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kubelet_pods_test.go
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/*
Copyright 2016 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package kubelet
import (
"bytes"
"errors"
"fmt"
"io/ioutil"
"os"
"path/filepath"
"sort"
"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"k8s.io/api/core/v1"
apierrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/types"
utilfeature "k8s.io/apiserver/pkg/util/feature"
core "k8s.io/client-go/testing"
"k8s.io/client-go/tools/record"
// TODO: remove this import if
// api.Registry.GroupOrDie(v1.GroupName).GroupVersion.String() is changed
// to "v1"?
"k8s.io/kubernetes/pkg/api/legacyscheme"
_ "k8s.io/kubernetes/pkg/apis/core/install"
runtimeapi "k8s.io/kubernetes/pkg/kubelet/apis/cri/runtime/v1alpha2"
kubecontainer "k8s.io/kubernetes/pkg/kubelet/container"
containertest "k8s.io/kubernetes/pkg/kubelet/container/testing"
"k8s.io/kubernetes/pkg/kubelet/server/portforward"
"k8s.io/kubernetes/pkg/kubelet/server/remotecommand"
"k8s.io/kubernetes/pkg/util/mount"
volumetest "k8s.io/kubernetes/pkg/volume/testing"
)
func TestMakeAbsolutePath(t *testing.T) {
tests := []struct {
goos string
path string
expectedPath string
name string
}{
{
goos: "linux",
path: "non-absolute/path",
expectedPath: "/non-absolute/path",
name: "basic linux",
},
{
goos: "windows",
path: "some\\path",
expectedPath: "c:\\some\\path",
name: "basic windows",
},
{
goos: "windows",
path: "/some/path",
expectedPath: "c:/some/path",
name: "linux path on windows",
},
{
goos: "windows",
path: "\\some\\path",
expectedPath: "c:\\some\\path",
name: "windows path no drive",
},
{
goos: "windows",
path: "\\:\\some\\path",
expectedPath: "\\:\\some\\path",
name: "windows path with colon",
},
}
for _, test := range tests {
path := makeAbsolutePath(test.goos, test.path)
if path != test.expectedPath {
t.Errorf("[%s] Expected %s saw %s", test.name, test.expectedPath, path)
}
}
}
func TestMakeMounts(t *testing.T) {
bTrue := true
propagationHostToContainer := v1.MountPropagationHostToContainer
propagationBidirectional := v1.MountPropagationBidirectional
propagationNone := v1.MountPropagationNone
testCases := map[string]struct {
container v1.Container
podVolumes kubecontainer.VolumeMap
expectErr bool
expectedErrMsg string
expectedMounts []kubecontainer.Mount
}{
"valid mounts in unprivileged container": {
podVolumes: kubecontainer.VolumeMap{
"disk": kubecontainer.VolumeInfo{Mounter: &stubVolume{path: "/mnt/disk"}},
"disk4": kubecontainer.VolumeInfo{Mounter: &stubVolume{path: "/mnt/host"}},
"disk5": kubecontainer.VolumeInfo{Mounter: &stubVolume{path: "/var/lib/kubelet/podID/volumes/empty/disk5"}},
},
container: v1.Container{
Name: "container1",
VolumeMounts: []v1.VolumeMount{
{
MountPath: "/etc/hosts",
Name: "disk",
ReadOnly: false,
MountPropagation: &propagationHostToContainer,
},
{
MountPath: "/mnt/path3",
Name: "disk",
ReadOnly: true,
MountPropagation: &propagationNone,
},
{
MountPath: "/mnt/path4",
Name: "disk4",
ReadOnly: false,
},
{
MountPath: "/mnt/path5",
Name: "disk5",
ReadOnly: false,
},
},
},
expectedMounts: []kubecontainer.Mount{
{
Name: "disk",
ContainerPath: "/etc/hosts",
HostPath: "/mnt/disk",
ReadOnly: false,
SELinuxRelabel: false,
Propagation: runtimeapi.MountPropagation_PROPAGATION_HOST_TO_CONTAINER,
},
{
Name: "disk",
ContainerPath: "/mnt/path3",
HostPath: "/mnt/disk",
ReadOnly: true,
SELinuxRelabel: false,
Propagation: runtimeapi.MountPropagation_PROPAGATION_PRIVATE,
},
{
Name: "disk4",
ContainerPath: "/mnt/path4",
HostPath: "/mnt/host",
ReadOnly: false,
SELinuxRelabel: false,
Propagation: runtimeapi.MountPropagation_PROPAGATION_PRIVATE,
},
{
Name: "disk5",
ContainerPath: "/mnt/path5",
HostPath: "/var/lib/kubelet/podID/volumes/empty/disk5",
ReadOnly: false,
SELinuxRelabel: false,
Propagation: runtimeapi.MountPropagation_PROPAGATION_PRIVATE,
},
},
expectErr: false,
},
"valid mounts in privileged container": {
podVolumes: kubecontainer.VolumeMap{
"disk": kubecontainer.VolumeInfo{Mounter: &stubVolume{path: "/mnt/disk"}},
"disk4": kubecontainer.VolumeInfo{Mounter: &stubVolume{path: "/mnt/host"}},
"disk5": kubecontainer.VolumeInfo{Mounter: &stubVolume{path: "/var/lib/kubelet/podID/volumes/empty/disk5"}},
},
container: v1.Container{
Name: "container1",
VolumeMounts: []v1.VolumeMount{
{
MountPath: "/etc/hosts",
Name: "disk",
ReadOnly: false,
MountPropagation: &propagationBidirectional,
},
{
MountPath: "/mnt/path3",
Name: "disk",
ReadOnly: true,
MountPropagation: &propagationHostToContainer,
},
{
MountPath: "/mnt/path4",
Name: "disk4",
ReadOnly: false,
},
},
SecurityContext: &v1.SecurityContext{
Privileged: &bTrue,
},
},
expectedMounts: []kubecontainer.Mount{
{
Name: "disk",
ContainerPath: "/etc/hosts",
HostPath: "/mnt/disk",
ReadOnly: false,
SELinuxRelabel: false,
Propagation: runtimeapi.MountPropagation_PROPAGATION_BIDIRECTIONAL,
},
{
Name: "disk",
ContainerPath: "/mnt/path3",
HostPath: "/mnt/disk",
ReadOnly: true,
SELinuxRelabel: false,
Propagation: runtimeapi.MountPropagation_PROPAGATION_HOST_TO_CONTAINER,
},
{
Name: "disk4",
ContainerPath: "/mnt/path4",
HostPath: "/mnt/host",
ReadOnly: false,
SELinuxRelabel: false,
Propagation: runtimeapi.MountPropagation_PROPAGATION_PRIVATE,
},
},
expectErr: false,
},
"invalid absolute SubPath": {
podVolumes: kubecontainer.VolumeMap{
"disk": kubecontainer.VolumeInfo{Mounter: &stubVolume{path: "/mnt/disk"}},
},
container: v1.Container{
VolumeMounts: []v1.VolumeMount{
{
MountPath: "/mnt/path3",
SubPath: "/must/not/be/absolute",
Name: "disk",
ReadOnly: true,
},
},
},
expectErr: true,
expectedErrMsg: "error SubPath `/must/not/be/absolute` must not be an absolute path",
},
"invalid SubPath with backsteps": {
podVolumes: kubecontainer.VolumeMap{
"disk": kubecontainer.VolumeInfo{Mounter: &stubVolume{path: "/mnt/disk"}},
},
container: v1.Container{
VolumeMounts: []v1.VolumeMount{
{
MountPath: "/mnt/path3",
SubPath: "no/backsteps/../allowed",
Name: "disk",
ReadOnly: true,
},
},
},
expectErr: true,
expectedErrMsg: "unable to provision SubPath `no/backsteps/../allowed`: must not contain '..'",
},
"volume doesn't exist": {
podVolumes: kubecontainer.VolumeMap{},
container: v1.Container{
VolumeMounts: []v1.VolumeMount{
{
MountPath: "/mnt/path3",
Name: "disk",
ReadOnly: true,
},
},
},
expectErr: true,
expectedErrMsg: "cannot find volume \"disk\" to mount into container \"\"",
},
"volume mounter is nil": {
podVolumes: kubecontainer.VolumeMap{
"disk": kubecontainer.VolumeInfo{},
},
container: v1.Container{
VolumeMounts: []v1.VolumeMount{
{
MountPath: "/mnt/path3",
Name: "disk",
ReadOnly: true,
},
},
},
expectErr: true,
expectedErrMsg: "cannot find volume \"disk\" to mount into container \"\"",
},
}
for name, tc := range testCases {
t.Run(name, func(t *testing.T) {
fm := &mount.FakeMounter{}
pod := v1.Pod{
Spec: v1.PodSpec{
HostNetwork: true,
},
}
// test makeMounts with enabled mount propagation
err := utilfeature.DefaultFeatureGate.Set("MountPropagation=true")
if err != nil {
t.Errorf("Failed to enable feature gate for MountPropagation: %v", err)
return
}
mounts, _, err := makeMounts(&pod, "/pod", &tc.container, "fakepodname", "", "", tc.podVolumes, fm)
// validate only the error if we expect an error
if tc.expectErr {
if err == nil || err.Error() != tc.expectedErrMsg {
t.Fatalf("expected error message `%s` but got `%v`", tc.expectedErrMsg, err)
}
return
}
// otherwise validate the mounts
if err != nil {
t.Fatal(err)
}
assert.Equal(t, tc.expectedMounts, mounts, "mounts of container %+v", tc.container)
// test makeMounts with disabled mount propagation
err = utilfeature.DefaultFeatureGate.Set("MountPropagation=false")
if err != nil {
t.Errorf("Failed to enable feature gate for MountPropagation: %v", err)
return
}
mounts, _, err = makeMounts(&pod, "/pod", &tc.container, "fakepodname", "", "", tc.podVolumes, fm)
if !tc.expectErr {
expectedPrivateMounts := []kubecontainer.Mount{}
for _, mount := range tc.expectedMounts {
// all mounts are expected to be private when mount
// propagation is disabled
mount.Propagation = runtimeapi.MountPropagation_PROPAGATION_PRIVATE
expectedPrivateMounts = append(expectedPrivateMounts, mount)
}
assert.Equal(t, expectedPrivateMounts, mounts, "mounts of container %+v", tc.container)
}
})
}
}
func TestDisabledSubpath(t *testing.T) {
fm := &mount.FakeMounter{}
pod := v1.Pod{
Spec: v1.PodSpec{
HostNetwork: true,
},
}
podVolumes := kubecontainer.VolumeMap{
"disk": kubecontainer.VolumeInfo{Mounter: &stubVolume{path: "/mnt/disk"}},
}
cases := map[string]struct {
container v1.Container
expectError bool
}{
"subpath not specified": {
v1.Container{
VolumeMounts: []v1.VolumeMount{
{
MountPath: "/mnt/path3",
Name: "disk",
ReadOnly: true,
},
},
},
false,
},
"subpath specified": {
v1.Container{
VolumeMounts: []v1.VolumeMount{
{
MountPath: "/mnt/path3",
SubPath: "/must/not/be/absolute",
Name: "disk",
ReadOnly: true,
},
},
},
true,
},
}
utilfeature.DefaultFeatureGate.Set("VolumeSubpath=false")
defer utilfeature.DefaultFeatureGate.Set("VolumeSubpath=true")
for name, test := range cases {
_, _, err := makeMounts(&pod, "/pod", &test.container, "fakepodname", "", "", podVolumes, fm)
if err != nil && !test.expectError {
t.Errorf("test %v failed: %v", name, err)
}
if err == nil && test.expectError {
t.Errorf("test %v failed: expected error", name)
}
}
}
func TestMakeBlockVolumes(t *testing.T) {
testKubelet := newTestKubelet(t, false /* controllerAttachDetachEnabled */)
defer testKubelet.Cleanup()
kubelet := testKubelet.kubelet
testCases := map[string]struct {
container v1.Container
podVolumes kubecontainer.VolumeMap
expectErr bool
expectedErrMsg string
expectedDevices []kubecontainer.DeviceInfo
}{
"valid volumeDevices in container": {
podVolumes: kubecontainer.VolumeMap{
"disk1": kubecontainer.VolumeInfo{BlockVolumeMapper: &stubBlockVolume{dirPath: "/dev/", volName: "sda"}},
"disk2": kubecontainer.VolumeInfo{BlockVolumeMapper: &stubBlockVolume{dirPath: "/dev/disk/by-path/", volName: "diskPath"}, ReadOnly: true},
"disk3": kubecontainer.VolumeInfo{BlockVolumeMapper: &stubBlockVolume{dirPath: "/dev/disk/by-id/", volName: "diskUuid"}},
"disk4": kubecontainer.VolumeInfo{BlockVolumeMapper: &stubBlockVolume{dirPath: "/var/lib/", volName: "rawdisk"}, ReadOnly: true},
},
container: v1.Container{
Name: "container1",
VolumeDevices: []v1.VolumeDevice{
{
DevicePath: "/dev/sda",
Name: "disk1",
},
{
DevicePath: "/dev/xvda",
Name: "disk2",
},
{
DevicePath: "/dev/xvdb",
Name: "disk3",
},
{
DevicePath: "/mnt/rawdisk",
Name: "disk4",
},
},
},
expectedDevices: []kubecontainer.DeviceInfo{
{
PathInContainer: "/dev/sda",
PathOnHost: "/dev/sda",
Permissions: "mrw",
},
{
PathInContainer: "/dev/xvda",
PathOnHost: "/dev/disk/by-path/diskPath",
Permissions: "r",
},
{
PathInContainer: "/dev/xvdb",
PathOnHost: "/dev/disk/by-id/diskUuid",
Permissions: "mrw",
},
{
PathInContainer: "/mnt/rawdisk",
PathOnHost: "/var/lib/rawdisk",
Permissions: "r",
},
},
expectErr: false,
},
"invalid absolute Path": {
podVolumes: kubecontainer.VolumeMap{
"disk": kubecontainer.VolumeInfo{BlockVolumeMapper: &stubBlockVolume{dirPath: "/dev/", volName: "sda"}},
},
container: v1.Container{
VolumeDevices: []v1.VolumeDevice{
{
DevicePath: "must/be/absolute",
Name: "disk",
},
},
},
expectErr: true,
expectedErrMsg: "error DevicePath `must/be/absolute` must be an absolute path",
},
"volume doesn't exist": {
podVolumes: kubecontainer.VolumeMap{},
container: v1.Container{
VolumeDevices: []v1.VolumeDevice{
{
DevicePath: "/dev/sdaa",
Name: "disk",
},
},
},
expectErr: true,
expectedErrMsg: "cannot find volume \"disk\" to pass into container \"\"",
},
"volume BlockVolumeMapper is nil": {
podVolumes: kubecontainer.VolumeMap{
"disk": kubecontainer.VolumeInfo{},
},
container: v1.Container{
VolumeDevices: []v1.VolumeDevice{
{
DevicePath: "/dev/sdzz",
Name: "disk",
},
},
},
expectErr: true,
expectedErrMsg: "cannot find volume \"disk\" to pass into container \"\"",
},
}
for name, tc := range testCases {
t.Run(name, func(t *testing.T) {
pod := v1.Pod{
Spec: v1.PodSpec{
HostNetwork: true,
},
}
blkutil := volumetest.NewBlockVolumePathHandler()
blkVolumes, err := kubelet.makeBlockVolumes(&pod, &tc.container, tc.podVolumes, blkutil)
// validate only the error if we expect an error
if tc.expectErr {
if err == nil || err.Error() != tc.expectedErrMsg {
t.Fatalf("expected error message `%s` but got `%v`", tc.expectedErrMsg, err)
}
return
}
// otherwise validate the devices
if err != nil {
t.Fatal(err)
}
assert.Equal(t, tc.expectedDevices, blkVolumes, "devices of container %+v", tc.container)
})
}
}
func TestNodeHostsFileContent(t *testing.T) {
testCases := []struct {
hostsFileName string
hostAliases []v1.HostAlias
rawHostsFileContent string
expectedHostsFileContent string
}{
{
"hosts_test_file1",
[]v1.HostAlias{},
`# hosts file for testing.
127.0.0.1 localhost
::1 localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
fe00::0 ip6-mcastprefix
fe00::1 ip6-allnodes
fe00::2 ip6-allrouters
123.45.67.89 some.domain
`,
`# hosts file for testing.
127.0.0.1 localhost
::1 localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
fe00::0 ip6-mcastprefix
fe00::1 ip6-allnodes
fe00::2 ip6-allrouters
123.45.67.89 some.domain
`,
},
{
"hosts_test_file2",
[]v1.HostAlias{},
`# another hosts file for testing.
127.0.0.1 localhost
::1 localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
fe00::0 ip6-mcastprefix
fe00::1 ip6-allnodes
fe00::2 ip6-allrouters
12.34.56.78 another.domain
`,
`# another hosts file for testing.
127.0.0.1 localhost
::1 localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
fe00::0 ip6-mcastprefix
fe00::1 ip6-allnodes
fe00::2 ip6-allrouters
12.34.56.78 another.domain
`,
},
{
"hosts_test_file1_with_host_aliases",
[]v1.HostAlias{
{IP: "123.45.67.89", Hostnames: []string{"foo", "bar", "baz"}},
},
`# hosts file for testing.
127.0.0.1 localhost
::1 localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
fe00::0 ip6-mcastprefix
fe00::1 ip6-allnodes
fe00::2 ip6-allrouters
123.45.67.89 some.domain
`,
`# hosts file for testing.
127.0.0.1 localhost
::1 localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
fe00::0 ip6-mcastprefix
fe00::1 ip6-allnodes
fe00::2 ip6-allrouters
123.45.67.89 some.domain
# Entries added by HostAliases.
123.45.67.89 foo
123.45.67.89 bar
123.45.67.89 baz
`,
},
{
"hosts_test_file2_with_host_aliases",
[]v1.HostAlias{
{IP: "123.45.67.89", Hostnames: []string{"foo", "bar", "baz"}},
{IP: "456.78.90.123", Hostnames: []string{"park", "doo", "boo"}},
},
`# another hosts file for testing.
127.0.0.1 localhost
::1 localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
fe00::0 ip6-mcastprefix
fe00::1 ip6-allnodes
fe00::2 ip6-allrouters
12.34.56.78 another.domain
`,
`# another hosts file for testing.
127.0.0.1 localhost
::1 localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
fe00::0 ip6-mcastprefix
fe00::1 ip6-allnodes
fe00::2 ip6-allrouters
12.34.56.78 another.domain
# Entries added by HostAliases.
123.45.67.89 foo
123.45.67.89 bar
123.45.67.89 baz
456.78.90.123 park
456.78.90.123 doo
456.78.90.123 boo
`,
},
}
for _, testCase := range testCases {
tmpdir, err := writeHostsFile(testCase.hostsFileName, testCase.rawHostsFileContent)
require.NoError(t, err, "could not create a temp hosts file")
defer os.RemoveAll(tmpdir)
actualContent, fileReadErr := nodeHostsFileContent(filepath.Join(tmpdir, testCase.hostsFileName), testCase.hostAliases)
require.NoError(t, fileReadErr, "could not create read hosts file")
assert.Equal(t, testCase.expectedHostsFileContent, string(actualContent), "hosts file content not expected")
}
}
// writeHostsFile will write a hosts file into a temporary dir, and return that dir.
// Caller is responsible for deleting the dir and its contents.
func writeHostsFile(filename string, cfg string) (string, error) {
tmpdir, err := ioutil.TempDir("", "kubelet=kubelet_pods_test.go=")
if err != nil {
return "", err
}
return tmpdir, ioutil.WriteFile(filepath.Join(tmpdir, filename), []byte(cfg), 0644)
}
func TestManagedHostsFileContent(t *testing.T) {
testCases := []struct {
hostIP string
hostName string
hostDomainName string
hostAliases []v1.HostAlias
expectedContent string
}{
{
"123.45.67.89",
"podFoo",
"",
[]v1.HostAlias{},
`# Kubernetes-managed hosts file.
127.0.0.1 localhost
::1 localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
fe00::0 ip6-mcastprefix
fe00::1 ip6-allnodes
fe00::2 ip6-allrouters
123.45.67.89 podFoo
`,
},
{
"203.0.113.1",
"podFoo",
"domainFoo",
[]v1.HostAlias{},
`# Kubernetes-managed hosts file.
127.0.0.1 localhost
::1 localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
fe00::0 ip6-mcastprefix
fe00::1 ip6-allnodes
fe00::2 ip6-allrouters
203.0.113.1 podFoo.domainFoo podFoo
`,
},
{
"203.0.113.1",
"podFoo",
"domainFoo",
[]v1.HostAlias{
{IP: "123.45.67.89", Hostnames: []string{"foo", "bar", "baz"}},
},
`# Kubernetes-managed hosts file.
127.0.0.1 localhost
::1 localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
fe00::0 ip6-mcastprefix
fe00::1 ip6-allnodes
fe00::2 ip6-allrouters
203.0.113.1 podFoo.domainFoo podFoo
# Entries added by HostAliases.
123.45.67.89 foo
123.45.67.89 bar
123.45.67.89 baz
`,
},
{
"203.0.113.1",
"podFoo",
"domainFoo",
[]v1.HostAlias{
{IP: "123.45.67.89", Hostnames: []string{"foo", "bar", "baz"}},
{IP: "456.78.90.123", Hostnames: []string{"park", "doo", "boo"}},
},
`# Kubernetes-managed hosts file.
127.0.0.1 localhost
::1 localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
fe00::0 ip6-mcastprefix
fe00::1 ip6-allnodes
fe00::2 ip6-allrouters
203.0.113.1 podFoo.domainFoo podFoo
# Entries added by HostAliases.
123.45.67.89 foo
123.45.67.89 bar
123.45.67.89 baz
456.78.90.123 park
456.78.90.123 doo
456.78.90.123 boo
`,
},
}
for _, testCase := range testCases {
actualContent := managedHostsFileContent(testCase.hostIP, testCase.hostName, testCase.hostDomainName, testCase.hostAliases)
assert.Equal(t, testCase.expectedContent, string(actualContent), "hosts file content not expected")
}
}
func TestRunInContainerNoSuchPod(t *testing.T) {
testKubelet := newTestKubelet(t, false /* controllerAttachDetachEnabled */)
defer testKubelet.Cleanup()
kubelet := testKubelet.kubelet
fakeRuntime := testKubelet.fakeRuntime
fakeRuntime.PodList = []*containertest.FakePod{}
podName := "podFoo"
podNamespace := "nsFoo"
containerName := "containerFoo"
output, err := kubelet.RunInContainer(
kubecontainer.GetPodFullName(&v1.Pod{ObjectMeta: metav1.ObjectMeta{Name: podName, Namespace: podNamespace}}),
"",
containerName,
[]string{"ls"})
assert.Error(t, err)
assert.Nil(t, output, "output should be nil")
}
func TestRunInContainer(t *testing.T) {
for _, testError := range []error{nil, errors.New("bar")} {
testKubelet := newTestKubelet(t, false /* controllerAttachDetachEnabled */)
defer testKubelet.Cleanup()
kubelet := testKubelet.kubelet
fakeRuntime := testKubelet.fakeRuntime
fakeCommandRunner := containertest.FakeContainerCommandRunner{
Err: testError,
Stdout: "foo",
}
kubelet.runner = &fakeCommandRunner
containerID := kubecontainer.ContainerID{Type: "test", ID: "abc1234"}
fakeRuntime.PodList = []*containertest.FakePod{
{Pod: &kubecontainer.Pod{
ID: "12345678",
Name: "podFoo",
Namespace: "nsFoo",
Containers: []*kubecontainer.Container{
{Name: "containerFoo",
ID: containerID,
},
},
}},
}
cmd := []string{"ls"}
actualOutput, err := kubelet.RunInContainer("podFoo_nsFoo", "", "containerFoo", cmd)
assert.Equal(t, containerID, fakeCommandRunner.ContainerID, "(testError=%v) ID", testError)
assert.Equal(t, cmd, fakeCommandRunner.Cmd, "(testError=%v) command", testError)
// this isn't 100% foolproof as a bug in a real ContainerCommandRunner where it fails to copy to stdout/stderr wouldn't be caught by this test
assert.Equal(t, "foo", string(actualOutput), "(testError=%v) output", testError)
assert.Equal(t, err, testError, "(testError=%v) err", testError)
}
}
type testServiceLister struct {
services []*v1.Service
}
func (ls testServiceLister) List(labels.Selector) ([]*v1.Service, error) {
return ls.services, nil
}
type envs []kubecontainer.EnvVar
func (e envs) Len() int {
return len(e)
}
func (e envs) Swap(i, j int) { e[i], e[j] = e[j], e[i] }
func (e envs) Less(i, j int) bool { return e[i].Name < e[j].Name }
func buildService(name, namespace, clusterIP, protocol string, port int) *v1.Service {
return &v1.Service{
ObjectMeta: metav1.ObjectMeta{Name: name, Namespace: namespace},
Spec: v1.ServiceSpec{
Ports: []v1.ServicePort{{
Protocol: v1.Protocol(protocol),
Port: int32(port),
}},
ClusterIP: clusterIP,
},
}
}
func TestMakeEnvironmentVariables(t *testing.T) {
trueVal := true
services := []*v1.Service{
buildService("kubernetes", metav1.NamespaceDefault, "1.2.3.1", "TCP", 8081),
buildService("test", "test1", "1.2.3.3", "TCP", 8083),
buildService("kubernetes", "test2", "1.2.3.4", "TCP", 8084),
buildService("test", "test2", "1.2.3.5", "TCP", 8085),
buildService("test", "test2", "None", "TCP", 8085),
buildService("test", "test2", "", "TCP", 8085),
buildService("kubernetes", "kubernetes", "1.2.3.6", "TCP", 8086),
buildService("not-special", "kubernetes", "1.2.3.8", "TCP", 8088),
buildService("not-special", "kubernetes", "None", "TCP", 8088),
buildService("not-special", "kubernetes", "", "TCP", 8088),
}
testCases := []struct {
name string // the name of the test case
ns string // the namespace to generate environment for
container *v1.Container // the container to use
masterServiceNs string // the namespace to read master service info from
nilLister bool // whether the lister should be nil
configMap *v1.ConfigMap // an optional ConfigMap to pull from
secret *v1.Secret // an optional Secret to pull from
expectedEnvs []kubecontainer.EnvVar // a set of expected environment vars
expectedError bool // does the test fail
expectedEvent string // does the test emit an event
}{
{
name: "api server = Y, kubelet = Y",
ns: "test1",
container: &v1.Container{
Env: []v1.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"},
},
},
masterServiceNs: metav1.NamespaceDefault,
nilLister: false,
expectedEnvs: []kubecontainer.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"},
{Name: "KUBERNETES_SERVICE_PORT", Value: "8081"},
{Name: "KUBERNETES_SERVICE_HOST", Value: "1.2.3.1"},
{Name: "KUBERNETES_PORT", Value: "tcp://1.2.3.1:8081"},
{Name: "KUBERNETES_PORT_8081_TCP", Value: "tcp://1.2.3.1:8081"},
{Name: "KUBERNETES_PORT_8081_TCP_PROTO", Value: "tcp"},
{Name: "KUBERNETES_PORT_8081_TCP_PORT", Value: "8081"},
{Name: "KUBERNETES_PORT_8081_TCP_ADDR", Value: "1.2.3.1"},
},
},
{
name: "api server = Y, kubelet = N",
ns: "test1",
container: &v1.Container{
Env: []v1.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"},
},
},
masterServiceNs: metav1.NamespaceDefault,
nilLister: true,
expectedEnvs: []kubecontainer.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"},
},
},
{
name: "api server = N; kubelet = Y",
ns: "test1",
container: &v1.Container{
Env: []v1.EnvVar{
{Name: "FOO", Value: "BAZ"},
},
},
masterServiceNs: metav1.NamespaceDefault,
nilLister: false,
expectedEnvs: []kubecontainer.EnvVar{
{Name: "FOO", Value: "BAZ"},
{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"},
{Name: "KUBERNETES_SERVICE_HOST", Value: "1.2.3.1"},
{Name: "KUBERNETES_SERVICE_PORT", Value: "8081"},
{Name: "KUBERNETES_PORT", Value: "tcp://1.2.3.1:8081"},
{Name: "KUBERNETES_PORT_8081_TCP", Value: "tcp://1.2.3.1:8081"},
{Name: "KUBERNETES_PORT_8081_TCP_PROTO", Value: "tcp"},
{Name: "KUBERNETES_PORT_8081_TCP_PORT", Value: "8081"},
{Name: "KUBERNETES_PORT_8081_TCP_ADDR", Value: "1.2.3.1"},
},
},
{
name: "master service in pod ns",
ns: "test2",
container: &v1.Container{
Env: []v1.EnvVar{
{Name: "FOO", Value: "ZAP"},
},
},
masterServiceNs: "kubernetes",
nilLister: false,
expectedEnvs: []kubecontainer.EnvVar{
{Name: "FOO", Value: "ZAP"},
{Name: "TEST_SERVICE_HOST", Value: "1.2.3.5"},
{Name: "TEST_SERVICE_PORT", Value: "8085"},
{Name: "TEST_PORT", Value: "tcp://1.2.3.5:8085"},
{Name: "TEST_PORT_8085_TCP", Value: "tcp://1.2.3.5:8085"},
{Name: "TEST_PORT_8085_TCP_PROTO", Value: "tcp"},
{Name: "TEST_PORT_8085_TCP_PORT", Value: "8085"},
{Name: "TEST_PORT_8085_TCP_ADDR", Value: "1.2.3.5"},