+ @staticmethod
+ def get_docker_mergeddir(node, uuid):
+ """Get Docker overlay for MergedDir diff.
+
+ :param node: DUT node.
+ :param uuid: Docker UUID.
+ :type node: dict
+ :type uuid: str
+ :returns: Docker container MergedDir.
+ :rtype: str
+ :raises RuntimeError: If getting output failed.
+ """
+ command = "docker inspect --format='"\
+ "{{{{.GraphDriver.Data.MergedDir}}}}' {uuid}".format(uuid=uuid)
+ message = 'Failed to get directory of {uuid} on host {host}'.\
+ format(uuid=uuid, host=node['host'])
+
+ stdout, _ = exec_cmd_no_error(node, command, sudo=True, message=message)
+ return stdout.strip()
+