mark density tests as flaky

test/e2e/framework/ginkgowrapper.go

@@ -526,6 +526,21 @@ func withLabel(label string) interface{} {
 	return newLabel(label)
 }
 
+// WithFlaky specifies that a certain test or group of tests are failing randomly.
+// These tests are usually filtered out and ran separately from other tests.
+func WithFlaky() interface{} {
+	return withFlaky()
+}
+
+// WithFlaky is a shorthand for the corresponding package function.
+func (f *Framework) WithFlaky() interface{} {
+	return withFlaky()
+}
+
+func withFlaky() interface{} {
+	return newLabel("Flaky")
+}
+
 type label struct {
 	// parts get concatenated with ":" to build the full label.
 	parts []string

test/e2e_node/density_test.go

@@ -76,7 +76,7 @@ var _ = SIGDescribe("Density", framework.WithSerial(), framework.WithSlow(), fun
 		rc = NewResourceCollector(containerStatsPollingPeriod)
 	})
 
-	ginkgo.Context("create a batch of pods", func() {
+	f.Context("create a batch of pods", framework.WithFlaky(), func() {
 		// TODO(coufon): the values are generous, set more precise limits with benchmark data
 		// and add more tests
 		dTests := []densityTest{
@@ -225,7 +225,7 @@ var _ = SIGDescribe("Density", framework.WithSerial(), framework.WithSlow(), fun
 		}
 	})
 
-	ginkgo.Context("create a sequence of pods", func() {
+	f.Context("create a sequence of pods", framework.WithFlaky(), func() {
 		dTests := []densityTest{
 			{
 				podsNr:   10,