e2e: add option to create pods with different image in pod.Config

For testing certain features, the BusyBox image does not provide all the
tools that are needed. Notably 'dd' from BusyBox does not support
direct-io that is required for skipping caches while doing writes and
reads on a Block-mode PVC attached to different nodes.

Author: nixpanic

test/e2e/framework/pod/create.go

@@ -48,6 +48,7 @@ type Config struct {
 	SeLinuxLabel        *v1.SELinuxOptions
 	FsGroup             *int64
 	NodeSelection       NodeSelection
+	ImageID             int
 }
 
 // CreateUnschedulablePod with given claims based on node selector
@@ -185,6 +186,10 @@ func MakeSecPod(podConfig *Config) (*v1.Pod, error) {
 			return &i
 		}(1000)
 	}
+	image := imageutils.BusyBox
+	if podConfig.ImageID != imageutils.None {
+		image = podConfig.ImageID
+	}
 	podSpec := &v1.Pod{
 		TypeMeta: metav1.TypeMeta{
 			Kind:       "Pod",
@@ -203,7 +208,7 @@ func MakeSecPod(podConfig *Config) (*v1.Pod, error) {
 			Containers: []v1.Container{
 				{
 					Name:    "write-pod",
-					Image:   imageutils.GetE2EImage(imageutils.BusyBox),
+					Image:   imageutils.GetE2EImage(image),
 					Command: []string{"/bin/sh"},
 					Args:    []string{"-c", podConfig.Command},
 					SecurityContext: &v1.SecurityContext{

test/utils/image/manifest.go

@@ -119,8 +119,10 @@ var (
 )
 
 const (
+	// None is to be used for unset/default images
+	None = iota
 	// Agnhost image
-	Agnhost = iota
+	Agnhost
 	// AgnhostPrivate image
 	AgnhostPrivate
 	// APIServer image