Merge pull request #62206 from yujuhong/rm-rkt-refs

Automatic merge from submit-queue (batch tested with PRs 62192, 61866, 62206, 62360). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Remove rkt references in the codebase

```release-note
None
```

build/root/Makefile

@@ -251,7 +251,7 @@ define TEST_E2E_NODE_HELP_INFO
 #  GUBERNATOR: For REMOTE=true only. Produce link to Gubernator to view logs.
 #	 Defaults to false.
 #  PARALLELISM: The number of gingko nodes to run.  Defaults to 8.
-#  RUNTIME: Container runtime to use (eg. docker, rkt, remote).
+#  RUNTIME: Container runtime to use (eg. docker, remote).
 #    Defaults to "docker".
 #  CONTAINER_RUNTIME_ENDPOINT: remote container endpoint to connect to.
 #   Used when RUNTIME is set to "remote".

pkg/kubelet/apis/stats/v1alpha1/types.go

@@ -83,7 +83,7 @@ type RuntimeStats struct {
 const (
 	// SystemContainerKubelet is the container name for the system container tracking Kubelet usage.
 	SystemContainerKubelet = "kubelet"
-	// SystemContainerRuntime is the container name for the system container tracking the runtime (e.g. docker or rkt) usage.
+	// SystemContainerRuntime is the container name for the system container tracking the runtime (e.g. docker) usage.
 	SystemContainerRuntime = "runtime"
 	// SystemContainerMisc is the container name for the system container tracking non-kubernetes processes.
 	SystemContainerMisc = "misc"

pkg/kubelet/container/runtime.go

@@ -198,7 +198,7 @@ type PodPair struct {
 
 // ContainerID is a type that identifies a container.
 type ContainerID struct {
-	// The type of the container runtime. e.g. 'docker', 'rkt'.
+	// The type of the container runtime. e.g. 'docker'.
 	Type string
 	// The identification of the container, this is comsumable by
 	// the underlying container runtime. (Note that the container

pkg/kubelet/kubelet_network.go

@@ -187,7 +187,7 @@ func (kl *Kubelet) updatePodCIDR(cidr string) {
 	}
 
 	// kubelet -> generic runtime -> runtime shim -> network plugin
-	// docker/rkt non-cri implementations have a passthrough UpdatePodCIDR
+	// docker/non-cri implementations have a passthrough UpdatePodCIDR
 	if err := kl.getRuntime().UpdatePodCIDR(cidr); err != nil {
 		glog.Errorf("Failed to update pod CIDR: %v", err)
 		return

test/e2e/common/init_container.go

@@ -43,8 +43,6 @@ var _ = framework.KubeDescribe("InitContainer", func() {
 	})
 
 	It("should invoke init containers on a RestartNever pod", func() {
-		framework.SkipIfContainerRuntimeIs("rkt") // #25988
-
 		By("creating the pod")
 		name := "pod-init-" + string(uuid.NewUUID())
 		value := strconv.Itoa(time.Now().Nanosecond())
@@ -102,8 +100,6 @@ var _ = framework.KubeDescribe("InitContainer", func() {
 	})
 
 	It("should invoke init containers on a RestartAlways pod", func() {
-		framework.SkipIfContainerRuntimeIs("rkt") // #25988
-
 		By("creating the pod")
 		name := "pod-init-" + string(uuid.NewUUID())
 		value := strconv.Itoa(time.Now().Nanosecond())
@@ -165,8 +161,6 @@ var _ = framework.KubeDescribe("InitContainer", func() {
 	})
 
 	It("should not start app containers if init containers fail on a RestartAlways pod", func() {
-		framework.SkipIfContainerRuntimeIs("rkt") // #25988
-
 		By("creating the pod")
 		name := "pod-init-" + string(uuid.NewUUID())
 		value := strconv.Itoa(time.Now().Nanosecond())
@@ -275,8 +269,6 @@ var _ = framework.KubeDescribe("InitContainer", func() {
 	})
 
 	It("should not start app containers and fail the pod if init containers fail on a RestartNever pod", func() {
-		framework.SkipIfContainerRuntimeIs("rkt") // #25988
-
 		By("creating the pod")
 		name := "pod-init-" + string(uuid.NewUUID())
 		value := strconv.Itoa(time.Now().Nanosecond())

test/e2e/framework/test_context.go

@@ -209,7 +209,7 @@ func RegisterCommonFlags() {
 	flag.StringVar(&TestContext.ReportDir, "report-dir", "", "Path to the directory where the JUnit XML reports should be saved. Default is empty, which doesn't generate these reports.")
 	flag.Var(utilflag.NewMapStringBool(&TestContext.FeatureGates), "feature-gates", "A set of key=value pairs that describe feature gates for alpha/experimental features.")
 	flag.StringVar(&TestContext.Viper, "viper-config", "e2e", "The name of the viper config i.e. 'e2e' will read values from 'e2e.json' locally.  All e2e parameters are meant to be configurable by viper.")
-	flag.StringVar(&TestContext.ContainerRuntime, "container-runtime", "docker", "The container runtime of cluster VM instances (docker/rkt/remote).")
+	flag.StringVar(&TestContext.ContainerRuntime, "container-runtime", "docker", "The container runtime of cluster VM instances (docker/remote).")
 	flag.StringVar(&TestContext.ContainerRuntimeEndpoint, "container-runtime-endpoint", "unix:///var/run/dockershim.sock", "The container runtime endpoint of cluster VM instances.")
 	flag.StringVar(&TestContext.ContainerRuntimeProcessName, "container-runtime-process-name", "dockerd", "The name of the container runtime process.")
 	flag.StringVar(&TestContext.ContainerRuntimePidFile, "container-runtime-pid-file", "/var/run/docker.pid", "The pid file of the container runtime.")
@@ -277,7 +277,7 @@ func RegisterNodeFlags() {
 	flag.StringVar(&TestContext.NodeName, "node-name", "", "Name of the node to run tests on.")
 	// TODO(random-liu): Move kubelet start logic out of the test.
 	// TODO(random-liu): Move log fetch logic out of the test.
-	// There are different ways to start kubelet (systemd, initd, docker, rkt, manually started etc.)
+	// There are different ways to start kubelet (systemd, initd, docker, manually started etc.)
 	// and manage logs (journald, upstart etc.).
 	// For different situation we need to mount different things into the container, run different commands.
 	// It is hard and unnecessary to deal with the complexity inside the test suite.

test/e2e/kubectl/kubectl.go

@@ -505,8 +505,6 @@ var _ = SIGDescribe("Kubectl client", func() {
 		})
 
 		It("should support inline execution and attach", func() {
-			framework.SkipIfContainerRuntimeIs("rkt") // #23335
-
 			nsFlag := fmt.Sprintf("--namespace=%v", ns)
 
 			By("executing a command with run and attach with stdin")
@@ -1537,9 +1535,6 @@ metadata:
 		framework.ConformanceIt("should create a job from an image, then delete the job ", func() {
 			nsFlag := fmt.Sprintf("--namespace=%v", ns)
 
-			// The rkt runtime doesn't support attach, see #23335
-			framework.SkipIfContainerRuntimeIs("rkt")
-
 			By("executing a command with run --rm and attach with stdin")
 			t := time.NewTimer(runJobTimeout)
 			defer t.Stop()

test/e2e_node/cpu_manager_test.go

@@ -152,9 +152,6 @@ func setOldKubeletConfig(f *framework.Framework, oldCfg *kubeletconfig.KubeletCo
 }
 
 func enableCPUManagerInKubelet(f *framework.Framework) (oldCfg *kubeletconfig.KubeletConfiguration) {
-	// Run only if the container runtime is not docker or remote (not rkt).
-	framework.RunIfContainerRuntimeIs("docker", "remote")
-
 	// Enable CPU Manager in Kubelet with static policy.
 	oldCfg, err := getCurrentKubeletConfig()
 	framework.ExpectNoError(err)

test/test_owners.csv

@@ -663,7 +663,6 @@ k8s.io/kubernetes/pkg/kubelet/pod,alex-mohr,1,
 k8s.io/kubernetes/pkg/kubelet/prober,alex-mohr,1,
 k8s.io/kubernetes/pkg/kubelet/prober/results,krousey,1,
 k8s.io/kubernetes/pkg/kubelet/qos,vishh,0,
-k8s.io/kubernetes/pkg/kubelet/rkt,apelisse,1,
 k8s.io/kubernetes/pkg/kubelet/secret,kevin-wangzefeng,1,
 k8s.io/kubernetes/pkg/kubelet/server,tallclair,0,
 k8s.io/kubernetes/pkg/kubelet/server/portforward,rkouj,0,