Add some docs about the missing node e2e scheduling

docs/devel/e2e-node-tests.md

@@ -42,6 +42,8 @@ Node e2e tests are run as both pre- and post- submit tests by the Kubernetes pro
 
 *Note: Linux only. Mac and Windows unsupported.*
 
+*Note: There is no scheduler running. The e2e tests have to do manual scheduling, e.g. by using `framework.PodClient`.*
+
 # Running tests
 
 ## Locally

test/e2e/framework/pods.go

@@ -30,7 +30,9 @@ import (
 	. "github.com/onsi/gomega"
 )
 
-// Convenience method for getting a pod client interface in the framework's namespace.
+// Convenience method for getting a pod client interface in the framework's namespace,
+// possibly applying test-suite specific transformations to the pod spec, e.g. for
+// node e2e pod scheduling.
 func (f *Framework) PodClient() *PodClient {
 	return &PodClient{
 		f:            f,