def commit_buildroot(self):
        """
        create image from buildroot

        :return:
        """
        logger.info("committing buildroot")
        self.ensure_is_built()

        commit_message = "docker build of '%s' (%s)" % (self.image, self.uri)
        self.buildroot_image_name = ImageName(
            repo="buildroot-%s" % self.image,
            # save the time when image was built
            tag=datetime.datetime.now().strftime('%Y-%m-%d-%H-%M-%S'))
        self.buildroot_image_id = self.dt.commit_container(self.build_container_id, commit_message)
        return self.buildroot_image_id
create image from buildroot

        :return: