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ab3c9de34bee012a569e2b803a853b6943948647
kubernetes/pkg/kubelet/kubelet_test.go
Victor Marmol ab3c9de34b Refactoring cAdvisor interface into a package. 
This will make it easier to start running the real cAdvisor alongside
Kubelet. This change is primarily no-op refactoring. The main behavioral
change is that we always create a cAdvisor interface and expect it to
always be available. When we make a request, if cAdvisor is not
connected the request fails with a connection error. This failure is
handled today as well.
2015-03-09 11:19:05 -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"
"fmt"
"io"
"io/ioutil"
"net/http"
"os"
"path"
"reflect"
"regexp"
"strconv"
"strings"
"sync"
"testing"
"time"
"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
"github.com/GoogleCloudPlatform/kubernetes/pkg/client/record"
"github.com/GoogleCloudPlatform/kubernetes/pkg/kubelet/cadvisor"
"github.com/GoogleCloudPlatform/kubernetes/pkg/kubelet/dockertools"
"github.com/GoogleCloudPlatform/kubernetes/pkg/kubelet/metrics"
"github.com/GoogleCloudPlatform/kubernetes/pkg/kubelet/volume"
_ "github.com/GoogleCloudPlatform/kubernetes/pkg/kubelet/volume/host_path"
"github.com/GoogleCloudPlatform/kubernetes/pkg/types"
"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
"github.com/fsouza/go-dockerclient"
cadvisorApi "github.com/google/cadvisor/info/v1"
)
func init() {
api.ForTesting_ReferencesAllowBlankSelfLinks = true
util.ReallyCrash = true
}
// TODO(vmarmol): Consider compacting these return types of handling this better.
func newTestKubelet(t *testing.T) (*Kubelet, *dockertools.FakeDockerClient, *sync.WaitGroup, *cadvisor.Mock) {
fakeDocker := &dockertools.FakeDockerClient{
RemovedImages: util.StringSet{},
}
fakeDockerCache := dockertools.NewFakeDockerCache(fakeDocker)
recorder := &record.FakeRecorder{}
kubelet := &Kubelet{}
kubelet.dockerClient = fakeDocker
kubelet.dockerCache = fakeDockerCache
kubelet.dockerPuller = &dockertools.FakeDockerPuller{}
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.BoundPod, containers dockertools.DockerContainers) error {
err := kubelet.syncPod(pod, containers)
waitGroup.Done()
return err
},
recorder)
kubelet.sourcesReady = func() bool { return true }
kubelet.masterServiceNamespace = api.NamespaceDefault
kubelet.serviceLister = testServiceLister{}
kubelet.readiness = newReadinessStates()
kubelet.recorder = recorder
kubelet.podStatuses = map[string]api.PodStatus{}
if err := kubelet.setupDataDirs(); err != nil {
t.Fatalf("can't initialize kubelet data dirs: %v", err)
}
mockCadvisor := &cadvisor.Mock{}
kubelet.cadvisor = mockCadvisor
return kubelet, fakeDocker, waitGroup, mockCadvisor
}
func verifyCalls(t *testing.T, fakeDocker *dockertools.FakeDockerClient, calls []string) {
err := fakeDocker.AssertCalls(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) {
invalid := len(actual) != len(expected)
if !invalid {
for _, exp := range expected {
found := false
for _, act := range actual {
if exp == act {
found = true
break
}
}
if !found {
t.Errorf("Expected element %s not found in %#v", exp, actual)
}
}
}
if invalid {
t.Errorf("Expected: %#v, Actual: %#v", expected, actual)
}
}
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) {
kubelet, _, _, _ := newTestKubelet(t)
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) {
kubelet, _, _, _ := newTestKubelet(t)
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 TestKillContainerWithError(t *testing.T) {
containers := []docker.APIContainers{
{
ID: "1234",
Names: []string{"/k8s_foo_qux_1234_42"},
},
{
ID: "5678",
Names: []string{"/k8s_bar_qux_5678_42"},
},
}
fakeDocker := &dockertools.FakeDockerClient{
Err: fmt.Errorf("sample error"),
ContainerList: append([]docker.APIContainers{}, containers...),
}
kubelet, _, _, _ := newTestKubelet(t)
for _, c := range fakeDocker.ContainerList {
kubelet.readiness.set(c.ID, true)
}
kubelet.dockerClient = fakeDocker
err := kubelet.killContainer(&fakeDocker.ContainerList[0])
if err == nil {
t.Errorf("expected error, found nil")
}
verifyCalls(t, fakeDocker, []string{"stop"})
killedContainer := containers[0]
liveContainer := containers[1]
if _, found := kubelet.readiness.states[killedContainer.ID]; found {
t.Errorf("exepcted container entry ID '%v' to not be found. states: %+v", killedContainer.ID, kubelet.readiness.states)
}
if _, found := kubelet.readiness.states[liveContainer.ID]; !found {
t.Errorf("exepcted container entry ID '%v' to be found. states: %+v", liveContainer.ID, kubelet.readiness.states)
}
}
func TestKillContainer(t *testing.T) {
containers := []docker.APIContainers{
{
ID: "1234",
Names: []string{"/k8s_foo_qux_1234_42"},
},
{
ID: "5678",
Names: []string{"/k8s_bar_qux_5678_42"},
},
}
kubelet, fakeDocker, _, _ := newTestKubelet(t)
fakeDocker.ContainerList = append([]docker.APIContainers{}, containers...)
fakeDocker.Container = &docker.Container{
Name: "foobar",
}
for _, c := range fakeDocker.ContainerList {
kubelet.readiness.set(c.ID, true)
}
err := kubelet.killContainer(&fakeDocker.ContainerList[0])
if err != nil {
t.Errorf("unexpected error: %v", err)
}
verifyCalls(t, fakeDocker, []string{"stop"})
killedContainer := containers[0]
liveContainer := containers[1]
if _, found := kubelet.readiness.states[killedContainer.ID]; found {
t.Errorf("exepcted container entry ID '%v' to not be found. states: %+v", killedContainer.ID, kubelet.readiness.states)
}
if _, found := kubelet.readiness.states[liveContainer.ID]; !found {
t.Errorf("exepcted container entry ID '%v' to be found. states: %+v", liveContainer.ID, kubelet.readiness.states)
}
}
type channelReader struct {
list [][]api.BoundPod
wg sync.WaitGroup
}
func startReading(channel <-chan interface{}) *channelReader {
cr := &channelReader{}
cr.wg.Add(1)
go func() {
for {
update, ok := <-channel
if !ok {
break
}
cr.list = append(cr.list, update.(PodUpdate).Pods)
}
cr.wg.Done()
}()
return cr
}
func (cr *channelReader) GetList() [][]api.BoundPod {
cr.wg.Wait()
return cr.list
}
var emptyPodUIDs map[types.UID]metrics.SyncPodType
func TestSyncPodsDoesNothing(t *testing.T) {
kubelet, fakeDocker, waitGroup, _ := newTestKubelet(t)
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",
},
}
kubelet.pods = []api.BoundPod{
{
ObjectMeta: api.ObjectMeta{
UID: "12345678",
Name: "foo",
Namespace: "new",
},
Spec: api.PodSpec{
Containers: []api.Container{
container,
},
},
},
}
waitGroup.Add(1)
err := kubelet.SyncPods(kubelet.pods, emptyPodUIDs, time.Now())
if err != nil {
t.Errorf("unexpected error: %v", err)
}
waitGroup.Wait()
verifyCalls(t, fakeDocker, []string{"list", "list", "list", "inspect_container", "inspect_container"})
}
func TestSyncPodsWithTerminationLog(t *testing.T) {
kubelet, fakeDocker, waitGroup, _ := newTestKubelet(t)
container := api.Container{
Name: "bar",
TerminationMessagePath: "/dev/somepath",
}
fakeDocker.ContainerList = []docker.APIContainers{}
kubelet.pods = []api.BoundPod{
{
ObjectMeta: api.ObjectMeta{
UID: "12345678",
Name: "foo",
Namespace: "new",
},
Spec: api.PodSpec{
Containers: []api.Container{
container,
},
},
},
}
waitGroup.Add(1)
err := kubelet.SyncPods(kubelet.pods, emptyPodUIDs, time.Now())
if err != nil {
t.Errorf("unexpected error: %v", err)
}
waitGroup.Wait()
verifyCalls(t, fakeDocker, []string{
"list", "list", "create", "start", "inspect_container", "list", "inspect_container", "inspect_image", "list", "create", "start"})
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) {
kubelet, fakeDocker, waitGroup, _ := newTestKubelet(t)
kubelet.podInfraContainerImage = "custom_image_name"
fakeDocker.ContainerList = []docker.APIContainers{}
kubelet.pods = []api.BoundPod{
{
ObjectMeta: api.ObjectMeta{
UID: "12345678",
Name: "foo",
Namespace: "new",
},
Spec: api.PodSpec{
Containers: []api.Container{
{Name: "bar"},
},
},
},
}
waitGroup.Add(1)
err := kubelet.SyncPods(kubelet.pods, emptyPodUIDs, time.Now())
if err != nil {
t.Errorf("unexpected error: %v", err)
}
waitGroup.Wait()
verifyCalls(t, fakeDocker, []string{
"list", "list", "create", "start", "inspect_container", "list", "inspect_container", "inspect_image", "list", "create", "start"})
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) {
kubelet, fakeDocker, waitGroup, _ := newTestKubelet(t)
puller := kubelet.dockerPuller.(*dockertools.FakeDockerPuller)
puller.HasImages = []string{}
kubelet.podInfraContainerImage = "custom_image_name"
fakeDocker.ContainerList = []docker.APIContainers{}
kubelet.pods = []api.BoundPod{
{
ObjectMeta: api.ObjectMeta{
UID: "12345678",
Name: "foo",
Namespace: "new",
},
Spec: api.PodSpec{
Containers: []api.Container{
{Name: "bar", Image: "something", ImagePullPolicy: "IfNotPresent"},
},
},
},
}
waitGroup.Add(1)
err := kubelet.SyncPods(kubelet.pods, emptyPodUIDs, time.Now())
if err != nil {
t.Errorf("unexpected error: %v", err)
}
waitGroup.Wait()
verifyCalls(t, fakeDocker, []string{
"list", "list", "create", "start", "inspect_container", "list", "inspect_container", "inspect_image", "list", "create", "start"})
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) {
kubelet, fakeDocker, waitGroup, _ := newTestKubelet(t)
fakeDocker.ContainerList = []docker.APIContainers{
{
// pod infra container
Names: []string{"/k8s_POD_foo_new_12345678_0"},
ID: "9876",
},
}
kubelet.pods = []api.BoundPod{
{
ObjectMeta: api.ObjectMeta{
UID: "12345678",
Name: "foo",
Namespace: "new",
},
Spec: api.PodSpec{
Containers: []api.Container{
{Name: "bar"},
},
},
},
}
waitGroup.Add(1)
err := kubelet.SyncPods(kubelet.pods, emptyPodUIDs, time.Now())
if err != nil {
t.Errorf("unexpected error: %v", err)
}
waitGroup.Wait()
verifyCalls(t, fakeDocker, []string{
"list", "list", "list", "inspect_container", "inspect_image", "list", "create", "start"})
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) {
kubelet, fakeDocker, waitGroup, _ := newTestKubelet(t)
fakeHttp := fakeHTTP{}
kubelet.httpClient = &fakeHttp
fakeDocker.ContainerList = []docker.APIContainers{
{
// pod infra container
Names: []string{"/k8s_POD_foo_new_12345678_0"},
ID: "9876",
},
}
kubelet.pods = []api.BoundPod{
{
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)
err := kubelet.SyncPods(kubelet.pods, emptyPodUIDs, time.Now())
if err != nil {
t.Errorf("unexpected error: %v", err)
}
waitGroup.Wait()
verifyCalls(t, fakeDocker, []string{
"list", "list", "list", "inspect_container", "inspect_image", "list", "create", "start"})
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) {
kubelet, fakeDocker, waitGroup, _ := newTestKubelet(t)
fakeDocker.ContainerList = []docker.APIContainers{
{
// format is // k8s_<container-id>_<pod-fullname>_<pod-uid>
Names: []string{"/k8s_bar_foo_new_12345678_0"},
ID: "1234",
},
}
kubelet.pods = []api.BoundPod{
{
ObjectMeta: api.ObjectMeta{
UID: "12345678",
Name: "foo",
Namespace: "new",
},
Spec: api.PodSpec{
Containers: []api.Container{
{Name: "bar"},
},
},
},
}
waitGroup.Add(1)
err := kubelet.SyncPods(kubelet.pods, emptyPodUIDs, time.Now())
if err != nil {
t.Errorf("unexpected error: %v", err)
}
waitGroup.Wait()
verifyCalls(t, fakeDocker, []string{
"list", "list", "stop", "create", "start", "inspect_container", "list", "list", "inspect_container", "inspect_image", "list", "create", "start"})
// 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
kubelet, fakeDocker, _, _ := newTestKubelet(t)
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.BoundPod{}, emptyPodUIDs, 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.BoundPod{}, emptyPodUIDs, 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) {
kubelet, fakeDocker, _, _ := newTestKubelet(t)
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.BoundPod{}, emptyPodUIDs, 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) {
kubelet, fakeDocker, _, _ := newTestKubelet(t)
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.BoundPod{
ObjectMeta: api.ObjectMeta{
UID: "12345678",
Name: "bar",
Namespace: "new",
},
Spec: api.PodSpec{
Containers: []api.Container{
{Name: "foo"},
},
},
}
kubelet.pods = append(kubelet.pods, bound)
err := kubelet.syncPod(&bound, dockerContainers)
if err != nil {
t.Errorf("unexpected error: %v", err)
}
verifyCalls(t, fakeDocker, []string{"list", "stop"})
// 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) {
kubelet, fakeDocker, _, _ := newTestKubelet(t)
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.BoundPod{
ObjectMeta: api.ObjectMeta{
UID: "12345678",
Name: "foo",
Namespace: "new",
},
Spec: api.PodSpec{
Containers: []api.Container{
{Name: "bar"},
},
},
}
kubelet.pods = append(kubelet.pods, bound)
err := kubelet.syncPod(&bound, dockerContainers)
if err != nil {
t.Errorf("unexpected error: %v", err)
}
//verifyCalls(t, fakeDocker, []string{"list", "stop", "list", "create", "start", "stop", "create", "start", "inspect_container"})
verifyCalls(t, fakeDocker, []string{"list", "stop", "stop", "list", "create", "start"})
// 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) {
kubelet, fakeDocker, _, _ := newTestKubelet(t)
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.BoundPod{
ObjectMeta: api.ObjectMeta{
UID: "12345678",
Name: "foo",
Namespace: "new",
},
Spec: api.PodSpec{
Containers: []api.Container{
{Name: "bar",
LivenessProbe: &api.Probe{
// Always returns healthy == false
},
},
},
},
}
kubelet.pods = append(kubelet.pods, bound)
err := kubelet.syncPod(&bound, dockerContainers)
if err != nil {
t.Errorf("unexpected error: %v", err)
}
verifyCalls(t, fakeDocker, []string{"list", "stop", "list", "create", "start"})
// 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) {
kubelet, _, _, _ := newTestKubelet(t)
kubelet.volumePluginMgr.InitPlugins([]volume.Plugin{&volume.FakePlugin{"fake", nil}}, &volumeHost{kubelet})
pod := api.BoundPod{
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.BoundPod volumes map is missing key: %s. %#v", name, podVolumes)
}
}
}
func TestGetPodVolumesFromDisk(t *testing.T) {
kubelet, _, _, _ := newTestKubelet(t)
plug := &volume.FakePlugin{"fake", nil}
kubelet.volumePluginMgr.InitPlugins([]volume.Plugin{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,
},
},
}
pod := api.BoundPod{
ObjectMeta: api.ObjectMeta{
UID: "12345678",
Name: "pod",
Namespace: "test",
},
}
podVolumes := volumeMap{
"disk": &stubVolume{"/mnt/disk"},
"disk4": &stubVolume{"/mnt/host"},
"disk5": &stubVolume{"/var/lib/kubelet/podID/volumes/empty/disk5"},
}
binds := makeBinds(&pod, &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)
}
func TestMakePortsAndBindings(t *testing.T) {
container := api.Container{
Ports: []api.ContainerPort{
{
ContainerPort: 80,
HostPort: 8080,
HostIP: "127.0.0.1",
},
{
ContainerPort: 443,
HostPort: 443,
Protocol: "tcp",
},
{
ContainerPort: 444,
HostPort: 444,
Protocol: "udp",
},
{
ContainerPort: 445,
HostPort: 445,
Protocol: "foobar",
},
},
}
exposedPorts, bindings := makePortsAndBindings(&container)
if len(container.Ports) != len(exposedPorts) ||
len(container.Ports) != len(bindings) {
t.Errorf("Unexpected ports and bindings, %#v %#v %#v", container, exposedPorts, bindings)
}
for key, value := range bindings {
switch value[0].HostPort {
case "8080":
if !reflect.DeepEqual(docker.Port("80/tcp"), key) {
t.Errorf("Unexpected docker port: %#v", key)
}
if value[0].HostIP != "127.0.0.1" {
t.Errorf("Unexpected host IP: %s", value[0].HostIP)
}
case "443":
if !reflect.DeepEqual(docker.Port("443/tcp"), key) {
t.Errorf("Unexpected docker port: %#v", key)
}
if value[0].HostIP != "" {
t.Errorf("Unexpected host IP: %s", value[0].HostIP)
}
case "444":
if !reflect.DeepEqual(docker.Port("444/udp"), key) {
t.Errorf("Unexpected docker port: %#v", key)
}
if value[0].HostIP != "" {
t.Errorf("Unexpected host IP: %s", value[0].HostIP)
}
case "445":
if !reflect.DeepEqual(docker.Port("445/tcp"), key) {
t.Errorf("Unexpected docker port: %#v", key)
}
if value[0].HostIP != "" {
t.Errorf("Unexpected host IP: %s", value[0].HostIP)
}
}
}
}
func TestFieldPath(t *testing.T) {
pod := &api.BoundPod{Spec: api.PodSpec{Containers: []api.Container{
{Name: "foo"},
{Name: "bar"},
{Name: ""},
{Name: "baz"},
}}}
table := map[string]struct {
pod *api.BoundPod
container *api.Container
path string
success bool
}{
"basic": {pod, &api.Container{Name: "foo"}, "spec.containers{foo}", true},
"basic2": {pod, &api.Container{Name: "baz"}, "spec.containers{baz}", true},
"emptyName": {pod, &api.Container{Name: ""}, "spec.containers[2]", true},
"basicSamePointer": {pod, &pod.Spec.Containers[0], "spec.containers{foo}", true},
"missing": {pod, &api.Container{Name: "qux"}, "", false},
}
for name, item := range table {
res, err := fieldPath(item.pod, item.container)
if item.success == false {
if err == nil {
t.Errorf("%v: unexpected non-error", name)
}
continue
}
if err != nil {
t.Errorf("%v: unexpected error: %v", name, err)
continue
}
if e, a := item.path, res; e != a {
t.Errorf("%v: wanted %v, got %v", name, e, a)
}
}
}
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,
},
}
kubelet, fakeDocker, _, mockCadvisor := newTestKubelet(t)
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"
kubelet, fakeDocker, _, mockCadvisor := newTestKubelet(t)
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) {
kubelet, fakeDocker, _, mockCadvisor := newTestKubelet(t)
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) {
kubelet, _, _, mockCadvisor := newTestKubelet(t)
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) {
kubelet, _, _, mockCadvisor := newTestKubelet(t)
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) {
kubelet, _, _, mockCadvisor := newTestKubelet(t)
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(podInfraContainerID string, port uint16, stream io.ReadWriteCloser) error {
f.ID = podInfraContainerID
f.Port = port
f.Stream = stream
return nil
}
func TestRunInContainerNoSuchPod(t *testing.T) {
fakeCommandRunner := fakeContainerCommandRunner{}
kubelet, fakeDocker, _, _ := newTestKubelet(t)
fakeDocker.ContainerList = []docker.APIContainers{}
kubelet.runner = &fakeCommandRunner
podName := "podFoo"
podNamespace := "etcd"
containerName := "containerFoo"
output, err := kubelet.RunInContainer(
GetPodFullName(&api.BoundPod{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{}
kubelet, fakeDocker, _, _ := newTestKubelet(t)
kubelet.runner = &fakeCommandRunner
containerID := "abc1234"
podName := "podFoo"
podNamespace := "etcd"
containerName := "containerFoo"
fakeDocker.ContainerList = []docker.APIContainers{
{
ID: containerID,
Names: []string{"/k8s_" + containerName + "_" + podName + "_" + podNamespace + "_12345678_42"},
},
}
cmd := []string{"ls"}
_, err := kubelet.RunInContainer(
GetPodFullName(&api.BoundPod{
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{}
kubelet, fakeDocker, _, _ := newTestKubelet(t)
kubelet.runner = &fakeCommandRunner
containerID := "abc1234"
podName := "podFoo"
podNamespace := "etcd"
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{}
kubelet, _, _, _ := newTestKubelet(t)
kubelet.httpClient = &fakeHttp
podName := "podFoo"
podNamespace := "etcd"
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) {
kubelet, _, _, _ := newTestKubelet(t)
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) {
kubelet, fakeDocker, _, _ := newTestKubelet(t)
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.BoundPod{
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",
},
},
},
},
},
},
}
kubelet.pods = append(kubelet.pods, bound)
err := kubelet.syncPod(&bound, dockerContainers)
if err != nil {
t.Errorf("unexpected error: %v", err)
}
verifyCalls(t, fakeDocker, []string{"list", "list", "create", "start", "stop"})
if len(fakeDocker.Stopped) != 1 {
t.Errorf("Wrong containers were stopped: %v", fakeDocker.Stopped)
}
}
func TestKubeletGarbageCollection(t *testing.T) {
tests := []struct {
containers []docker.APIContainers
containerDetails map[string]*docker.Container
expectedRemoved []string
}{
// Remove oldest containers.
{
containers: []docker.APIContainers{
{
// pod infra container
Names: []string{"/k8s_POD_foo_new_.deadbeef_42"},
ID: "1876",
},
{
// pod infra container
Names: []string{"/k8s_POD_foo_new_.deadbeef_42"},
ID: "2876",
},
{
// pod infra container
Names: []string{"/k8s_POD_foo_new_.deadbeef_42"},
ID: "3876",
},
},
containerDetails: map[string]*docker.Container{
"1876": {
State: docker.State{
Running: false,
},
ID: "1876",
Created: time.Now(),
},
},
expectedRemoved: []string{"1876"},
},
// Only remove non-running containers.
{
containers: []docker.APIContainers{
{
// pod infra container
Names: []string{"/k8s_POD_foo_new_.deadbeef_42"},
ID: "1876",
},
{
// pod infra container
Names: []string{"/k8s_POD_foo_new_.deadbeef_42"},
ID: "2876",
},
{
// pod infra container
Names: []string{"/k8s_POD_foo_new_.deadbeef_42"},
ID: "3876",
},
{
// pod infra container
Names: []string{"/k8s_POD_foo_new_.deadbeef_42"},
ID: "4876",
},
},
containerDetails: map[string]*docker.Container{
"1876": {
State: docker.State{
Running: true,
},
ID: "1876",
Created: time.Now(),
},
"2876": {
State: docker.State{
Running: false,
},
ID: "2876",
Created: time.Now(),
},
},
expectedRemoved: []string{"2876"},
},
// Less than maxContainerCount doesn't delete any.
{
containers: []docker.APIContainers{
{
// pod infra container
Names: []string{"/k8s_POD_foo_new_.deadbeef_42"},
ID: "1876",
},
},
},
// maxContainerCount applies per container..
{
containers: []docker.APIContainers{
{
// pod infra container
Names: []string{"/k8s_POD_foo2_new_.beefbeef_40"},
ID: "1706",
},
{
// pod infra container
Names: []string{"/k8s_POD_foo2_new_.beefbeef_40"},
ID: "2706",
},
{
// pod infra container
Names: []string{"/k8s_POD_foo2_new_.beefbeef_40"},
ID: "3706",
},
{
// pod infra container
Names: []string{"/k8s_POD_foo_new_.deadbeef_42"},
ID: "1876",
},
{
// pod infra container
Names: []string{"/k8s_POD_foo_new_.deadbeef_42"},
ID: "2876",
},
{
// pod infra container
Names: []string{"/k8s_POD_foo_new_.deadbeef_42"},
ID: "3876",
},
},
containerDetails: map[string]*docker.Container{
"1706": {
State: docker.State{
Running: false,
},
ID: "1706",
Created: time.Now(),
},
"1876": {
State: docker.State{
Running: false,
},
ID: "1876",
Created: time.Now(),
},
},
expectedRemoved: []string{"1706", "1876"},
},
}
for _, test := range tests {
kubelet, fakeDocker, _, _ := newTestKubelet(t)
kubelet.maxContainerCount = 2
fakeDocker.ContainerList = test.containers
fakeDocker.ContainerMap = test.containerDetails
fakeDocker.Container = &docker.Container{ID: "error", Created: time.Now()}
err := kubelet.GarbageCollectContainers()
if err != nil {
t.Errorf("unexpected error: %v", err)
}
verifyStringArrayEqualsAnyOrder(t, test.expectedRemoved, fakeDocker.Removed)
}
}
func TestPurgeOldest(t *testing.T) {
created := time.Now()
tests := []struct {
ids []string
containerDetails map[string]*docker.Container
expectedRemoved []string
}{
{
ids: []string{"1", "2", "3", "4", "5"},
containerDetails: map[string]*docker.Container{
"1": {
State: docker.State{
Running: true,
},
ID: "1",
Created: created,
},
"2": {
State: docker.State{
Running: false,
},
ID: "2",
Created: created.Add(time.Second),
},
"3": {
State: docker.State{
Running: false,
},
ID: "3",
Created: created.Add(time.Second),
},
"4": {
State: docker.State{
Running: false,
},
ID: "4",
Created: created.Add(time.Second),
},
"5": {
State: docker.State{
Running: false,
},
ID: "5",
Created: created.Add(time.Second),
},
},
},
{
ids: []string{"1", "2", "3", "4", "5", "6"},
containerDetails: map[string]*docker.Container{
"1": {
State: docker.State{
Running: false,
},
ID: "1",
Created: created.Add(time.Second),
},
"2": {
State: docker.State{
Running: false,
},
ID: "2",
Created: created.Add(time.Millisecond),
},
"3": {
State: docker.State{
Running: false,
},
ID: "3",
Created: created.Add(time.Second),
},
"4": {
State: docker.State{
Running: false,
},
ID: "4",
Created: created.Add(time.Second),
},
"5": {
State: docker.State{
Running: false,
},
ID: "5",
Created: created.Add(time.Second),
},
"6": {
State: docker.State{
Running: false,
},
ID: "6",
Created: created.Add(time.Second),
},
},
expectedRemoved: []string{"2"},
},
{
ids: []string{"1", "2", "3", "4", "5", "6", "7"},
containerDetails: map[string]*docker.Container{
"1": {
State: docker.State{
Running: false,
},
ID: "1",
Created: created.Add(time.Second),
},
"2": {
State: docker.State{
Running: false,
},
ID: "2",
Created: created.Add(time.Millisecond),
},
"3": {
State: docker.State{
Running: false,
},
ID: "3",
Created: created.Add(time.Second),
},
"4": {
State: docker.State{
Running: false,
},
ID: "4",
Created: created.Add(time.Second),
},
"5": {
State: docker.State{
Running: false,
},
ID: "5",
Created: created.Add(time.Second),
},
"6": {
State: docker.State{
Running: false,
},
ID: "6",
Created: created.Add(time.Microsecond),
},
"7": {
State: docker.State{
Running: false,
},
ID: "7",
Created: created.Add(time.Second),
},
},
expectedRemoved: []string{"2", "6"},
},
}
for _, test := range tests {
kubelet, fakeDocker, _, _ := newTestKubelet(t)
kubelet.maxContainerCount = 5
fakeDocker.ContainerMap = test.containerDetails
kubelet.purgeOldest(test.ids)
if !reflect.DeepEqual(fakeDocker.Removed, test.expectedRemoved) {
t.Errorf("expected: %v, got: %v", test.expectedRemoved, fakeDocker.Removed)
}
}
}
func TestSyncPodsWithPullPolicy(t *testing.T) {
kubelet, fakeDocker, waitGroup, _ := newTestKubelet(t)
puller := kubelet.dockerPuller.(*dockertools.FakeDockerPuller)
puller.HasImages = []string{"existing_one", "want:latest"}
kubelet.podInfraContainerImage = "custom_image_name"
fakeDocker.ContainerList = []docker.APIContainers{}
waitGroup.Add(1)
err := kubelet.SyncPods([]api.BoundPod{
{
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},
},
},
},
}, emptyPodUIDs, time.Now())
if err != nil {
t.Errorf("unexpected error: %v", err)
}
waitGroup.Wait()
fakeDocker.Lock()
if !reflect.DeepEqual(puller.ImagesPulled, []string{"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
}
func TestMakeEnvironmentVariables(t *testing.T) {
services := []api.Service{
{
ObjectMeta: api.ObjectMeta{Name: "kubernetes", Namespace: api.NamespaceDefault},
Spec: api.ServiceSpec{
Port: 8081,
PortalIP: "1.2.3.1",
},
},
{
ObjectMeta: api.ObjectMeta{Name: "kubernetes-ro", Namespace: api.NamespaceDefault},
Spec: api.ServiceSpec{
Port: 8082,
PortalIP: "1.2.3.2",
},
},
{
ObjectMeta: api.ObjectMeta{Name: "test", Namespace: "test1"},
Spec: api.ServiceSpec{
Port: 8083,
PortalIP: "1.2.3.3",
},
},
{
ObjectMeta: api.ObjectMeta{Name: "kubernetes", Namespace: "test2"},
Spec: api.ServiceSpec{
Port: 8084,
PortalIP: "1.2.3.4",
},
},
{
ObjectMeta: api.ObjectMeta{Name: "test", Namespace: "test2"},
Spec: api.ServiceSpec{
Port: 8085,
PortalIP: "1.2.3.5",
},
},
{
ObjectMeta: api.ObjectMeta{Name: "kubernetes", Namespace: "kubernetes"},
Spec: api.ServiceSpec{
Port: 8086,
PortalIP: "1.2.3.6",
},
},
{
ObjectMeta: api.ObjectMeta{Name: "kubernetes-ro", Namespace: "kubernetes"},
Spec: api.ServiceSpec{
Port: 8087,
PortalIP: "1.2.3.7",
},
},
{
ObjectMeta: api.ObjectMeta{Name: "not-special", Namespace: "kubernetes"},
Spec: api.ServiceSpec{
Port: 8088,
PortalIP: "1.2.3.8",
},
},
}
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 {
kl, _, _, _ := newTestKubelet(t)
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 TestPodPhaseWithRestartAlways(t *testing.T) {
desiredState := api.PodSpec{
Containers: []api.Container{
{Name: "containerA"},
{Name: "containerB"},
},
RestartPolicy: api.RestartPolicy{Always: &api.RestartPolicyAlways{}},
}
currentState := api.PodStatus{
Host: "machine",
}
runningState := api.ContainerStatus{
State: api.ContainerState{
Running: &api.ContainerStateRunning{},
},
}
stoppedState := api.ContainerStatus{
State: api.ContainerState{
Termination: &api.ContainerStateTerminated{},
},
}
tests := []struct {
pod *api.Pod
status api.PodPhase
test string
}{
{&api.Pod{Spec: desiredState, Status: currentState}, api.PodPending, "waiting"},
{
&api.Pod{
Spec: desiredState,
Status: api.PodStatus{
Info: map[string]api.ContainerStatus{
"containerA": runningState,
"containerB": runningState,
},
Host: "machine",
},
},
api.PodRunning,
"all running",
},
{
&api.Pod{
Spec: desiredState,
Status: api.PodStatus{
Info: map[string]api.ContainerStatus{
"containerA": stoppedState,
"containerB": stoppedState,
},
Host: "machine",
},
},
api.PodRunning,
"all stopped with restart always",
},
{
&api.Pod{
Spec: desiredState,
Status: api.PodStatus{
Info: map[string]api.ContainerStatus{
"containerA": runningState,
"containerB": stoppedState,
},
Host: "machine",
},
},
api.PodRunning,
"mixed state #1 with restart always",
},
{
&api.Pod{
Spec: desiredState,
Status: api.PodStatus{
Info: map[string]api.ContainerStatus{
"containerA": runningState,
},
Host: "machine",
},
},
api.PodPending,
"mixed state #2 with restart always",
},
}
for _, test := range tests {
if status := getPhase(&test.pod.Spec, test.pod.Status.Info); 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{
Containers: []api.Container{
{Name: "containerA"},
{Name: "containerB"},
},
RestartPolicy: api.RestartPolicy{Never: &api.RestartPolicyNever{}},
}
currentState := api.PodStatus{
Host: "machine",
}
runningState := api.ContainerStatus{
State: api.ContainerState{
Running: &api.ContainerStateRunning{},
},
}
succeededState := api.ContainerStatus{
State: api.ContainerState{
Termination: &api.ContainerStateTerminated{
ExitCode: 0,
},
},
}
failedState := api.ContainerStatus{
State: api.ContainerState{
Termination: &api.ContainerStateTerminated{
ExitCode: -1,
},
},
}
tests := []struct {
pod *api.Pod
status api.PodPhase
test string
}{
{&api.Pod{Spec: desiredState, Status: currentState}, api.PodPending, "waiting"},
{
&api.Pod{
Spec: desiredState,
Status: api.PodStatus{
Info: map[string]api.ContainerStatus{
"containerA": runningState,
"containerB": runningState,
},
Host: "machine",
},
},
api.PodRunning,
"all running with restart never",
},
{
&api.Pod{
Spec: desiredState,
Status: api.PodStatus{
Info: map[string]api.ContainerStatus{
"containerA": succeededState,
"containerB": succeededState,
},
Host: "machine",
},
},
api.PodSucceeded,
"all succeeded with restart never",
},
{
&api.Pod{
Spec: desiredState,
Status: api.PodStatus{
Info: map[string]api.ContainerStatus{
"containerA": failedState,
"containerB": failedState,
},
Host: "machine",
},
},
api.PodFailed,
"all failed with restart never",
},
{
&api.Pod{
Spec: desiredState,
Status: api.PodStatus{
Info: map[string]api.ContainerStatus{
"containerA": runningState,
"containerB": succeededState,
},
Host: "machine",
},
},
api.PodRunning,
"mixed state #1 with restart never",
},
{
&api.Pod{
Spec: desiredState,
Status: api.PodStatus{
Info: map[string]api.ContainerStatus{
"containerA": runningState,
},
Host: "machine",
},
},
api.PodPending,
"mixed state #2 with restart never",
},
}
for _, test := range tests {
if status := getPhase(&test.pod.Spec, test.pod.Status.Info); 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{
Containers: []api.Container{
{Name: "containerA"},
{Name: "containerB"},
},
RestartPolicy: api.RestartPolicy{OnFailure: &api.RestartPolicyOnFailure{}},
}
currentState := api.PodStatus{
Host: "machine",
}
runningState := api.ContainerStatus{
State: api.ContainerState{
Running: &api.ContainerStateRunning{},
},
}
succeededState := api.ContainerStatus{
State: api.ContainerState{
Termination: &api.ContainerStateTerminated{
ExitCode: 0,
},
},
}
failedState := api.ContainerStatus{
State: api.ContainerState{
Termination: &api.ContainerStateTerminated{
ExitCode: -1,
},
},
}
tests := []struct {
pod *api.Pod
status api.PodPhase
test string
}{
{&api.Pod{Spec: desiredState, Status: currentState}, api.PodPending, "waiting"},
{
&api.Pod{
Spec: desiredState,
Status: api.PodStatus{
Info: map[string]api.ContainerStatus{
"containerA": runningState,
"containerB": runningState,
},
Host: "machine",
},
},
api.PodRunning,
"all running with restart onfailure",
},
{
&api.Pod{
Spec: desiredState,
Status: api.PodStatus{
Info: map[string]api.ContainerStatus{
"containerA": succeededState,
"containerB": succeededState,
},
Host: "machine",
},
},
api.PodSucceeded,
"all succeeded with restart onfailure",
},
{
&api.Pod{
Spec: desiredState,
Status: api.PodStatus{
Info: map[string]api.ContainerStatus{
"containerA": failedState,
"containerB": failedState,
},
Host: "machine",
},
},
api.PodRunning,
"all failed with restart never",
},
{
&api.Pod{
Spec: desiredState,
Status: api.PodStatus{
Info: map[string]api.ContainerStatus{
"containerA": runningState,
"containerB": succeededState,
},
Host: "machine",
},
},
api.PodRunning,
"mixed state #1 with restart onfailure",
},
{
&api.Pod{
Spec: desiredState,
Status: api.PodStatus{
Info: map[string]api.ContainerStatus{
"containerA": runningState,
},
Host: "machine",
},
},
api.PodPending,
"mixed state #2 with restart onfailure",
},
}
for _, test := range tests {
if status := getPhase(&test.pod.Spec, test.pod.Status.Info); status != test.status {
t.Errorf("In test %s, expected %v, got %v", test.test, test.status, status)
}
}
}
func TestGetPodReadyCondition(t *testing.T) {
ready := []api.PodCondition{{
Type: api.PodReady,
Status: api.ConditionFull,
}}
unready := []api.PodCondition{{
Type: api.PodReady,
Status: api.ConditionNone,
}}
tests := []struct {
spec *api.PodSpec
info api.PodInfo
expected []api.PodCondition
}{
{
spec: nil,
info: nil,
expected: unready,
},
{
spec: &api.PodSpec{},
info: api.PodInfo{},
expected: ready,
},
{
spec: &api.PodSpec{
Containers: []api.Container{
{Name: "1234"},
},
},
info: api.PodInfo{},
expected: unready,
},
{
spec: &api.PodSpec{
Containers: []api.Container{
{Name: "1234"},
},
},
info: api.PodInfo{
"1234": api.ContainerStatus{Ready: true},
},
expected: ready,
},
{
spec: &api.PodSpec{
Containers: []api.Container{
{Name: "1234"},
{Name: "5678"},
},
},
info: api.PodInfo{
"1234": api.ContainerStatus{Ready: true},
"5678": api.ContainerStatus{Ready: true},
},
expected: ready,
},
{
spec: &api.PodSpec{
Containers: []api.Container{
{Name: "1234"},
{Name: "5678"},
},
},
info: api.PodInfo{
"1234": api.ContainerStatus{Ready: true},
},
expected: unready,
},
{
spec: &api.PodSpec{
Containers: []api.Container{
{Name: "1234"},
{Name: "5678"},
},
},
info: api.PodInfo{
"1234": api.ContainerStatus{Ready: true},
"5678": api.ContainerStatus{Ready: false},
},
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{}
kubelet, fakeDocker, _, _ := newTestKubelet(t)
fakeDocker.ContainerList = []docker.APIContainers{}
kubelet.runner = &fakeCommandRunner
podName := "podFoo"
podNamespace := "etcd"
containerName := "containerFoo"
err := kubelet.ExecInContainer(
GetPodFullName(&api.BoundPod{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{}
kubelet, fakeDocker, _, _ := newTestKubelet(t)
kubelet.runner = &fakeCommandRunner
podName := "podFoo"
podNamespace := "etcd"
containerID := "containerFoo"
fakeDocker.ContainerList = []docker.APIContainers{
{
ID: "notfound",
Names: []string{"/k8s_notfound_" + podName + "_" + podNamespace + "_12345678_42"},
},
}
err := kubelet.ExecInContainer(
GetPodFullName(&api.BoundPod{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{}
kubelet, fakeDocker, _, _ := newTestKubelet(t)
kubelet.runner = &fakeCommandRunner
podName := "podFoo"
podNamespace := "etcd"
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(
GetPodFullName(&api.BoundPod{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{}
kubelet, fakeDocker, _, _ := newTestKubelet(t)
fakeDocker.ContainerList = []docker.APIContainers{}
kubelet.runner = &fakeCommandRunner
podName := "podFoo"
podNamespace := "etcd"
var port uint16 = 5000
err := kubelet.PortForward(
GetPodFullName(&api.BoundPod{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{}
kubelet, fakeDocker, _, _ := newTestKubelet(t)
kubelet.runner = &fakeCommandRunner
podName := "podFoo"
podNamespace := "etcd"
var port uint16 = 5000
fakeDocker.ContainerList = []docker.APIContainers{
{
ID: "notfound",
Names: []string{"/k8s_notfound_" + podName + "_" + podNamespace + "_12345678_42"},
},
}
err := kubelet.PortForward(
GetPodFullName(&api.BoundPod{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{}
kubelet, fakeDocker, _, _ := newTestKubelet(t)
kubelet.runner = &fakeCommandRunner
podName := "podFoo"
podNamespace := "etcd"
containerID := "containerFoo"
var port uint16 = 5000
stream := &fakeReadWriteCloser{}
infraContainerID := "infra"
kubelet.podInfraContainerImage = "POD"
fakeDocker.ContainerList = []docker.APIContainers{
{
ID: infraContainerID,
Names: []string{"/k8s_" + kubelet.podInfraContainerImage + "_" + podName + "_" + podNamespace + "_12345678_42"},
},
{
ID: containerID,
Names: []string{"/k8s_" + containerID + "_" + podName + "_" + podNamespace + "_12345678_42"},
},
}
err := kubelet.PortForward(
GetPodFullName(&api.BoundPod{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.BoundPod{
{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 := getHostPortConflicts(pods)
if len(conflicts) != 0 {
t.Errorf("expected no conflicts, Got %#v", conflicts)
}
// The new pod should cause conflict and be reported.
expected := api.BoundPod{
Spec: api.PodSpec{Containers: []api.Container{{Ports: []api.ContainerPort{{HostPort: 81}}}}},
}
pods = append(pods, expected)
if actual := getHostPortConflicts(pods); !reflect.DeepEqual(actual, []api.BoundPod{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) {
kl, _, _, _ := newTestKubelet(t)
spec := api.PodSpec{Containers: []api.Container{{Ports: []api.ContainerPort{{HostPort: 80}}}}}
pods := []api.BoundPod{
{
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 BoundPods 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 := GetPodFullName(&pods[0])
kl.handleHostPortConflicts(pods)
if len(kl.podStatuses) != 1 {
t.Fatalf("expected length of status map to be 1. Got map %#v.", kl.podStatuses)
}
// Check pod status stored in the status map.
status, ok := kl.podStatuses[conflictedPodName]
if !ok {
t.Fatalf("status of pod %q is not found in the status map.", conflictedPodName)
}
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.pods = 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)
}
}
func TestPurgingObsoleteStatusMapEntries(t *testing.T) {
kl, _, _, _ := newTestKubelet(t)
pods := []api.BoundPod{
{Spec: api.PodSpec{Containers: []api.Container{{Ports: []api.ContainerPort{{HostPort: 80}}}}}},
{Spec: api.PodSpec{Containers: []api.Container{{Ports: []api.ContainerPort{{HostPort: 80}}}}}},
}
// Run once to populate the status map.
kl.handleHostPortConflicts(pods)
if len(kl.podStatuses) != 1 {
t.Fatalf("expected length of status map to be 1. Got map %#v.", kl.podStatuses)
}
// Sync with empty pods so that the entry in status map will be removed.
kl.SyncPods([]api.BoundPod{}, emptyPodUIDs, time.Now())
if len(kl.podStatuses) != 0 {
t.Fatalf("expected length of status map to be 0. Got map %#v.", kl.podStatuses)
}
}
func TestValidatePodStatus(t *testing.T) {
kubelet, _, _, _ := newTestKubelet(t)
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) {
kubelet, _, _, _ := newTestKubelet(t)
containerName := "x"
testCases := []struct {
podInfo api.PodInfo
success bool
}{
{
podInfo: api.PodInfo{containerName: api.ContainerStatus{State: api.ContainerState{Running: &api.ContainerStateRunning{}}}},
success: true,
},
{
podInfo: api.PodInfo{containerName: api.ContainerStatus{State: api.ContainerState{Termination: &api.ContainerStateTerminated{}}}},
success: true,
},
{
podInfo: api.PodInfo{containerName: api.ContainerStatus{State: api.ContainerState{Waiting: &api.ContainerStateWaiting{}}}},
success: false,
},
}
for i, tc := range testCases {
_, err := kubelet.validateContainerStatus(&api.PodStatus{
Info: tc.podInfo,
}, 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{
Info: testCases[0].podInfo,
}, "blah"); err == nil {
t.Errorf("expected error with invalid container name")
}
}
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