def asok(cluster, hostname):
    """
    Example usage::

        >>> from ceph_deploy.util.paths import mon
        >>> mon.asok('mycluster', 'myhostname')
        /var/run/ceph/mycluster-mon.myhostname.asok
    """
    asok_file = '%s-mon.%s.asok' % (cluster, hostname)
    return join(constants.base_run_path, asok_file)