rd.py 文件源码

def contain(command, image_name, image_dir, container_id, container_dir,
            cpu_shares):
    # TODO: insert the container to a new cpu cgroup named:
    #       'rubber_docker/container_id'

    # TODO: if (cpu_shares != 0)  => set the 'cpu.shares' in our cpu cgroup

    linux.sethostname(container_id)  # change hostname to container_id

    linux.mount(None, '/', None, linux.MS_PRIVATE | linux.MS_REC, None)

    new_root = create_container_root(
        image_name, image_dir, container_id, container_dir)
    print('Created a new root fs for our container: {}'.format(new_root))

    _create_mounts(new_root)

    old_root = os.path.join(new_root, 'old_root')
    os.makedirs(old_root)
    linux.pivot_root(new_root, old_root)

    os.chdir('/')

    linux.umount2('/old_root', linux.MNT_DETACH)  # umount old root
    os.rmdir('/old_root') # rmdir the old_root dir

    os.execvp(command[0], command)