Remove dependency on kubelet related flags.

test/e2e/framework/test_context.go

@@ -23,6 +23,7 @@ import (
 
 	"github.com/onsi/ginkgo/config"
 	"github.com/spf13/viper"
+	"k8s.io/kubernetes/pkg/apis/componentconfig"
 	"k8s.io/kubernetes/pkg/client/unversioned/clientcmd"
 	"k8s.io/kubernetes/pkg/cloudprovider"
 )
@@ -125,6 +126,9 @@ type NodeTestContextType struct {
 	ContainerRuntimeEndpoint string
 	// MounterPath is the path to the program to run to perform a mount
 	MounterPath string
+	// KubeletConfig is the kubelet configuration the test is running against.
+	// TODO(random-liu): Remove kubelet configuration related fields above after removing kubelet start logic out.
+	KubeletConfig componentconfig.KubeletConfiguration
 }
 
 type CloudConfig struct {

test/e2e_node/cgroup_manager_test.go

@@ -54,7 +54,7 @@ func makePodToVerifyCgroups(cgroupNames []cm.CgroupName) *api.Pod {
 	// convert the names to their literal cgroupfs forms...
 	cgroupFsNames := []string{}
 	for _, cgroupName := range cgroupNames {
-		if framework.TestContext.CgroupDriver == "systemd" {
+		if framework.TestContext.KubeletConfig.CgroupDriver == "systemd" {
 			cgroupFsNames = append(cgroupFsNames, cm.ConvertCgroupNameToSystemd(cgroupName, true))
 		} else {
 			cgroupFsNames = append(cgroupFsNames, string(cgroupName))
@@ -103,7 +103,7 @@ func makePodToVerifyCgroups(cgroupNames []cm.CgroupName) *api.Pod {
 // makePodToVerifyCgroupRemoved verfies the specified cgroup does not exist.
 func makePodToVerifyCgroupRemoved(cgroupName cm.CgroupName) *api.Pod {
 	cgroupFsName := string(cgroupName)
-	if framework.TestContext.CgroupDriver == "systemd" {
+	if framework.TestContext.KubeletConfig.CgroupDriver == "systemd" {
 		cgroupFsName = cm.ConvertCgroupNameToSystemd(cm.CgroupName(cgroupName), true)
 	}
 	pod := &api.Pod{
@@ -143,7 +143,7 @@ var _ = framework.KubeDescribe("Kubelet Cgroup Manager", func() {
 	Describe("QOS containers", func() {
 		Context("On enabling QOS cgroup hierarchy", func() {
 			It("Top level QoS containers should have been created", func() {
-				if !framework.TestContext.CgroupsPerQOS {
+				if !framework.TestContext.KubeletConfig.ExperimentalCgroupsPerQOS {
 					return
 				}
 				cgroupsToVerify := []cm.CgroupName{cm.CgroupName(qos.Burstable), cm.CgroupName(qos.BestEffort)}
@@ -158,7 +158,7 @@ var _ = framework.KubeDescribe("Kubelet Cgroup Manager", func() {
 	Describe("Pod containers", func() {
 		Context("On scheduling a Guaranteed Pod", func() {
 			It("Pod containers should have been created under the cgroup-root", func() {
-				if !framework.TestContext.CgroupsPerQOS {
+				if !framework.TestContext.KubeletConfig.ExperimentalCgroupsPerQOS {
 					return
 				}
 				var (
@@ -202,7 +202,7 @@ var _ = framework.KubeDescribe("Kubelet Cgroup Manager", func() {
 		})
 		Context("On scheduling a BestEffort Pod", func() {
 			It("Pod containers should have been created under the BestEffort cgroup", func() {
-				if !framework.TestContext.CgroupsPerQOS {
+				if !framework.TestContext.KubeletConfig.ExperimentalCgroupsPerQOS {
 					return
 				}
 				var (
@@ -246,7 +246,7 @@ var _ = framework.KubeDescribe("Kubelet Cgroup Manager", func() {
 		})
 		Context("On scheduling a Burstable Pod", func() {
 			It("Pod containers should have been created under the Burstable cgroup", func() {
-				if !framework.TestContext.CgroupsPerQOS {
+				if !framework.TestContext.KubeletConfig.ExperimentalCgroupsPerQOS {
 					return
 				}
 				var (

test/e2e_node/disk_eviction_test.go

@@ -223,7 +223,7 @@ func nodeHasDiskPressure(cs clientset.Interface) bool {
 }
 
 func evictionOptionIsSet() bool {
-	return len(framework.TestContext.EvictionHard) > 0
+	return len(framework.TestContext.KubeletConfig.EvictionHard) > 0
 }
 
 // TODO(random-liu): Use OSImage in node status to do the check.

test/e2e_node/e2e_node_suite_test.go

@@ -20,7 +20,6 @@ package e2e_node
 
 import (
 	"bytes"
-	"encoding/json"
 	"flag"
 	"fmt"
 	"io/ioutil"
@@ -151,15 +150,8 @@ var _ = SynchronizedBeforeSuite(func() []byte {
 	// Reference common test to make the import valid.
 	commontest.CurrentSuite = commontest.NodeE2E
 
-	data, err := json.Marshal(&framework.TestContext.NodeTestContextType)
-	Expect(err).NotTo(HaveOccurred(), "should be able to serialize node test context.")
-
-	return data
-}, func(data []byte) {
-	// The node test context is updated in the first function, update it on every test node.
-	err := json.Unmarshal(data, &framework.TestContext.NodeTestContextType)
-	Expect(err).NotTo(HaveOccurred(), "should be able to deserialize node test context.")
-
+	return nil
+}, func([]byte) {
 	// update test context with node configuration.
 	Expect(updateTestContext()).To(Succeed(), "update test context with node config.")
 })
@@ -235,12 +227,20 @@ func updateTestContext() error {
 	if err != nil {
 		return fmt.Errorf("failed to get apiserver client: %v", err)
 	}
+	// Update test context with current node object.
 	node, err := getNode(client)
 	if err != nil {
 		return fmt.Errorf("failed to get node: %v", err)
 	}
-	// Initialize the node name
-	framework.TestContext.NodeName = node.Name
+	framework.TestContext.NodeName = node.Name // Set node name.
+	// Update test context with current kubelet configuration.
+	// This assumes all tests which dynamically change kubelet configuration
+	// must: 1) run in serial; 2) restore kubelet configuration after test.
+	kubeletCfg, err := getCurrentKubeletConfig()
+	if err != nil {
+		return fmt.Errorf("failed to get kubelet configuration: %v", err)
+	}
+	framework.TestContext.KubeletConfig = *kubeletCfg // Set kubelet config.
 	return nil
 }
 

test/e2e_node/mirror_pod_test.go

@@ -37,14 +37,16 @@ import (
 var _ = framework.KubeDescribe("MirrorPod", func() {
 	f := framework.NewDefaultFramework("mirror-pod")
 	Context("when create a mirror pod ", func() {
-		var ns, staticPodName, mirrorPodName string
+		var ns, manifestPath, staticPodName, mirrorPodName string
 		BeforeEach(func() {
 			ns = f.Namespace.Name
 			staticPodName = "static-pod-" + string(uuid.NewUUID())
 			mirrorPodName = staticPodName + "-" + framework.TestContext.NodeName
 
+			manifestPath = framework.TestContext.KubeletConfig.PodManifestPath
+
 			By("create the static pod")
-			err := createStaticPod(framework.TestContext.ManifestPath, staticPodName, ns,
+			err := createStaticPod(manifestPath, staticPodName, ns,
 				"gcr.io/google_containers/nginx-slim:0.7", api.RestartPolicyAlways)
 			Expect(err).ShouldNot(HaveOccurred())
 
@@ -61,7 +63,7 @@ var _ = framework.KubeDescribe("MirrorPod", func() {
 
 			By("update the static pod container image")
 			image := framework.GetPauseImageNameForHostArch()
-			err = createStaticPod(framework.TestContext.ManifestPath, staticPodName, ns, image, api.RestartPolicyAlways)
+			err = createStaticPod(manifestPath, staticPodName, ns, image, api.RestartPolicyAlways)
 			Expect(err).ShouldNot(HaveOccurred())
 
 			By("wait for the mirror pod to be updated")
@@ -107,7 +109,7 @@ var _ = framework.KubeDescribe("MirrorPod", func() {
 		})
 		AfterEach(func() {
 			By("delete the static pod")
-			err := deleteStaticPod(framework.TestContext.ManifestPath, staticPodName, ns)
+			err := deleteStaticPod(manifestPath, staticPodName, ns)
 			Expect(err).ShouldNot(HaveOccurred())
 
 			By("wait for the mirror pod to disappear")

test/e2e_node/services/services.go

@@ -209,7 +209,6 @@ func (e *E2EServices) startKubelet() (*server, error) {
 		"--eviction-pressure-transition-period", "30s",
 		"--feature-gates", framework.TestContext.FeatureGates,
 		"--v", LOG_VERBOSITY_LEVEL, "--logtostderr",
-
 		"--experimental-mounter-path", framework.TestContext.MounterPath,
 	)
 	if framework.TestContext.NodeName != "" { // If node name is specified, set hostname override.