mirror of
https://github.com/optim-enterprises-bv/kubernetes.git
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701 lines
18 KiB
Go
701 lines
18 KiB
Go
/*
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Copyright 2014 The Kubernetes Authors All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package dockertools
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import (
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"errors"
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"fmt"
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"reflect"
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"sort"
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"testing"
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"time"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/api/testapi"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/client/record"
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kubecontainer "github.com/GoogleCloudPlatform/kubernetes/pkg/kubelet/container"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/kubelet/network"
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kubeprober "github.com/GoogleCloudPlatform/kubernetes/pkg/kubelet/prober"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/probe"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/types"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
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uexec "github.com/GoogleCloudPlatform/kubernetes/pkg/util/exec"
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"github.com/fsouza/go-dockerclient"
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)
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func newTestDockerManager() (*DockerManager, *FakeDockerClient) {
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fakeDocker := &FakeDockerClient{VersionInfo: docker.Env{"Version=1.1.3", "ApiVersion=1.15"}, Errors: make(map[string]error), RemovedImages: util.StringSet{}}
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fakeRecorder := &record.FakeRecorder{}
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readinessManager := kubecontainer.NewReadinessManager()
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containerRefManager := kubecontainer.NewRefManager()
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networkPlugin, _ := network.InitNetworkPlugin([]network.NetworkPlugin{}, "", network.NewFakeHost(nil))
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dockerManager := NewFakeDockerManager(
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fakeDocker,
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fakeRecorder,
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readinessManager,
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containerRefManager,
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PodInfraContainerImage,
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0, 0, "",
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kubecontainer.FakeOS{},
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networkPlugin,
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nil,
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nil,
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nil)
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return dockerManager, fakeDocker
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}
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func TestSetEntrypointAndCommand(t *testing.T) {
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cases := []struct {
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name string
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container *api.Container
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expected *docker.CreateContainerOptions
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}{
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{
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name: "none",
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container: &api.Container{},
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expected: &docker.CreateContainerOptions{
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Config: &docker.Config{},
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},
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},
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{
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name: "command",
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container: &api.Container{
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Command: []string{"foo", "bar"},
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},
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expected: &docker.CreateContainerOptions{
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Config: &docker.Config{
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Entrypoint: []string{"foo", "bar"},
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},
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},
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},
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{
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name: "args",
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container: &api.Container{
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Args: []string{"foo", "bar"},
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},
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expected: &docker.CreateContainerOptions{
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Config: &docker.Config{
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Cmd: []string{"foo", "bar"},
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},
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},
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},
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{
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name: "both",
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container: &api.Container{
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Command: []string{"foo"},
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Args: []string{"bar", "baz"},
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},
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expected: &docker.CreateContainerOptions{
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Config: &docker.Config{
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Entrypoint: []string{"foo"},
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Cmd: []string{"bar", "baz"},
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},
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},
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},
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}
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for _, tc := range cases {
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actualOpts := &docker.CreateContainerOptions{
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Config: &docker.Config{},
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}
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setEntrypointAndCommand(tc.container, actualOpts)
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if e, a := tc.expected.Config.Entrypoint, actualOpts.Config.Entrypoint; !api.Semantic.DeepEqual(e, a) {
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t.Errorf("%v: unexpected entrypoint: expected %v, got %v", tc.name, e, a)
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}
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if e, a := tc.expected.Config.Cmd, actualOpts.Config.Cmd; !api.Semantic.DeepEqual(e, a) {
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t.Errorf("%v: unexpected command: expected %v, got %v", tc.name, e, a)
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}
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}
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}
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// verifyPods returns true if the two pod slices are equal.
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func verifyPods(a, b []*kubecontainer.Pod) bool {
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if len(a) != len(b) {
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return false
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}
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// Sort the containers within a pod.
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for i := range a {
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sort.Sort(containersByID(a[i].Containers))
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}
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for i := range b {
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sort.Sort(containersByID(b[i].Containers))
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}
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// Sort the pods by UID.
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sort.Sort(podsByID(a))
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sort.Sort(podsByID(b))
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return reflect.DeepEqual(a, b)
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}
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func TestGetPods(t *testing.T) {
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manager, fakeDocker := newTestDockerManager()
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dockerContainers := []docker.APIContainers{
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{
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ID: "1111",
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Names: []string{"/k8s_foo_qux_new_1234_42"},
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},
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{
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ID: "2222",
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Names: []string{"/k8s_bar_qux_new_1234_42"},
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},
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{
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ID: "3333",
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Names: []string{"/k8s_bar_jlk_wen_5678_42"},
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},
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}
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// Convert the docker containers. This does not affect the test coverage
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// because the conversion is tested separately in convert_test.go
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containers := make([]*kubecontainer.Container, len(dockerContainers))
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for i := range containers {
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c, err := toRuntimeContainer(&dockerContainers[i])
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if err != nil {
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t.Fatalf("unexpected error %v", err)
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}
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containers[i] = c
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}
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expected := []*kubecontainer.Pod{
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{
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ID: types.UID("1234"),
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Name: "qux",
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Namespace: "new",
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Containers: []*kubecontainer.Container{containers[0], containers[1]},
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},
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{
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ID: types.UID("5678"),
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Name: "jlk",
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Namespace: "wen",
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Containers: []*kubecontainer.Container{containers[2]},
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},
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}
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fakeDocker.ContainerList = dockerContainers
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actual, err := manager.GetPods(false)
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if err != nil {
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t.Fatalf("unexpected error %v", err)
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}
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if !verifyPods(expected, actual) {
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t.Errorf("expected %#v, got %#v", expected, actual)
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}
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}
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func TestListImages(t *testing.T) {
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manager, fakeDocker := newTestDockerManager()
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dockerImages := []docker.APIImages{{ID: "1111"}, {ID: "2222"}, {ID: "3333"}}
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expected := util.NewStringSet([]string{"1111", "2222", "3333"}...)
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fakeDocker.Images = dockerImages
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actualImages, err := manager.ListImages()
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if err != nil {
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t.Fatalf("unexpected error %v", err)
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}
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actual := util.NewStringSet()
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for _, i := range actualImages {
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actual.Insert(i.ID)
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}
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// We can compare the two sets directly because util.StringSet.List()
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// returns a "sorted" list.
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if !reflect.DeepEqual(expected.List(), actual.List()) {
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t.Errorf("expected %#v, got %#v", expected.List(), actual.List())
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}
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}
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func apiContainerToContainer(c docker.APIContainers) kubecontainer.Container {
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dockerName, hash, err := ParseDockerName(c.Names[0])
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if err != nil {
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return kubecontainer.Container{}
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}
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return kubecontainer.Container{
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ID: types.UID(c.ID),
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Name: dockerName.ContainerName,
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Hash: hash,
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}
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}
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func dockerContainersToPod(containers DockerContainers) kubecontainer.Pod {
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var pod kubecontainer.Pod
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for _, c := range containers {
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dockerName, hash, err := ParseDockerName(c.Names[0])
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if err != nil {
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continue
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}
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pod.Containers = append(pod.Containers, &kubecontainer.Container{
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ID: types.UID(c.ID),
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Name: dockerName.ContainerName,
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Hash: hash,
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Image: c.Image,
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})
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// TODO(yifan): Only one evaluation is enough.
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pod.ID = dockerName.PodUID
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name, namespace, _ := kubecontainer.ParsePodFullName(dockerName.PodFullName)
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pod.Name = name
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pod.Namespace = namespace
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}
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return pod
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}
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func TestKillContainerInPod(t *testing.T) {
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manager, fakeDocker := newTestDockerManager()
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pod := &api.Pod{
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ObjectMeta: api.ObjectMeta{
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UID: "12345678",
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Name: "qux",
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Namespace: "new",
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},
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Spec: api.PodSpec{Containers: []api.Container{{Name: "foo"}, {Name: "bar"}}},
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}
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containers := []docker.APIContainers{
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{
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ID: "1111",
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Names: []string{"/k8s_foo_qux_new_1234_42"},
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},
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{
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ID: "2222",
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Names: []string{"/k8s_bar_qux_new_1234_42"},
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},
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}
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containerToKill := &containers[0]
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containerToSpare := &containers[1]
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fakeDocker.ContainerList = containers
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// Set all containers to ready.
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for _, c := range fakeDocker.ContainerList {
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manager.readinessManager.SetReadiness(c.ID, true)
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}
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if err := manager.KillContainerInPod(pod.Spec.Containers[0], pod); err != nil {
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t.Errorf("unexpected error: %v", err)
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}
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// Assert the container has been stopped.
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if err := fakeDocker.AssertStopped([]string{containerToKill.ID}); err != nil {
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t.Errorf("container was not stopped correctly: %v", err)
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}
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// Verify that the readiness has been removed for the stopped container.
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if ready := manager.readinessManager.GetReadiness(containerToKill.ID); ready {
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t.Errorf("exepcted container entry ID '%v' to not be found. states: %+v", containerToKill.ID, ready)
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}
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if ready := manager.readinessManager.GetReadiness(containerToSpare.ID); !ready {
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t.Errorf("exepcted container entry ID '%v' to be found. states: %+v", containerToSpare.ID, ready)
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}
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}
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func TestKillContainerInPodWithPreStop(t *testing.T) {
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manager, fakeDocker := newTestDockerManager()
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fakeDocker.ExecInspect = &docker.ExecInspect{
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Running: false,
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ExitCode: 0,
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}
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expectedCmd := []string{"foo.sh", "bar"}
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pod := &api.Pod{
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ObjectMeta: api.ObjectMeta{
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UID: "12345678",
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Name: "qux",
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Namespace: "new",
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},
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Spec: api.PodSpec{
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Containers: []api.Container{
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{
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Name: "foo",
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Lifecycle: &api.Lifecycle{
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PreStop: &api.Handler{
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Exec: &api.ExecAction{
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Command: expectedCmd,
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},
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},
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},
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},
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{Name: "bar"}}},
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}
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podString, err := testapi.Codec().Encode(pod)
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if err != nil {
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t.Errorf("unexpected error: %v")
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}
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containers := []docker.APIContainers{
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{
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ID: "1111",
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Names: []string{"/k8s_foo_qux_new_1234_42"},
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},
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{
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ID: "2222",
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Names: []string{"/k8s_bar_qux_new_1234_42"},
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},
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}
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containerToKill := &containers[0]
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fakeDocker.ContainerList = containers
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fakeDocker.Container = &docker.Container{
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Config: &docker.Config{
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Labels: map[string]string{
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kubernetesPodLabel: string(podString),
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kubernetesContainerLabel: "foo",
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},
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},
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}
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// Set all containers to ready.
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for _, c := range fakeDocker.ContainerList {
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manager.readinessManager.SetReadiness(c.ID, true)
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}
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if err := manager.KillContainerInPod(pod.Spec.Containers[0], pod); err != nil {
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t.Errorf("unexpected error: %v", err)
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}
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// Assert the container has been stopped.
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if err := fakeDocker.AssertStopped([]string{containerToKill.ID}); err != nil {
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t.Errorf("container was not stopped correctly: %v", err)
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}
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verifyCalls(t, fakeDocker, []string{"list", "inspect_container", "create_exec", "start_exec", "stop"})
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if !reflect.DeepEqual(expectedCmd, fakeDocker.execCmd) {
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t.Errorf("expected: %v, got %v", expectedCmd, fakeDocker.execCmd)
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}
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}
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func TestKillContainerInPodWithError(t *testing.T) {
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manager, fakeDocker := newTestDockerManager()
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pod := &api.Pod{
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ObjectMeta: api.ObjectMeta{
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UID: "12345678",
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Name: "qux",
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Namespace: "new",
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},
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Spec: api.PodSpec{Containers: []api.Container{{Name: "foo"}, {Name: "bar"}}},
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}
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containers := []docker.APIContainers{
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{
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ID: "1111",
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Names: []string{"/k8s_foo_qux_new_1234_42"},
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},
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{
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ID: "2222",
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Names: []string{"/k8s_bar_qux_new_1234_42"},
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},
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}
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containerToKill := &containers[0]
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containerToSpare := &containers[1]
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fakeDocker.ContainerList = containers
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fakeDocker.Errors["stop"] = fmt.Errorf("sample error")
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// Set all containers to ready.
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for _, c := range fakeDocker.ContainerList {
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manager.readinessManager.SetReadiness(c.ID, true)
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}
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if err := manager.KillContainerInPod(pod.Spec.Containers[0], pod); err == nil {
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t.Errorf("expected error, found nil")
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}
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// Verify that the readiness has been removed even though the stop failed.
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if ready := manager.readinessManager.GetReadiness(containerToKill.ID); ready {
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t.Errorf("exepcted container entry ID '%v' to not be found. states: %+v", containerToKill.ID, ready)
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}
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if ready := manager.readinessManager.GetReadiness(containerToSpare.ID); !ready {
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t.Errorf("exepcted container entry ID '%v' to be found. states: %+v", containerToSpare.ID, ready)
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}
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}
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type fakeExecProber struct {
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result probe.Result
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err error
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}
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func (p fakeExecProber) Probe(_ uexec.Cmd) (probe.Result, error) {
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return p.result, p.err
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}
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func replaceProber(dm *DockerManager, result probe.Result, err error) {
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fakeExec := fakeExecProber{
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result: result,
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err: err,
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}
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dm.prober = kubeprober.NewTestProber(fakeExec, dm.readinessManager, dm.containerRefManager, &record.FakeRecorder{})
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return
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}
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// TestProbeContainer tests the functionality of probeContainer.
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// Test cases are:
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//
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// No probe.
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// Only LivenessProbe.
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// Only ReadinessProbe.
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// Both probes.
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//
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// Also, for each probe, there will be several cases covering whether the initial
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// delay has passed, whether the probe handler will return Success, Failure,
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// Unknown or error.
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//
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func TestProbeContainer(t *testing.T) {
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manager, _ := newTestDockerManager()
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dc := &docker.APIContainers{
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ID: "foobar",
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Created: time.Now().Unix(),
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}
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tests := []struct {
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testContainer api.Container
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expectError bool
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expectedResult probe.Result
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expectedReadiness bool
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}{
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// No probes.
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{
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testContainer: api.Container{},
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expectedResult: probe.Success,
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expectedReadiness: true,
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},
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// Only LivenessProbe.
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{
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testContainer: api.Container{
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LivenessProbe: &api.Probe{InitialDelaySeconds: 100},
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},
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expectedResult: probe.Success,
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expectedReadiness: true,
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},
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{
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testContainer: api.Container{
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LivenessProbe: &api.Probe{InitialDelaySeconds: -100},
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},
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expectedResult: probe.Unknown,
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expectedReadiness: false,
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},
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{
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testContainer: api.Container{
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LivenessProbe: &api.Probe{
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InitialDelaySeconds: -100,
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Handler: api.Handler{
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Exec: &api.ExecAction{},
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},
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},
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},
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expectedResult: probe.Failure,
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expectedReadiness: false,
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},
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{
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testContainer: api.Container{
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LivenessProbe: &api.Probe{
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InitialDelaySeconds: -100,
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Handler: api.Handler{
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Exec: &api.ExecAction{},
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},
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},
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},
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expectedResult: probe.Success,
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expectedReadiness: true,
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},
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{
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testContainer: api.Container{
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LivenessProbe: &api.Probe{
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InitialDelaySeconds: -100,
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Handler: api.Handler{
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Exec: &api.ExecAction{},
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},
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},
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},
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expectedResult: probe.Unknown,
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expectedReadiness: false,
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},
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{
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testContainer: api.Container{
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LivenessProbe: &api.Probe{
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InitialDelaySeconds: -100,
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Handler: api.Handler{
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Exec: &api.ExecAction{},
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},
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},
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},
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expectError: true,
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expectedResult: probe.Unknown,
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expectedReadiness: false,
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},
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// Only ReadinessProbe.
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{
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testContainer: api.Container{
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ReadinessProbe: &api.Probe{InitialDelaySeconds: 100},
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},
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expectedResult: probe.Success,
|
|
expectedReadiness: false,
|
|
},
|
|
{
|
|
testContainer: api.Container{
|
|
ReadinessProbe: &api.Probe{InitialDelaySeconds: -100},
|
|
},
|
|
expectedResult: probe.Success,
|
|
expectedReadiness: false,
|
|
},
|
|
{
|
|
testContainer: api.Container{
|
|
ReadinessProbe: &api.Probe{
|
|
InitialDelaySeconds: -100,
|
|
Handler: api.Handler{
|
|
Exec: &api.ExecAction{},
|
|
},
|
|
},
|
|
},
|
|
expectedResult: probe.Success,
|
|
expectedReadiness: true,
|
|
},
|
|
{
|
|
testContainer: api.Container{
|
|
ReadinessProbe: &api.Probe{
|
|
InitialDelaySeconds: -100,
|
|
Handler: api.Handler{
|
|
Exec: &api.ExecAction{},
|
|
},
|
|
},
|
|
},
|
|
expectedResult: probe.Success,
|
|
expectedReadiness: true,
|
|
},
|
|
{
|
|
testContainer: api.Container{
|
|
ReadinessProbe: &api.Probe{
|
|
InitialDelaySeconds: -100,
|
|
Handler: api.Handler{
|
|
Exec: &api.ExecAction{},
|
|
},
|
|
},
|
|
},
|
|
expectedResult: probe.Success,
|
|
expectedReadiness: true,
|
|
},
|
|
{
|
|
testContainer: api.Container{
|
|
ReadinessProbe: &api.Probe{
|
|
InitialDelaySeconds: -100,
|
|
Handler: api.Handler{
|
|
Exec: &api.ExecAction{},
|
|
},
|
|
},
|
|
},
|
|
expectError: false,
|
|
expectedResult: probe.Success,
|
|
expectedReadiness: true,
|
|
},
|
|
// Both LivenessProbe and ReadinessProbe.
|
|
{
|
|
testContainer: api.Container{
|
|
LivenessProbe: &api.Probe{InitialDelaySeconds: 100},
|
|
ReadinessProbe: &api.Probe{InitialDelaySeconds: 100},
|
|
},
|
|
expectedResult: probe.Success,
|
|
expectedReadiness: false,
|
|
},
|
|
{
|
|
testContainer: api.Container{
|
|
LivenessProbe: &api.Probe{InitialDelaySeconds: 100},
|
|
ReadinessProbe: &api.Probe{InitialDelaySeconds: -100},
|
|
},
|
|
expectedResult: probe.Success,
|
|
expectedReadiness: false,
|
|
},
|
|
{
|
|
testContainer: api.Container{
|
|
LivenessProbe: &api.Probe{InitialDelaySeconds: -100},
|
|
ReadinessProbe: &api.Probe{InitialDelaySeconds: 100},
|
|
},
|
|
expectedResult: probe.Unknown,
|
|
expectedReadiness: false,
|
|
},
|
|
{
|
|
testContainer: api.Container{
|
|
LivenessProbe: &api.Probe{InitialDelaySeconds: -100},
|
|
ReadinessProbe: &api.Probe{InitialDelaySeconds: -100},
|
|
},
|
|
expectedResult: probe.Unknown,
|
|
expectedReadiness: false,
|
|
},
|
|
{
|
|
testContainer: api.Container{
|
|
LivenessProbe: &api.Probe{
|
|
InitialDelaySeconds: -100,
|
|
Handler: api.Handler{
|
|
Exec: &api.ExecAction{},
|
|
},
|
|
},
|
|
ReadinessProbe: &api.Probe{InitialDelaySeconds: -100},
|
|
},
|
|
expectedResult: probe.Unknown,
|
|
expectedReadiness: false,
|
|
},
|
|
{
|
|
testContainer: api.Container{
|
|
LivenessProbe: &api.Probe{
|
|
InitialDelaySeconds: -100,
|
|
Handler: api.Handler{
|
|
Exec: &api.ExecAction{},
|
|
},
|
|
},
|
|
ReadinessProbe: &api.Probe{InitialDelaySeconds: -100},
|
|
},
|
|
expectedResult: probe.Failure,
|
|
expectedReadiness: false,
|
|
},
|
|
{
|
|
testContainer: api.Container{
|
|
LivenessProbe: &api.Probe{
|
|
InitialDelaySeconds: -100,
|
|
Handler: api.Handler{
|
|
Exec: &api.ExecAction{},
|
|
},
|
|
},
|
|
ReadinessProbe: &api.Probe{
|
|
InitialDelaySeconds: -100,
|
|
Handler: api.Handler{
|
|
Exec: &api.ExecAction{},
|
|
},
|
|
},
|
|
},
|
|
expectedResult: probe.Success,
|
|
expectedReadiness: true,
|
|
},
|
|
}
|
|
|
|
for _, test := range tests {
|
|
if test.expectError {
|
|
replaceProber(manager, test.expectedResult, errors.New("error"))
|
|
} else {
|
|
replaceProber(manager, test.expectedResult, nil)
|
|
}
|
|
result, err := manager.prober.Probe(&api.Pod{}, api.PodStatus{}, test.testContainer, dc.ID, dc.Created)
|
|
if test.expectError && err == nil {
|
|
t.Error("Expected error but did no error was returned.")
|
|
}
|
|
if !test.expectError && err != nil {
|
|
t.Errorf("Expected error but got: %v", err)
|
|
}
|
|
if test.expectedResult != result {
|
|
t.Errorf("Expected result was %v but probeContainer() returned %v", test.expectedResult, result)
|
|
}
|
|
if test.expectedReadiness != manager.readinessManager.GetReadiness(dc.ID) {
|
|
t.Errorf("Expected readiness was %v but probeContainer() set %v", test.expectedReadiness, manager.readinessManager.GetReadiness(dc.ID))
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestIsAExitError(t *testing.T) {
|
|
var err error
|
|
err = &dockerExitError{nil}
|
|
_, ok := err.(uexec.ExitError)
|
|
if !ok {
|
|
t.Error("couldn't cast dockerExitError to exec.ExitError")
|
|
}
|
|
}
|