CephMonitors: []string{"foo"},
						RBDImage:     "bar",
						FSType:       "ext4",
					},
				},
			},
		}, {
			name: "empty rbd monitors",
			vol: core.Volume{
				Name: "rbd",
				VolumeSource: core.VolumeSource{
					RBD: &core.RBDVolumeSource{
						CephMonitors: []string{},
						RBDImage:     "bar",
						FSType:       "ext4",
					},
				},
			},
			errs: []verr{{

        "properties": {
          "fsType": {