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tests: add e2e tests for userns
Co-authored-by: Rodrigo Campos <rodrigoca@microsoft.com> Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com> Signed-off-by: Rodrigo Campos <rodrigoca@microsoft.com>
This commit is contained in:
Giuseppe Scrivano
Rodrigo Campos
parent
138e80819e
commit
b1eaf6a2d9
@ -17,6 +17,7 @@ limitations under the License.
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package node
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import (
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"context"
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"fmt"
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"strings"
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"time"
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@ -49,6 +50,261 @@ var _ = SIGDescribe("Security Context", func() {
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podClient = f.PodClient()
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})
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ginkgo.Context("When creating a pod with HostUsers", func() {
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containerName := "userns-test"
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makePod := func(hostUsers bool) *v1.Pod {
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return &v1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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Name: "userns-" + string(uuid.NewUUID()),
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},
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Spec: v1.PodSpec{
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Containers: []v1.Container{
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{
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Name: containerName,
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Image: imageutils.GetE2EImage(imageutils.BusyBox),
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Command: []string{"cat", "/proc/self/uid_map"},
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},
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},
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RestartPolicy: v1.RestartPolicyNever,
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HostUsers: &hostUsers,
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},
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}
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}
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ginkgo.It("must create the user namespace if set to false [LinuxOnly] [Feature:UserNamespacesStatelessPodsSupport]", func() {
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// with hostUsers=false the pod must use a new user namespace
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podClient := f.PodClientNS(f.Namespace.Name)
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createdPod1 := podClient.Create(makePod(false))
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createdPod2 := podClient.Create(makePod(false))
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defer func() {
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ginkgo.By("delete the pods")
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podClient.DeleteSync(createdPod1.Name, metav1.DeleteOptions{}, framework.DefaultPodDeletionTimeout)
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podClient.DeleteSync(createdPod2.Name, metav1.DeleteOptions{}, framework.DefaultPodDeletionTimeout)
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}()
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getLogs := func(pod *v1.Pod) (string, error) {
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err := e2epod.WaitForPodSuccessInNamespaceTimeout(f.ClientSet, createdPod1.Name, f.Namespace.Name, f.Timeouts.PodStart)
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if err != nil {
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return "", err
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}
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podStatus, err := podClient.Get(context.TODO(), pod.Name, metav1.GetOptions{})
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if err != nil {
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return "", err
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}
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return e2epod.GetPodLogs(f.ClientSet, f.Namespace.Name, podStatus.Name, containerName)
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}
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logs1, err := getLogs(createdPod1)
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framework.ExpectNoError(err)
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logs2, err := getLogs(createdPod2)
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framework.ExpectNoError(err)
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// 65536 is the size used for a user namespace. Verify that the value is present
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// in the /proc/self/uid_map file.
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if !strings.Contains(logs1, "65536") || !strings.Contains(logs2, "65536") {
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framework.Failf("user namespace not created")
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}
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if logs1 == logs2 {
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framework.Failf("two different pods are running with the same user namespace configuration")
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}
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})
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ginkgo.It("must not create the user namespace if set to true [LinuxOnly] [Feature:UserNamespacesStatelessPodsSupport]", func() {
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// with hostUsers=true the pod must use the host user namespace
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pod := makePod(true)
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// When running in the host's user namespace, the /proc/self/uid_map file content looks like:
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// 0 0 4294967295
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// Verify the value 4294967295 is present in the output.
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f.TestContainerOutput("read namespace", pod, 0, []string{
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"4294967295",
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})
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})
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ginkgo.It("should mount all volumes with proper permissions with hostUsers=false [LinuxOnly] [Feature:UserNamespacesStatelessPodsSupport]", func() {
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// Create all volume types supported: configmap, secret, downwardAPI, projected.
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// Create configmap.
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name := "userns-volumes-test-" + string(uuid.NewUUID())
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configMap := newConfigMap(f, name)
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ginkgo.By(fmt.Sprintf("Creating configMap %v/%v", f.Namespace.Name, configMap.Name))
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var err error
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if configMap, err = f.ClientSet.CoreV1().ConfigMaps(f.Namespace.Name).Create(context.TODO(), configMap, metav1.CreateOptions{}); err != nil {
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framework.Failf("unable to create test configMap %s: %v", configMap.Name, err)
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}
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// Create secret.
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secret := secretForTest(f.Namespace.Name, name)
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ginkgo.By(fmt.Sprintf("Creating secret with name %s", secret.Name))
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if secret, err = f.ClientSet.CoreV1().Secrets(f.Namespace.Name).Create(context.TODO(), secret, metav1.CreateOptions{}); err != nil {
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framework.Failf("unable to create test secret %s: %v", secret.Name, err)
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}
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// downwardAPI definition.
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downwardVolSource := &v1.DownwardAPIVolumeSource{
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Items: []v1.DownwardAPIVolumeFile{
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{
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Path: "name",
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FieldRef: &v1.ObjectFieldSelector{
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APIVersion: "v1",
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FieldPath: "metadata.name",
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},
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},
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},
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}
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// Create a pod with all the volumes
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falseVar := false
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pod := &v1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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Name: "pod-userns-volumes-" + string(uuid.NewUUID()),
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},
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Spec: v1.PodSpec{
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Containers: []v1.Container{
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{
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Name: "userns-file-permissions",
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Image: imageutils.GetE2EImage(imageutils.BusyBox),
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// Print (numeric) GID of the files in /vol/.
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// We limit to "type f" as kubelet uses symlinks to those files, but we
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// don't care about the owner of the symlink itself, just the files.
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Command: []string{"sh", "-c", "stat -c='%g' $(find /vol/ -type f)"},
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VolumeMounts: []v1.VolumeMount{
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{
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Name: "cfg",
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MountPath: "/vol/cfg/",
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},
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{
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Name: "secret",
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MountPath: "/vol/secret/",
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},
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{
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Name: "downward",
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MountPath: "/vol/downward/",
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},
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{
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Name: "projected",
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MountPath: "/vol/projected/",
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},
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},
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},
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},
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Volumes: []v1.Volume{
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{
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Name: "cfg",
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VolumeSource: v1.VolumeSource{
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ConfigMap: &v1.ConfigMapVolumeSource{
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LocalObjectReference: v1.LocalObjectReference{Name: configMap.Name},
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},
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},
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},
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{
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Name: "secret",
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VolumeSource: v1.VolumeSource{
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Secret: &v1.SecretVolumeSource{
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SecretName: secret.Name,
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},
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},
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},
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{
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Name: "downward",
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VolumeSource: v1.VolumeSource{
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DownwardAPI: downwardVolSource,
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},
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},
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{
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Name: "projected",
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VolumeSource: v1.VolumeSource{
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Projected: &v1.ProjectedVolumeSource{
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Sources: []v1.VolumeProjection{
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{
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DownwardAPI: &v1.DownwardAPIProjection{
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Items: downwardVolSource.Items,
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},
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},
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{
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Secret: &v1.SecretProjection{
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LocalObjectReference: v1.LocalObjectReference{Name: secret.Name},
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},
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},
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},
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},
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},
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},
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},
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HostUsers: &falseVar,
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RestartPolicy: v1.RestartPolicyNever,
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},
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}
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// Expect one line for each file on all the volumes.
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// Each line should be "=0" that means root inside the container is the owner of the file.
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downwardAPIVolFiles := 1
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projectedFiles := len(secret.Data) + downwardAPIVolFiles
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f.TestContainerOutput("check file permissions", pod, 0, []string{
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strings.Repeat("=0\n", len(secret.Data)+len(configMap.Data)+downwardAPIVolFiles+projectedFiles),
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})
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})
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ginkgo.It("should set FSGroup to user inside the container with hostUsers=false [LinuxOnly] [Feature:UserNamespacesStatelessPodsSupport]", func() {
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// Create configmap.
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name := "userns-volumes-test-" + string(uuid.NewUUID())
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configMap := newConfigMap(f, name)
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ginkgo.By(fmt.Sprintf("Creating configMap %v/%v", f.Namespace.Name, configMap.Name))
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var err error
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if configMap, err = f.ClientSet.CoreV1().ConfigMaps(f.Namespace.Name).Create(context.TODO(), configMap, metav1.CreateOptions{}); err != nil {
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framework.Failf("unable to create test configMap %s: %v", configMap.Name, err)
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}
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// Create a pod with hostUsers=false
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falseVar := false
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fsGroup := int64(200)
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pod := &v1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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Name: "pod-userns-fsgroup-" + string(uuid.NewUUID()),
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},
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Spec: v1.PodSpec{
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Containers: []v1.Container{
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{
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Name: "userns-fsgroup",
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Image: imageutils.GetE2EImage(imageutils.BusyBox),
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// Print (numeric) GID of the files in /vol/.
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// We limit to "type f" as kubelet uses symlinks to those files, but we
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// don't care about the owner of the symlink itself, just the files.
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Command: []string{"sh", "-c", "stat -c='%g' $(find /vol/ -type f)"},
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VolumeMounts: []v1.VolumeMount{
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{
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Name: "cfg",
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MountPath: "/vol/cfg/",
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},
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},
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},
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},
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Volumes: []v1.Volume{
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{
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Name: "cfg",
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VolumeSource: v1.VolumeSource{
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ConfigMap: &v1.ConfigMapVolumeSource{
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LocalObjectReference: v1.LocalObjectReference{Name: configMap.Name},
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},
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},
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},
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},
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HostUsers: &falseVar,
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RestartPolicy: v1.RestartPolicyNever,
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SecurityContext: &v1.PodSecurityContext{
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FSGroup: &fsGroup,
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},
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},
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}
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// Expect one line for each file on all the volumes.
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// Each line should be "=200" (fsGroup) that means it was mapped to the
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// right user inside the container.
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f.TestContainerOutput("check FSGroup is mapped correctly", pod, 0, []string{
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strings.Repeat(fmt.Sprintf("=%v\n", fsGroup), len(configMap.Data)),
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})
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})
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})
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ginkgo.Context("When creating a container with runAsUser", func() {
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makeUserPod := func(podName, image string, command []string, userid int64) *v1.Pod {
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return &v1.Pod{
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