tests: Replaces images used with agnhost (part 3)

Quite a few images are only used a few times in a few tests. Thus,
the images are being centralized into the agnhost image, reducing
the number of images that have to be pulled and used.

This PR replaces the usage of the following images with agnhost:

- audit-proxy
- crd-conversion-webhook
- entrypoint-tester
- inclusterclient
- iperf
- porter
- serve-hostname

test/e2e/common/docker_containers.go

@@ -17,10 +17,13 @@ limitations under the License.
 package common
 
 import (
+	"github.com/onsi/gomega"
+
 	"k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/util/uuid"
 	"k8s.io/kubernetes/test/e2e/framework"
+	e2epod "k8s.io/kubernetes/test/e2e/framework/pod"
 	imageutils "k8s.io/kubernetes/test/utils/image"
 )
 
@@ -33,9 +36,17 @@ var _ = framework.KubeDescribe("Docker Containers", func() {
 		Description: Default command and arguments from the docker image entrypoint MUST be used when Pod does not specify the container command
 	*/
 	framework.ConformanceIt("should use the image defaults if command and args are blank [NodeConformance]", func() {
-		f.TestContainerOutput("use defaults", entrypointTestPod(), 0, []string{
-			"[/ep default arguments]",
-		})
+		pod := f.PodClient().Create(entrypointTestPod())
+		err := e2epod.WaitForPodNameRunningInNamespace(f.ClientSet, pod.Name, f.Namespace.Name)
+		framework.ExpectNoError(err, "Expected pod %q to be running, got error: %v", pod.Name, err)
+
+		pollLogs := func() (string, error) {
+			return e2epod.GetPodLogs(f.ClientSet, f.Namespace.Name, pod.Name, containerName)
+		}
+
+		// The agnhost's image default entrypoint / args are: "/agnhost pause"
+		// which will print out "Paused".
+		gomega.Eventually(pollLogs, 3, framework.Poll).Should(gomega.ContainSubstring("Paused"))
 	})
 
 	/*
@@ -45,10 +56,10 @@ var _ = framework.KubeDescribe("Docker Containers", func() {
 	*/
 	framework.ConformanceIt("should be able to override the image's default arguments (docker cmd) [NodeConformance]", func() {
 		pod := entrypointTestPod()
-		pod.Spec.Containers[0].Args = []string{"override", "arguments"}
+		pod.Spec.Containers[0].Args = []string{"entrypoint-tester", "override", "arguments"}
 
 		f.TestContainerOutput("override arguments", pod, 0, []string{
-			"[/ep override arguments]",
+			"[/agnhost entrypoint-tester override arguments]",
 		})
 	})
 
@@ -61,10 +72,10 @@ var _ = framework.KubeDescribe("Docker Containers", func() {
 	*/
 	framework.ConformanceIt("should be able to override the image's default command (docker entrypoint) [NodeConformance]", func() {
 		pod := entrypointTestPod()
-		pod.Spec.Containers[0].Command = []string{"/ep-2"}
+		pod.Spec.Containers[0].Command = []string{"/agnhost-2", "entrypoint-tester"}
 
 		f.TestContainerOutput("override command", pod, 0, []string{
-			"[/ep-2]",
+			"[/agnhost-2 entrypoint-tester]",
 		})
 	})
 
@@ -75,11 +86,11 @@ var _ = framework.KubeDescribe("Docker Containers", func() {
 	*/
 	framework.ConformanceIt("should be able to override the image's default command and arguments [NodeConformance]", func() {
 		pod := entrypointTestPod()
-		pod.Spec.Containers[0].Command = []string{"/ep-2"}
-		pod.Spec.Containers[0].Args = []string{"override", "arguments"}
+		pod.Spec.Containers[0].Command = []string{"/agnhost-2"}
+		pod.Spec.Containers[0].Args = []string{"entrypoint-tester", "override", "arguments"}
 
 		f.TestContainerOutput("override all", pod, 0, []string{
-			"[/ep-2 override arguments]",
+			"[/agnhost-2 entrypoint-tester override arguments]",
 		})
 	})
 })
@@ -99,7 +110,7 @@ func entrypointTestPod() *v1.Pod {
 			Containers: []v1.Container{
 				{
 					Name:  testContainerName,
-					Image: imageutils.GetE2EImage(imageutils.EntrypointTester),
+					Image: imageutils.GetE2EImage(imageutils.Agnhost),
 				},
 			},
 			RestartPolicy:                 v1.RestartPolicyNever,

test/e2e/common/util.go

@@ -54,14 +54,11 @@ var CurrentSuite Suite
 // TODO(random-liu): Change the image puller pod to use similar mechanism.
 var CommonImageWhiteList = sets.NewString(
 	imageutils.GetE2EImage(imageutils.Agnhost),
-	imageutils.GetE2EImage(imageutils.AuditProxy),
 	imageutils.GetE2EImage(imageutils.BusyBox),
-	imageutils.GetE2EImage(imageutils.EntrypointTester),
 	imageutils.GetE2EImage(imageutils.IpcUtils),
 	imageutils.GetE2EImage(imageutils.Mounttest),
 	imageutils.GetE2EImage(imageutils.MounttestUser),
 	imageutils.GetE2EImage(imageutils.Nginx),
-	imageutils.GetE2EImage(imageutils.ServeHostname),
 	imageutils.GetE2EImage(imageutils.TestWebserver),
 	imageutils.GetE2EImage(imageutils.VolumeNFSServer),
 	imageutils.GetE2EImage(imageutils.VolumeGlusterServer),