pattern.py 文件源码

def pattern_matching_domains_in_libvirt(pattern, conn):
    """
    Parse the host pattern as written in the config and find matching hosts

    :param pattern: pattern to match on one or several domain names
    :param conn: connection with libvirt
    """
    exclude, pattern = _handle_possible_exclusion_host_pattern(pattern)
    if pattern.startswith("r:"):
        pattern = pattern[2:]
        domains = search_domains_regex(pattern, conn)
    elif pattern.startswith("g:"):
        domains = _include_group_domains(pattern)
    else:
        try:
            # will raise libvirt.libvirtError if the domain is not found
            conn.lookupByName(pattern)
            domains = (pattern,)
        except libvirt.libvirtError as e:
            logger.error(e)
            domains = tuple()

    return {"domains": domains, "exclude": exclude}