func verifyPDContentsViaContainer(f *framework.Framework, podName, containerName string, fileAndContentToVerify map[string]string) {
for filePath, expectedContents := range fileAndContentToVerify {
var value string
// Add a retry to avoid temporal failure in reading the content
for i := 0; i < maxReadRetry; i++ {
v, err := f.ReadFileViaContainer(podName, containerName, filePath)
value = v
if err != nil {
framework.Logf("Error reading file: %v", err)
}
framework.ExpectNoError(err)
framework.Logf("Read file %q with content: %v (iteration %d)", filePath, v, i)
if strings.TrimSpace(v) != strings.TrimSpace(expectedContents) {
framework.Logf("Warning: read content <%q> does not match execpted content <%q>.", v, expectedContents)
size, err := f.CheckFileSizeViaContainer(podName, containerName, filePath)
if err != nil {
framework.Logf("Error checking file size: %v", err)
}
framework.Logf("Check file %q size: %q", filePath, size)
} else {
break
}
}
Expect(strings.TrimSpace(value)).To(Equal(strings.TrimSpace(expectedContents)))
}
}
func verifyPDContentsViaContainer(f *framework.Framework, podName, containerName string, fileAndContentToVerify map[string]string) {
for filePath, expectedContents := range fileAndContentToVerify {
v, err := f.ReadFileViaContainer(podName, containerName, filePath)
if err != nil {
framework.Logf("Error reading file: %v", err)
}
framework.ExpectNoError(err)
framework.Logf("Read file %q with content: %v", filePath, v)
Expect(strings.TrimSpace(v)).To(Equal(strings.TrimSpace(expectedContents)))
}
}
func testPodSELinuxLabeling(f *framework.Framework, hostIPC bool, hostPID bool) {
// Write and read a file with an empty_dir volume
// with a pod with the MCS label s0:c0,c1
pod := scTestPod(hostIPC, hostPID)
volumeName := "test-volume"
mountPath := "/mounted_volume"
pod.Spec.Containers[0].VolumeMounts = []api.VolumeMount{
{
Name: volumeName,
MountPath: mountPath,
},
}
pod.Spec.Volumes = []api.Volume{
{
Name: volumeName,
VolumeSource: api.VolumeSource{
EmptyDir: &api.EmptyDirVolumeSource{
Medium: api.StorageMediumDefault,
},
},
},
}
pod.Spec.SecurityContext.SELinuxOptions = &api.SELinuxOptions{
Level: "s0:c0,c1",
}
pod.Spec.Containers[0].Command = []string{"sleep", "6000"}
client := f.ClientSet.Core().Pods(f.Namespace.Name)
pod, err := client.Create(pod)
framework.ExpectNoError(err, "Error creating pod %v", pod)
framework.ExpectNoError(framework.WaitForPodRunningInNamespace(f.ClientSet, pod))
testContent := "hello"
testFilePath := mountPath + "/TEST"
err = f.WriteFileViaContainer(pod.Name, pod.Spec.Containers[0].Name, testFilePath, testContent)
Expect(err).To(BeNil())
content, err := f.ReadFileViaContainer(pod.Name, pod.Spec.Containers[0].Name, testFilePath)
Expect(err).To(BeNil())
Expect(content).To(ContainSubstring(testContent))
foundPod, err := f.ClientSet.Core().Pods(f.Namespace.Name).Get(pod.Name)
Expect(err).NotTo(HaveOccurred())
// Confirm that the file can be accessed from a second
// pod using host_path with the same MCS label
volumeHostPath := fmt.Sprintf("%s/pods/%s/volumes/kubernetes.io~empty-dir/%s", framework.TestContext.KubeVolumeDir, foundPod.UID, volumeName)
By(fmt.Sprintf("confirming a container with the same label can read the file under --volume-dir=%s", framework.TestContext.KubeVolumeDir))
pod = scTestPod(hostIPC, hostPID)
pod.Spec.NodeName = foundPod.Spec.NodeName
volumeMounts := []api.VolumeMount{
{
Name: volumeName,
MountPath: mountPath,
},
}
volumes := []api.Volume{
{
Name: volumeName,
VolumeSource: api.VolumeSource{
HostPath: &api.HostPathVolumeSource{
Path: volumeHostPath,
},
},
},
}
pod.Spec.Containers[0].VolumeMounts = volumeMounts
pod.Spec.Volumes = volumes
pod.Spec.Containers[0].Command = []string{"cat", testFilePath}
pod.Spec.SecurityContext.SELinuxOptions = &api.SELinuxOptions{
Level: "s0:c0,c1",
}
f.TestContainerOutput("Pod with same MCS label reading test file", pod, 0, []string{testContent})
// Confirm that the same pod with a different MCS
// label cannot access the volume
pod = scTestPod(hostIPC, hostPID)
pod.Spec.Volumes = volumes
pod.Spec.Containers[0].VolumeMounts = volumeMounts
pod.Spec.Containers[0].Command = []string{"sleep", "6000"}
pod.Spec.SecurityContext.SELinuxOptions = &api.SELinuxOptions{
Level: "s0:c2,c3",
}
_, err = client.Create(pod)
framework.ExpectNoError(err, "Error creating pod %v", pod)
err = f.WaitForPodRunning(pod.Name)
framework.ExpectNoError(err, "Error waiting for pod to run %v", pod)
content, err = f.ReadFileViaContainer(pod.Name, "test-container", testFilePath)
Expect(content).NotTo(ContainSubstring(testContent))
}