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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 (
"fmt"
"io/ioutil"
"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/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/clock"
utilruntime "k8s.io/apimachinery/pkg/util/runtime"
"k8s.io/apimachinery/pkg/util/sets"
"k8s.io/apimachinery/pkg/util/wait"
clientv1 "k8s.io/client-go/pkg/api/v1"
"k8s.io/client-go/tools/record"
"k8s.io/client-go/util/flowcontrol"
"k8s.io/kubernetes/pkg/api/v1"
"k8s.io/kubernetes/pkg/apis/componentconfig"
"k8s.io/kubernetes/pkg/capabilities"
"k8s.io/kubernetes/pkg/client/clientset_generated/clientset/fake"
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/gpu"
"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/secret"
"k8s.io/kubernetes/pkg/kubelet/server/stats"
"k8s.io/kubernetes/pkg/kubelet/status"
statustest "k8s.io/kubernetes/pkg/kubelet/status/testing"
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/util/mount"
"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"
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
fakeCadvisor *cadvisortest.Mock
fakeKubeClient *fake.Clientset
fakeMirrorClient *podtest.FakeMirrorClient
fakeClock *clock.FakeClock
mounter mount.Interface
volumePlugin *volumetest.FakeVolumePlugin
}
func (tk *TestKubelet) Cleanup() {
if tk.kubelet != nil {
os.RemoveAll(tk.kubelet.rootDirectory)
}
}
// 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
// Set ready conditions by default.
fakeRuntime.RuntimeStatus = &kubecontainer.RuntimeStatus{
Conditions: []kubecontainer.RuntimeCondition{
{Type: "RuntimeReady", Status: true},
{Type: "NetworkReady", Status: true},
},
}
fakeRecorder := &record.FakeRecorder{}
fakeKubeClient := &fake.Clientset{}
kubelet := &Kubelet{}
kubelet.recorder = fakeRecorder
kubelet.kubeClient = fakeKubeClient
kubelet.os = &containertest.FakeOS{}
kubelet.hostname = testKubeletHostname
kubelet.nodeName = types.NodeName(testKubeletHostname)
kubelet.runtimeState = newRuntimeState(maxWaitForContainerRuntime)
kubelet.runtimeState.setNetworkState(nil)
kubelet.networkPlugin, _ = network.InitNetworkPlugin([]network.NetworkPlugin{}, "", nettest.NewFakeHost(nil), componentconfig.HairpinNone, "", 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 = metav1.NamespaceDefault
kubelet.serviceLister = testServiceLister{}
kubelet.nodeInfo = testNodeInfo{
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,
},
},
},
},
},
}
kubelet.recorder = fakeRecorder
if err := kubelet.setupDataDirs(); err != nil {
t.Fatalf("can't initialize kubelet data dirs: %v", err)
}
kubelet.daemonEndpoints = &v1.NodeDaemonEndpoints{}
mockCadvisor := &cadvisortest.Mock{}
kubelet.cadvisor = mockCadvisor
fakeMirrorClient := podtest.NewFakeMirrorClient()
secretManager := secret.NewSimpleSecretManager(kubelet.kubeClient)
kubelet.secretManager = secretManager
kubelet.podManager = kubepod.NewBasicPodManager(fakeMirrorClient, kubelet.secretManager)
kubelet.statusManager = status.NewManager(fakeKubeClient, kubelet.podManager, &statustest.FakePodDeletionSafetyProvider{})
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 := &clientv1.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.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 := &clientv1.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.imageManager, fakeRecorder, nodeRef, kubelet.clock)
kubelet.evictionManager = evictionManager
kubelet.admitHandlers.AddPodAdmitHandler(evictionAdmitHandler)
// Add this as cleanup predicate pod admitter
kubelet.admitHandlers.AddPodAdmitHandler(lifecycle.NewPredicateAdmitHandler(kubelet.getNodeAnyWay, lifecycle.NewAdmissionFailureHandlerStub()))
plug := &volumetest.FakeVolumePlugin{PluginName: "fake", Host: nil}
kubelet.volumePluginMgr, err =
NewInitializedVolumePluginMgr(kubelet, kubelet.secretManager, []volume.VolumePlugin{plug})
require.NoError(t, err, "Failed to initialize VolumePluginMgr")
kubelet.mounter = &mount.FakeMounter{}
kubelet.volumeManager, err = kubeletvolume.NewVolumeManager(
controllerAttachDetachEnabled,
kubelet.nodeName,
kubelet.podManager,
kubelet.statusManager,
fakeKubeClient,
kubelet.volumePluginMgr,
fakeRuntime,
kubelet.mounter,
kubelet.getPodsDir(),
kubelet.recorder,
false, /* experimentalCheckNodeCapabilitiesBeforeMount*/
false /* keepTerminatedPodVolumes */)
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)
kubelet.gpuManager = gpu.NewGPUManagerStub()
return &TestKubelet{kubelet, fakeRuntime, mockCadvisor, 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(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 */)
defer testKubelet.Cleanup()
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 */)
defer testKubelet.Cleanup()
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 */)
defer testKubelet.Cleanup()
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 := []*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 TestSyncPodsDeletesWhenSourcesAreReady(t *testing.T) {
ready := false
testKubelet := newTestKubelet(t, false /* controllerAttachDetachEnabled */)
defer testKubelet.Cleanup()
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"})
}
type testNodeLister struct {
nodes []*v1.Node
}
type testNodeInfo struct {
nodes []*v1.Node
}
func (ls testNodeInfo) GetNodeInfo(id string) (*v1.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(selector labels.Selector) ([]*v1.Node, error) {
return ls.nodes, nil
}
// 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
testKubelet.fakeCadvisor.On("MachineInfo").Return(&cadvisorapi.MachineInfo{}, nil)
testKubelet.fakeCadvisor.On("ImagesFsInfo").Return(cadvisorapiv2.FsInfo{}, nil)
testKubelet.fakeCadvisor.On("RootFsInfo").Return(cadvisorapiv2.FsInfo{}, nil)
kl.nodeInfo = testNodeInfo{nodes: []*v1.Node{
{
ObjectMeta: metav1.ObjectMeta{Name: string(kl.nodeName)},
Status: v1.NodeStatus{
Allocatable: v1.ResourceList{
v1.ResourcePods: *resource.NewQuantity(110, resource.DecimalSI),
},
},
},
}}
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.HandlePodAdditions(pods)
// Check pod status stored in the status map.
// notfittingPod should be Failed
status, found := kl.statusManager.GetPodStatus(notfittingPod.UID)
require.True(t, found, "Status of pod %q is not found in the status map", notfittingPod.UID)
require.Equal(t, v1.PodFailed, status.Phase)
// fittingPod should be Pending
status, found = kl.statusManager.GetPodStatus(fittingPod.UID)
require.True(t, found, "Status of pod %q is not found in the status map", fittingPod.UID)
require.Equal(t, v1.PodPending, status.Phase)
}
// 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
testKubelet.fakeCadvisor.On("MachineInfo").Return(&cadvisorapi.MachineInfo{}, nil)
testKubelet.fakeCadvisor.On("ImagesFsInfo").Return(cadvisorapiv2.FsInfo{}, nil)
testKubelet.fakeCadvisor.On("RootFsInfo").Return(cadvisorapiv2.FsInfo{}, nil)
kl.nodeInfo = testNodeInfo{nodes: []*v1.Node{
{
ObjectMeta: metav1.ObjectMeta{Name: "127.0.0.1"},
Status: v1.NodeStatus{
Allocatable: v1.ResourceList{
v1.ResourcePods: *resource.NewQuantity(110, resource.DecimalSI),
},
},
},
}}
// 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.
// notfittingPod should be Failed
status, found := kl.statusManager.GetPodStatus(notfittingPod.UID)
require.True(t, found, "Status of pod %q is not found in the status map", notfittingPod.UID)
require.Equal(t, v1.PodFailed, status.Phase)
// fittingPod should be Pending
status, found = kl.statusManager.GetPodStatus(fittingPod.UID)
require.True(t, found, "Status of pod %q is not found in the status map", fittingPod.UID)
require.Equal(t, v1.PodPending, status.Phase)
}
// 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.nodeInfo = testNodeInfo{nodes: nodes}
testKubelet.fakeCadvisor.On("MachineInfo").Return(&cadvisorapi.MachineInfo{}, nil)
testKubelet.fakeCadvisor.On("ImagesFsInfo").Return(cadvisorapiv2.FsInfo{}, nil)
testKubelet.fakeCadvisor.On("RootFsInfo").Return(cadvisorapiv2.FsInfo{}, nil)
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.
// notfittingPod should be Failed
status, found := kl.statusManager.GetPodStatus(notfittingPod.UID)
require.True(t, found, "Status of pod %q is not found in the status map", notfittingPod.UID)
require.Equal(t, v1.PodFailed, status.Phase)
// fittingPod should be Pending
status, found = kl.statusManager.GetPodStatus(fittingPod.UID)
require.True(t, found, "Status of pod %q is not found in the status map", fittingPod.UID)
require.Equal(t, v1.PodPending, status.Phase)
}
// 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.nodeInfo = testNodeInfo{nodes: nodes}
testKubelet.fakeCadvisor.On("MachineInfo").Return(&cadvisorapi.MachineInfo{}, nil)
testKubelet.fakeCadvisor.On("ImagesFsInfo").Return(cadvisorapiv2.FsInfo{}, nil)
testKubelet.fakeCadvisor.On("RootFsInfo").Return(cadvisorapiv2.FsInfo{}, nil)
spec := v1.PodSpec{NodeName: string(kl.nodeName),
Containers: []v1.Container{{Resources: v1.ResourceRequirements{
Requests: v1.ResourceList{
"memory": 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.HandlePodAdditions(pods)
// Check pod status stored in the status map.
// notfittingPod should be Failed
status, found := kl.statusManager.GetPodStatus(notfittingPod.UID)
require.True(t, found, "Status of pod %q is not found in the status map", notfittingPod.UID)
require.Equal(t, v1.PodFailed, status.Phase)
// fittingPod should be Pending
status, found = kl.statusManager.GetPodStatus(fittingPod.UID)
require.True(t, found, "Status of pod %q is not found in the status map", fittingPod.UID)
require.Equal(t, v1.PodPending, status.Phase)
}
// TODO(filipg): This test should be removed once StatusSyncer can do garbage collection without external signal.
func TestPurgingObsoleteStatusMapEntries(t *testing.T) {
testKubelet := newTestKubelet(t, false /* controllerAttachDetachEnabled */)
defer testKubelet.Cleanup()
testKubelet.fakeCadvisor.On("MachineInfo").Return(&cadvisorapi.MachineInfo{}, nil)
testKubelet.fakeCadvisor.On("ImagesFsInfo").Return(cadvisorapiv2.FsInfo{}, nil)
testKubelet.fakeCadvisor.On("RootFsInfo").Return(cadvisorapiv2.FsInfo{}, nil)
versionInfo := &cadvisorapi.VersionInfo{
KernelVersion: "3.16.0-0.bpo.4-amd64",
ContainerOsVersion: "Debian GNU/Linux 7 (wheezy)",
DockerVersion: "1.5.0",
}
testKubelet.fakeCadvisor.On("VersionInfo").Return(versionInfo, nil)
kl := testKubelet.kubelet
pods := []*v1.Pod{
{ObjectMeta: metav1.ObjectMeta{Name: "pod1", UID: "1234"}, Spec: v1.PodSpec{Containers: []v1.Container{{Ports: []v1.ContainerPort{{HostPort: 80}}}}}},
{ObjectMeta: metav1.ObjectMeta{Name: "pod2", UID: "4567"}, Spec: v1.PodSpec{Containers: []v1.Container{{Ports: []v1.ContainerPort{{HostPort: 80}}}}}},
}
podToTest := pods[1]
// Run once to populate the status map.
kl.HandlePodAdditions(pods)
if _, found := kl.statusManager.GetPodStatus(podToTest.UID); !found {
t.Fatalf("expected to have status cached for pod2")
}
// Sync with empty pods so that the entry in status map will be removed.
kl.podManager.SetPods([]*v1.Pod{})
kl.HandlePodCleanups()
if _, found := kl.statusManager.GetPodStatus(podToTest.UID); found {
t.Fatalf("expected to not have status cached for pod2")
}
}
func TestValidateContainerLogStatus(t *testing.T) {
testKubelet := newTestKubelet(t, false /* controllerAttachDetachEnabled */)
defer testKubelet.Cleanup()
kubelet := testKubelet.kubelet
containerName := "x"
testCases := []struct {
statuses []v1.ContainerStatus
success bool // whether getting logs for the container should succeed.
pSuccess bool // whether getting logs for the previous container should succeed.
}{
{
statuses: []v1.ContainerStatus{
{
Name: containerName,
State: v1.ContainerState{
Running: &v1.ContainerStateRunning{},
},
LastTerminationState: v1.ContainerState{
Terminated: &v1.ContainerStateTerminated{},
},
},
},
success: true,
pSuccess: true,
},
{
statuses: []v1.ContainerStatus{
{
Name: containerName,
State: v1.ContainerState{
Running: &v1.ContainerStateRunning{},
},
},
},
success: true,
pSuccess: false,
},
{
statuses: []v1.ContainerStatus{
{
Name: containerName,
State: v1.ContainerState{
Terminated: &v1.ContainerStateTerminated{},
},
},
},
success: true,
pSuccess: false,
},
{
statuses: []v1.ContainerStatus{
{
Name: containerName,
State: v1.ContainerState{
Waiting: &v1.ContainerStateWaiting{},
},
},
},
success: false,
pSuccess: false,
},
{
statuses: []v1.ContainerStatus{
{
Name: containerName,
State: v1.ContainerState{Waiting: &v1.ContainerStateWaiting{Reason: "ErrImagePull"}},
},
},
success: false,
pSuccess: false,
},
{
statuses: []v1.ContainerStatus{
{
Name: containerName,
State: v1.ContainerState{Waiting: &v1.ContainerStateWaiting{Reason: "ErrImagePullBackOff"}},
},
},
success: false,
pSuccess: false,
},
}
for i, tc := range testCases {
// Access the log of the most recent container
previous := false
podStatus := &v1.PodStatus{ContainerStatuses: tc.statuses}
_, err := kubelet.validateContainerLogStatus("podName", podStatus, containerName, previous)
if !tc.success {
assert.Error(t, err, fmt.Sprintf("[case %d] error", i))
} else {
assert.NoError(t, err, "[case %d] error", i)
}
// Access the log of the previous, terminated container
previous = true
_, err = kubelet.validateContainerLogStatus("podName", podStatus, containerName, previous)
if !tc.pSuccess {
assert.Error(t, err, fmt.Sprintf("[case %d] error", i))
} else {
assert.NoError(t, err, "[case %d] error", i)
}
// Access the log of a container that's not in the pod
_, err = kubelet.validateContainerLogStatus("podName", podStatus, "blah", false)
assert.Error(t, err, fmt.Sprintf("[case %d] invalid container name should cause an error", i))
}
}
// updateDiskSpacePolicy creates a new DiskSpaceManager with a new policy. This new manager along
// with the mock FsInfo values added to Cadvisor should make the kubelet report that it has
// sufficient disk space or it is out of disk, depending on the capacity, availability and
// threshold values.
func updateDiskSpacePolicy(kubelet *Kubelet, mockCadvisor *cadvisortest.Mock, rootCap, dockerCap, rootAvail, dockerAvail uint64, rootThreshold, dockerThreshold int) error {
dockerimagesFsInfo := cadvisorapiv2.FsInfo{Capacity: rootCap * mb, Available: rootAvail * mb}
rootFsInfo := cadvisorapiv2.FsInfo{Capacity: dockerCap * mb, Available: dockerAvail * mb}
mockCadvisor.On("ImagesFsInfo").Return(dockerimagesFsInfo, nil)
mockCadvisor.On("RootFsInfo").Return(rootFsInfo, nil)
dsp := DiskSpacePolicy{DockerFreeDiskMB: rootThreshold, RootFreeDiskMB: dockerThreshold}
diskSpaceManager, err := newDiskSpaceManager(mockCadvisor, dsp)
if err != nil {
return err
}
kubelet.diskSpaceManager = diskSpaceManager
return nil
}
func TestCreateMirrorPod(t *testing.T) {
for _, updateType := range []kubetypes.SyncPodType{kubetypes.SyncPodCreate, kubetypes.SyncPodUpdate} {
testKubelet := newTestKubelet(t, false /* controllerAttachDetachEnabled */)
defer testKubelet.Cleanup()
testKubelet.fakeCadvisor.On("Start").Return(nil)
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)
kl := testKubelet.kubelet
manager := testKubelet.fakeMirrorClient
pod := podWithUidNameNs("12345678", "bar", "foo")
pod.Annotations[kubetypes.ConfigSourceAnnotationKey] = "file"
pods := []*v1.Pod{pod}
kl.podManager.SetPods(pods)
err := kl.syncPod(syncPodOptions{
pod: pod,
podStatus: &kubecontainer.PodStatus{},
updateType: updateType,
})
assert.NoError(t, err)
podFullName := kubecontainer.GetPodFullName(pod)
assert.True(t, manager.HasPod(podFullName), "Expected mirror pod %q to be created", podFullName)
assert.Equal(t, 1, manager.NumOfPods(), "Expected only 1 mirror pod %q, got %+v", podFullName, manager.GetPods())
}
}
func TestDeleteOutdatedMirrorPod(t *testing.T) {
testKubelet := newTestKubelet(t, false /* controllerAttachDetachEnabled */)
defer testKubelet.Cleanup()
testKubelet.fakeCadvisor.On("Start").Return(nil)
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)
kl := testKubelet.kubelet
manager := testKubelet.fakeMirrorClient
pod := podWithUidNameNsSpec("12345678", "foo", "ns", v1.PodSpec{
Containers: []v1.Container{
{Name: "1234", Image: "foo"},
},
})
pod.Annotations[kubetypes.ConfigSourceAnnotationKey] = "file"
// Mirror pod has an outdated spec.
mirrorPod := podWithUidNameNsSpec("11111111", "foo", "ns", v1.PodSpec{
Containers: []v1.Container{
{Name: "1234", Image: "bar"},
},
})
mirrorPod.Annotations[kubetypes.ConfigSourceAnnotationKey] = "api"
mirrorPod.Annotations[kubetypes.ConfigMirrorAnnotationKey] = "mirror"
pods := []*v1.Pod{pod, mirrorPod}
kl.podManager.SetPods(pods)
err := kl.syncPod(syncPodOptions{
pod: pod,
mirrorPod: mirrorPod,
podStatus: &kubecontainer.PodStatus{},
updateType: kubetypes.SyncPodUpdate,
})
assert.NoError(t, err)
name := kubecontainer.GetPodFullName(pod)
creates, deletes := manager.GetCounts(name)
if creates != 1 || deletes != 1 {
t.Errorf("expected 1 creation and 1 deletion of %q, got %d, %d", name, creates, deletes)
}
}
func TestDeleteOrphanedMirrorPods(t *testing.T) {
testKubelet := newTestKubelet(t, false /* controllerAttachDetachEnabled */)
defer testKubelet.Cleanup()
testKubelet.fakeCadvisor.On("Start").Return(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)
kl := testKubelet.kubelet
manager := testKubelet.fakeMirrorClient
orphanPods := []*v1.Pod{
{
ObjectMeta: metav1.ObjectMeta{
UID: "12345678",
Name: "pod1",
Namespace: "ns",
Annotations: map[string]string{
kubetypes.ConfigSourceAnnotationKey: "api",
kubetypes.ConfigMirrorAnnotationKey: "mirror",
},
},
},
{
ObjectMeta: metav1.ObjectMeta{
UID: "12345679",
Name: "pod2",
Namespace: "ns",
Annotations: map[string]string{
kubetypes.ConfigSourceAnnotationKey: "api",
kubetypes.ConfigMirrorAnnotationKey: "mirror",
},
},
},
}
kl.podManager.SetPods(orphanPods)
// Sync with an empty pod list to delete all mirror pods.
kl.HandlePodCleanups()
assert.Len(t, manager.GetPods(), 0, "Expected 0 mirror pods")
for _, pod := range orphanPods {
name := kubecontainer.GetPodFullName(pod)
creates, deletes := manager.GetCounts(name)
if creates != 0 || deletes != 1 {
t.Errorf("expected 0 creation and one deletion of %q, got %d, %d", name, creates, deletes)
}
}
}
func TestGetContainerInfoForMirrorPods(t *testing.T) {
// pods contain one static and one mirror pod with the same name but
// different UIDs.
pods := []*v1.Pod{
{
ObjectMeta: metav1.ObjectMeta{
UID: "1234",
Name: "qux",
Namespace: "ns",
Annotations: map[string]string{
kubetypes.ConfigSourceAnnotationKey: "file",
},
},
Spec: v1.PodSpec{
Containers: []v1.Container{
{Name: "foo"},
},
},
},
{
ObjectMeta: metav1.ObjectMeta{
UID: "5678",
Name: "qux",
Namespace: "ns",
Annotations: map[string]string{
kubetypes.ConfigSourceAnnotationKey: "api",
kubetypes.ConfigMirrorAnnotationKey: "mirror",
},
},
Spec: v1.PodSpec{
Containers: []v1.Container{
{Name: "foo"},
},
},
},
}
containerID := "ab2cdf"
containerPath := fmt.Sprintf("/docker/%v", containerID)
containerInfo := cadvisorapi.ContainerInfo{
ContainerReference: cadvisorapi.ContainerReference{
Name: containerPath,
},
}
testKubelet := newTestKubelet(t, false /* controllerAttachDetachEnabled */)
defer testKubelet.Cleanup()
fakeRuntime := testKubelet.fakeRuntime
mockCadvisor := testKubelet.fakeCadvisor
cadvisorReq := &cadvisorapi.ContainerInfoRequest{}
mockCadvisor.On("DockerContainer", containerID, cadvisorReq).Return(containerInfo, nil)
kubelet := testKubelet.kubelet
fakeRuntime.PodList = []*containertest.FakePod{
{Pod: &kubecontainer.Pod{
ID: "1234",
Name: "qux",
Namespace: "ns",
Containers: []*kubecontainer.Container{
{
Name: "foo",
ID: kubecontainer.ContainerID{Type: "test", ID: containerID},
},
},
}},
}
kubelet.podManager.SetPods(pods)
// Use the mirror pod UID to retrieve the stats.
stats, err := kubelet.GetContainerInfo("qux_ns", "5678", "foo", cadvisorReq)
assert.NoError(t, err)
require.NotNil(t, stats)
mockCadvisor.AssertExpectations(t)
}
func TestHostNetworkAllowed(t *testing.T) {
testKubelet := newTestKubelet(t, false /* controllerAttachDetachEnabled */)
defer testKubelet.Cleanup()
testKubelet.fakeCadvisor.On("Start").Return(nil)
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
capabilities.SetForTests(capabilities.Capabilities{
PrivilegedSources: capabilities.PrivilegedSources{
HostNetworkSources: []string{kubetypes.ApiserverSource, kubetypes.FileSource},
},
})
pod := podWithUidNameNsSpec("12345678", "foo", "new", v1.PodSpec{
Containers: []v1.Container{
{Name: "foo"},
},
HostNetwork: true,
})
pod.Annotations[kubetypes.ConfigSourceAnnotationKey] = kubetypes.FileSource