models.py 文件源码

def get_free_host(cls, as_int=None, node=None, ip=None):
        """Return free host if available.
        :param as_int: return ip as long int
        :param node: if set, get free host only for this node
        :param ip: if set, first try to check if this ip available, if not,
        then return any other available ip
        :return: ip address, as str or int, depends on  as_int value

        """
        if ip:
            network = cls.get_network_by_ip(ip)
            if network and network.is_ip_available(ip, node):
                return int(ipaddress.ip_address(ip)) if as_int else ip
        if node is None:
            networks = cls.all()
        else:
            networks = cls.filter(cls.node.has(hostname=node))
        for n in networks:
            free_host = n.get_first_free_host(as_int=as_int)
            if free_host is not None:
                return free_host
        raise NoFreeIPs()