gcepd"
_ "k8s.io/kubernetes/pkg/volume/hostpath"
volumetest "k8s.io/kubernetes/pkg/volume/testing"
"k8s.io/kubernetes/pkg/volume/util"
"k8s.io/kubernetes/pkg/volume/util/hostutil"
"k8s.io/kubernetes/pkg/volume/util/subpath"
"k8s.io/utils/clock"
testingclock "k8s.io/utils/clock/testing"
)
func init() {
}
const (
testKubeletHostname = "127.0.0.1"
testKubeletHostIP = "127.0.0.1"
// 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.ImageService
images.ImageGCManager
}
func (f *fakeImageGCManager) GetImageList() ([]kubecontainer.Image, error) {
return f.fakeImageService.ListImages()
}
type TestKubelet struct {
kubelet *Kubelet
fakeRuntime *containertest.FakeRuntime
fakeContainerManager *cm.FakeContainerManager
fakeKubeClient *fake.Clientset
fakeMirrorClient *podtest.FakeMirrorClient
fakeClock *testingclock.FakeClock
mounter mount.Interface
volumePlugin *volumetest.FakeVolumePlugin
}
func (tk *TestKubelet) Cleanup() {
if tk.kubelet != nil {
os.RemoveAll(tk.kubelet.rootDirectory)
tk.kubelet = nil
}
}
// newTestKubelet returns test kubelet with two images.
func newTestKubelet(t *testing.T, controllerAttachDetachEnabled bool) *TestKubelet {
imageList := []kubecontainer.Image{
{
ID: "abc",
RepoTags: []string{"registry.k8s.io:v1", "registry.k8s.io:v2"},
Size: 123,
},
{
ID: "efg",
RepoTags: []string{"registry.k8s.io:v3", "registry.k8s.io:v4"},
Size: 456,
},
}
return newTestKubeletWithImageList(t, imageList, controllerAttachDetachEnabled, true /*initFakeVolumePlugin*/)
}
func newTestKubeletWithImageList(
t *testing.T,
imageList []kubecontainer.Image,
controllerAttachDetachEnabled bool,
initFakeVolumePlugin bool) *TestKubelet {
fakeRuntime := &containertest.FakeRuntime{
ImageList: imageList,
// Set ready conditions by default.
RuntimeStatus: &kubecontainer.RuntimeStatus{
Conditions: []kubecontainer.RuntimeCondition{
{Type: "RuntimeReady", Status: true},
{Type: "NetworkReady", Status: true},
},
},
VersionInfo: "1.5.0",
RuntimeType: "test",
T: t,
}
fakeRecorder := &record.FakeRecorder{}
fakeKubeClient := &fake.Clientset{}
kubelet := &Kubelet{}
kubelet.recorder = fakeRecorder
kubelet.kubeClient = fakeKubeClient
kubelet.heartbeatClient = fakeKubeClient
kubelet.os = &containertest.FakeOS{}
kubelet.mounter = mount.NewFakeMounter(nil)
kubelet.hostutil = hostutil.NewFakeHostUtil(nil)
kubelet.subpather = &subpath.FakeSubpath{}
kubelet.hostname = testKubeletHostname
kubelet.nodeName = types.NodeName(testKubeletHostname)
kubelet.runtimeState = newRuntimeState(maxWaitForContainerRuntime)
kubelet.runtimeState.setNetworkState(nil)
if tempDir, err := ioutil.TempDir("", "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 = metav1.NamespaceDefault
kubelet.serviceLister = testServiceLister{}
kubelet.serviceHasSynced = func() bool { return true }
kubelet.nodeHasSynced = func() bool { return true }
kubelet.nodeLister = testNodeLister{
nodes: []*v1.Node{
{
ObjectMeta: metav1.ObjectMeta{
Name: string(kubelet.nodeName),
},
Status: v1.NodeStatus{
Conditions: []v1.NodeCondition{
{
Type: v1.NodeReady,
Status: v1.ConditionTrue,
Reason: "Ready",
Message: "Node ready",
},
},
Addresses: []v1.NodeAddress{
{
Type: v1.NodeInternalIP,
Address: testKubeletHostIP,
},
},
VolumesAttached: []v1.AttachedVolume{
{
Name: "fake/fake-device",
DevicePath: "fake/path",
},
},
},
},
},
}
kubelet.recorder = fakeRecorder
if err := kubelet.setupDataDirs(); err != nil {
t.Fatalf("can't initialize kubelet data dirs: %v", err)
}
kubelet.daemonEndpoints = &v1.NodeDaemonEndpoints{}
kubelet.cadvisor = &cadvisortest.Fake{}
machineInfo, _ := kubelet.cadvisor.MachineInfo()
kubelet.setCachedMachineInfo(machineInfo)
fakeMirrorClient := podtest.NewFakeMirrorClient()
secretManager := secret.NewSimpleSecretManager(kubelet.kubeClient)
kubelet.secretManager = secretManager
configMapManager := configmap.NewSimpleConfigMapManager(kubelet.kubeClient)
kubelet.configMapManager = configMapManager
kubelet.podManager = kubepod.NewBasicPodManager(fakeMirrorClient, kubelet.secretManager, kubelet.configMapManager)
kubelet.statusManager = status.NewManager(fakeKubeClient, kubelet.podManager, &statustest.FakePodDeletionSafetyProvider{})
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.readinessManager = proberesults.NewManager()
kubelet.startupManager = proberesults.NewManager()
fakeContainerManager := cm.NewFakeContainerManager()
kubelet.containerManager = fakeContainerManager
fakeNodeRef := &v1.ObjectReference{
Kind: "Node",
Name: testKubeletHostname,
UID: types.UID(testKubeletHostname),
Namespace: "",
}
volumeStatsAggPeriod := time.Second * 10
kubelet.resourceAnalyzer = serverstats.NewResourceAnalyzer(kubelet, volumeStatsAggPeriod, kubelet.recorder)
fakeHostStatsProvider := stats.NewFakeHostStatsProvider()
kubelet.StatsProvider = stats.NewCadvisorStatsProvider(
kubelet.cadvisor,
kubelet.resourceAnalyzer,
kubelet.podManager,
kubelet.runtimeCache,
fakeRuntime,
kubelet.statusManager,
fakeHostStatsProvider,
)
fakeImageGCPolicy := images.ImageGCPolicy{
HighThresholdPercent: 90,
LowThresholdPercent: 80,
}
imageGCManager, err := images.NewImageGCManager(fakeRuntime, kubelet.StatsProvider, fakeRecorder, fakeNodeRef, fakeImageGCPolicy, "")
assert.NoError(t, err)
kubelet.imageManager = &fakeImageGCManager{
fakeImageService: fakeRuntime,
ImageGCManager: imageGCManager,
}
kubelet.containerLogManager = logs.NewStubContainerLogManager()
containerGCPolicy := kubecontainer.GCPolicy{
MinAge: time.Duration(0),
MaxPerPodContainer: 1,
MaxContainers: -1,
}
containerGC, err := kubecontainer.NewContainerGC(fakeRuntime, containerGCPolicy, kubelet.sourcesReady)
assert.NoError(t, err)
kubelet.containerGC = containerGC
fakeClock := testingclock.NewFakeClock(time.Now())
kubelet.backOff = flowcontrol.NewBackOff(time.Second, time.Minute)
kubelet.backOff.Clock = fakeClock
kubelet.resyncInterval = 10 * time.Second
kubelet.workQueue = queue.NewBasicWorkQueue(fakeClock)
// Relist period does not affect the tests.
kubelet.pleg = pleg.NewGenericPLEG(fakeRuntime, 100, time.Hour, kubelet.podCache, clock.RealClock{})
kubelet.clock = fakeClock
nodeRef := &v1.ObjectReference{
Kind: "Node",
Name: string(kubelet.nodeName),
UID: types.UID(kubelet.nodeName),
Namespace: "",
}
// setup eviction manager
evictionManager, evictionAdmitHandler := eviction.NewManager(kubelet.resourceAnalyzer, eviction.Config{}, killPodNow(kubelet.podWorkers, fakeRecorder), kubelet.podManager.GetMirrorPodByPod, kubelet.imageManager, kubelet.containerGC, fakeRecorder, nodeRef, kubelet.clock)
kubelet.evictionManager = evictionManager
kubelet.admitHandlers.AddPodAdmitHandler(evictionAdmitHandler)
// setup shutdown manager
shutdownManager, shutdownAdmitHandler := nodeshutdown.NewManager(&nodeshutdown.Config{
ProbeManager: kubelet.probeManager,
Recorder: fakeRecorder,
NodeRef: nodeRef,
GetPodsFunc: kubelet.podManager.GetPods,
KillPodFunc: killPodNow(kubelet.podWorkers, fakeRecorder),
SyncNodeStatusFunc: func() {},
ShutdownGracePeriodRequested: 0,
ShutdownGracePeriodCriticalPods: 0,
})
kubelet.shutdownManager = shutdownManager
kubelet.admitHandlers.AddPodAdmitHandler(shutdownAdmitHandler)
// Add this as cleanup predicate pod admitter
kubelet.admitHandlers.AddPodAdmitHandler(lifecycle.NewPredicateAdmitHandler(kubelet.getNodeAnyWay, lifecycle.NewAdmissionFailureHandlerStub(), kubelet.containerManager.UpdatePluginResources))
allPlugins := []volume.VolumePlugin{}
plug := &volumetest.FakeVolumePlugin{PluginName: "fake", Host: nil}
if initFakeVolumePlugin {
allPlugins = append(allPlugins, plug)
} else {
allPlugins = append(allPlugins, awsebs.ProbeVolumePlugins()...)
allPlugins = append(allPlugins, gcepd.ProbeVolumePlugins()...)
allPlugins = append(allPlugins, azuredd.ProbeVolumePlugins()...)
}
var prober volume.DynamicPluginProber // TODO (#51147) inject mock
kubelet.volumePluginMgr, err =
NewInitializedVolumePluginMgr(kubelet, kubelet.secretManager, kubelet.configMapManager, token.NewManager(kubelet.kubeClient), allPlugins, prober)
require.NoError(t, err, "Failed to initialize VolumePluginMgr")
kubelet.volumeManager = kubeletvolume.NewVolumeManager(
controllerAttachDetachEnabled,
kubelet.nodeName,
kubelet.podManager,
kubelet.podWorkers,
fakeKubeClient,
kubelet.volumePluginMgr,
fakeRuntime,
kubelet.mounter,
kubelet.hostutil,
kubelet.getPodsDir(),
kubelet.recorder,
false, /* keepTerminatedPodVolumes */
volumetest.NewBlockVolumePathHandler())
kubelet.pluginManager = pluginmanager.NewPluginManager(
kubelet.getPluginsRegistrationDir(), /* sockDir */
kubelet.recorder,
)
kubelet.setNodeStatusFuncs = kubelet.defaultNodeStatusFuncs()
// 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)
kubelet.lastContainerStartedTime = newTimeCache()
return &TestKubelet{kubelet, fakeRuntime, fakeContainerManager, fakeKubeClient, fakeMirrorClient, fakeClock, nil, plug}
}
func newTestPods(count int) []*v1.Pod {
pods := make([]*v1.Pod, count)
for i := 0; i < count; i++ {
pods[i] = &v1.Pod{
Spec: v1.PodSpec{
HostNetwork: true,
},
ObjectMeta: metav1.ObjectMeta{
UID: types.UID(strconv.Itoa(10000 + i)),
Name: fmt.Sprintf("pod%d", i),
},
}
}
return pods
}
func TestSyncLoopAbort(t *testing.T) {
testKubelet := newTestKubelet(t, false /* controllerAttachDetachEnabled */)
defer testKubelet.Cleanup()
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 */)
defer testKubelet.Cleanup()
kubelet := testKubelet.kubelet
fakeRuntime := testKubelet.fakeRuntime
pods := []*v1.Pod{
podWithUIDNameNsSpec("12345678", "foo", "new", v1.PodSpec{
Containers: []v1.Container{
{Name: "bar"},
},
}),
}
kubelet.podManager.SetPods(pods)
kubelet.HandlePodSyncs(pods)
fakeRuntime.AssertStartedPods([]string{string(pods[0].UID)})
}
func TestHandlePodCleanupsPerQOS(t *testing.T) {
testKubelet := newTestKubelet(t, false /* controllerAttachDetachEnabled */)
defer testKubelet.Cleanup()
pod := &kubecontainer.Pod{
ID: "12345678",
Name: "foo",
Namespace: "new",
Containers: []*kubecontainer.Container{
{Name: "bar"},
},
}
fakeRuntime := testKubelet.fakeRuntime
fakeContainerManager := testKubelet.fakeContainerManager
fakeContainerManager.PodContainerManager.AddPodFromCgroups(pod) // add pod to mock cgroup
fakeRuntime.PodList = []*containertest.FakePod{
{Pod: pod},
}
kubelet := testKubelet.kubelet
kubelet.cgroupsPerQOS = true // enable cgroupsPerQOS to turn on the cgroups cleanup
// HandlePodCleanups gets called every 2 seconds within the Kubelet's
// housekeeping routine. This test registers the pod, removes the unwanted pod, then calls into
// HandlePodCleanups a few more times. We should only see one Destroy() event. podKiller runs
// within a goroutine so a two second delay should be enough time to
// mark the pod as killed (within this test case).
kubelet.HandlePodCleanups()
// assert that unwanted pods were killed
if actual, expected := kubelet.podWorkers.(*fakePodWorkers).triggeredDeletion, []types.UID{"12345678"}; !reflect.DeepEqual(actual, expected) {
t.Fatalf("expected %v to be deleted, got %v", expected, actual)
}
fakeRuntime.AssertKilledPods([]string(nil))
// simulate Runtime.KillPod
fakeRuntime.PodList = nil
kubelet.HandlePodCleanups()
kubelet.HandlePodCleanups()
kubelet.HandlePodCleanups()
destroyCount := 0
err := wait.Poll(100*time.Millisecond, 10*time.Second, func() (bool, error) {
fakeContainerManager.PodContainerManager.Lock()
defer fakeContainerManager.PodContainerManager.Unlock()
destroyCount = 0
for _, functionName := range fakeContainerManager.PodContainerManager.CalledFunctions {
if functionName == "Destroy" {
destroyCount = destroyCount + 1
}
}
return destroyCount >= 1, nil
})
assert.NoError(t, err, "wait should not return error")
// housekeeping can get called multiple times. The cgroup Destroy() is
// done within a goroutine and can get called multiple times, so the
// Destroy() count in not deterministic on the actual number.
// https://github.com/kubernetes/kubernetes/blob/29fdbb065b5e0d195299eb2d260b975cbc554673/pkg/kubelet/kubelet_pods.go#L2006
assert.True(t, destroyCount >= 1, "Expect 1 or more destroys")
}
func TestDispatchWorkOfCompletedPod(t *testing.T) {
testKubelet := newTestKubelet(t, false /* controllerAttachDetachEnabled */)
defer testKubelet.Cleanup()
kubelet := testKubelet.kubelet
var got bool
kubelet.podWorkers = &fakePodWorkers{
syncPodFn: func(ctx context.Context, updateType kubetypes.SyncPodType, pod, mirrorPod *v1.Pod, podStatus *kubecontainer.PodStatus) (bool, error) {
got = true
return false, nil
},
cache: kubelet.podCache,
t: t,
}
now := metav1.NewTime(time.Now())
pods := []*v1.Pod{
{
ObjectMeta: metav1.ObjectMeta{
UID: "1",
Name: "completed-pod1",
Namespace: "ns",
Annotations: make(map[string]string),
},
Status: v1.PodStatus{
Phase: v1.PodFailed,
ContainerStatuses: []v1.ContainerStatus{
{
State: v1.ContainerState{
Terminated: &v1.ContainerStateTerminated{},
},
},
},
},
},
{
ObjectMeta: metav1.ObjectMeta{
UID: "2",
Name: "completed-pod2",
Namespace: "ns",
Annotations: make(map[string]string),
},
Status: v1.PodStatus{
Phase: v1.PodSucceeded,
ContainerStatuses: []v1.ContainerStatus{
{
State: v1.ContainerState{
Terminated: &v1.ContainerStateTerminated{},
},
},
},
},
},
{
ObjectMeta: metav1.ObjectMeta{
UID: "3",
Name: "completed-pod3",
Namespace: "ns",
Annotations: make(map[string]string),
DeletionTimestamp: &now,
},
Status: v1.PodStatus{
ContainerStatuses: []v1.ContainerStatus{
{
State: v1.ContainerState{
Terminated: &v1.ContainerStateTerminated{},
},
},
},
},
},
}
for _, pod := range pods {
kubelet.dispatchWork(pod, kubetypes.SyncPodSync, nil, time.Now())
if !got {
t.Errorf("Should not skip completed pod %q", pod.Name)
}
got = false
}
}
func TestDispatchWorkOfActivePod(t *testing.T) {
testKubelet := newTestKubelet(t, false /* controllerAttachDetachEnabled */)
defer testKubelet.Cleanup()
kubelet := testKubelet.kubelet
var got bool
kubelet.podWorkers = &fakePodWorkers{
syncPodFn: func(ctx context.Context, updateType kubetypes.SyncPodType, pod, mirrorPod *v1.Pod, podStatus *kubecontainer.PodStatus) (bool, error) {
got = true
return false, nil
},
cache: kubelet.podCache,
t: t,
}
pods := []*v1.Pod{
{
ObjectMeta: metav1.ObjectMeta{
UID: "1",
Name: "active-pod1",
Namespace: "ns",
Annotations: make(map[string]string),
},
Status: v1.PodStatus{
Phase: v1.PodRunning,
},
},
{
ObjectMeta: metav1.ObjectMeta{
UID: "2",
Name: "active-pod2",
Namespace: "ns",
Annotations: make(map[string]string),
},
Status: v1.PodStatus{
Phase: v1.PodFailed,
ContainerStatuses: []v1.ContainerStatus{
{
State: v1.ContainerState{
Running: &v1.ContainerStateRunning{},
},
},
},
},
},
}
for _, pod := range pods {
kubelet.dispatchWork(pod, kubetypes.SyncPodSync, nil, time.Now())
if !got {
t.Errorf("Should not skip active pod %q", pod.Name)
}
got = false
}
}
func TestHandlePodCleanups(t *testing.T) {
testKubelet := newTestKubelet(t, false /* controllerAttachDetachEnabled */)
defer testKubelet.Cleanup()
pod := &kubecontainer.Pod{
ID: "12345678",
Name: "foo",
Namespace: "new",
Containers: []*kubecontainer.Container{
{Name: "bar"},
},
}
fakeRuntime := testKubelet.fakeRuntime
fakeRuntime.PodList = []*containertest.FakePod{
{Pod: pod},
}
kubelet := testKubelet.kubelet
kubelet.HandlePodCleanups()
// assert that unwanted pods were queued to kill
if actual, expected := kubelet.podWorkers.(*fakePodWorkers).triggeredDeletion, []types.UID{"12345678"}; !reflect.DeepEqual(actual, expected) {
t.Fatalf("expected %v to be deleted, got %v", expected, actual)
}
fakeRuntime.AssertKilledPods([]string(nil))
}
func TestHandlePodRemovesWhenSourcesAreReady(t *testing.T) {
ready := false
testKubelet := newTestKubelet(t, false /* controllerAttachDetachEnabled */)
defer testKubelet.Cleanup()
fakePod := &kubecontainer.Pod{
ID: "1",
Name: "foo",
Namespace: "new",
Containers: []*kubecontainer.Container{
{Name: "bar"},
},
}
pods := []*v1.Pod{
podWithUIDNameNs("1", "foo", "new"),
}
fakeRuntime := testKubelet.fakeRuntime
fakeRuntime.PodList = []*containertest.FakePod{
{Pod: fakePod},
}
kubelet := testKubelet.kubelet
kubelet.sourcesReady = config.NewSourcesReady(func(_ sets.String) bool { return ready })
kubelet.HandlePodRemoves(pods)
time.Sleep(2 * time.Second)
// Sources are not ready yet. Don't remove any pods.
if expect, actual := []types.UID(nil), kubelet.podWorkers.(*fakePodWorkers).triggeredDeletion; !reflect.DeepEqual(expect, actual) {
t.Fatalf("expected %v kills, got %v", expect, actual)
}
ready = true
kubelet.HandlePodRemoves(pods)
time.Sleep(2 * time.Second)
// Sources are ready. Remove unwanted pods.
if expect, actual := []types.UID{"1"}, kubelet.podWorkers.(*fakePodWorkers).triggeredDeletion; !reflect.DeepEqual(expect, actual) {
t.Fatalf("expected %v kills, got %v", expect, actual)
}
}
type testNodeLister struct {
nodes []*v1.Node
}
func (nl testNodeLister) Get(name string) (*v1.Node, error) {
for _, node := range nl.nodes {
if node.Name == name {
return node, nil
}
}
return nil, fmt.Errorf("Node with name: %s does not exist", name)
}
func (nl testNodeLister) List(_ labels.Selector) (ret []*v1.Node, err error) {
return nl.nodes, nil
}
func checkPodStatus(t *testing.T, kl *Kubelet, pod *v1.Pod, phase v1.PodPhase) {
t.Helper()
status, found := kl.statusManager.GetPodStatus(pod.UID)
require.True(t, found, "Status of pod %q is not found in the status map", pod.UID)
require.Equal(t, phase, status.Phase)
}
// Tests that we handle port conflicts correctly by setting the failed status in status map.
func TestHandlePortConflicts(t *testing.T) {
testKubelet := newTestKubelet(t, false /* controllerAttachDetachEnabled */)
defer testKubelet.Cleanup()
kl := testKubelet.kubelet
kl.nodeLister = testNodeLister{nodes: []*v1.Node{
{
ObjectMeta: metav1.ObjectMeta{Name: string(kl.nodeName)},
Status: v1.NodeStatus{
Allocatable: v1.ResourceList{
v1.ResourcePods: *resource.NewQuantity(110, resource.DecimalSI),
},
},
},
}}
recorder := record.NewFakeRecorder(20)
nodeRef := &v1.ObjectReference{
Kind: "Node",
Name: "testNode",
UID: types.UID("testNode"),
Namespace: "",
}
testClusterDNSDomain := "TEST"
kl.dnsConfigurer = dns.NewConfigurer(recorder, nodeRef, nil, nil, testClusterDNSDomain, "")
spec := v1.PodSpec{NodeName: string(kl.nodeName), Containers: []v1.Container{{Ports: []v1.ContainerPort{{HostPort: 80}}}}}
pods := []*v1.Pod{
podWithUIDNameNsSpec("123456789", "newpod", "foo", spec),
podWithUIDNameNsSpec("987654321", "oldpod", "foo", spec),
}
// Make sure the Pods are in the reverse order of creation time.
pods[1].CreationTimestamp = metav1.NewTime(time.Now())
pods[0].CreationTimestamp = metav1.NewTime(time.Now().Add(1 * time.Second))
// The newer pod should be rejected.
notfittingPod := pods[0]
fittingPod := pods[1]
kl.podWorkers.(*fakePodWorkers).running = map[types.UID]bool{
pods[0].UID: true,
pods[1].UID: true,
}
kl.HandlePodAdditions(pods)
// Check pod status stored in the status map.
checkPodStatus(t, kl, notfittingPod, v1.PodFailed)
checkPodStatus(t, kl, fittingPod, v1.PodPending)
}
// Tests that we handle host name conflicts correctly by setting the failed status in status map.
func TestHandleHostNameConflicts(t *testing.T) {
testKubelet := newTestKubelet(t, false /* controllerAttachDetachEnabled */)
defer testKubelet.Cleanup()
kl := testKubelet.kubelet
kl.nodeLister = testNodeLister{nodes: []*v1.Node{
{
ObjectMeta: metav1.ObjectMeta{Name: "127.0.0.1"},
Status: v1.NodeStatus{
Allocatable: v1.ResourceList{
v1.ResourcePods: *resource.NewQuantity(110, resource.DecimalSI),
},
},
},
}}
recorder := record.NewFakeRecorder(20)
nodeRef := &v1.ObjectReference{
Kind: "Node",
Name: "testNode",
UID: types.UID("testNode"),
Namespace: "",
}
testClusterDNSDomain := "TEST"
kl.dnsConfigurer = dns.NewConfigurer(recorder, nodeRef, nil, nil, testClusterDNSDomain, "")
// default NodeName in test is 127.0.0.1
pods := []*v1.Pod{
podWithUIDNameNsSpec("123456789", "notfittingpod", "foo", v1.PodSpec{NodeName: "127.0.0.2"}),
podWithUIDNameNsSpec("987654321", "fittingpod", "foo", v1.PodSpec{NodeName: "127.0.0.1"}),
}
notfittingPod := pods[0]
fittingPod := pods[1]
kl.HandlePodAdditions(pods)
// Check pod status stored in the status map.
checkPodStatus(t, kl, notfittingPod, v1.PodFailed)
checkPodStatus(t, kl, fittingPod, v1.PodPending)
}
// Tests that we handle not matching labels selector correctly by setting the failed status in status map.
func TestHandleNodeSelector(t *testing.T) {
testKubelet := newTestKubelet(t, false /* controllerAttachDetachEnabled */)
defer testKubelet.Cleanup()
kl := testKubelet.kubelet
nodes := []*v1.Node{
{
ObjectMeta: metav1.ObjectMeta{Name: testKubeletHostname, Labels: map[string]string{"key": "B"}},
Status: v1.NodeStatus{
Allocatable: v1.ResourceList{
v1.ResourcePods: *resource.NewQuantity(110, resource.DecimalSI),
},
},
},
}
kl.nodeLister = testNodeLister{nodes: nodes}
recorder := record.NewFakeRecorder(20)
nodeRef := &v1.ObjectReference{
Kind: "Node",
Name: "testNode",
UID: types.UID("testNode"),
Namespace: "",
}
testClusterDNSDomain := "TEST"
kl.dnsConfigurer = dns.NewConfigurer(recorder, nodeRef, nil, nil, testClusterDNSDomain, "")
pods := []*v1.Pod{
podWithUIDNameNsSpec("123456789", "podA", "foo", v1.PodSpec{NodeSelector: map[string]string{"key": "A"}}),
podWithUIDNameNsSpec("987654321", "podB", "foo", v1.PodSpec{NodeSelector: map[string]string{"key": "B"}}),
}
// The first pod should be rejected.
notfittingPod := pods[0]
fittingPod := pods[1]
kl.HandlePodAdditions(pods)
// Check pod status stored in the status map.
checkPodStatus(t, kl, notfittingPod, v1.PodFailed)
checkPodStatus(t, kl, fittingPod, v1.PodPending)
}
// Tests that we handle not matching labels selector correctly by setting the failed status in status map.
func TestHandleNodeSelectorBasedOnOS(t *testing.T) {
tests := []struct {
name string
nodeLabels map[string]string
podSelector map[string]string
podStatus v1.PodPhase
}{
{
name: "correct OS label, wrong pod selector, admission denied",
nodeLabels: map[string]string{v1.LabelOSStable: goruntime.GOOS, v1.LabelArchStable: goruntime.GOARCH},
podSelector: map[string]string{v1.LabelOSStable: "dummyOS"},
podStatus: v1.PodFailed,
},
{
name: "correct OS label, correct pod selector, admission denied",
nodeLabels: map[string]string{v1.LabelOSStable: goruntime.GOOS, v1.LabelArchStable: goruntime.GOARCH},
podSelector: map[string]string{v1.LabelOSStable: goruntime.GOOS},
podStatus: v1.PodPending,
},
{
// Expect no patching to happen, label B should be preserved and can be used for nodeAffinity.
name: "new node label, correct pod selector, admitted",
nodeLabels: map[string]string{v1.LabelOSStable: goruntime.GOOS, v1.LabelArchStable: goruntime.GOARCH, "key": "B"},
podSelector: map[string]string{"key": "B"},
podStatus: v1.PodPending,
},
}
for _, test := range tests {
t.Run(test.name, func(t *testing.T) {
testKubelet := newTestKubelet(t, false /* controllerAttachDetachEnabled */)
defer testKubelet.Cleanup()
kl := testKubelet.kubelet
nodes := []*v1.Node{
{
ObjectMeta: metav1.ObjectMeta{Name: testKubeletHostname, Labels: test.nodeLabels},
Status: v1.NodeStatus{
Allocatable: v1.ResourceList{
v1.ResourcePods: *resource.NewQuantity(110, resource.DecimalSI),
},
},
},
}
kl.nodeLister = testNodeLister{nodes: nodes}
recorder := record.NewFakeRecorder(20)
nodeRef := &v1.ObjectReference{
Kind: "Node",
Name: "testNode",
UID: types.UID("testNode"),
Namespace: "",
}
testClusterDNSDomain := "TEST"
kl.dnsConfigurer = dns.NewConfigurer(recorder, nodeRef, nil, nil, testClusterDNSDomain, "")
pod := podWithUIDNameNsSpec("123456789", "podA", "foo", v1.PodSpec{NodeSelector: test.podSelector})
kl.HandlePodAdditions([]*v1.Pod{pod})
// Check pod status stored in the status map.
checkPodStatus(t, kl, pod, test.podStatus)
})
}
}
// Tests that we handle exceeded resources correctly by setting the failed status in status map.
func TestHandleMemExceeded(t *testing.T) {
testKubelet := newTestKubelet(t, false /* controllerAttachDetachEnabled */)
defer testKubelet.Cleanup()
kl := testKubelet.kubelet
nodes := []*v1.Node{
{ObjectMeta: metav1.ObjectMeta{Name: testKubeletHostname},
Status: v1.NodeStatus{Capacity: v1.ResourceList{}, Allocatable: v1.ResourceList{
v1.ResourceCPU: *resource.NewMilliQuantity(10, resource.DecimalSI),
v1.ResourceMemory: *resource.NewQuantity(100, resource.BinarySI),
v1.ResourcePods: *resource.NewQuantity(40, resource.DecimalSI),
}}},
}
kl.nodeLister = testNodeLister{nodes: nodes}
recorder := record.NewFakeRecorder(20)
nodeRef := &v1.ObjectReference{
Kind: "Node",
Name: "testNode",
UID: types.UID("testNode"),
Namespace: "",
}
testClusterDNSDomain := "TEST"
kl.dnsConfigurer = dns.NewConfigurer(recorder, nodeRef, nil, nil, testClusterDNSDomain, "")
spec := v1.PodSpec{NodeName: string(kl.nodeName),
Containers: []v1.Container{{Resources: v1.ResourceRequirements{
Requests: v1.ResourceList{
v1.ResourceMemory: resource.MustParse("90"),
},
}}},
}
pods := []*v1.Pod{
podWithUIDNameNsSpec("123456789", "newpod", "foo", spec),
podWithUIDNameNsSpec("987654321", "oldpod", "foo", spec),
}
// Make sure the Pods are in the reverse order of creation time.
pods[1].CreationTimestamp = metav1.NewTime(time.Now())
pods[0].CreationTimestamp = metav1.NewTime(time.Now().Add(1 * time.Second))
// The newer pod should be rejected.
notfittingPod := pods[0]
fittingPod := pods[1]
kl.podWorkers.(*fakePodWorkers).running = map[types.UID]bool{
pods[0].UID: true,
pods[1].UID: true,
}
kl.HandlePodAdditions(pods)
// Check pod status stored in the status map.
checkPodStatus(t, kl, notfittingPod, v1.PodFailed)
checkPodStatus(t, kl, fittingPod, v1.PodPending)
}
// Tests that we handle result of interface UpdatePluginResources correctly
// by setting corresponding status in status map.
func TestHandlePluginResources(t *testing.T) {
testKubelet := newTestKubelet(t, false /* controllerAttachDetachEnabled */)
defer testKubelet.Cleanup()
kl := testKubelet.kubelet
adjustedResource := v1.ResourceName("domain1.com/adjustedResource")
emptyResource := v1.ResourceName("domain2.com/emptyResource")
missingResource := v1.ResourceName("domain2.com/missingResource")
failedResource := v1.ResourceName("domain2.com/failedResource")
resourceQuantity0 := *resource.NewQuantity(int64(0), resource.DecimalSI)
resourceQuantity1 := *resource.NewQuantity(int64(1), resource.DecimalSI)
resourceQuantity2 := *resource.NewQuantity(int64(2), resource.DecimalSI)
resourceQuantityInvalid := *resource.NewQuantity(int64(-1), resource.DecimalSI)
allowedPodQuantity := *resource.NewQuantity(int64(10), resource.DecimalSI)