correction on rbd volume object and defaults

Signed-off-by: Huamin Chen <hchen@redhat.com>

pkg/api/testing/fuzzer.go

@@ -333,6 +333,20 @@ func FuzzerFor(t *testing.T, version unversioned.GroupVersion, src rand.Source)
 			c.FuzzNoCustom(s) // fuzz self without calling this function again
 			s.Type = api.SecretTypeOpaque
 		},
+		func(r *api.RBDVolumeSource, c fuzz.Continue) {
+			r.RBDPool = c.RandString()
+			if r.RBDPool == "" {
+				r.RBDPool = "rbd"
+			}
+			r.RadosUser = c.RandString()
+			if r.RadosUser == "" {
+				r.RadosUser = "admin"
+			}
+			r.Keyring = c.RandString()
+			if r.Keyring == "" {
+				r.Keyring = "/etc/ceph/keyring"
+			}
+		},
 		func(pv *api.PersistentVolume, c fuzz.Continue) {
 			c.FuzzNoCustom(pv) // fuzz self without calling this function again
 			types := []api.PersistentVolumePhase{api.VolumeAvailable, api.VolumePending, api.VolumeBound, api.VolumeReleased, api.VolumeFailed}