private String lookupImageIdFromContainer(String containerId) {
   try {
     InspectContainerResponse containerInspectResponse =
         docker.inspectContainerCmd(containerId).exec();
     return containerInspectResponse.getImageId();
   } catch (DockerException e) {
     logger.error("Unable to inspect container " + containerId, e);
     throw new OrchestrationException(e);
   }
 }