6bb1fd776f
All Python files, except executables, should have a '.py' extension. This wasn't being done for files in the 'plugins/xenserver' folder, likely because it seems unnatural to call a "plugin" with a file extension. Begin working towards a resolution for this by renaming all files to include a '.py' extension. To avoid forcing operators to upgrade the Nova service and per-host plugins at the same time, continue to reference the old, non-'.py' filenames, using symlinks to ensure the references continue to work. Once Ocata has been released, these symlinks can be removed, the API version updated and the reference updated to include the '.py' extension. Change-Id: Icf4cf2424c15276a6c01778fb92f76bbdc9b2068 Closes-bug: #1302831
57 lines
2.4 KiB
Python
57 lines
2.4 KiB
Python
# Copyright 2010 United States Government as represented by the
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# Administrator of the National Aeronautics and Space Administration.
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# All Rights Reserved.
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# Copyright (c) 2010 Citrix Systems, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from oslo_serialization import jsonutils
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from nova.virt import firewall
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class Dom0IptablesFirewallDriver(firewall.IptablesFirewallDriver):
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"""Dom0IptablesFirewallDriver class
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This class provides an implementation for nova.virt.Firewall
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using iptables. This class is meant to be used with the xenapi
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backend and uses xenapi plugin to enforce iptables rules in dom0.
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"""
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def _plugin_execute(self, *cmd, **kwargs):
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# Prepare arguments for plugin call
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args = {}
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args.update(map(lambda x: (x, str(kwargs[x])), kwargs))
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args['cmd_args'] = jsonutils.dumps(cmd)
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ret = self._session.call_plugin('xenhost.py', 'iptables_config', args)
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json_ret = jsonutils.loads(ret)
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return (json_ret['out'], json_ret['err'])
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def __init__(self, xenapi_session=None, **kwargs):
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from nova.network import linux_net
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super(Dom0IptablesFirewallDriver, self).__init__(**kwargs)
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self._session = xenapi_session
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# Create IpTablesManager with executor through plugin
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self.iptables = linux_net.IptablesManager(self._plugin_execute)
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self.iptables.ipv4['filter'].add_chain('sg-fallback')
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self.iptables.ipv4['filter'].add_rule('sg-fallback', '-j DROP')
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self.iptables.ipv6['filter'].add_chain('sg-fallback')
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self.iptables.ipv6['filter'].add_rule('sg-fallback', '-j DROP')
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def _build_tcp_udp_rule(self, rule, version):
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if rule.from_port == rule.to_port:
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return ['--dport', '%s' % (rule.from_port,)]
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else:
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# No multiport needed for XS!
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return ['--dport', '%s:%s' % (rule.from_port,
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rule.to_port)]
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