ceph.py 文件源码

def monitor_key_exists(service, key):
    """
    Searches for the existence of a key in the monitor cluster.
    :param service: six.string_types. The Ceph user name to run the command under
    :param key: six.string_types.  The key to search for
    :return: Returns True if the key exists, False if not and raises an
     exception if an unknown error occurs. :raise: CalledProcessError if
     an unknown error occurs
    """
    try:
        check_call(
            ['ceph', '--id', service,
             'config-key', 'exists', str(key)])
        # I can return true here regardless because Ceph returns
        # ENOENT if the key wasn't found
        return True
    except CalledProcessError as e:
        if e.returncode == errno.ENOENT:
            return False
        else:
            log("Unknown error from ceph config-get exists: {} {}".format(
                e.returncode, e.output))
            raise