mirror of
https://github.com/optim-enterprises-bv/kubernetes.git
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b36f637f0d
As the final step, add the `dockerless` tags to all files in the dockershim. Using `-tags=dockerless` in `go build`, we can compile kubelet without the dockershim. Once cadvisor no longer depends on `docker/docker`, compiling with `-tags=dockerless` should be sufficient to compile the Kubelet w/o a dependency on `docker/docker`.
441 lines
12 KiB
Go
441 lines
12 KiB
Go
// +build !dockerless
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/*
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Copyright 2016 The Kubernetes Authors.
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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 dockershim
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import (
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"bytes"
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"errors"
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"fmt"
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"sync"
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"testing"
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dockertypes "github.com/docker/docker/api/types"
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dockernat "github.com/docker/go-connections/nat"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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"k8s.io/api/core/v1"
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runtimeapi "k8s.io/cri-api/pkg/apis/runtime/v1alpha2"
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"k8s.io/kubernetes/pkg/kubelet/dockershim/libdocker"
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)
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func TestLabelsAndAnnotationsRoundTrip(t *testing.T) {
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expectedLabels := map[string]string{"foo.123.abc": "baz", "bar.456.xyz": "qwe"}
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expectedAnnotations := map[string]string{"uio.ert": "dfs", "jkl": "asd"}
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// Merge labels and annotations into docker labels.
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dockerLabels := makeLabels(expectedLabels, expectedAnnotations)
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// Extract labels and annotations from docker labels.
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actualLabels, actualAnnotations := extractLabels(dockerLabels)
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assert.Equal(t, expectedLabels, actualLabels)
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assert.Equal(t, expectedAnnotations, actualAnnotations)
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}
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// TestGetApparmorSecurityOpts tests the logic of generating container apparmor options from sandbox annotations.
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func TestGetApparmorSecurityOpts(t *testing.T) {
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makeConfig := func(profile string) *runtimeapi.LinuxContainerSecurityContext {
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return &runtimeapi.LinuxContainerSecurityContext{
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ApparmorProfile: profile,
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}
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}
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tests := []struct {
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msg string
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config *runtimeapi.LinuxContainerSecurityContext
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expectedOpts []string
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}{{
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msg: "No AppArmor options",
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config: makeConfig(""),
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expectedOpts: nil,
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}, {
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msg: "AppArmor runtime/default",
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config: makeConfig("runtime/default"),
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expectedOpts: []string{},
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}, {
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msg: "AppArmor local profile",
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config: makeConfig(v1.AppArmorBetaProfileNamePrefix + "foo"),
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expectedOpts: []string{"apparmor=foo"},
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}}
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for i, test := range tests {
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opts, err := getApparmorSecurityOpts(test.config, '=')
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assert.NoError(t, err, "TestCase[%d]: %s", i, test.msg)
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assert.Len(t, opts, len(test.expectedOpts), "TestCase[%d]: %s", i, test.msg)
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for _, opt := range test.expectedOpts {
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assert.Contains(t, opts, opt, "TestCase[%d]: %s", i, test.msg)
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}
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}
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}
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// TestGetUserFromImageUser tests the logic of getting image uid or user name of image user.
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func TestGetUserFromImageUser(t *testing.T) {
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newI64 := func(i int64) *int64 { return &i }
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for c, test := range map[string]struct {
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user string
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uid *int64
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name string
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}{
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"no gid": {
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user: "0",
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uid: newI64(0),
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},
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"uid/gid": {
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user: "0:1",
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uid: newI64(0),
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},
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"empty user": {
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user: "",
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},
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"multiple spearators": {
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user: "1:2:3",
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uid: newI64(1),
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},
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"root username": {
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user: "root:root",
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name: "root",
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},
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"username": {
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user: "test:test",
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name: "test",
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},
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} {
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t.Logf("TestCase - %q", c)
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actualUID, actualName := getUserFromImageUser(test.user)
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assert.Equal(t, test.uid, actualUID)
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assert.Equal(t, test.name, actualName)
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}
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}
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func TestParsingCreationConflictError(t *testing.T) {
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// Expected error message from docker.
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msgs := []string{
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"Conflict. The name \"/k8s_POD_pfpod_e2e-tests-port-forwarding-dlxt2_81a3469e-99e1-11e6-89f2-42010af00002_0\" is already in use by container 24666ab8c814d16f986449e504ea0159468ddf8da01897144a770f66dce0e14e. You have to remove (or rename) that container to be able to reuse that name.",
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"Conflict. The name \"/k8s_POD_pfpod_e2e-tests-port-forwarding-dlxt2_81a3469e-99e1-11e6-89f2-42010af00002_0\" is already in use by container \"24666ab8c814d16f986449e504ea0159468ddf8da01897144a770f66dce0e14e\". You have to remove (or rename) that container to be able to reuse that name.",
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}
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for _, msg := range msgs {
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matches := conflictRE.FindStringSubmatch(msg)
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require.Len(t, matches, 2)
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require.Equal(t, matches[1], "24666ab8c814d16f986449e504ea0159468ddf8da01897144a770f66dce0e14e")
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}
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}
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func TestEnsureSandboxImageExists(t *testing.T) {
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sandboxImage := "gcr.io/test/image"
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authConfig := dockertypes.AuthConfig{Username: "user", Password: "pass"}
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for desc, test := range map[string]struct {
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injectImage bool
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imgNeedsAuth bool
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injectErr error
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calls []string
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err bool
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configJSON string
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}{
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"should not pull image when it already exists": {
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injectImage: true,
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injectErr: nil,
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calls: []string{"inspect_image"},
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},
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"should pull image when it doesn't exist": {
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injectImage: false,
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injectErr: libdocker.ImageNotFoundError{ID: "image_id"},
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calls: []string{"inspect_image", "pull"},
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},
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"should return error when inspect image fails": {
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injectImage: false,
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injectErr: fmt.Errorf("arbitrary error"),
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calls: []string{"inspect_image"},
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err: true,
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},
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"should return error when image pull needs private auth, but none provided": {
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injectImage: true,
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imgNeedsAuth: true,
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injectErr: libdocker.ImageNotFoundError{ID: "image_id"},
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calls: []string{"inspect_image", "pull"},
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err: true,
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},
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} {
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t.Logf("TestCase: %q", desc)
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_, fakeDocker, _ := newTestDockerService()
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if test.injectImage {
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images := []dockertypes.ImageSummary{{ID: sandboxImage}}
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fakeDocker.InjectImages(images)
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if test.imgNeedsAuth {
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fakeDocker.MakeImagesPrivate(images, authConfig)
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}
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}
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fakeDocker.InjectError("inspect_image", test.injectErr)
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err := ensureSandboxImageExists(fakeDocker, sandboxImage)
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assert.NoError(t, fakeDocker.AssertCalls(test.calls))
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assert.Equal(t, test.err, err != nil)
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}
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}
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func TestMakePortsAndBindings(t *testing.T) {
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for desc, test := range map[string]struct {
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pm []*runtimeapi.PortMapping
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exposedPorts dockernat.PortSet
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portmappings map[dockernat.Port][]dockernat.PortBinding
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}{
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"no port mapping": {
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pm: nil,
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exposedPorts: map[dockernat.Port]struct{}{},
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portmappings: map[dockernat.Port][]dockernat.PortBinding{},
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},
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"tcp port mapping": {
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pm: []*runtimeapi.PortMapping{
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{
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Protocol: runtimeapi.Protocol_TCP,
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ContainerPort: 80,
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HostPort: 80,
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},
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},
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exposedPorts: map[dockernat.Port]struct{}{
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"80/tcp": {},
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},
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portmappings: map[dockernat.Port][]dockernat.PortBinding{
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"80/tcp": {
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{
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HostPort: "80",
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},
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},
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},
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},
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"udp port mapping": {
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pm: []*runtimeapi.PortMapping{
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{
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Protocol: runtimeapi.Protocol_UDP,
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ContainerPort: 80,
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HostPort: 80,
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},
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},
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exposedPorts: map[dockernat.Port]struct{}{
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"80/udp": {},
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},
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portmappings: map[dockernat.Port][]dockernat.PortBinding{
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"80/udp": {
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{
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HostPort: "80",
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},
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},
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},
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},
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"multiple port mappings": {
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pm: []*runtimeapi.PortMapping{
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{
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Protocol: runtimeapi.Protocol_TCP,
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ContainerPort: 80,
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HostPort: 80,
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},
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{
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Protocol: runtimeapi.Protocol_TCP,
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ContainerPort: 80,
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HostPort: 81,
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},
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},
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exposedPorts: map[dockernat.Port]struct{}{
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"80/tcp": {},
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},
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portmappings: map[dockernat.Port][]dockernat.PortBinding{
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"80/tcp": {
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{
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HostPort: "80",
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},
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{
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HostPort: "81",
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},
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},
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},
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},
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} {
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t.Logf("TestCase: %s", desc)
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actualExposedPorts, actualPortMappings := makePortsAndBindings(test.pm)
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assert.Equal(t, test.exposedPorts, actualExposedPorts)
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assert.Equal(t, test.portmappings, actualPortMappings)
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}
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}
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func TestGenerateMountBindings(t *testing.T) {
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mounts := []*runtimeapi.Mount{
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// everything default
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{
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HostPath: "/mnt/1",
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ContainerPath: "/var/lib/mysql/1",
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},
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// readOnly
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{
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HostPath: "/mnt/2",
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ContainerPath: "/var/lib/mysql/2",
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Readonly: true,
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},
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// SELinux
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{
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HostPath: "/mnt/3",
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ContainerPath: "/var/lib/mysql/3",
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SelinuxRelabel: true,
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},
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// Propagation private
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{
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HostPath: "/mnt/4",
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ContainerPath: "/var/lib/mysql/4",
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Propagation: runtimeapi.MountPropagation_PROPAGATION_PRIVATE,
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},
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// Propagation rslave
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{
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HostPath: "/mnt/5",
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ContainerPath: "/var/lib/mysql/5",
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Propagation: runtimeapi.MountPropagation_PROPAGATION_HOST_TO_CONTAINER,
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},
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// Propagation rshared
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{
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HostPath: "/mnt/6",
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ContainerPath: "/var/lib/mysql/6",
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Propagation: runtimeapi.MountPropagation_PROPAGATION_BIDIRECTIONAL,
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},
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// Propagation unknown (falls back to private)
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{
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HostPath: "/mnt/7",
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ContainerPath: "/var/lib/mysql/7",
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Propagation: runtimeapi.MountPropagation(42),
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},
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// Everything
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{
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HostPath: "/mnt/8",
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ContainerPath: "/var/lib/mysql/8",
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Readonly: true,
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SelinuxRelabel: true,
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Propagation: runtimeapi.MountPropagation_PROPAGATION_BIDIRECTIONAL,
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},
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}
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expectedResult := []string{
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"/mnt/1:/var/lib/mysql/1",
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"/mnt/2:/var/lib/mysql/2:ro",
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"/mnt/3:/var/lib/mysql/3:Z",
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"/mnt/4:/var/lib/mysql/4",
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"/mnt/5:/var/lib/mysql/5:rslave",
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"/mnt/6:/var/lib/mysql/6:rshared",
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"/mnt/7:/var/lib/mysql/7",
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"/mnt/8:/var/lib/mysql/8:ro,Z,rshared",
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}
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result := generateMountBindings(mounts)
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assert.Equal(t, expectedResult, result)
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}
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func TestLimitedWriter(t *testing.T) {
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max := func(x, y int64) int64 {
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if x > y {
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return x
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}
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return y
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}
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for name, tc := range map[string]struct {
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w bytes.Buffer
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toWrite string
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limit int64
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wants string
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wantsErr error
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}{
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"nil": {},
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"neg": {
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toWrite: "a",
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wantsErr: errMaximumWrite,
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limit: -1,
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},
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"1byte-over": {
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toWrite: "a",
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wantsErr: errMaximumWrite,
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},
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"1byte-maxed": {
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toWrite: "a",
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wants: "a",
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limit: 1,
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},
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"1byte-under": {
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toWrite: "a",
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wants: "a",
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limit: 2,
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},
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"6byte-over": {
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toWrite: "foobar",
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wants: "foo",
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limit: 3,
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wantsErr: errMaximumWrite,
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},
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"6byte-maxed": {
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toWrite: "foobar",
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wants: "foobar",
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limit: 6,
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},
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"6byte-under": {
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toWrite: "foobar",
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wants: "foobar",
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limit: 20,
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},
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} {
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t.Run(name, func(t *testing.T) {
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limit := tc.limit
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w := sharedLimitWriter(&tc.w, &limit)
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n, err := w.Write([]byte(tc.toWrite))
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if int64(n) > max(0, tc.limit) {
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t.Fatalf("bytes written (%d) exceeds limit (%d)", n, tc.limit)
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}
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if (err != nil) != (tc.wantsErr != nil) {
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if err != nil {
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t.Fatal("unexpected error:", err)
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}
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t.Fatal("expected error:", err)
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}
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if err != nil {
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if !errors.Is(err, tc.wantsErr) {
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t.Fatal("expected error: ", tc.wantsErr, " instead of: ", err)
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}
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if !errors.Is(err, errMaximumWrite) {
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return
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}
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// check contents for errMaximumWrite
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}
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if s := tc.w.String(); s != tc.wants {
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t.Fatalf("expected %q instead of %q", tc.wants, s)
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}
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})
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}
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// test concurrency. run this test a bunch of times to attempt to flush
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// out any data races or concurrency issues.
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for i := 0; i < 1000; i++ {
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var (
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b1, b2 bytes.Buffer
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limit = int64(10)
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w1 = sharedLimitWriter(&b1, &limit)
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w2 = sharedLimitWriter(&b2, &limit)
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ch = make(chan struct{})
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wg sync.WaitGroup
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)
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wg.Add(2)
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go func() { defer wg.Done(); <-ch; w1.Write([]byte("hello")) }()
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go func() { defer wg.Done(); <-ch; w2.Write([]byte("world")) }()
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close(ch)
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wg.Wait()
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if limit != 0 {
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t.Fatalf("expected max limit to be reached, instead of %d", limit)
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}
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}
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}
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