firewall.py 文件源码

def __init__(self, host, **kwargs):
        """Create an NWFilter firewall driver

        :param host: nova.virt.libvirt.host.Host instance
        :param kwargs: currently unused
        """

        global libvirt
        if libvirt is None:
            try:
                libvirt = importutils.import_module('libvirt')
            except ImportError:
                LOG.warning(_LW("Libvirt module could not be loaded. "
                             "NWFilterFirewall will not work correctly."))
        self._host = host
        self.static_filters_configured = False
        self.handle_security_groups = False