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kubernetes/pkg/kubelet/kubelet_test.go
Yu-Ju Hong bb417e82d7 Kubelet: surface the container creation/start failure reason 
Container creation/start failure cannot be reproduced by inspecting the
containers. This change caches such errors so that kubelet can retrieve it
later.

This change also extends FakeDockerClient to support setting error response
for a specific function.
2015-04-10 16:02:27 -07:00

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/*
Copyright 2014 Google Inc. All rights reserved.
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/http"
"os"
"path"
"reflect"
"regexp"
"sort"
"strconv"
"strings"
"sync"
"testing"
"time"
"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
"github.com/GoogleCloudPlatform/kubernetes/pkg/api/resource"
"github.com/GoogleCloudPlatform/kubernetes/pkg/capabilities"
"github.com/GoogleCloudPlatform/kubernetes/pkg/client/record"
"github.com/GoogleCloudPlatform/kubernetes/pkg/client/testclient"
"github.com/GoogleCloudPlatform/kubernetes/pkg/kubelet/cadvisor"
"github.com/GoogleCloudPlatform/kubernetes/pkg/kubelet/container"
kubecontainer "github.com/GoogleCloudPlatform/kubernetes/pkg/kubelet/container"
"github.com/GoogleCloudPlatform/kubernetes/pkg/kubelet/dockertools"
"github.com/GoogleCloudPlatform/kubernetes/pkg/kubelet/metrics"
"github.com/GoogleCloudPlatform/kubernetes/pkg/kubelet/network"
"github.com/GoogleCloudPlatform/kubernetes/pkg/types"
"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
"github.com/GoogleCloudPlatform/kubernetes/pkg/version"
"github.com/GoogleCloudPlatform/kubernetes/pkg/volume"
_ "github.com/GoogleCloudPlatform/kubernetes/pkg/volume/host_path"
"github.com/fsouza/go-dockerclient"
cadvisorApi "github.com/google/cadvisor/info/v1"
)
func init() {
api.ForTesting_ReferencesAllowBlankSelfLinks = true
util.ReallyCrash = true
}
type TestKubelet struct {
kubelet *Kubelet
fakeDocker *dockertools.FakeDockerClient
fakeCadvisor *cadvisor.Mock
fakeKubeClient *testclient.Fake
waitGroup *sync.WaitGroup
fakeMirrorClient *fakeMirrorClient
}
func newTestKubelet(t *testing.T) *TestKubelet {
fakeDocker := &dockertools.FakeDockerClient{Errors: make(map[string]error), RemovedImages: util.StringSet{}}
fakeDockerCache := dockertools.NewFakeDockerCache(fakeDocker)
fakeRecorder := &record.FakeRecorder{}
fakeKubeClient := &testclient.Fake{}
kubelet := &Kubelet{}
kubelet.dockerClient = fakeDocker
kubelet.dockerCache = fakeDockerCache
kubelet.kubeClient = fakeKubeClient
kubelet.dockerPuller = &dockertools.FakeDockerPuller{}
kubelet.hostname = "testnode"
kubelet.networkPlugin, _ = network.InitNetworkPlugin([]network.NetworkPlugin{}, "", network.NewFakeHost(nil))
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)
}
waitGroup := new(sync.WaitGroup)
kubelet.podWorkers = newPodWorkers(
fakeDockerCache,
func(pod *api.Pod, mirrorPod *api.Pod, runningPod container.Pod) error {
err := kubelet.syncPod(pod, mirrorPod, runningPod)
waitGroup.Done()
return err
},
fakeRecorder)
kubelet.sourcesReady = func() bool { return true }
kubelet.masterServiceNamespace = api.NamespaceDefault
kubelet.serviceLister = testServiceLister{}
kubelet.nodeLister = testNodeLister{}
kubelet.readinessManager = kubecontainer.NewReadinessManager()
kubelet.recorder = fakeRecorder
kubelet.statusManager = newStatusManager(fakeKubeClient)
if err := kubelet.setupDataDirs(); err != nil {
t.Fatalf("can't initialize kubelet data dirs: %v", err)
}
mockCadvisor := &cadvisor.Mock{}
kubelet.cadvisor = mockCadvisor
podManager, fakeMirrorClient := newFakePodManager()
kubelet.podManager = podManager
kubelet.containerRefManager = kubecontainer.NewRefManager()
kubelet.containerManager = dockertools.NewDockerManager(fakeDocker, fakeRecorder, dockertools.PodInfraContainerImage)
return &TestKubelet{kubelet, fakeDocker, mockCadvisor, fakeKubeClient, waitGroup, fakeMirrorClient}
}
func verifyCalls(t *testing.T, fakeDocker *dockertools.FakeDockerClient, calls []string) {
err := fakeDocker.AssertCalls(calls)
if err != nil {
t.Error(err)
}
}
func verifyUnorderedCalls(t *testing.T, fakeDocker *dockertools.FakeDockerClient, calls []string) {
err := fakeDocker.AssertUnorderedCalls(calls)
if err != nil {
t.Error(err)
}
}
func verifyStringArrayEquals(t *testing.T, actual, expected []string) {
invalid := len(actual) != len(expected)
if !invalid {
for ix, value := range actual {
if expected[ix] != value {
invalid = true
}
}
}
if invalid {
t.Errorf("Expected: %#v, Actual: %#v", expected, actual)
}
}
func verifyStringArrayEqualsAnyOrder(t *testing.T, actual, expected []string) {
act := make([]string, len(actual))
exp := make([]string, len(expected))
copy(act, actual)
copy(exp, expected)
sort.StringSlice(act).Sort()
sort.StringSlice(exp).Sort()
if !reflect.DeepEqual(exp, act) {
t.Errorf("Expected(sorted): %#v, Actual(sorted): %#v", exp, act)
}
}
func verifyBoolean(t *testing.T, expected, value bool) {
if expected != value {
t.Errorf("Unexpected boolean. Expected %t. Found %t", expected, value)
}
}
func TestKubeletDirs(t *testing.T) {
testKubelet := newTestKubelet(t)
kubelet := testKubelet.kubelet
root := kubelet.rootDirectory
var exp, got string
got = kubelet.getPodsDir()
exp = path.Join(root, "pods")
if got != exp {
t.Errorf("expected %q', got %q", exp, got)
}
got = kubelet.getPluginsDir()
exp = path.Join(root, "plugins")
if got != exp {
t.Errorf("expected %q', got %q", exp, got)
}
got = kubelet.getPluginDir("foobar")
exp = path.Join(root, "plugins/foobar")
if got != exp {
t.Errorf("expected %q', got %q", exp, got)
}
got = kubelet.getPodDir("abc123")
exp = path.Join(root, "pods/abc123")
if got != exp {
t.Errorf("expected %q', got %q", exp, got)
}
got = kubelet.getPodVolumesDir("abc123")
exp = path.Join(root, "pods/abc123/volumes")
if got != exp {
t.Errorf("expected %q', got %q", exp, got)
}
got = kubelet.getPodVolumeDir("abc123", "plugin", "foobar")
exp = path.Join(root, "pods/abc123/volumes/plugin/foobar")
if got != exp {
t.Errorf("expected %q', got %q", exp, got)
}
got = kubelet.getPodPluginsDir("abc123")
exp = path.Join(root, "pods/abc123/plugins")
if got != exp {
t.Errorf("expected %q', got %q", exp, got)
}
got = kubelet.getPodPluginDir("abc123", "foobar")
exp = path.Join(root, "pods/abc123/plugins/foobar")
if got != exp {
t.Errorf("expected %q', got %q", exp, got)
}
got = kubelet.getPodContainerDir("abc123", "def456")
exp = path.Join(root, "pods/abc123/containers/def456")
if got != exp {
t.Errorf("expected %q', got %q", exp, got)
}
}
func TestKubeletDirsCompat(t *testing.T) {
testKubelet := newTestKubelet(t)
kubelet := testKubelet.kubelet
root := kubelet.rootDirectory
if err := os.MkdirAll(root, 0750); err != nil {
t.Fatalf("can't mkdir(%q): %s", root, err)
}
var exp, got string
// Old-style pod dir.
if err := os.MkdirAll(fmt.Sprintf("%s/oldpod", root), 0750); err != nil {
t.Fatalf("can't mkdir(%q): %s", root, err)
}
// New-style pod dir.
if err := os.MkdirAll(fmt.Sprintf("%s/pods/newpod", root), 0750); err != nil {
t.Fatalf("can't mkdir(%q): %s", root, err)
}
// Both-style pod dir.
if err := os.MkdirAll(fmt.Sprintf("%s/bothpod", root), 0750); err != nil {
t.Fatalf("can't mkdir(%q): %s", root, err)
}
if err := os.MkdirAll(fmt.Sprintf("%s/pods/bothpod", root), 0750); err != nil {
t.Fatalf("can't mkdir(%q): %s", root, err)
}
got = kubelet.getPodDir("oldpod")
exp = path.Join(root, "oldpod")
if got != exp {
t.Errorf("expected %q', got %q", exp, got)
}
got = kubelet.getPodDir("newpod")
exp = path.Join(root, "pods/newpod")
if got != exp {
t.Errorf("expected %q', got %q", exp, got)
}
got = kubelet.getPodDir("bothpod")
exp = path.Join(root, "pods/bothpod")
if got != exp {
t.Errorf("expected %q', got %q", exp, got)
}
got = kubelet.getPodDir("neitherpod")
exp = path.Join(root, "pods/neitherpod")
if got != exp {
t.Errorf("expected %q', got %q", exp, got)
}
root = kubelet.getPodDir("newpod")
// Old-style container dir.
if err := os.MkdirAll(fmt.Sprintf("%s/oldctr", root), 0750); err != nil {
t.Fatalf("can't mkdir(%q): %s", root, err)
}
// New-style container dir.
if err := os.MkdirAll(fmt.Sprintf("%s/containers/newctr", root), 0750); err != nil {
t.Fatalf("can't mkdir(%q): %s", root, err)
}
// Both-style container dir.
if err := os.MkdirAll(fmt.Sprintf("%s/bothctr", root), 0750); err != nil {
t.Fatalf("can't mkdir(%q): %s", root, err)
}
if err := os.MkdirAll(fmt.Sprintf("%s/containers/bothctr", root), 0750); err != nil {
t.Fatalf("can't mkdir(%q): %s", root, err)
}
got = kubelet.getPodContainerDir("newpod", "oldctr")
exp = path.Join(root, "oldctr")
if got != exp {
t.Errorf("expected %q', got %q", exp, got)
}
got = kubelet.getPodContainerDir("newpod", "newctr")
exp = path.Join(root, "containers/newctr")
if got != exp {
t.Errorf("expected %q', got %q", exp, got)
}
got = kubelet.getPodContainerDir("newpod", "bothctr")
exp = path.Join(root, "containers/bothctr")
if got != exp {
t.Errorf("expected %q', got %q", exp, got)
}
got = kubelet.getPodContainerDir("newpod", "neitherctr")
exp = path.Join(root, "containers/neitherctr")
if got != exp {
t.Errorf("expected %q', got %q", exp, got)
}
}
func apiContainerToContainer(c docker.APIContainers) container.Container {
dockerName, hash, err := dockertools.ParseDockerName(c.Names[0])
if err != nil {
return container.Container{}
}
return container.Container{
ID: types.UID(c.ID),
Name: dockerName.ContainerName,
Hash: hash,
}
}
func dockerContainersToPod(containers dockertools.DockerContainers) container.Pod {
var pod container.Pod
for _, c := range containers {
dockerName, hash, err := dockertools.ParseDockerName(c.Names[0])
if err != nil {
continue
}
pod.Containers = append(pod.Containers, &container.Container{
ID: types.UID(c.ID),
Name: dockerName.ContainerName,
Hash: hash,
Image: c.Image,
})
// TODO(yifan): Only one evaluation is enough.
pod.ID = dockerName.PodUID
name, namespace, _ := kubecontainer.ParsePodFullName(dockerName.PodFullName)
pod.Name = name
pod.Namespace = namespace
}
return pod
}
func TestKillContainerWithError(t *testing.T) {
containers := []docker.APIContainers{
{
ID: "1234",
Names: []string{"/k8s_foo_qux_new_1234_42"},
},
{
ID: "5678",
Names: []string{"/k8s_bar_qux_new_5678_42"},
},
}
fakeDocker := &dockertools.FakeDockerClient{
Errors: make(map[string]error),
ContainerList: append([]docker.APIContainers{}, containers...),
}
testKubelet := newTestKubelet(t)
kubelet := testKubelet.kubelet
for _, c := range fakeDocker.ContainerList {
kubelet.readinessManager.SetReadiness(c.ID, true)
}
kubelet.dockerClient = fakeDocker
c := apiContainerToContainer(fakeDocker.ContainerList[0])
fakeDocker.Errors["stop"] = fmt.Errorf("sample error")
err := kubelet.killContainer(&c)
if err == nil {
t.Errorf("expected error, found nil")
}
verifyCalls(t, fakeDocker, []string{"stop"})
killedContainer := containers[0]
liveContainer := containers[1]
ready := kubelet.readinessManager.GetReadiness(killedContainer.ID)
if ready {
t.Errorf("exepcted container entry ID '%v' to not be found. states: %+v", killedContainer.ID, ready)
}
ready = kubelet.readinessManager.GetReadiness(liveContainer.ID)
if !ready {
t.Errorf("exepcted container entry ID '%v' to be found. states: %+v", liveContainer.ID, ready)
}
}
func TestKillContainer(t *testing.T) {
containers := []docker.APIContainers{
{
ID: "1234",
Names: []string{"/k8s_foo_qux_new_1234_42"},
},
{
ID: "5678",
Names: []string{"/k8s_bar_qux_new_5678_42"},
},
}
testKubelet := newTestKubelet(t)
kubelet := testKubelet.kubelet
fakeDocker := testKubelet.fakeDocker
fakeDocker.ContainerList = append([]docker.APIContainers{}, containers...)
fakeDocker.Container = &docker.Container{
Name: "foobar",
}
for _, c := range fakeDocker.ContainerList {
kubelet.readinessManager.SetReadiness(c.ID, true)
}
c := apiContainerToContainer(fakeDocker.ContainerList[0])
err := kubelet.killContainer(&c)
if err != nil {
t.Errorf("unexpected error: %v", err)
}
verifyCalls(t, fakeDocker, []string{"stop"})
killedContainer := containers[0]
liveContainer := containers[1]
ready := kubelet.readinessManager.GetReadiness(killedContainer.ID)
if ready {
t.Errorf("exepcted container entry ID '%v' to not be found. states: %+v", killedContainer.ID, ready)
}
ready = kubelet.readinessManager.GetReadiness(liveContainer.ID)
if !ready {
t.Errorf("exepcted container entry ID '%v' to be found. states: %+v", liveContainer.ID, ready)
}
}
var emptyPodUIDs map[types.UID]metrics.SyncPodType
func TestSyncPodsDoesNothing(t *testing.T) {
testKubelet := newTestKubelet(t)
testKubelet.fakeCadvisor.On("MachineInfo").Return(&cadvisorApi.MachineInfo{}, nil)
kubelet := testKubelet.kubelet
fakeDocker := testKubelet.fakeDocker
waitGroup := testKubelet.waitGroup
container := api.Container{Name: "bar"}
fakeDocker.ContainerList = []docker.APIContainers{
{
// format is // k8s_<container-id>_<pod-fullname>_<pod-uid>_<random>
Names: []string{"/k8s_bar." + strconv.FormatUint(dockertools.HashContainer(&container), 16) + "_foo_new_12345678_0"},
ID: "1234",
},
{
// pod infra container
Names: []string{"/k8s_POD_foo_new_12345678_0"},
ID: "9876",
},
}
pods := []api.Pod{
{
ObjectMeta: api.ObjectMeta{
UID: "12345678",
Name: "foo",
Namespace: "new",
},
Spec: api.PodSpec{
Containers: []api.Container{
container,
},
},
},
}
kubelet.podManager.SetPods(pods)
waitGroup.Add(1)
err := kubelet.SyncPods(pods, emptyPodUIDs, map[string]api.Pod{}, time.Now())
if err != nil {
t.Errorf("unexpected error: %v", err)
}
waitGroup.Wait()
verifyCalls(t, fakeDocker, []string{"list", "list", "list", "inspect_container", "inspect_container", "list", "inspect_container", "inspect_container"})
}
func TestSyncPodsWithTerminationLog(t *testing.T) {
testKubelet := newTestKubelet(t)
testKubelet.fakeCadvisor.On("MachineInfo").Return(&cadvisorApi.MachineInfo{}, nil)
kubelet := testKubelet.kubelet
fakeDocker := testKubelet.fakeDocker
waitGroup := testKubelet.waitGroup
container := api.Container{
Name: "bar",
TerminationMessagePath: "/dev/somepath",
}
fakeDocker.ContainerList = []docker.APIContainers{}
pods := []api.Pod{
{
ObjectMeta: api.ObjectMeta{
UID: "12345678",
Name: "foo",
Namespace: "new",
},
Spec: api.PodSpec{
Containers: []api.Container{
container,
},
},
},
}
kubelet.podManager.SetPods(pods)
waitGroup.Add(1)
err := kubelet.SyncPods(pods, emptyPodUIDs, map[string]api.Pod{}, time.Now())
if err != nil {
t.Errorf("unexpected error: %v", err)
}
waitGroup.Wait()
verifyCalls(t, fakeDocker, []string{
"list", "list", "list", "inspect_image", "create", "start", "inspect_container", "create", "start", "list", "inspect_container", "inspect_container"})
fakeDocker.Lock()
parts := strings.Split(fakeDocker.Container.HostConfig.Binds[0], ":")
if !matchString(t, kubelet.getPodContainerDir("12345678", "bar")+"/k8s_bar\\.[a-f0-9]", parts[0]) {
t.Errorf("Unexpected host path: %s", parts[0])
}
if parts[1] != "/dev/somepath" {
t.Errorf("Unexpected container path: %s", parts[1])
}
fakeDocker.Unlock()
}
func matchString(t *testing.T, pattern, str string) bool {
match, err := regexp.MatchString(pattern, str)
if err != nil {
t.Logf("unexpected error: %v", err)
}
return match
}
func TestSyncPodsCreatesNetAndContainer(t *testing.T) {
testKubelet := newTestKubelet(t)
testKubelet.fakeCadvisor.On("MachineInfo").Return(&cadvisorApi.MachineInfo{}, nil)
kubelet := testKubelet.kubelet
fakeDocker := testKubelet.fakeDocker
waitGroup := testKubelet.waitGroup
kubelet.containerManager.PodInfraContainerImage = "custom_image_name"
fakeDocker.ContainerList = []docker.APIContainers{}
pods := []api.Pod{
{
ObjectMeta: api.ObjectMeta{
UID: "12345678",
Name: "foo",
Namespace: "new",
},
Spec: api.PodSpec{
Containers: []api.Container{
{Name: "bar"},
},
},
},
}
kubelet.podManager.SetPods(pods)
waitGroup.Add(1)
err := kubelet.SyncPods(pods, emptyPodUIDs, map[string]api.Pod{}, time.Now())
if err != nil {
t.Errorf("unexpected error: %v", err)
}
waitGroup.Wait()
verifyCalls(t, fakeDocker, []string{
"list", "list", "list", "inspect_image", "create", "start", "inspect_container", "create", "start", "list", "inspect_container", "inspect_container"})
fakeDocker.Lock()
found := false
for _, c := range fakeDocker.ContainerList {
if c.Image == "custom_image_name" && strings.HasPrefix(c.Names[0], "/k8s_POD") {
found = true
}
}
if !found {
t.Errorf("Custom pod infra container not found: %v", fakeDocker.ContainerList)
}
if len(fakeDocker.Created) != 2 ||
!matchString(t, "k8s_POD\\.[a-f0-9]+_foo_new_", fakeDocker.Created[0]) ||
!matchString(t, "k8s_bar\\.[a-f0-9]+_foo_new_", fakeDocker.Created[1]) {
t.Errorf("Unexpected containers created %v", fakeDocker.Created)
}
fakeDocker.Unlock()
}
func TestSyncPodsCreatesNetAndContainerPullsImage(t *testing.T) {
testKubelet := newTestKubelet(t)
testKubelet.fakeCadvisor.On("MachineInfo").Return(&cadvisorApi.MachineInfo{}, nil)
kubelet := testKubelet.kubelet
fakeDocker := testKubelet.fakeDocker
waitGroup := testKubelet.waitGroup
puller := kubelet.dockerPuller.(*dockertools.FakeDockerPuller)
puller.HasImages = []string{}
kubelet.containerManager.PodInfraContainerImage = "custom_image_name"
fakeDocker.ContainerList = []docker.APIContainers{}
pods := []api.Pod{
{
ObjectMeta: api.ObjectMeta{
UID: "12345678",
Name: "foo",
Namespace: "new",
},
Spec: api.PodSpec{
Containers: []api.Container{
{Name: "bar", Image: "something", ImagePullPolicy: "IfNotPresent"},
},
},
},
}
waitGroup.Add(1)
kubelet.podManager.SetPods(pods)
err := kubelet.SyncPods(pods, emptyPodUIDs, map[string]api.Pod{}, time.Now())
if err != nil {
t.Errorf("unexpected error: %v", err)
}
waitGroup.Wait()
verifyCalls(t, fakeDocker, []string{
"list", "list", "list", "inspect_image", "create", "start", "inspect_container", "create", "start", "list", "inspect_container", "inspect_container"})
fakeDocker.Lock()
if !reflect.DeepEqual(puller.ImagesPulled, []string{"custom_image_name", "something"}) {
t.Errorf("Unexpected pulled containers: %v", puller.ImagesPulled)
}
if len(fakeDocker.Created) != 2 ||
!matchString(t, "k8s_POD\\.[a-f0-9]+_foo_new_", fakeDocker.Created[0]) ||
!matchString(t, "k8s_bar\\.[a-f0-9]+_foo_new_", fakeDocker.Created[1]) {
t.Errorf("Unexpected containers created %v", fakeDocker.Created)
}
fakeDocker.Unlock()
}
func TestSyncPodsWithPodInfraCreatesContainer(t *testing.T) {
testKubelet := newTestKubelet(t)
testKubelet.fakeCadvisor.On("MachineInfo").Return(&cadvisorApi.MachineInfo{}, nil)
kubelet := testKubelet.kubelet
fakeDocker := testKubelet.fakeDocker
waitGroup := testKubelet.waitGroup
fakeDocker.ContainerList = []docker.APIContainers{
{
// pod infra container
Names: []string{"/k8s_POD_foo_new_12345678_0"},
ID: "9876",
},
}
pods := []api.Pod{
{
ObjectMeta: api.ObjectMeta{
UID: "12345678",
Name: "foo",
Namespace: "new",
},
Spec: api.PodSpec{
Containers: []api.Container{
{Name: "bar"},
},
},
},
}
waitGroup.Add(1)
kubelet.podManager.SetPods(pods)
err := kubelet.SyncPods(pods, emptyPodUIDs, map[string]api.Pod{}, time.Now())
if err != nil {
t.Errorf("unexpected error: %v", err)
}
waitGroup.Wait()
verifyCalls(t, fakeDocker, []string{
"list", "list", "list", "inspect_container", "inspect_image", "create", "start", "list", "inspect_container", "inspect_container"})
fakeDocker.Lock()
if len(fakeDocker.Created) != 1 ||
!matchString(t, "k8s_bar\\.[a-f0-9]+_foo_new_", fakeDocker.Created[0]) {
t.Errorf("Unexpected containers created %v", fakeDocker.Created)
}
fakeDocker.Unlock()
}
func TestSyncPodsWithPodInfraCreatesContainerCallsHandler(t *testing.T) {
testKubelet := newTestKubelet(t)
testKubelet.fakeCadvisor.On("MachineInfo").Return(&cadvisorApi.MachineInfo{}, nil)
kubelet := testKubelet.kubelet
fakeDocker := testKubelet.fakeDocker
waitGroup := testKubelet.waitGroup
fakeHttp := fakeHTTP{}
kubelet.httpClient = &fakeHttp
fakeDocker.ContainerList = []docker.APIContainers{
{
// pod infra container
Names: []string{"/k8s_POD_foo_new_12345678_0"},
ID: "9876",
},
}
pods := []api.Pod{
{
ObjectMeta: api.ObjectMeta{
UID: "12345678",
Name: "foo",
Namespace: "new",
},
Spec: api.PodSpec{
Containers: []api.Container{
{
Name: "bar",
Lifecycle: &api.Lifecycle{
PostStart: &api.Handler{
HTTPGet: &api.HTTPGetAction{
Host: "foo",
Port: util.IntOrString{IntVal: 8080, Kind: util.IntstrInt},
Path: "bar",
},
},
},
},
},
},
},
}
waitGroup.Add(1)
kubelet.podManager.SetPods(pods)
err := kubelet.SyncPods(pods, emptyPodUIDs, map[string]api.Pod{}, time.Now())
if err != nil {
t.Errorf("unexpected error: %v", err)
}
waitGroup.Wait()
verifyCalls(t, fakeDocker, []string{
"list", "list", "list", "inspect_container", "inspect_image", "create", "start", "list", "inspect_container", "inspect_container"})
fakeDocker.Lock()
if len(fakeDocker.Created) != 1 ||
!matchString(t, "k8s_bar\\.[a-f0-9]+_foo_new_", fakeDocker.Created[0]) {
t.Errorf("Unexpected containers created %v", fakeDocker.Created)
}
fakeDocker.Unlock()
if fakeHttp.url != "http://foo:8080/bar" {
t.Errorf("Unexpected handler: %s", fakeHttp.url)
}
}
func TestSyncPodsDeletesWithNoPodInfraContainer(t *testing.T) {
testKubelet := newTestKubelet(t)
testKubelet.fakeCadvisor.On("MachineInfo").Return(&cadvisorApi.MachineInfo{}, nil)
kubelet := testKubelet.kubelet
fakeDocker := testKubelet.fakeDocker
waitGroup := testKubelet.waitGroup
fakeDocker.ContainerList = []docker.APIContainers{
{
// format is // k8s_<container-id>_<pod-fullname>_<pod-uid>
Names: []string{"/k8s_bar1_foo1_new_12345678_0"},
ID: "1234",
},
{
// format is // k8s_<container-id>_<pod-fullname>_<pod-uid>
Names: []string{"/k8s_bar2_foo2_new_87654321_0"},
ID: "5678",
},
{
// format is // k8s_<container-id>_<pod-fullname>_<pod-uid>
Names: []string{"/k8s_POD_foo2_new_87654321_0"},
ID: "8765",
},
}
pods := []api.Pod{
{
ObjectMeta: api.ObjectMeta{
UID: "12345678",
Name: "foo1",
Namespace: "new",
},
Spec: api.PodSpec{
Containers: []api.Container{
{Name: "bar1"},
},
},
},
{
ObjectMeta: api.ObjectMeta{
UID: "87654321",
Name: "foo2",
Namespace: "new",
},
Spec: api.PodSpec{
Containers: []api.Container{
{Name: "bar2"},
},
},
},
}
waitGroup.Add(2)
kubelet.podManager.SetPods(pods)
err := kubelet.SyncPods(pods, emptyPodUIDs, map[string]api.Pod{}, time.Now())
if err != nil {
t.Errorf("unexpected error: %v", err)
}
waitGroup.Wait()
verifyUnorderedCalls(t, fakeDocker, []string{
"list",
// foo1
"list", "list", "inspect_container", "stop", "create", "start", "inspect_container", "create", "start", "list", "inspect_container", "inspect_container",
// foo2
"list", "list", "inspect_container", "inspect_container", "list", "inspect_container", "inspect_container",
})
// A map iteration is used to delete containers, so must not depend on
// order here.
expectedToStop := map[string]bool{
"1234": true,
}
fakeDocker.Lock()
if len(fakeDocker.Stopped) != 1 || !expectedToStop[fakeDocker.Stopped[0]] {
t.Errorf("Wrong containers were stopped: %v", fakeDocker.Stopped)
}
fakeDocker.Unlock()
}
func TestSyncPodsDeletesWhenSourcesAreReady(t *testing.T) {
ready := false
testKubelet := newTestKubelet(t)
testKubelet.fakeCadvisor.On("MachineInfo").Return(&cadvisorApi.MachineInfo{}, nil)
kubelet := testKubelet.kubelet
fakeDocker := testKubelet.fakeDocker
kubelet.sourcesReady = func() bool { return ready }
fakeDocker.ContainerList = []docker.APIContainers{
{
// the k8s prefix is required for the kubelet to manage the container
Names: []string{"/k8s_foo_bar_new_12345678_42"},
ID: "1234",
},
{
// pod infra container
Names: []string{"/k8s_POD_foo_new_12345678_42"},
ID: "9876",
},
}
if err := kubelet.SyncPods([]api.Pod{}, emptyPodUIDs, map[string]api.Pod{}, time.Now()); err != nil {
t.Errorf("unexpected error: %v", err)
}
// Validate nothing happened.
verifyCalls(t, fakeDocker, []string{"list"})
fakeDocker.ClearCalls()
ready = true
if err := kubelet.SyncPods([]api.Pod{}, emptyPodUIDs, map[string]api.Pod{}, time.Now()); err != nil {
t.Errorf("unexpected error: %v", err)
}
verifyCalls(t, fakeDocker, []string{"list", "stop", "stop", "inspect_container", "inspect_container"})
// A map iteration is used to delete containers, so must not depend on
// order here.
expectedToStop := map[string]bool{
"1234": true,
"9876": true,
}
if len(fakeDocker.Stopped) != 2 ||
!expectedToStop[fakeDocker.Stopped[0]] ||
!expectedToStop[fakeDocker.Stopped[1]] {
t.Errorf("Wrong containers were stopped: %v", fakeDocker.Stopped)
}
}
func TestSyncPodsDeletes(t *testing.T) {
testKubelet := newTestKubelet(t)
testKubelet.fakeCadvisor.On("MachineInfo").Return(&cadvisorApi.MachineInfo{}, nil)
kubelet := testKubelet.kubelet
fakeDocker := testKubelet.fakeDocker
fakeDocker.ContainerList = []docker.APIContainers{
{
// the k8s prefix is required for the kubelet to manage the container
Names: []string{"/k8s_foo_bar_new_12345678_42"},
ID: "1234",
},
{
// pod infra container
Names: []string{"/k8s_POD_foo_new_12345678_42"},
ID: "9876",
},
{
Names: []string{"foo"},
ID: "4567",
},
}
err := kubelet.SyncPods([]api.Pod{}, emptyPodUIDs, map[string]api.Pod{}, time.Now())
if err != nil {
t.Errorf("unexpected error: %v", err)
}
verifyCalls(t, fakeDocker, []string{"list", "stop", "stop", "inspect_container", "inspect_container"})
// A map iteration is used to delete containers, so must not depend on
// order here.
expectedToStop := map[string]bool{
"1234": true,
"9876": true,
}
if len(fakeDocker.Stopped) != 2 ||
!expectedToStop[fakeDocker.Stopped[0]] ||
!expectedToStop[fakeDocker.Stopped[1]] {
t.Errorf("Wrong containers were stopped: %v", fakeDocker.Stopped)
}
}
func TestSyncPodDeletesDuplicate(t *testing.T) {
testKubelet := newTestKubelet(t)
kubelet := testKubelet.kubelet
fakeDocker := testKubelet.fakeDocker
dockerContainers := dockertools.DockerContainers{
"1234": &docker.APIContainers{
// the k8s prefix is required for the kubelet to manage the container
Names: []string{"/k8s_foo_bar_new_12345678_1111"},
ID: "1234",
},
"9876": &docker.APIContainers{
// pod infra container
Names: []string{"/k8s_POD_bar_new_12345678_2222"},
ID: "9876",
},
"4567": &docker.APIContainers{
// Duplicate for the same container.
Names: []string{"/k8s_foo_bar_new_12345678_3333"},
ID: "4567",
},
}
bound := api.Pod{
ObjectMeta: api.ObjectMeta{
UID: "12345678",
Name: "bar",
Namespace: "new",
},
Spec: api.PodSpec{
Containers: []api.Container{
{Name: "foo"},
},
},
}
pods := []api.Pod{bound}
kubelet.podManager.SetPods(pods)
err := kubelet.syncPod(&bound, nil, dockerContainersToPod(dockerContainers))
if err != nil {
t.Errorf("unexpected error: %v", err)
}
verifyCalls(t, fakeDocker, []string{"list", "inspect_image", "stop", "list", "inspect_image"})
// Expect one of the duplicates to be killed.
if len(fakeDocker.Stopped) != 1 || (fakeDocker.Stopped[0] != "1234" && fakeDocker.Stopped[0] != "4567") {
t.Errorf("Wrong containers were stopped: %v", fakeDocker.Stopped)
}
}
func TestSyncPodBadHash(t *testing.T) {
testKubelet := newTestKubelet(t)
kubelet := testKubelet.kubelet
fakeDocker := testKubelet.fakeDocker
dockerContainers := dockertools.DockerContainers{
"1234": &docker.APIContainers{
// the k8s prefix is required for the kubelet to manage the container
Names: []string{"/k8s_bar.1234_foo_new_12345678_42"},
ID: "1234",
},
"9876": &docker.APIContainers{
// pod infra container
Names: []string{"/k8s_POD_foo_new_12345678_42"},
ID: "9876",
},
}
bound := api.Pod{
ObjectMeta: api.ObjectMeta{
UID: "12345678",
Name: "foo",
Namespace: "new",
},
Spec: api.PodSpec{
Containers: []api.Container{
{Name: "bar"},
},
},
}
pods := []api.Pod{bound}
kubelet.podManager.SetPods(pods)
err := kubelet.syncPod(&bound, nil, dockerContainersToPod(dockerContainers))
if err != nil {
t.Errorf("unexpected error: %v", err)
}
verifyCalls(t, fakeDocker, []string{"list", "inspect_image", "stop", "stop", "create", "start",
"inspect_container", "create", "start", "list", "inspect_container", "inspect_container"})
// A map interation is used to delete containers, so must not depend on
// order here.
expectedToStop := map[string]bool{
"1234": true,
"9876": true,
}
if len(fakeDocker.Stopped) != 2 ||
(!expectedToStop[fakeDocker.Stopped[0]] &&
!expectedToStop[fakeDocker.Stopped[1]]) {
t.Errorf("Wrong containers were stopped: %v", fakeDocker.Stopped)
}
}
func TestSyncPodUnhealthy(t *testing.T) {
testKubelet := newTestKubelet(t)
kubelet := testKubelet.kubelet
fakeDocker := testKubelet.fakeDocker
dockerContainers := dockertools.DockerContainers{
"1234": &docker.APIContainers{
// the k8s prefix is required for the kubelet to manage the container
Names: []string{"/k8s_bar_foo_new_12345678_42"},
ID: "1234",
},
"9876": &docker.APIContainers{
// pod infra container
Names: []string{"/k8s_POD_foo_new_12345678_42"},
ID: "9876",
},
}
bound := api.Pod{
ObjectMeta: api.ObjectMeta{
UID: "12345678",
Name: "foo",
Namespace: "new",
},
Spec: api.PodSpec{
Containers: []api.Container{
{Name: "bar",
LivenessProbe: &api.Probe{
// Always returns healthy == false
},
},
},
},
}
pods := []api.Pod{bound}
kubelet.podManager.SetPods(pods)
err := kubelet.syncPod(&bound, nil, dockerContainersToPod(dockerContainers))
if err != nil {
t.Errorf("unexpected error: %v", err)
}
verifyCalls(t, fakeDocker, []string{"list", "inspect_image", "stop", "create", "start", "list", "inspect_container"})
// A map interation is used to delete containers, so must not depend on
// order here.
expectedToStop := map[string]bool{
"1234": true,
}
if len(fakeDocker.Stopped) != len(expectedToStop) ||
!expectedToStop[fakeDocker.Stopped[0]] {
t.Errorf("Wrong containers were stopped: %v", fakeDocker.Stopped)
}
}
func TestMountExternalVolumes(t *testing.T) {
testKubelet := newTestKubelet(t)
kubelet := testKubelet.kubelet
kubelet.volumePluginMgr.InitPlugins([]volume.VolumePlugin{&volume.FakeVolumePlugin{"fake", nil}}, &volumeHost{kubelet})
pod := api.Pod{
ObjectMeta: api.ObjectMeta{
UID: "12345678",
Name: "foo",
Namespace: "test",
},
Spec: api.PodSpec{
Volumes: []api.Volume{
{
Name: "vol1",
VolumeSource: api.VolumeSource{},
},
},
},
}
podVolumes, err := kubelet.mountExternalVolumes(&pod)
if err != nil {
t.Errorf("Expected sucess: %v", err)
}
expectedPodVolumes := []string{"vol1"}
if len(expectedPodVolumes) != len(podVolumes) {
t.Errorf("Unexpected volumes. Expected %#v got %#v. Manifest was: %#v", expectedPodVolumes, podVolumes, pod)
}
for _, name := range expectedPodVolumes {
if _, ok := podVolumes[name]; !ok {
t.Errorf("api.Pod volumes map is missing key: %s. %#v", name, podVolumes)
}
}
}
func TestGetPodVolumesFromDisk(t *testing.T) {
testKubelet := newTestKubelet(t)
kubelet := testKubelet.kubelet
plug := &volume.FakeVolumePlugin{"fake", nil}
kubelet.volumePluginMgr.InitPlugins([]volume.VolumePlugin{plug}, &volumeHost{kubelet})
volsOnDisk := []struct {
podUID types.UID
volName string
}{
{"pod1", "vol1"},
{"pod1", "vol2"},
{"pod2", "vol1"},
}
expectedPaths := []string{}
for i := range volsOnDisk {
fv := volume.FakeVolume{volsOnDisk[i].podUID, volsOnDisk[i].volName, plug}
fv.SetUp()
expectedPaths = append(expectedPaths, fv.GetPath())
}
volumesFound := kubelet.getPodVolumesFromDisk()
if len(volumesFound) != len(expectedPaths) {
t.Errorf("Expected to find %d cleaners, got %d", len(expectedPaths), len(volumesFound))
}
for _, ep := range expectedPaths {
found := false
for _, cl := range volumesFound {
if ep == cl.GetPath() {
found = true
break
}
}
if !found {
t.Errorf("Could not find a volume with path %s", ep)
}
}
}
type stubVolume struct {
path string
}
func (f *stubVolume) GetPath() string {
return f.path
}
func TestMakeVolumesAndBinds(t *testing.T) {
container := api.Container{
VolumeMounts: []api.VolumeMount{
{
MountPath: "/mnt/path",
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 := volumeMap{
"disk": &stubVolume{"/mnt/disk"},
"disk4": &stubVolume{"/mnt/host"},
"disk5": &stubVolume{"/var/lib/kubelet/podID/volumes/empty/disk5"},
}
binds := makeBinds(&container, podVolumes)
expectedBinds := []string{
"/mnt/disk:/mnt/path",
"/mnt/disk:/mnt/path3:ro",
"/mnt/host:/mnt/path4",
"/var/lib/kubelet/podID/volumes/empty/disk5:/mnt/path5",
}
if len(binds) != len(expectedBinds) {
t.Errorf("Unexpected binds: Expected %#v got %#v. Container was: %#v", expectedBinds, binds, container)
}
verifyStringArrayEquals(t, binds, expectedBinds)
}
type errorTestingDockerClient struct {
dockertools.FakeDockerClient
listContainersError error
containerList []docker.APIContainers
}
func (f *errorTestingDockerClient) ListContainers(options docker.ListContainersOptions) ([]docker.APIContainers, error) {
return f.containerList, f.listContainersError
}
func TestGetContainerInfo(t *testing.T) {
containerID := "ab2cdf"
containerPath := fmt.Sprintf("/docker/%v", containerID)
containerInfo := cadvisorApi.ContainerInfo{
ContainerReference: cadvisorApi.ContainerReference{
Name: containerPath,
},
}
testKubelet := newTestKubelet(t)
kubelet := testKubelet.kubelet
fakeDocker := testKubelet.fakeDocker
mockCadvisor := testKubelet.fakeCadvisor
cadvisorReq := &cadvisorApi.ContainerInfoRequest{}
mockCadvisor.On("DockerContainer", containerID, cadvisorReq).Return(containerInfo, nil)
fakeDocker.ContainerList = []docker.APIContainers{
{
ID: containerID,
// pod id: qux
// container id: foo
Names: []string{"/k8s_foo_qux_ns_1234_42"},
},
}
stats, err := kubelet.GetContainerInfo("qux_ns", "", "foo", cadvisorReq)
if err != nil {
t.Errorf("unexpected error: %v", err)
}
if stats == nil {
t.Fatalf("stats should not be nil")
}
mockCadvisor.AssertExpectations(t)
}
func TestGetRootInfo(t *testing.T) {
containerPath := "/"
containerInfo := &cadvisorApi.ContainerInfo{
ContainerReference: cadvisorApi.ContainerReference{
Name: containerPath,
},
}
fakeDocker := dockertools.FakeDockerClient{}
mockCadvisor := &cadvisor.Mock{}
cadvisorReq := &cadvisorApi.ContainerInfoRequest{}
mockCadvisor.On("ContainerInfo", containerPath, cadvisorReq).Return(containerInfo, nil)
kubelet := Kubelet{
dockerClient: &fakeDocker,
dockerPuller: &dockertools.FakeDockerPuller{},
cadvisor: mockCadvisor,
}
// If the container name is an empty string, then it means the root container.
_, err := kubelet.GetRootInfo(cadvisorReq)
if err != nil {
t.Errorf("unexpected error: %v", err)
}
mockCadvisor.AssertExpectations(t)
}
func TestGetContainerInfoWhenCadvisorFailed(t *testing.T) {
containerID := "ab2cdf"
testKubelet := newTestKubelet(t)
kubelet := testKubelet.kubelet
fakeDocker := testKubelet.fakeDocker
mockCadvisor := testKubelet.fakeCadvisor
cadvisorApiFailure := fmt.Errorf("cAdvisor failure")
containerInfo := cadvisorApi.ContainerInfo{}
cadvisorReq := &cadvisorApi.ContainerInfoRequest{}
mockCadvisor.On("DockerContainer", containerID, cadvisorReq).Return(containerInfo, cadvisorApiFailure)
fakeDocker.ContainerList = []docker.APIContainers{
{
ID: containerID,
// pod id: qux
// container id: foo
Names: []string{"/k8s_foo_qux_ns_uuid_1234"},
},
}
stats, err := kubelet.GetContainerInfo("qux_ns", "uuid", "foo", cadvisorReq)
if stats != nil {
t.Errorf("non-nil stats on error")
}
if err == nil {
t.Errorf("expect error but received nil error")
return
}
if err.Error() != cadvisorApiFailure.Error() {
t.Errorf("wrong error message. expect %v, got %v", cadvisorApiFailure, err)
}
mockCadvisor.AssertExpectations(t)
}
func TestGetContainerInfoOnNonExistContainer(t *testing.T) {
testKubelet := newTestKubelet(t)
kubelet := testKubelet.kubelet
fakeDocker := testKubelet.fakeDocker
mockCadvisor := testKubelet.fakeCadvisor
fakeDocker.ContainerList = []docker.APIContainers{}
stats, _ := kubelet.GetContainerInfo("qux", "", "foo", nil)
if stats != nil {
t.Errorf("non-nil stats on non exist container")
}
mockCadvisor.AssertExpectations(t)
}
func TestGetContainerInfoWhenDockerToolsFailed(t *testing.T) {
testKubelet := newTestKubelet(t)
kubelet := testKubelet.kubelet
mockCadvisor := testKubelet.fakeCadvisor
expectedErr := fmt.Errorf("List containers error")
kubelet.dockerClient = &errorTestingDockerClient{listContainersError: expectedErr}
stats, err := kubelet.GetContainerInfo("qux", "", "foo", nil)
if err == nil {
t.Errorf("Expected error from dockertools, got none")
}
if err.Error() != expectedErr.Error() {
t.Errorf("Expected error %v got %v", expectedErr.Error(), err.Error())
}
if stats != nil {
t.Errorf("non-nil stats when dockertools failed")
}
mockCadvisor.AssertExpectations(t)
}
func TestGetContainerInfoWithNoContainers(t *testing.T) {
testKubelet := newTestKubelet(t)
kubelet := testKubelet.kubelet
mockCadvisor := testKubelet.fakeCadvisor
kubelet.dockerClient = &errorTestingDockerClient{listContainersError: nil}
stats, err := kubelet.GetContainerInfo("qux_ns", "", "foo", nil)
if err == nil {
t.Errorf("Expected error from cadvisor client, got none")
}
if err != ErrNoKubeletContainers {
t.Errorf("Expected error %v, got %v", ErrNoKubeletContainers.Error(), err.Error())
}
if stats != nil {
t.Errorf("non-nil stats when dockertools returned no containers")
}
mockCadvisor.AssertExpectations(t)
}
func TestGetContainerInfoWithNoMatchingContainers(t *testing.T) {
testKubelet := newTestKubelet(t)
kubelet := testKubelet.kubelet
mockCadvisor := testKubelet.fakeCadvisor
containerList := []docker.APIContainers{
{
ID: "fakeId",
Names: []string{"/k8s_bar_qux_ns_1234_42"},
},
}
kubelet.dockerClient = &errorTestingDockerClient{listContainersError: nil, containerList: containerList}
stats, err := kubelet.GetContainerInfo("qux_ns", "", "foo", nil)
if err == nil {
t.Errorf("Expected error from cadvisor client, got none")
}
if err != ErrContainerNotFound {
t.Errorf("Expected error %v, got %v", ErrContainerNotFound.Error(), err.Error())
}
if stats != nil {
t.Errorf("non-nil stats when dockertools returned no containers")
}
mockCadvisor.AssertExpectations(t)
}
type fakeContainerCommandRunner struct {
Cmd []string
ID string
E error
Stdin io.Reader
Stdout io.WriteCloser
Stderr io.WriteCloser
TTY bool
Port uint16
Stream io.ReadWriteCloser
}
func (f *fakeContainerCommandRunner) RunInContainer(id string, cmd []string) ([]byte, error) {
f.Cmd = cmd
f.ID = id
return []byte{}, f.E
}
func (f *fakeContainerCommandRunner) GetDockerServerVersion() ([]uint, error) {
return nil, nil
}
func (f *fakeContainerCommandRunner) ExecInContainer(id string, cmd []string, in io.Reader, out, err io.WriteCloser, tty bool) error {
f.Cmd = cmd
f.ID = id
f.Stdin = in
f.Stdout = out
f.Stderr = err
f.TTY = tty
return f.E
}
func (f *fakeContainerCommandRunner) PortForward(pod *kubecontainer.Pod, port uint16, stream io.ReadWriteCloser) error {
podInfraContainer := pod.FindContainerByName(dockertools.PodInfraContainerName)
if podInfraContainer == nil {
return fmt.Errorf("cannot find pod infra container in pod %q", kubecontainer.BuildPodFullName(pod.Name, pod.Namespace))
}
f.ID = string(podInfraContainer.ID)
f.Port = port
f.Stream = stream
return nil
}
func TestRunInContainerNoSuchPod(t *testing.T) {
fakeCommandRunner := fakeContainerCommandRunner{}
testKubelet := newTestKubelet(t)
kubelet := testKubelet.kubelet
fakeDocker := testKubelet.fakeDocker
fakeDocker.ContainerList = []docker.APIContainers{}
kubelet.runner = &fakeCommandRunner
podName := "podFoo"
podNamespace := "nsFoo"
containerName := "containerFoo"
output, err := kubelet.RunInContainer(
kubecontainer.GetPodFullName(&api.Pod{ObjectMeta: api.ObjectMeta{Name: podName, Namespace: podNamespace}}),
"",
containerName,
[]string{"ls"})
if output != nil {
t.Errorf("unexpected non-nil command: %v", output)
}
if err == nil {
t.Error("unexpected non-error")
}
}
func TestRunInContainer(t *testing.T) {
fakeCommandRunner := fakeContainerCommandRunner{}
testKubelet := newTestKubelet(t)
kubelet := testKubelet.kubelet
fakeDocker := testKubelet.fakeDocker
kubelet.runner = &fakeCommandRunner
containerID := "abc1234"
podName := "podFoo"
podNamespace := "nsFoo"
containerName := "containerFoo"
fakeDocker.ContainerList = []docker.APIContainers{
{
ID: containerID,
Names: []string{"/k8s_" + containerName + "_" + podName + "_" + podNamespace + "_12345678_42"},
},
}
cmd := []string{"ls"}
_, err := kubelet.RunInContainer(
kubecontainer.GetPodFullName(&api.Pod{
ObjectMeta: api.ObjectMeta{
UID: "12345678",
Name: podName,
Namespace: podNamespace,
},
}),
"",
containerName,
cmd)
if fakeCommandRunner.ID != containerID {
t.Errorf("unexpected Name: %s", fakeCommandRunner.ID)
}
if !reflect.DeepEqual(fakeCommandRunner.Cmd, cmd) {
t.Errorf("unexpected command: %s", fakeCommandRunner.Cmd)
}
if err != nil {
t.Errorf("unexpected error: %v", err)
}
}
func TestRunHandlerExec(t *testing.T) {
fakeCommandRunner := fakeContainerCommandRunner{}
testKubelet := newTestKubelet(t)
kubelet := testKubelet.kubelet
fakeDocker := testKubelet.fakeDocker
kubelet.runner = &fakeCommandRunner
containerID := "abc1234"
podName := "podFoo"
podNamespace := "nsFoo"
containerName := "containerFoo"
fakeDocker.ContainerList = []docker.APIContainers{
{
ID: containerID,
Names: []string{"/k8s_" + containerName + "_" + podName + "_" + podNamespace + "_12345678_42"},
},
}
container := api.Container{
Name: containerName,
Lifecycle: &api.Lifecycle{
PostStart: &api.Handler{
Exec: &api.ExecAction{
Command: []string{"ls", "-a"},
},
},
},
}
err := kubelet.runHandler(podName+"_"+podNamespace, "", &container, container.Lifecycle.PostStart)
if err != nil {
t.Errorf("unexpected error: %v", err)
}
if fakeCommandRunner.ID != containerID ||
!reflect.DeepEqual(container.Lifecycle.PostStart.Exec.Command, fakeCommandRunner.Cmd) {
t.Errorf("unexpected commands: %v", fakeCommandRunner)
}
}
type fakeHTTP struct {
url string
err error
}
func (f *fakeHTTP) Get(url string) (*http.Response, error) {
f.url = url
return nil, f.err
}
func TestRunHandlerHttp(t *testing.T) {
fakeHttp := fakeHTTP{}
testKubelet := newTestKubelet(t)
kubelet := testKubelet.kubelet
kubelet.httpClient = &fakeHttp
podName := "podFoo"
podNamespace := "nsFoo"
containerName := "containerFoo"
container := api.Container{
Name: containerName,
Lifecycle: &api.Lifecycle{
PostStart: &api.Handler{
HTTPGet: &api.HTTPGetAction{
Host: "foo",
Port: util.IntOrString{IntVal: 8080, Kind: util.IntstrInt},
Path: "bar",
},
},
},
}
err := kubelet.runHandler(podName+"_"+podNamespace, "", &container, container.Lifecycle.PostStart)
if err != nil {
t.Errorf("unexpected error: %v", err)
}
if fakeHttp.url != "http://foo:8080/bar" {
t.Errorf("unexpected url: %s", fakeHttp.url)
}
}
func TestNewHandler(t *testing.T) {
testKubelet := newTestKubelet(t)
kubelet := testKubelet.kubelet
handler := &api.Handler{
HTTPGet: &api.HTTPGetAction{
Host: "foo",
Port: util.IntOrString{IntVal: 8080, Kind: util.IntstrInt},
Path: "bar",
},
}
actionHandler := kubelet.newActionHandler(handler)
if actionHandler == nil {
t.Error("unexpected nil action handler.")
}
handler = &api.Handler{
Exec: &api.ExecAction{
Command: []string{"ls", "-l"},
},
}
actionHandler = kubelet.newActionHandler(handler)
if actionHandler == nil {
t.Error("unexpected nil action handler.")
}
handler = &api.Handler{}
actionHandler = kubelet.newActionHandler(handler)
if actionHandler != nil {
t.Errorf("unexpected non-nil action handler: %v", actionHandler)
}
}
func TestSyncPodEventHandlerFails(t *testing.T) {
testKubelet := newTestKubelet(t)
kubelet := testKubelet.kubelet
fakeDocker := testKubelet.fakeDocker
kubelet.httpClient = &fakeHTTP{
err: fmt.Errorf("test error"),
}
dockerContainers := dockertools.DockerContainers{
"9876": &docker.APIContainers{
// pod infra container
Names: []string{"/k8s_POD_foo_new_12345678_42"},
ID: "9876",
},
}
bound := api.Pod{
ObjectMeta: api.ObjectMeta{
UID: "12345678",
Name: "foo",
Namespace: "new",
},
Spec: api.PodSpec{
Containers: []api.Container{
{Name: "bar",
Lifecycle: &api.Lifecycle{
PostStart: &api.Handler{
HTTPGet: &api.HTTPGetAction{
Host: "does.no.exist",
Port: util.IntOrString{IntVal: 8080, Kind: util.IntstrInt},
Path: "bar",
},
},
},
},
},
},
}
pods := []api.Pod{bound}
kubelet.podManager.SetPods(pods)
err := kubelet.syncPod(&bound, nil, dockerContainersToPod(dockerContainers))
if err != nil {
t.Errorf("unexpected error: %v", err)
}
verifyCalls(t, fakeDocker, []string{"list", "inspect_image", "create", "start", "stop", "list", "inspect_image"})
if len(fakeDocker.Stopped) != 1 {
t.Errorf("Wrong containers were stopped: %v", fakeDocker.Stopped)
}
}
func TestSyncPodsWithPullPolicy(t *testing.T) {
testKubelet := newTestKubelet(t)
testKubelet.fakeCadvisor.On("MachineInfo").Return(&cadvisorApi.MachineInfo{}, nil)
kubelet := testKubelet.kubelet
fakeDocker := testKubelet.fakeDocker
waitGroup := testKubelet.waitGroup
puller := kubelet.dockerPuller.(*dockertools.FakeDockerPuller)
puller.HasImages = []string{"existing_one", "want:latest"}
kubelet.containerManager.PodInfraContainerImage = "custom_image_name"
fakeDocker.ContainerList = []docker.APIContainers{}
pods := []api.Pod{
{
ObjectMeta: api.ObjectMeta{
UID: "12345678",
Name: "foo",
Namespace: "new",
},
Spec: api.PodSpec{
Containers: []api.Container{
{Name: "bar", Image: "pull_always_image", ImagePullPolicy: api.PullAlways},
{Name: "bar1", Image: "pull_never_image", ImagePullPolicy: api.PullNever},
{Name: "bar2", Image: "pull_if_not_present_image", ImagePullPolicy: api.PullIfNotPresent},
{Name: "bar3", Image: "existing_one", ImagePullPolicy: api.PullIfNotPresent},
{Name: "bar4", Image: "want:latest", ImagePullPolicy: api.PullIfNotPresent},
},
},
},
}
kubelet.podManager.SetPods(pods)
waitGroup.Add(1)
err := kubelet.SyncPods(pods, emptyPodUIDs, map[string]api.Pod{}, time.Now())
if err != nil {
t.Errorf("unexpected error: %v", err)
}
waitGroup.Wait()
fakeDocker.Lock()
pulledImageSet := make(map[string]empty)
for v := range puller.ImagesPulled {
pulledImageSet[puller.ImagesPulled[v]] = empty{}
}
if !reflect.DeepEqual(pulledImageSet, map[string]empty{
"custom_image_name": {},
"pull_always_image": {},
"pull_if_not_present_image": {},
}) {
t.Errorf("Unexpected pulled containers: %v", puller.ImagesPulled)
}
if len(fakeDocker.Created) != 6 {
t.Errorf("Unexpected containers created %v", fakeDocker.Created)
}
fakeDocker.Unlock()
}
func TestParseResolvConf(t *testing.T) {
testCases := []struct {
data string
nameservers []string
searches []string
}{
{"", []string{}, []string{}},
{" ", []string{}, []string{}},
{"\n", []string{}, []string{}},
{"\t\n\t", []string{}, []string{}},
{"#comment\n", []string{}, []string{}},
{" #comment\n", []string{}, []string{}},
{"#comment\n#comment", []string{}, []string{}},
{"#comment\nnameserver", []string{}, []string{}},
{"#comment\nnameserver\nsearch", []string{}, []string{}},
{"nameserver 1.2.3.4", []string{"1.2.3.4"}, []string{}},
{" nameserver 1.2.3.4", []string{"1.2.3.4"}, []string{}},
{"\tnameserver 1.2.3.4", []string{"1.2.3.4"}, []string{}},
{"nameserver\t1.2.3.4", []string{"1.2.3.4"}, []string{}},
{"nameserver \t 1.2.3.4", []string{"1.2.3.4"}, []string{}},
{"nameserver 1.2.3.4\nnameserver 5.6.7.8", []string{"1.2.3.4", "5.6.7.8"}, []string{}},
{"search foo", []string{}, []string{"foo"}},
{"search foo bar", []string{}, []string{"foo", "bar"}},
{"search foo bar bat\n", []string{}, []string{"foo", "bar", "bat"}},
{"search foo\nsearch bar", []string{}, []string{"bar"}},
{"nameserver 1.2.3.4\nsearch foo bar", []string{"1.2.3.4"}, []string{"foo", "bar"}},
{"nameserver 1.2.3.4\nsearch foo\nnameserver 5.6.7.8\nsearch bar", []string{"1.2.3.4", "5.6.7.8"}, []string{"bar"}},
{"#comment\nnameserver 1.2.3.4\n#comment\nsearch foo\ncomment", []string{"1.2.3.4"}, []string{"foo"}},
}
for i, tc := range testCases {
ns, srch, err := parseResolvConf(strings.NewReader(tc.data))
if err != nil {
t.Errorf("expected success, got %v", err)
continue
}
if !reflect.DeepEqual(ns, tc.nameservers) {
t.Errorf("[%d] expected nameservers %#v, got %#v", i, tc.nameservers, ns)
}
if !reflect.DeepEqual(srch, tc.searches) {
t.Errorf("[%d] expected searches %#v, got %#v", i, tc.searches, srch)
}
}
}
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
}
func (ls testNodeLister) GetNodeInfo(id string) (*api.Node, error) {
return nil, errors.New("not implemented")
}
func (ls testNodeLister) List() (api.NodeList, error) {
return api.NodeList{
Items: ls.nodes,
}, nil
}
func TestMakeEnvironmentVariables(t *testing.T) {
services := []api.Service{
{
ObjectMeta: api.ObjectMeta{Name: "kubernetes", Namespace: api.NamespaceDefault},
Spec: api.ServiceSpec{
Ports: []api.ServicePort{{
Protocol: "TCP",
Port: 8081,
}},
PortalIP: "1.2.3.1",
},
},
{
ObjectMeta: api.ObjectMeta{Name: "kubernetes-ro", Namespace: api.NamespaceDefault},
Spec: api.ServiceSpec{
Ports: []api.ServicePort{{
Protocol: "TCP",
Port: 8082,
}},
PortalIP: "1.2.3.2",
},
},
{
ObjectMeta: api.ObjectMeta{Name: "kubernetes-ro", Namespace: api.NamespaceDefault},
Spec: api.ServiceSpec{
Ports: []api.ServicePort{{
Protocol: "TCP",
Port: 8082,
}},
PortalIP: "None",
},
},
{
ObjectMeta: api.ObjectMeta{Name: "kubernetes-ro", Namespace: api.NamespaceDefault},
Spec: api.ServiceSpec{
Ports: []api.ServicePort{{
Protocol: "TCP",
Port: 8082,
}},
PortalIP: "",
},
},
{
ObjectMeta: api.ObjectMeta{Name: "test", Namespace: "test1"},
Spec: api.ServiceSpec{
Ports: []api.ServicePort{{
Protocol: "TCP",
Port: 8083,
}},
PortalIP: "1.2.3.3",
},
},
{
ObjectMeta: api.ObjectMeta{Name: "kubernetes", Namespace: "test2"},
Spec: api.ServiceSpec{
Ports: []api.ServicePort{{
Protocol: "TCP",
Port: 8084,
}},
PortalIP: "1.2.3.4",
},
},
{
ObjectMeta: api.ObjectMeta{Name: "test", Namespace: "test2"},
Spec: api.ServiceSpec{
Ports: []api.ServicePort{{
Protocol: "TCP",
Port: 8085,
}},
PortalIP: "1.2.3.5",
},
},
{
ObjectMeta: api.ObjectMeta{Name: "test", Namespace: "test2"},
Spec: api.ServiceSpec{
Ports: []api.ServicePort{{
Protocol: "TCP",
Port: 8085,
}},
PortalIP: "None",
},
},
{
ObjectMeta: api.ObjectMeta{Name: "test", Namespace: "test2"},
Spec: api.ServiceSpec{
Ports: []api.ServicePort{{
Protocol: "TCP",
Port: 8085,
}},
},
},
{
ObjectMeta: api.ObjectMeta{Name: "kubernetes", Namespace: "kubernetes"},
Spec: api.ServiceSpec{
Ports: []api.ServicePort{{
Protocol: "TCP",
Port: 8086,
}},
PortalIP: "1.2.3.6",
},
},
{
ObjectMeta: api.ObjectMeta{Name: "kubernetes-ro", Namespace: "kubernetes"},
Spec: api.ServiceSpec{
Ports: []api.ServicePort{{
Protocol: "TCP",
Port: 8087,
}},
PortalIP: "1.2.3.7",
},
},
{
ObjectMeta: api.ObjectMeta{Name: "not-special", Namespace: "kubernetes"},
Spec: api.ServiceSpec{
Ports: []api.ServicePort{{
Protocol: "TCP",
Port: 8088,
}},
PortalIP: "1.2.3.8",
},
},
{
ObjectMeta: api.ObjectMeta{Name: "not-special", Namespace: "kubernetes"},
Spec: api.ServiceSpec{
Ports: []api.ServicePort{{
Protocol: "TCP",
Port: 8088,
}},
PortalIP: "None",
},
},
{
ObjectMeta: api.ObjectMeta{Name: "not-special", Namespace: "kubernetes"},
Spec: api.ServiceSpec{
Ports: []api.ServicePort{{
Protocol: "TCP",
Port: 8088,
}},
PortalIP: "",
},
},
}
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
masterServiceNamespace string // the namespace to read master service info from
nilLister bool // whether the lister should be nil
expectedEnvs util.StringSet // a set of expected environment vars
expectedEnvSize int // total number of expected env vars
}{
{
"api server = Y, kubelet = Y",
"test1",
&api.Container{
Env: []api.EnvVar{
{Name: "FOO", Value: "BAR"},
{Name: "TEST_SERVICE_HOST", Value: "1.2.3.3"},
{Name: "TEST_SERVICE_PORT", Value: "8083"},
{Name: "TEST_PORT", Value: "tcp://1.2.3.3:8083"},
{Name: "TEST_PORT_8083_TCP", Value: "tcp://1.2.3.3:8083"},
{Name: "TEST_PORT_8083_TCP_PROTO", Value: "tcp"},
{Name: "TEST_PORT_8083_TCP_PORT", Value: "8083"},
{Name: "TEST_PORT_8083_TCP_ADDR", Value: "1.2.3.3"},
},
},
api.NamespaceDefault,
false,
util.NewStringSet("FOO=BAR",
"TEST_SERVICE_HOST=1.2.3.3",
"TEST_SERVICE_PORT=8083",
"TEST_PORT=tcp://1.2.3.3:8083",
"TEST_PORT_8083_TCP=tcp://1.2.3.3:8083",
"TEST_PORT_8083_TCP_PROTO=tcp",
"TEST_PORT_8083_TCP_PORT=8083",
"TEST_PORT_8083_TCP_ADDR=1.2.3.3",
"KUBERNETES_SERVICE_HOST=1.2.3.1",
"KUBERNETES_SERVICE_PORT=8081",
"KUBERNETES_PORT=tcp://1.2.3.1:8081",
"KUBERNETES_PORT_8081_TCP=tcp://1.2.3.1:8081",
"KUBERNETES_PORT_8081_TCP_PROTO=tcp",
"KUBERNETES_PORT_8081_TCP_PORT=8081",
"KUBERNETES_PORT_8081_TCP_ADDR=1.2.3.1",
"KUBERNETES_RO_SERVICE_HOST=1.2.3.2",
"KUBERNETES_RO_SERVICE_PORT=8082",
"KUBERNETES_RO_PORT=tcp://1.2.3.2:8082",
"KUBERNETES_RO_PORT_8082_TCP=tcp://1.2.3.2:8082",
"KUBERNETES_RO_PORT_8082_TCP_PROTO=tcp",
"KUBERNETES_RO_PORT_8082_TCP_PORT=8082",
"KUBERNETES_RO_PORT_8082_TCP_ADDR=1.2.3.2"),
22,
},
{
"api server = Y, kubelet = N",
"test1",
&api.Container{
Env: []api.EnvVar{
{Name: "FOO", Value: "BAR"},
{Name: "TEST_SERVICE_HOST", Value: "1.2.3.3"},
{Name: "TEST_SERVICE_PORT", Value: "8083"},
{Name: "TEST_PORT", Value: "tcp://1.2.3.3:8083"},
{Name: "TEST_PORT_8083_TCP", Value: "tcp://1.2.3.3:8083"},
{Name: "TEST_PORT_8083_TCP_PROTO", Value: "tcp"},
{Name: "TEST_PORT_8083_TCP_PORT", Value: "8083"},
{Name: "TEST_PORT_8083_TCP_ADDR", Value: "1.2.3.3"},
},
},
api.NamespaceDefault,
true,
util.NewStringSet("FOO=BAR",
"TEST_SERVICE_HOST=1.2.3.3",
"TEST_SERVICE_PORT=8083",
"TEST_PORT=tcp://1.2.3.3:8083",
"TEST_PORT_8083_TCP=tcp://1.2.3.3:8083",
"TEST_PORT_8083_TCP_PROTO=tcp",
"TEST_PORT_8083_TCP_PORT=8083",
"TEST_PORT_8083_TCP_ADDR=1.2.3.3"),
8,
},
{
"api server = N; kubelet = Y",
"test1",
&api.Container{
Env: []api.EnvVar{
{Name: "FOO", Value: "BAZ"},
},
},
api.NamespaceDefault,
false,
util.NewStringSet("FOO=BAZ",
"TEST_SERVICE_HOST=1.2.3.3",
"TEST_SERVICE_PORT=8083",
"TEST_PORT=tcp://1.2.3.3:8083",
"TEST_PORT_8083_TCP=tcp://1.2.3.3:8083",
"TEST_PORT_8083_TCP_PROTO=tcp",
"TEST_PORT_8083_TCP_PORT=8083",
"TEST_PORT_8083_TCP_ADDR=1.2.3.3",
"KUBERNETES_SERVICE_HOST=1.2.3.1",
"KUBERNETES_SERVICE_PORT=8081",
"KUBERNETES_PORT=tcp://1.2.3.1:8081",
"KUBERNETES_PORT_8081_TCP=tcp://1.2.3.1:8081",
"KUBERNETES_PORT_8081_TCP_PROTO=tcp",
"KUBERNETES_PORT_8081_TCP_PORT=8081",
"KUBERNETES_PORT_8081_TCP_ADDR=1.2.3.1",
"KUBERNETES_RO_SERVICE_HOST=1.2.3.2",
"KUBERNETES_RO_SERVICE_PORT=8082",
"KUBERNETES_RO_PORT=tcp://1.2.3.2:8082",
"KUBERNETES_RO_PORT_8082_TCP=tcp://1.2.3.2:8082",
"KUBERNETES_RO_PORT_8082_TCP_PROTO=tcp",
"KUBERNETES_RO_PORT_8082_TCP_PORT=8082",
"KUBERNETES_RO_PORT_8082_TCP_ADDR=1.2.3.2"),
22,
},
{
"master service in pod ns",
"test2",
&api.Container{
Env: []api.EnvVar{
{Name: "FOO", Value: "ZAP"},
},
},
"kubernetes",
false,
util.NewStringSet("FOO=ZAP",
"TEST_SERVICE_HOST=1.2.3.5",
"TEST_SERVICE_PORT=8085",
"TEST_PORT=tcp://1.2.3.5:8085",
"TEST_PORT_8085_TCP=tcp://1.2.3.5:8085",
"TEST_PORT_8085_TCP_PROTO=tcp",
"TEST_PORT_8085_TCP_PORT=8085",
"TEST_PORT_8085_TCP_ADDR=1.2.3.5",
"KUBERNETES_SERVICE_HOST=1.2.3.4",
"KUBERNETES_SERVICE_PORT=8084",
"KUBERNETES_PORT=tcp://1.2.3.4:8084",
"KUBERNETES_PORT_8084_TCP=tcp://1.2.3.4:8084",
"KUBERNETES_PORT_8084_TCP_PROTO=tcp",
"KUBERNETES_PORT_8084_TCP_PORT=8084",
"KUBERNETES_PORT_8084_TCP_ADDR=1.2.3.4",
"KUBERNETES_RO_SERVICE_HOST=1.2.3.7",
"KUBERNETES_RO_SERVICE_PORT=8087",
"KUBERNETES_RO_PORT=tcp://1.2.3.7:8087",
"KUBERNETES_RO_PORT_8087_TCP=tcp://1.2.3.7:8087",
"KUBERNETES_RO_PORT_8087_TCP_PROTO=tcp",
"KUBERNETES_RO_PORT_8087_TCP_PORT=8087",
"KUBERNETES_RO_PORT_8087_TCP_ADDR=1.2.3.7"),
22,
},
{
"pod in master service ns",
"kubernetes",
&api.Container{},
"kubernetes",
false,
util.NewStringSet(
"NOT_SPECIAL_SERVICE_HOST=1.2.3.8",
"NOT_SPECIAL_SERVICE_PORT=8088",
"NOT_SPECIAL_PORT=tcp://1.2.3.8:8088",
"NOT_SPECIAL_PORT_8088_TCP=tcp://1.2.3.8:8088",
"NOT_SPECIAL_PORT_8088_TCP_PROTO=tcp",
"NOT_SPECIAL_PORT_8088_TCP_PORT=8088",
"NOT_SPECIAL_PORT_8088_TCP_ADDR=1.2.3.8",
"KUBERNETES_SERVICE_HOST=1.2.3.6",
"KUBERNETES_SERVICE_PORT=8086",
"KUBERNETES_PORT=tcp://1.2.3.6:8086",
"KUBERNETES_PORT_8086_TCP=tcp://1.2.3.6:8086",
"KUBERNETES_PORT_8086_TCP_PROTO=tcp",
"KUBERNETES_PORT_8086_TCP_PORT=8086",
"KUBERNETES_PORT_8086_TCP_ADDR=1.2.3.6",
"KUBERNETES_RO_SERVICE_HOST=1.2.3.7",
"KUBERNETES_RO_SERVICE_PORT=8087",
"KUBERNETES_RO_PORT=tcp://1.2.3.7:8087",
"KUBERNETES_RO_PORT_8087_TCP=tcp://1.2.3.7:8087",
"KUBERNETES_RO_PORT_8087_TCP_PROTO=tcp",
"KUBERNETES_RO_PORT_8087_TCP_PORT=8087",
"KUBERNETES_RO_PORT_8087_TCP_ADDR=1.2.3.7"),
21,
},
}
for _, tc := range testCases {
testKubelet := newTestKubelet(t)
kl := testKubelet.kubelet
kl.masterServiceNamespace = tc.masterServiceNamespace
if tc.nilLister {
kl.serviceLister = nil
} else {
kl.serviceLister = testServiceLister{services}
}
result, err := kl.makeEnvironmentVariables(tc.ns, tc.container)
if err != nil {
t.Errorf("[%v] Unexpected error: %v", tc.name, err)
}
resultSet := util.NewStringSet(result...)
if !resultSet.IsSuperset(tc.expectedEnvs) {
t.Errorf("[%v] Unexpected env entries; expected {%v}, got {%v}", tc.name, tc.expectedEnvs, resultSet)
}
if a := len(resultSet); a != tc.expectedEnvSize {
t.Errorf("[%v] Unexpected number of env vars; expected %v, got %v", tc.name, tc.expectedEnvSize, a)
}
}
}
func runningState(cName string) api.ContainerStatus {
return api.ContainerStatus{
Name: cName,
State: api.ContainerState{
Running: &api.ContainerStateRunning{},
},
}
}
func stoppedState(cName string) api.ContainerStatus {
return api.ContainerStatus{
Name: cName,
State: api.ContainerState{
Termination: &api.ContainerStateTerminated{},
},
}
}
func succeededState(cName string) api.ContainerStatus {
return api.ContainerStatus{
Name: cName,
State: api.ContainerState{
Termination: &api.ContainerStateTerminated{
ExitCode: 0,
},
},
}
}
func failedState(cName string) api.ContainerStatus {
return api.ContainerStatus{
Name: cName,
State: api.ContainerState{
Termination: &api.ContainerStateTerminated{
ExitCode: -1,
},
},
}
}
func TestPodPhaseWithRestartAlways(t *testing.T) {
desiredState := api.PodSpec{
Host: "machine",
Containers: []api.Container{
{Name: "containerA"},
{Name: "containerB"},
},
RestartPolicy: api.RestartPolicyAlways,
}
tests := []struct {
pod *api.Pod
status api.PodPhase
test string
}{
{&api.Pod{Spec: desiredState, Status: api.PodStatus{}}, api.PodPending, "waiting"},
{
&api.Pod{
Spec: desiredState,
Status: api.PodStatus{
ContainerStatuses: []api.ContainerStatus{
runningState("containerA"),
runningState("containerB"),
},
},
},
api.PodRunning,
"all running",
},
{
&api.Pod{
Spec: desiredState,
Status: api.PodStatus{
ContainerStatuses: []api.ContainerStatus{
stoppedState("containerA"),
stoppedState("containerB"),
},
},
},
api.PodRunning,
"all stopped with restart always",
},
{
&api.Pod{
Spec: desiredState,
Status: api.PodStatus{
ContainerStatuses: []api.ContainerStatus{
runningState("containerA"),
stoppedState("containerB"),
},
},
},
api.PodRunning,
"mixed state #1 with restart always",
},
{
&api.Pod{
Spec: desiredState,
Status: api.PodStatus{
ContainerStatuses: []api.ContainerStatus{
runningState("containerA"),
},
},
},
api.PodPending,
"mixed state #2 with restart always",
},
}
for _, test := range tests {
if status := getPhase(&test.pod.Spec, test.pod.Status.ContainerStatuses); status != test.status {
t.Errorf("In test %s, expected %v, got %v", test.test, test.status, status)
}
}
}
func TestPodPhaseWithRestartNever(t *testing.T) {
desiredState := api.PodSpec{
Host: "machine",
Containers: []api.Container{
{Name: "containerA"},
{Name: "containerB"},
},
RestartPolicy: api.RestartPolicyNever,
}
tests := []struct {
pod *api.Pod
status api.PodPhase
test string
}{
{&api.Pod{Spec: desiredState, Status: api.PodStatus{}}, api.PodPending, "waiting"},
{
&api.Pod{
Spec: desiredState,
Status: api.PodStatus{
ContainerStatuses: []api.ContainerStatus{
runningState("containerA"),
runningState("containerB"),
},
},
},
api.PodRunning,
"all running with restart never",
},
{
&api.Pod{
Spec: desiredState,
Status: api.PodStatus{
ContainerStatuses: []api.ContainerStatus{
succeededState("containerA"),
succeededState("containerB"),
},
},
},
api.PodSucceeded,
"all succeeded with restart never",
},
{
&api.Pod{
Spec: desiredState,
Status: api.PodStatus{
ContainerStatuses: []api.ContainerStatus{
failedState("containerA"),
failedState("containerB"),
},
},
},
api.PodFailed,
"all failed with restart never",
},
{
&api.Pod{
Spec: desiredState,
Status: api.PodStatus{
ContainerStatuses: []api.ContainerStatus{
runningState("containerA"),
succeededState("containerB"),
},
},
},
api.PodRunning,
"mixed state #1 with restart never",
},
{
&api.Pod{
Spec: desiredState,
Status: api.PodStatus{
ContainerStatuses: []api.ContainerStatus{
runningState("containerA"),
},
},
},
api.PodPending,
"mixed state #2 with restart never",
},
}
for _, test := range tests {
if status := getPhase(&test.pod.Spec, test.pod.Status.ContainerStatuses); status != test.status {
t.Errorf("In test %s, expected %v, got %v", test.test, test.status, status)
}
}
}
func TestPodPhaseWithRestartOnFailure(t *testing.T) {
desiredState := api.PodSpec{
Host: "machine",
Containers: []api.Container{
{Name: "containerA"},
{Name: "containerB"},
},
RestartPolicy: api.RestartPolicyOnFailure,
}
tests := []struct {
pod *api.Pod
status api.PodPhase
test string
}{
{&api.Pod{Spec: desiredState, Status: api.PodStatus{}}, api.PodPending, "waiting"},
{
&api.Pod{
Spec: desiredState,
Status: api.PodStatus{
ContainerStatuses: []api.ContainerStatus{
runningState("containerA"),
runningState("containerB"),
},
},
},
api.PodRunning,
"all running with restart onfailure",
},
{
&api.Pod{
Spec: desiredState,
Status: api.PodStatus{
ContainerStatuses: []api.ContainerStatus{
succeededState("containerA"),
succeededState("containerB"),
},
},
},
api.PodSucceeded,
"all succeeded with restart onfailure",
},
{
&api.Pod{
Spec: desiredState,
Status: api.PodStatus{
ContainerStatuses: []api.ContainerStatus{
failedState("containerA"),
failedState("containerB"),
},
},
},
api.PodRunning,
"all failed with restart never",
},
{
&api.Pod{
Spec: desiredState,
Status: api.PodStatus{
ContainerStatuses: []api.ContainerStatus{
runningState("containerA"),
succeededState("containerB"),
},
},
},
api.PodRunning,
"mixed state #1 with restart onfailure",
},
{
&api.Pod{
Spec: desiredState,
Status: api.PodStatus{
ContainerStatuses: []api.ContainerStatus{
runningState("containerA"),
},
},
},
api.PodPending,
"mixed state #2 with restart onfailure",
},
}
for _, test := range tests {
if status := getPhase(&test.pod.Spec, test.pod.Status.ContainerStatuses); status != test.status {
t.Errorf("In test %s, expected %v, got %v", test.test, test.status, status)
}
}
}
func getReadyStatus(cName string) api.ContainerStatus {
return api.ContainerStatus{
Name: cName,
Ready: true,
}
}
func getNotReadyStatus(cName string) api.ContainerStatus {
return api.ContainerStatus{
Name: cName,
Ready: false,
}
}
func TestGetPodReadyCondition(t *testing.T) {
ready := []api.PodCondition{{
Type: api.PodReady,
Status: api.ConditionTrue,
}}
unready := []api.PodCondition{{
Type: api.PodReady,
Status: api.ConditionFalse,
}}
tests := []struct {
spec *api.PodSpec
info []api.ContainerStatus
expected []api.PodCondition
}{
{
spec: nil,
info: nil,
expected: unready,
},
{
spec: &api.PodSpec{},
info: []api.ContainerStatus{},
expected: ready,
},
{
spec: &api.PodSpec{
Containers: []api.Container{
{Name: "1234"},
},
},
info: []api.ContainerStatus{},
expected: unready,
},
{
spec: &api.PodSpec{
Containers: []api.Container{
{Name: "1234"},
},
},
info: []api.ContainerStatus{
getReadyStatus("1234"),
},
expected: ready,
},
{
spec: &api.PodSpec{
Containers: []api.Container{
{Name: "1234"},
{Name: "5678"},
},
},
info: []api.ContainerStatus{
getReadyStatus("1234"),
getReadyStatus("5678"),
},
expected: ready,
},
{
spec: &api.PodSpec{
Containers: []api.Container{
{Name: "1234"},
{Name: "5678"},
},
},
info: []api.ContainerStatus{
getReadyStatus("1234"),
},
expected: unready,
},
{
spec: &api.PodSpec{
Containers: []api.Container{
{Name: "1234"},
{Name: "5678"},
},
},
info: []api.ContainerStatus{
getReadyStatus("1234"),
getNotReadyStatus("5678"),
},
expected: unready,
},
}
for i, test := range tests {
condition := getPodReadyCondition(test.spec, test.info)
if !reflect.DeepEqual(condition, test.expected) {
t.Errorf("On test case %v, expected:\n%+v\ngot\n%+v\n", i, test.expected, condition)
}
}
}
func TestExecInContainerNoSuchPod(t *testing.T) {
fakeCommandRunner := fakeContainerCommandRunner{}
testKubelet := newTestKubelet(t)
kubelet := testKubelet.kubelet
fakeDocker := testKubelet.fakeDocker
fakeDocker.ContainerList = []docker.APIContainers{}
kubelet.runner = &fakeCommandRunner
podName := "podFoo"
podNamespace := "nsFoo"
containerName := "containerFoo"
err := kubelet.ExecInContainer(
kubecontainer.GetPodFullName(&api.Pod{ObjectMeta: api.ObjectMeta{Name: podName, Namespace: podNamespace}}),
"",
containerName,
[]string{"ls"},
nil,
nil,
nil,
false,
)
if err == nil {
t.Fatal("unexpected non-error")
}
if fakeCommandRunner.ID != "" {
t.Fatal("unexpected invocation of runner.ExecInContainer")
}
}
func TestExecInContainerNoSuchContainer(t *testing.T) {
fakeCommandRunner := fakeContainerCommandRunner{}
testKubelet := newTestKubelet(t)
kubelet := testKubelet.kubelet
fakeDocker := testKubelet.fakeDocker
kubelet.runner = &fakeCommandRunner
podName := "podFoo"
podNamespace := "nsFoo"
containerID := "containerFoo"
fakeDocker.ContainerList = []docker.APIContainers{
{
ID: "notfound",
Names: []string{"/k8s_notfound_" + podName + "_" + podNamespace + "_12345678_42"},
},
}
err := kubelet.ExecInContainer(
kubecontainer.GetPodFullName(&api.Pod{ObjectMeta: api.ObjectMeta{
UID: "12345678",
Name: podName,
Namespace: podNamespace,
}}),
"",
containerID,
[]string{"ls"},
nil,
nil,
nil,
false,
)
if err == nil {
t.Fatal("unexpected non-error")
}
if fakeCommandRunner.ID != "" {
t.Fatal("unexpected invocation of runner.ExecInContainer")
}
}
type fakeReadWriteCloser struct{}
func (f *fakeReadWriteCloser) Write(data []byte) (int, error) {
return 0, nil
}
func (f *fakeReadWriteCloser) Read(data []byte) (int, error) {
return 0, nil
}
func (f *fakeReadWriteCloser) Close() error {
return nil
}
func TestExecInContainer(t *testing.T) {
fakeCommandRunner := fakeContainerCommandRunner{}
testKubelet := newTestKubelet(t)
kubelet := testKubelet.kubelet
fakeDocker := testKubelet.fakeDocker
kubelet.runner = &fakeCommandRunner
podName := "podFoo"
podNamespace := "nsFoo"
containerID := "containerFoo"
command := []string{"ls"}
stdin := &bytes.Buffer{}
stdout := &fakeReadWriteCloser{}
stderr := &fakeReadWriteCloser{}
tty := true
fakeDocker.ContainerList = []docker.APIContainers{
{
ID: containerID,
Names: []string{"/k8s_" + containerID + "_" + podName + "_" + podNamespace + "_12345678_42"},
},
}
err := kubelet.ExecInContainer(
kubecontainer.GetPodFullName(&api.Pod{ObjectMeta: api.ObjectMeta{
UID: "12345678",
Name: podName,
Namespace: podNamespace,
}}),
"",
containerID,
[]string{"ls"},
stdin,
stdout,
stderr,
tty,
)
if err != nil {
t.Fatalf("unexpected error: %s", err)
}
if e, a := containerID, fakeCommandRunner.ID; e != a {
t.Fatalf("container id: expected %s, got %s", e, a)
}
if e, a := command, fakeCommandRunner.Cmd; !reflect.DeepEqual(e, a) {
t.Fatalf("command: expected '%v', got '%v'", e, a)
}
if e, a := stdin, fakeCommandRunner.Stdin; e != a {
t.Fatalf("stdin: expected %#v, got %#v", e, a)
}
if e, a := stdout, fakeCommandRunner.Stdout; e != a {
t.Fatalf("stdout: expected %#v, got %#v", e, a)
}
if e, a := stderr, fakeCommandRunner.Stderr; e != a {
t.Fatalf("stderr: expected %#v, got %#v", e, a)
}
if e, a := tty, fakeCommandRunner.TTY; e != a {
t.Fatalf("tty: expected %t, got %t", e, a)
}
}
func TestPortForwardNoSuchPod(t *testing.T) {
fakeCommandRunner := fakeContainerCommandRunner{}
testKubelet := newTestKubelet(t)
kubelet := testKubelet.kubelet
fakeDocker := testKubelet.fakeDocker
fakeDocker.ContainerList = []docker.APIContainers{}
kubelet.runner = &fakeCommandRunner
podName := "podFoo"
podNamespace := "nsFoo"
var port uint16 = 5000
err := kubelet.PortForward(
kubecontainer.GetPodFullName(&api.Pod{ObjectMeta: api.ObjectMeta{Name: podName, Namespace: podNamespace}}),
"",
port,
nil,
)
if err == nil {
t.Fatal("unexpected non-error")
}
if fakeCommandRunner.ID != "" {
t.Fatal("unexpected invocation of runner.PortForward")
}
}
func TestPortForwardNoSuchContainer(t *testing.T) {
fakeCommandRunner := fakeContainerCommandRunner{}
testKubelet := newTestKubelet(t)
kubelet := testKubelet.kubelet
fakeDocker := testKubelet.fakeDocker
kubelet.runner = &fakeCommandRunner
podName := "podFoo"
podNamespace := "nsFoo"
var port uint16 = 5000
fakeDocker.ContainerList = []docker.APIContainers{
{
ID: "notfound",
Names: []string{"/k8s_notfound_" + podName + "_" + podNamespace + "_12345678_42"},
},
}
err := kubelet.PortForward(
kubecontainer.GetPodFullName(&api.Pod{ObjectMeta: api.ObjectMeta{
UID: "12345678",
Name: podName,
Namespace: podNamespace,
}}),
"",
port,
nil,
)
if err == nil {
t.Fatal("unexpected non-error")
}
if fakeCommandRunner.ID != "" {
t.Fatal("unexpected invocation of runner.PortForward")
}
}
func TestPortForward(t *testing.T) {
fakeCommandRunner := fakeContainerCommandRunner{}
testKubelet := newTestKubelet(t)
kubelet := testKubelet.kubelet
fakeDocker := testKubelet.fakeDocker
kubelet.runner = &fakeCommandRunner
podName := "podFoo"
podNamespace := "nsFoo"
containerID := "containerFoo"
var port uint16 = 5000
stream := &fakeReadWriteCloser{}
podInfraContainerImage := "POD"
infraContainerID := "infra"
kubelet.containerManager.PodInfraContainerImage = podInfraContainerImage
fakeDocker.ContainerList = []docker.APIContainers{
{
ID: infraContainerID,
Names: []string{"/k8s_" + podInfraContainerImage + "_" + podName + "_" + podNamespace + "_12345678_42"},
},
{
ID: containerID,
Names: []string{"/k8s_" + containerID + "_" + podName + "_" + podNamespace + "_12345678_42"},
},
}
err := kubelet.PortForward(
kubecontainer.GetPodFullName(&api.Pod{ObjectMeta: api.ObjectMeta{
UID: "12345678",
Name: podName,
Namespace: podNamespace,
}}),
"",
port,
stream,
)
if err != nil {
t.Fatalf("unexpected error: %s", err)
}
if e, a := infraContainerID, fakeCommandRunner.ID; e != a {
t.Fatalf("container id: expected %s, got %s", e, a)
}
if e, a := port, fakeCommandRunner.Port; e != a {
t.Fatalf("port: expected %v, got %v", e, a)
}
if e, a := stream, fakeCommandRunner.Stream; e != a {
t.Fatalf("stream: expected %v, got %v", e, a)
}
}
// Tests that identify the host port conflicts are detected correctly.
func TestGetHostPortConflicts(t *testing.T) {
pods := []api.Pod{
{Spec: api.PodSpec{Containers: []api.Container{{Ports: []api.ContainerPort{{HostPort: 80}}}}}},
{Spec: api.PodSpec{Containers: []api.Container{{Ports: []api.ContainerPort{{HostPort: 81}}}}}},
{Spec: api.PodSpec{Containers: []api.Container{{Ports: []api.ContainerPort{{HostPort: 82}}}}}},
{Spec: api.PodSpec{Containers: []api.Container{{Ports: []api.ContainerPort{{HostPort: 83}}}}}},
}
// Pods should not cause any conflict.
_, conflicts := checkHostPortConflicts(pods)
if len(conflicts) != 0 {
t.Errorf("expected no conflicts, Got %#v", conflicts)
}
// The new pod should cause conflict and be reported.
expected := api.Pod{
Spec: api.PodSpec{Containers: []api.Container{{Ports: []api.ContainerPort{{HostPort: 81}}}}},
}
pods = append(pods, expected)
if _, actual := checkHostPortConflicts(pods); !reflect.DeepEqual(actual, []api.Pod{expected}) {
t.Errorf("expected %#v, Got %#v", expected, actual)
}
}
// Tests that we handle port conflicts correctly by setting the failed status in status map.
func TestHandlePortConflicts(t *testing.T) {
testKubelet := newTestKubelet(t)
kl := testKubelet.kubelet
testKubelet.fakeCadvisor.On("MachineInfo").Return(&cadvisorApi.MachineInfo{}, nil)
spec := api.PodSpec{Containers: []api.Container{{Ports: []api.ContainerPort{{HostPort: 80}}}}}
pods := []api.Pod{
{
ObjectMeta: api.ObjectMeta{
UID: "123456789",
Name: "newpod",
Namespace: "foo",
},
Spec: spec,
},
{
ObjectMeta: api.ObjectMeta{
UID: "987654321",
Name: "oldpod",
Namespace: "foo",
},
Spec: spec,
},
}
// Make sure the Pods are in the reverse order of creation time.
pods[1].CreationTimestamp = util.NewTime(time.Now())
pods[0].CreationTimestamp = util.NewTime(time.Now().Add(1 * time.Second))
// The newer pod should be rejected.
conflictedPodName := kubecontainer.GetPodFullName(&pods[0])
kl.handleNotFittingPods(pods)
// Check pod status stored in the status map.
status, err := kl.GetPodStatus(conflictedPodName)
if err != nil {
t.Fatalf("status of pod %q is not found in the status map: %#v", conflictedPodName, err)
}
if status.Phase != api.PodFailed {
t.Fatalf("expected pod status %q. Got %q.", api.PodFailed, status.Phase)
}
// Check if we can retrieve the pod status from GetPodStatus().
kl.podManager.SetPods(pods)
status, err = kl.GetPodStatus(conflictedPodName)
if err != nil {
t.Fatalf("unable to retrieve pod status for pod %q: %#v.", conflictedPodName, err)
}
if status.Phase != api.PodFailed {
t.Fatalf("expected pod status %q. Got %q.", api.PodFailed, 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)
kl := testKubelet.kubelet
kl.nodeLister = testNodeLister{nodes: []api.Node{
{ObjectMeta: api.ObjectMeta{Name: "testnode", Labels: map[string]string{"key": "B"}}},
}}
testKubelet.fakeCadvisor.On("MachineInfo").Return(&cadvisorApi.MachineInfo{}, nil)
pods := []api.Pod{
{
ObjectMeta: api.ObjectMeta{
UID: "123456789",
Name: "podA",
Namespace: "foo",
},
Spec: api.PodSpec{NodeSelector: map[string]string{"key": "A"}},
},
{
ObjectMeta: api.ObjectMeta{
UID: "987654321",
Name: "podB",
Namespace: "foo",
},
Spec: api.PodSpec{NodeSelector: map[string]string{"key": "B"}},
},
}
// The first pod should be rejected.
notfittingPodName := kubecontainer.GetPodFullName(&pods[0])
kl.handleNotFittingPods(pods)
// Check pod status stored in the status map.
status, err := kl.GetPodStatus(notfittingPodName)
if err != nil {
t.Fatalf("status of pod %q is not found in the status map: %#v", notfittingPodName, err)
}
if status.Phase != api.PodFailed {
t.Fatalf("expected pod status %q. Got %q.", api.PodFailed, status.Phase)
}
// Check if we can retrieve the pod status from GetPodStatus().
kl.podManager.SetPods(pods)
status, err = kl.GetPodStatus(notfittingPodName)
if err != nil {
t.Fatalf("unable to retrieve pod status for pod %q: %#v.", notfittingPodName, err)
}
if status.Phase != api.PodFailed {
t.Fatalf("expected pod status %q. Got %q.", api.PodFailed, 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)
kl := testKubelet.kubelet
testKubelet.fakeCadvisor.On("MachineInfo").Return(&cadvisorApi.MachineInfo{MemoryCapacity: 100}, nil)
spec := api.PodSpec{Containers: []api.Container{{Resources: api.ResourceRequirements{
Limits: api.ResourceList{
"memory": resource.MustParse("90"),
},
}}}}
pods := []api.Pod{
{
ObjectMeta: api.ObjectMeta{
UID: "123456789",
Name: "newpod",
Namespace: "foo",
},
Spec: spec,
},
{
ObjectMeta: api.ObjectMeta{
UID: "987654321",
Name: "oldpod",
Namespace: "foo",
},
Spec: spec,
},
}
// Make sure the Pods are in the reverse order of creation time.
pods[1].CreationTimestamp = util.NewTime(time.Now())
pods[0].CreationTimestamp = util.NewTime(time.Now().Add(1 * time.Second))
// The newer pod should be rejected.
notfittingPodName := kubecontainer.GetPodFullName(&pods[0])
kl.handleNotFittingPods(pods)
// Check pod status stored in the status map.
status, err := kl.GetPodStatus(notfittingPodName)
if err != nil {
t.Fatalf("status of pod %q is not found in the status map: %#v", notfittingPodName, err)
}
if status.Phase != api.PodFailed {
t.Fatalf("expected pod status %q. Got %q.", api.PodFailed, status.Phase)
}
// Check if we can retrieve the pod status from GetPodStatus().
kl.podManager.SetPods(pods)
status, err = kl.GetPodStatus(notfittingPodName)
if err != nil {
t.Fatalf("unable to retrieve pod status for pod %q: %#v.", notfittingPodName, err)
}
if status.Phase != api.PodFailed {
t.Fatalf("expected pod status %q. Got %q.", api.PodFailed, 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)
testKubelet.fakeCadvisor.On("MachineInfo").Return(&cadvisorApi.MachineInfo{}, nil)
kl := testKubelet.kubelet
pods := []api.Pod{
{ObjectMeta: api.ObjectMeta{Name: "pod1"}, Spec: api.PodSpec{Containers: []api.Container{{Ports: []api.ContainerPort{{HostPort: 80}}}}}},
{ObjectMeta: api.ObjectMeta{Name: "pod2"}, Spec: api.PodSpec{Containers: []api.Container{{Ports: []api.ContainerPort{{HostPort: 80}}}}}},
}
// Run once to populate the status map.
kl.handleNotFittingPods(pods)
if _, err := kl.GetPodStatus(kubecontainer.BuildPodFullName("pod2", "")); err != nil {
t.Fatalf("expected to have status cached for %q: %v", "pod2", err)
}
// Sync with empty pods so that the entry in status map will be removed.
kl.SyncPods([]api.Pod{}, emptyPodUIDs, map[string]api.Pod{}, time.Now())
if _, err := kl.GetPodStatus(kubecontainer.BuildPodFullName("pod2", "")); err == nil {
t.Fatalf("expected to not have status cached for %q: %v", "pod2", err)
}
}
func TestValidatePodStatus(t *testing.T) {
testKubelet := newTestKubelet(t)
kubelet := testKubelet.kubelet
testCases := []struct {
podPhase api.PodPhase
success bool
}{
{api.PodRunning, true},
{api.PodSucceeded, true},
{api.PodFailed, true},
{api.PodPending, false},
{api.PodUnknown, false},
}
for i, tc := range testCases {
err := kubelet.validatePodPhase(&api.PodStatus{Phase: tc.podPhase})
if tc.success {
if err != nil {
t.Errorf("[case %d]: unexpected failure - %v", i, err)
}
} else if err == nil {
t.Errorf("[case %d]: unexpected success", i)
}
}
}
func TestValidateContainerStatus(t *testing.T) {
testKubelet := newTestKubelet(t)
kubelet := testKubelet.kubelet
containerName := "x"
testCases := []struct {
statuses []api.ContainerStatus
success bool
}{
{
statuses: []api.ContainerStatus{
{
Name: containerName,
State: api.ContainerState{
Running: &api.ContainerStateRunning{},
},
},
},
success: true,
},
{
statuses: []api.ContainerStatus{
{
Name: containerName,
State: api.ContainerState{
Termination: &api.ContainerStateTerminated{},
},
},
},
success: true,
},
{
statuses: []api.ContainerStatus{
{
Name: containerName,
State: api.ContainerState{
Waiting: &api.ContainerStateWaiting{},
},
},
},
success: false,
},
}
for i, tc := range testCases {
_, err := kubelet.validateContainerStatus(&api.PodStatus{
ContainerStatuses: tc.statuses,
}, containerName)
if tc.success {
if err != nil {
t.Errorf("[case %d]: unexpected failure - %v", i, err)
}
} else if err == nil {
t.Errorf("[case %d]: unexpected success", i)
}
}
if _, err := kubelet.validateContainerStatus(&api.PodStatus{
ContainerStatuses: testCases[0].statuses,
}, "blah"); err == nil {
t.Errorf("expected error with invalid container name")
}
}
func TestUpdateNewNodeStatus(t *testing.T) {
testKubelet := newTestKubelet(t)
kubelet := testKubelet.kubelet
kubeClient := testKubelet.fakeKubeClient
kubeClient.ReactFn = testclient.NewSimpleFake(&api.NodeList{Items: []api.Node{
{ObjectMeta: api.ObjectMeta{Name: "testnode"}},
}}).ReactFn
machineInfo := &cadvisorApi.MachineInfo{
MachineID: "123",
SystemUUID: "abc",
BootID: "1b3",
NumCores: 2,
MemoryCapacity: 1024,
}
mockCadvisor := testKubelet.fakeCadvisor
mockCadvisor.On("MachineInfo").Return(machineInfo, nil)
versionInfo := &cadvisorApi.VersionInfo{
KernelVersion: "3.16.0-0.bpo.4-amd64",
ContainerOsVersion: "Debian GNU/Linux 7 (wheezy)",
DockerVersion: "1.5.0",
}
mockCadvisor.On("VersionInfo").Return(versionInfo, nil)
expectedNode := &api.Node{
ObjectMeta: api.ObjectMeta{Name: "testnode"},
Spec: api.NodeSpec{},
Status: api.NodeStatus{
Conditions: []api.NodeCondition{
{
Type: api.NodeReady,
Status: api.ConditionTrue,
Reason: fmt.Sprintf("kubelet is posting ready status"),
LastHeartbeatTime: util.Time{},
LastTransitionTime: util.Time{},
},
},
NodeInfo: api.NodeSystemInfo{
MachineID: "123",
SystemUUID: "abc",
BootID: "1b3",
KernelVersion: "3.16.0-0.bpo.4-amd64",
OsImage: "Debian GNU/Linux 7 (wheezy)",
ContainerRuntimeVersion: "docker://1.5.0",
KubeletVersion: version.Get().String(),
KubeProxyVersion: version.Get().String(),
},
Capacity: api.ResourceList{
api.ResourceCPU: *resource.NewMilliQuantity(2000, resource.DecimalSI),
api.ResourceMemory: *resource.NewQuantity(1024, resource.BinarySI),
},
},
}
if err := kubelet.updateNodeStatus(); err != nil {
t.Errorf("unexpected error: %v", err)
}
if len(kubeClient.Actions) != 2 || kubeClient.Actions[1].Action != "update-status-node" {
t.Fatalf("unexpected actions: %v", kubeClient.Actions)
}
updatedNode, ok := kubeClient.Actions[1].Value.(*api.Node)
if !ok {
t.Errorf("unexpected object type")
}
if updatedNode.Status.Conditions[0].LastHeartbeatTime.IsZero() {
t.Errorf("unexpected zero last probe timestamp")
}
if updatedNode.Status.Conditions[0].LastTransitionTime.IsZero() {
t.Errorf("unexpected zero last transition timestamp")
}
updatedNode.Status.Conditions[0].LastHeartbeatTime = util.Time{}
updatedNode.Status.Conditions[0].LastTransitionTime = util.Time{}
if !reflect.DeepEqual(expectedNode, updatedNode) {
t.Errorf("unexpected objects: %s", util.ObjectDiff(expectedNode, updatedNode))
}
}
func TestUpdateExistingNodeStatus(t *testing.T) {
testKubelet := newTestKubelet(t)
kubelet := testKubelet.kubelet
kubeClient := testKubelet.fakeKubeClient
kubeClient.ReactFn = testclient.NewSimpleFake(&api.NodeList{Items: []api.Node{
{
ObjectMeta: api.ObjectMeta{Name: "testnode"},
Spec: api.NodeSpec{},
Status: api.NodeStatus{
Conditions: []api.NodeCondition{
{
Type: api.NodeReady,
Status: api.ConditionTrue,
Reason: fmt.Sprintf("kubelet is posting ready status"),
LastHeartbeatTime: util.Date(2012, 1, 1, 0, 0, 0, 0, time.UTC),
LastTransitionTime: util.Date(2012, 1, 1, 0, 0, 0, 0, time.UTC),
},
},
Capacity: api.ResourceList{
api.ResourceCPU: *resource.NewMilliQuantity(3000, resource.DecimalSI),
api.ResourceMemory: *resource.NewQuantity(2048, resource.BinarySI),
},
},
},
}}).ReactFn
mockCadvisor := testKubelet.fakeCadvisor
machineInfo := &cadvisorApi.MachineInfo{
MachineID: "123",
SystemUUID: "abc",
BootID: "1b3",
NumCores: 2,
MemoryCapacity: 1024,
}
mockCadvisor.On("MachineInfo").Return(machineInfo, nil)
versionInfo := &cadvisorApi.VersionInfo{
KernelVersion: "3.16.0-0.bpo.4-amd64",
ContainerOsVersion: "Debian GNU/Linux 7 (wheezy)",
DockerVersion: "1.5.0",
}
mockCadvisor.On("VersionInfo").Return(versionInfo, nil)
expectedNode := &api.Node{
ObjectMeta: api.ObjectMeta{Name: "testnode"},
Spec: api.NodeSpec{},
Status: api.NodeStatus{
Conditions: []api.NodeCondition{
{
Type: api.NodeReady,
Status: api.ConditionTrue,
Reason: fmt.Sprintf("kubelet is posting ready status"),
LastHeartbeatTime: util.Time{}, // placeholder
LastTransitionTime: util.Time{}, // placeholder
},
},
NodeInfo: api.NodeSystemInfo{
MachineID: "123",
SystemUUID: "abc",
BootID: "1b3",
KernelVersion: "3.16.0-0.bpo.4-amd64",
OsImage: "Debian GNU/Linux 7 (wheezy)",
ContainerRuntimeVersion: "docker://1.5.0",
KubeletVersion: version.Get().String(),
KubeProxyVersion: version.Get().String(),
},
Capacity: api.ResourceList{
api.ResourceCPU: *resource.NewMilliQuantity(2000, resource.DecimalSI),
api.ResourceMemory: *resource.NewQuantity(1024, resource.BinarySI),
},
},
}
if err := kubelet.updateNodeStatus(); err != nil {
t.Errorf("unexpected error: %v", err)
}
if len(kubeClient.Actions) != 2 {
t.Errorf("unexpected actions: %v", kubeClient.Actions)
}
updatedNode, ok := kubeClient.Actions[1].Value.(*api.Node)
if !ok {
t.Errorf("unexpected object type")
}
// Expect LastProbeTime to be updated to Now, while LastTransitionTime to be the same.
if reflect.DeepEqual(updatedNode.Status.Conditions[0].LastHeartbeatTime.Rfc3339Copy().UTC(), util.Date(2012, 1, 1, 0, 0, 0, 0, time.UTC).Time) {
t.Errorf("expected \n%v\n, got \n%v", util.Now(), util.Date(2012, 1, 1, 0, 0, 0, 0, time.UTC))
}
if !reflect.DeepEqual(updatedNode.Status.Conditions[0].LastTransitionTime.Rfc3339Copy().UTC(), util.Date(2012, 1, 1, 0, 0, 0, 0, time.UTC).Time) {
t.Errorf("expected \n%#v\n, got \n%#v", updatedNode.Status.Conditions[0].LastTransitionTime.Rfc3339Copy(),
util.Date(2012, 1, 1, 0, 0, 0, 0, time.UTC))
}
updatedNode.Status.Conditions[0].LastHeartbeatTime = util.Time{}
updatedNode.Status.Conditions[0].LastTransitionTime = util.Time{}
if !reflect.DeepEqual(expectedNode, updatedNode) {
t.Errorf("expected \n%v\n, got \n%v", expectedNode, updatedNode)
}
}
func TestUpdateNodeStatusError(t *testing.T) {
testKubelet := newTestKubelet(t)
kubelet := testKubelet.kubelet
// No matching node for the kubelet
testKubelet.fakeKubeClient.ReactFn = testclient.NewSimpleFake(&api.NodeList{Items: []api.Node{}}).ReactFn
if err := kubelet.updateNodeStatus(); err == nil {
t.Errorf("unexpected non error: %v", err)
}
if len(testKubelet.fakeKubeClient.Actions) != nodeStatusUpdateRetry {
t.Errorf("unexpected actions: %v", testKubelet.fakeKubeClient.Actions)
}
}
func TestCreateMirrorPod(t *testing.T) {
testKubelet := newTestKubelet(t)
kl := testKubelet.kubelet
manager := testKubelet.fakeMirrorClient
pod := api.Pod{
ObjectMeta: api.ObjectMeta{
UID: "12345678",
Name: "bar",
Namespace: "foo",
Annotations: map[string]string{
ConfigSourceAnnotationKey: "file",
},
},
}
pods := []api.Pod{pod}
kl.podManager.SetPods(pods)
err := kl.syncPod(&pod, nil, container.Pod{})
if err != nil {
t.Errorf("unexpected error: %v", err)
}
podFullName := kubecontainer.GetPodFullName(&pod)
if !manager.HasPod(podFullName) {
t.Errorf("expected mirror pod %q to be created", podFullName)
}
if manager.NumOfPods() != 1 || !manager.HasPod(podFullName) {
t.Errorf("expected one mirror pod %q, got %v", podFullName, manager.GetPods())
}
}
func TestDeleteOutdatedMirrorPod(t *testing.T) {
testKubelet := newTestKubelet(t)
testKubelet.fakeCadvisor.On("MachineInfo").Return(&cadvisorApi.MachineInfo{}, nil)
kl := testKubelet.kubelet
manager := testKubelet.fakeMirrorClient
pod := api.Pod{
ObjectMeta: api.ObjectMeta{
UID: "12345678",
Name: "foo",
Namespace: "ns",
Annotations: map[string]string{
ConfigSourceAnnotationKey: "file",
},
},
Spec: api.PodSpec{
Containers: []api.Container{
{Name: "1234", Image: "foo"},
},
},
}
// Mirror pod has an outdated spec.
mirrorPod := api.Pod{
ObjectMeta: api.ObjectMeta{
UID: "11111111",
Name: "foo",
Namespace: "ns",
Annotations: map[string]string{
ConfigSourceAnnotationKey: "api",
ConfigMirrorAnnotationKey: "mirror",
},
},
Spec: api.PodSpec{
Containers: []api.Container{
{Name: "1234", Image: "bar"},
},
},
}
pods := []api.Pod{pod, mirrorPod}
kl.podManager.SetPods(pods)
err := kl.syncPod(&pod, &mirrorPod, container.Pod{})
if err != nil {
t.Errorf("unexpected error: %v", err)
}
name := kubecontainer.GetPodFullName(&pod)
creates, deletes := manager.GetCounts(name)
if creates != 0 || deletes != 1 {
t.Errorf("expected 0 creation and 1 deletion of %q, got %d, %d", name, creates, deletes)
}
}
func TestDeleteOrphanedMirrorPods(t *testing.T) {
testKubelet := newTestKubelet(t)
testKubelet.fakeCadvisor.On("MachineInfo").Return(&cadvisorApi.MachineInfo{}, nil)
kl := testKubelet.kubelet
manager := testKubelet.fakeMirrorClient
orphanPods := []api.Pod{
{
ObjectMeta: api.ObjectMeta{
UID: "12345678",
Name: "pod1",
Namespace: "ns",
Annotations: map[string]string{
ConfigSourceAnnotationKey: "api",
ConfigMirrorAnnotationKey: "mirror",
},
},
},
{
ObjectMeta: api.ObjectMeta{
UID: "12345679",
Name: "pod2",
Namespace: "ns",
Annotations: map[string]string{
ConfigSourceAnnotationKey: "api",
ConfigMirrorAnnotationKey: "mirror",
},
},
},
}
kl.podManager.SetPods(orphanPods)
pods, mirrorMap := kl.podManager.GetPodsAndMirrorMap()
// Sync with an empty pod list to delete all mirror pods.
err := kl.SyncPods(pods, emptyPodUIDs, mirrorMap, time.Now())
if err != nil {
t.Errorf("unexpected error: %v", err)
}
if manager.NumOfPods() != 0 {
t.Errorf("expected zero mirror pods, got %v", manager.GetPods())
}
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 := []api.Pod{
{
ObjectMeta: api.ObjectMeta{
UID: "1234",
Name: "qux",
Namespace: "ns",
Annotations: map[string]string{
ConfigSourceAnnotationKey: "file",
},
},
Spec: api.PodSpec{
Containers: []api.Container{
{Name: "foo"},
},
},
},
{
ObjectMeta: api.ObjectMeta{
UID: "5678",
Name: "qux",
Namespace: "ns",
Annotations: map[string]string{
ConfigSourceAnnotationKey: "api",
ConfigMirrorAnnotationKey: "mirror",
},
},
Spec: api.PodSpec{
Containers: []api.Container{
{Name: "foo"},
},
},
},
}
containerID := "ab2cdf"
containerPath := fmt.Sprintf("/docker/%v", containerID)
containerInfo := cadvisorApi.ContainerInfo{
ContainerReference: cadvisorApi.ContainerReference{
Name: containerPath,
},
}
testKubelet := newTestKubelet(t)
kubelet := testKubelet.kubelet
fakeDocker := testKubelet.fakeDocker
mockCadvisor := testKubelet.fakeCadvisor
cadvisorReq := &cadvisorApi.ContainerInfoRequest{}
mockCadvisor.On("DockerContainer", containerID, cadvisorReq).Return(containerInfo, nil)
fakeDocker.ContainerList = []docker.APIContainers{
{
ID: containerID,
Names: []string{"/k8s_foo_qux_ns_1234_42"},
},
}
kubelet.podManager.SetPods(pods)
// Use the mirror pod UID to retrieve the stats.
stats, err := kubelet.GetContainerInfo("qux_ns", "5678", "foo", cadvisorReq)
if err != nil {
t.Errorf("unexpected error: %v", err)
}
if stats == nil {
t.Fatalf("stats should not be nil")
}
mockCadvisor.AssertExpectations(t)
}
func TestDoNotCacheStatusForStaticPods(t *testing.T) {
testKubelet := newTestKubelet(t)
testKubelet.fakeCadvisor.On("MachineInfo").Return(&cadvisorApi.MachineInfo{}, nil)
kubelet := testKubelet.kubelet
waitGroup := testKubelet.waitGroup
pods := []api.Pod{
{
ObjectMeta: api.ObjectMeta{
UID: "12345678",
Name: "foo",
Namespace: "new",
Annotations: map[string]string{
ConfigSourceAnnotationKey: "file",
},
},
Spec: api.PodSpec{
Containers: []api.Container{
{Name: "bar"},
},
},
},
}
kubelet.podManager.SetPods(pods)
waitGroup.Add(1)
err := kubelet.SyncPods(pods, emptyPodUIDs, map[string]api.Pod{}, time.Now())
if err != nil {
t.Errorf("unexpected error: %v", err)
}
waitGroup.Wait()
podFullName := kubecontainer.GetPodFullName(&pods[0])
status, ok := kubelet.statusManager.GetPodStatus(podFullName)
if ok {
t.Errorf("unexpected status %#v found for static pod %q", status, podFullName)
}
}
func TestHostNetworkAllowed(t *testing.T) {
testKubelet := newTestKubelet(t)
kubelet := testKubelet.kubelet
capabilities.SetForTests(capabilities.Capabilities{
HostNetworkSources: []string{ApiserverSource, FileSource},
})
pod := &api.Pod{
ObjectMeta: api.ObjectMeta{
UID: "12345678",
Name: "foo",
Namespace: "new",
Annotations: map[string]string{
ConfigSourceAnnotationKey: FileSource,
},
},
Spec: api.PodSpec{
Containers: []api.Container{
{Name: "foo"},
},
HostNetwork: true,
},
}
kubelet.podManager.SetPods([]api.Pod{*pod})
err := kubelet.syncPod(pod, nil, container.Pod{})
if err != nil {
t.Errorf("expected pod infra creation to succeed: %v", err)
}
}
func TestHostNetworkDisallowed(t *testing.T) {
testKubelet := newTestKubelet(t)
kubelet := testKubelet.kubelet
capabilities.SetForTests(capabilities.Capabilities{
HostNetworkSources: []string{},
})
pod := &api.Pod{
ObjectMeta: api.ObjectMeta{
UID: "12345678",
Name: "foo",
Namespace: "new",
Annotations: map[string]string{
ConfigSourceAnnotationKey: FileSource,
},
},
Spec: api.PodSpec{
Containers: []api.Container{
{Name: "foo"},
},
HostNetwork: true,
},
}
err := kubelet.syncPod(pod, nil, container.Pod{})
if err == nil {
t.Errorf("expected pod infra creation to fail")
}
}
func TestSyncPodsWithRestartPolicy(t *testing.T) {
testKubelet := newTestKubelet(t)
testKubelet.fakeCadvisor.On("MachineInfo").Return(&cadvisorApi.MachineInfo{}, nil)
kubelet := testKubelet.kubelet
fakeDocker := testKubelet.fakeDocker
waitGroup := testKubelet.waitGroup
containers := []api.Container{
{Name: "succeeded"},
{Name: "failed"},
}
runningAPIContainers := []docker.APIContainers{
{
// pod infra container
Names: []string{"/k8s_POD_foo_new_12345678_0"},
ID: "9876",
},
}
exitedAPIContainers := []docker.APIContainers{
{
// format is // k8s_<container-id>_<pod-fullname>_<pod-uid>
Names: []string{"/k8s_succeeded." + strconv.FormatUint(dockertools.HashContainer(&containers[0]), 16) + "_foo_new_12345678_0"},
ID: "1234",
},
{
// format is // k8s_<container-id>_<pod-fullname>_<pod-uid>
Names: []string{"/k8s_failed." + strconv.FormatUint(dockertools.HashContainer(&containers[1]), 16) + "_foo_new_12345678_0"},
ID: "5678",
},
}
containerMap := map[string]*docker.Container{
"1234": {
ID: "1234",
Name: "succeeded",
Config: &docker.Config{},
State: docker.State{
ExitCode: 0,
StartedAt: time.Now(),
FinishedAt: time.Now(),
},
},
"5678": {
ID: "5678",
Name: "failed",
Config: &docker.Config{},
State: docker.State{
ExitCode: 42,
StartedAt: time.Now(),
FinishedAt: time.Now(),
},
},
}
tests := []struct {
policy api.RestartPolicy
calls []string
created []string
stopped []string
}{
{
api.RestartPolicyAlways,
[]string{"list", "list", "list", "inspect_container", "inspect_container", "inspect_container", "create", "start", "create", "start", "list", "inspect_container", "inspect_container", "inspect_container", "inspect_container", "inspect_container"},
[]string{"succeeded", "failed"},
[]string{},
},
{
api.RestartPolicyOnFailure,
[]string{"list", "list", "list", "inspect_container", "inspect_container", "inspect_container", "create", "start", "list", "inspect_container", "inspect_container", "inspect_container", "inspect_container"},
[]string{"failed"},
[]string{},
},
{
api.RestartPolicyNever,
[]string{"list", "list", "list", "inspect_container", "inspect_container", "inspect_container", "stop", "list", "inspect_container", "inspect_container"},
[]string{},
[]string{"9876"},
},
}
for i, tt := range tests {
fakeDocker.ContainerList = runningAPIContainers
fakeDocker.ExitedContainerList = exitedAPIContainers
fakeDocker.ContainerMap = containerMap
fakeDocker.ClearCalls()
pods := []api.Pod{
{
ObjectMeta: api.ObjectMeta{
UID: "12345678",
Name: "foo",
Namespace: "new",
},
Spec: api.PodSpec{
Containers: containers,
RestartPolicy: tt.policy,
},
},
}
kubelet.podManager.SetPods(pods)
waitGroup.Add(1)
err := kubelet.SyncPods(pods, emptyPodUIDs, map[string]api.Pod{}, time.Now())
if err != nil {
t.Errorf("%d: unexpected error: %v", i, err)
}
waitGroup.Wait()
// 'stop' is because the pod infra container is killed when no container is running.
verifyCalls(t, fakeDocker, tt.calls)
if err := fakeDocker.AssertCreated(tt.created); err != nil {
t.Errorf("%d: %v", i, err)
}
if err := fakeDocker.AssertStopped(tt.stopped); err != nil {
t.Errorf("%d: %v", i, err)
}
}
}
func TestGetPodStatusWithLastTermination(t *testing.T) {
testKubelet := newTestKubelet(t)
testKubelet.fakeCadvisor.On("MachineInfo").Return(&cadvisorApi.MachineInfo{}, nil)
kubelet := testKubelet.kubelet
fakeDocker := testKubelet.fakeDocker
waitGroup := testKubelet.waitGroup
containers := []api.Container{
{Name: "succeeded"},
{Name: "failed"},
}
runningAPIContainers := []docker.APIContainers{
{
// pod infra container
Names: []string{"/k8s_POD_foo_new_12345678_0"},
ID: "9876",
},
}
exitedAPIContainers := []docker.APIContainers{
{
// format is // k8s_<container-id>_<pod-fullname>_<pod-uid>
Names: []string{"/k8s_succeeded." + strconv.FormatUint(dockertools.HashContainer(&containers[0]), 16) + "_foo_new_12345678_0"},
ID: "1234",
},
{
// format is // k8s_<container-id>_<pod-fullname>_<pod-uid>
Names: []string{"/k8s_failed." + strconv.FormatUint(dockertools.HashContainer(&containers[1]), 16) + "_foo_new_12345678_0"},
ID: "5678",
},
}
containerMap := map[string]*docker.Container{
"1234": {
ID: "1234",
Name: "succeeded",
Config: &docker.Config{},
State: docker.State{
ExitCode: 0,
StartedAt: time.Now(),
FinishedAt: time.Now(),
},
},
"5678": {
ID: "5678",
Name: "failed",
Config: &docker.Config{},
State: docker.State{
ExitCode: 42,
StartedAt: time.Now(),
FinishedAt: time.Now(),
},
},
}
tests := []struct {
policy api.RestartPolicy
created []string
stopped []string
lastTerminations []string
}{
{
api.RestartPolicyAlways,
[]string{"succeeded", "failed"},
[]string{},
[]string{"docker://1234", "docker://5678"},
},
{
api.RestartPolicyOnFailure,
[]string{"failed"},
[]string{},
[]string{"docker://5678"},
},
{
api.RestartPolicyNever,
[]string{},
[]string{"9876"},
[]string{},
},
}
for i, tt := range tests {
fakeDocker.ContainerList = runningAPIContainers
fakeDocker.ExitedContainerList = exitedAPIContainers
fakeDocker.ContainerMap = containerMap
fakeDocker.ClearCalls()
pods := []api.Pod{
{
ObjectMeta: api.ObjectMeta{
UID: "12345678",
Name: "foo",
Namespace: "new",
},
Spec: api.PodSpec{
Containers: containers,
RestartPolicy: tt.policy,
},
},
}
kubelet.podManager.SetPods(pods)
waitGroup.Add(1)
err := kubelet.SyncPods(pods, emptyPodUIDs, map[string]api.Pod{}, time.Now())
if err != nil {
t.Errorf("%d: unexpected error: %v", i, err)
}
waitGroup.Wait()
// Check if we can retrieve the pod status from GetPodStatus().
podName := kubecontainer.GetPodFullName(&pods[0])
status, err := kubelet.GetPodStatus(podName)
if err != nil {
t.Fatalf("unable to retrieve pod status for pod %q: %#v.", podName, err)
} else {
terminatedContainers := []string{}
for _, cs := range status.ContainerStatuses {
if cs.LastTerminationState.Termination != nil {
terminatedContainers = append(terminatedContainers, cs.LastTerminationState.Termination.ContainerID)
}
}
sort.StringSlice(terminatedContainers).Sort()
sort.StringSlice(tt.lastTerminations).Sort()
if !reflect.DeepEqual(terminatedContainers, tt.lastTerminations) {
t.Errorf("Expected(sorted): %#v, Actual(sorted): %#v", tt.lastTerminations, terminatedContainers)
}
}
if err := fakeDocker.AssertCreated(tt.created); err != nil {
t.Errorf("%d: %v", i, err)
}
if err := fakeDocker.AssertStopped(tt.stopped); err != nil {
t.Errorf("%d: %v", i, err)
}
}
}
func TestGetPodCreationFailureReason(t *testing.T) {
testKubelet := newTestKubelet(t)
kubelet := testKubelet.kubelet
fakeDocker := testKubelet.fakeDocker
failureReason := "creation failure"
fakeDocker.Errors["create"] = fmt.Errorf("%s", failureReason)
fakeDocker.ContainerList = []docker.APIContainers{}
pod := api.Pod{
ObjectMeta: api.ObjectMeta{
UID: "12345678",
Name: "bar",
Namespace: "new",
},
Spec: api.PodSpec{
Containers: []api.Container{
{Name: "foo"},
},
},
}
pods := []api.Pod{pod}
kubelet.podManager.SetPods(pods)
_, err := kubelet.runContainer(&pod, &pod.Spec.Containers[0], make(map[string]volume.Volume), "", "")
if err == nil {
t.Errorf("expected error, found nil")
}
status, err := kubelet.GetPodStatus(kubecontainer.GetPodFullName(&pod))
if err != nil {
t.Errorf("unexpected error %v", err)
}
if len(status.ContainerStatuses) < 1 {
t.Errorf("expected 1 container status, got %d", len(status.ContainerStatuses))
} else {
state := status.ContainerStatuses[0].State
if state.Waiting == nil {
t.Errorf("expected waiting state, got %#v", state)
} else if state.Waiting.Reason != failureReason {
t.Errorf("expected reason %q, got %q", state.Waiting.Reason)
}
}
}
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