Returns a list of the IDs of layers belonging to the specified image, with
    the top-most layer (the one correspnding to the passed name) appearing
    last.

    name
        Image name or ID

    CLI Example:

    .. code-block:: bash

        salt myminion docker.layers centos:7

def layers(name):
    '''
    Returns a list of the IDs of layers belonging to the specified image, with
    the top-most layer (the one correspnding to the passed name) appearing
    last.

    name
        Image name or ID

    CLI Example:

    .. code-block:: bash

        salt myminion docker.layers centos:7
    '''
    ret = []
    cmd = ['docker', 'history', '-q', name]
    for line in reversed(
            __salt__['cmd.run_stdout'](cmd, python_shell=False).splitlines()):
        ret.append(line)
    if not ret:
        raise CommandExecutionError('Image \'{0}\' not found'.format(name))
    return ret