Downward API implementation for resources limits and requests

pkg/api/testing/fuzzer.go

@@ -243,6 +243,7 @@ func FuzzerFor(t *testing.T, version unversioned.GroupVersion, src rand.Source)
 		func(m *api.DownwardAPIVolumeFile, c fuzz.Continue) {
 			m.Path = c.RandString()
 			versions := []string{"v1"}
+			m.FieldRef = &api.ObjectFieldSelector{}
 			m.FieldRef.APIVersion = versions[c.Rand.Intn(len(versions))]
 			m.FieldRef.FieldPath = c.RandString()
 		},