Edan David
d79e3afc4c
This is a workaround to libvirt issue described here: https://bugzilla.redhat.com/show_bug.cgi?id=1372944. The problem is that libvirt dosn't update the mac address of the netdevice, instead it uses netlink to configure the mac address of the VF. For macvtap to work libvirt should set the mac address on the VF net device and using netlink. Until this is fixed we should set both of them in nova. Change-Id: If32828840b552a73400df052fc12a8b5a24f202d Closes-Bug: #1622292
1914 lines
72 KiB
Python
1914 lines
72 KiB
Python
# Copyright (c) 2011 X.commerce, a business unit of eBay Inc.
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# 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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#
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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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"""Implements vlans, bridges, and iptables rules using linux utilities."""
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import calendar
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import inspect
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import os
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import re
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import time
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import netaddr
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import netifaces
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from oslo_concurrency import processutils
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from oslo_log import log as logging
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from oslo_serialization import jsonutils
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from oslo_utils import excutils
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from oslo_utils import fileutils
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from oslo_utils import importutils
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from oslo_utils import timeutils
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import six
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import nova.conf
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from nova import exception
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from nova.i18n import _, _LE, _LW
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from nova.network import model as network_model
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from nova import objects
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from nova.pci import utils as pci_utils
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from nova import utils
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LOG = logging.getLogger(__name__)
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CONF = nova.conf.CONF
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# NOTE(vish): Iptables supports chain names of up to 28 characters, and we
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# add up to 12 characters to binary_name which is used as a prefix,
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# so we limit it to 16 characters.
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# (max_chain_name_length - len('-POSTROUTING') == 16)
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def get_binary_name():
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"""Grab the name of the binary we're running in."""
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return os.path.basename(inspect.stack()[-1][1])[:16]
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binary_name = get_binary_name()
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class IptablesRule(object):
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"""An iptables rule.
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You shouldn't need to use this class directly, it's only used by
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IptablesManager.
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"""
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def __init__(self, chain, rule, wrap=True, top=False):
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self.chain = chain
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self.rule = rule
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self.wrap = wrap
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self.top = top
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def __eq__(self, other):
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return ((self.chain == other.chain) and
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(self.rule == other.rule) and
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(self.top == other.top) and
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(self.wrap == other.wrap))
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def __ne__(self, other):
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return not self == other
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def __repr__(self):
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if self.wrap:
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chain = '%s-%s' % (binary_name, self.chain)
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else:
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chain = self.chain
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# new rules should have a zero [packet: byte] count
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return '[0:0] -A %s %s' % (chain, self.rule)
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class IptablesTable(object):
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"""An iptables table."""
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def __init__(self):
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self.rules = []
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self.remove_rules = []
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self.chains = set()
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self.unwrapped_chains = set()
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self.remove_chains = set()
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self.dirty = True
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def has_chain(self, name, wrap=True):
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if wrap:
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return name in self.chains
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else:
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return name in self.unwrapped_chains
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def add_chain(self, name, wrap=True):
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"""Adds a named chain to the table.
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The chain name is wrapped to be unique for the component creating
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it, so different components of Nova can safely create identically
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named chains without interfering with one another.
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At the moment, its wrapped name is <binary name>-<chain name>,
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so if nova-compute creates a chain named 'OUTPUT', it'll actually
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end up named 'nova-compute-OUTPUT'.
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"""
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if wrap:
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self.chains.add(name)
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else:
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self.unwrapped_chains.add(name)
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self.dirty = True
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def remove_chain(self, name, wrap=True):
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"""Remove named chain.
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This removal "cascades". All rule in the chain are removed, as are
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all rules in other chains that jump to it.
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If the chain is not found, this is merely logged.
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"""
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if wrap:
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chain_set = self.chains
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else:
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chain_set = self.unwrapped_chains
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if name not in chain_set:
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LOG.warning(_LW('Attempted to remove chain %s which does not '
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'exist'), name)
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return
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self.dirty = True
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# non-wrapped chains and rules need to be dealt with specially,
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# so we keep a list of them to be iterated over in apply()
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if not wrap:
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self.remove_chains.add(name)
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chain_set.remove(name)
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if not wrap:
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self.remove_rules += [r for r in self.rules if r.chain == name]
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self.rules = [r for r in self.rules if r.chain != name]
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if wrap:
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jump_snippet = '-j %s-%s' % (binary_name, name)
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else:
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jump_snippet = '-j %s' % (name,)
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if not wrap:
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self.remove_rules += [r for r in self.rules
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if jump_snippet in r.rule]
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self.rules = [r for r in self.rules if jump_snippet not in r.rule]
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def add_rule(self, chain, rule, wrap=True, top=False):
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"""Add a rule to the table.
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This is just like what you'd feed to iptables, just without
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the '-A <chain name>' bit at the start.
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However, if you need to jump to one of your wrapped chains,
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prepend its name with a '$' which will ensure the wrapping
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is applied correctly.
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"""
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if wrap and chain not in self.chains:
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raise ValueError(_('Unknown chain: %r') % chain)
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if '$' in rule:
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rule = ' '.join(map(self._wrap_target_chain, rule.split(' ')))
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rule_obj = IptablesRule(chain, rule, wrap, top)
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if rule_obj in self.rules:
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LOG.debug("Skipping duplicate iptables rule addition. "
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"%(rule)r already in %(rules)r",
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{'rule': rule_obj, 'rules': self.rules})
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else:
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self.rules.append(IptablesRule(chain, rule, wrap, top))
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self.dirty = True
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def _wrap_target_chain(self, s):
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if s.startswith('$'):
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return '%s-%s' % (binary_name, s[1:])
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return s
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def remove_rule(self, chain, rule, wrap=True, top=False):
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"""Remove a rule from a chain.
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Note: The rule must be exactly identical to the one that was added.
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You cannot switch arguments around like you can with the iptables
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CLI tool.
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"""
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try:
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self.rules.remove(IptablesRule(chain, rule, wrap, top))
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if not wrap:
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self.remove_rules.append(IptablesRule(chain, rule, wrap, top))
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self.dirty = True
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except ValueError:
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LOG.warning(_LW('Tried to remove rule that was not there:'
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' %(chain)r %(rule)r %(wrap)r %(top)r'),
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{'chain': chain, 'rule': rule,
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'top': top, 'wrap': wrap})
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def remove_rules_regex(self, regex):
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"""Remove all rules matching regex."""
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if isinstance(regex, six.string_types):
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regex = re.compile(regex)
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num_rules = len(self.rules)
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self.rules = [r for r in self.rules if not regex.match(str(r))]
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removed = num_rules - len(self.rules)
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if removed > 0:
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self.dirty = True
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return removed
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def empty_chain(self, chain, wrap=True):
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"""Remove all rules from a chain."""
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chained_rules = [rule for rule in self.rules
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if rule.chain == chain and rule.wrap == wrap]
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if chained_rules:
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self.dirty = True
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for rule in chained_rules:
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self.rules.remove(rule)
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class IptablesManager(object):
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"""Wrapper for iptables.
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See IptablesTable for some usage docs
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A number of chains are set up to begin with.
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First, nova-filter-top. It's added at the top of FORWARD and OUTPUT. Its
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name is not wrapped, so it's shared between the various nova workers. It's
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intended for rules that need to live at the top of the FORWARD and OUTPUT
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chains. It's in both the ipv4 and ipv6 set of tables.
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For ipv4 and ipv6, the built-in INPUT, OUTPUT, and FORWARD filter chains
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are wrapped, meaning that the "real" INPUT chain has a rule that jumps to
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the wrapped INPUT chain, etc. Additionally, there's a wrapped chain named
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"local" which is jumped to from nova-filter-top.
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For ipv4, the built-in PREROUTING, OUTPUT, and POSTROUTING nat chains are
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wrapped in the same was as the built-in filter chains. Additionally,
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there's a snat chain that is applied after the POSTROUTING chain.
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"""
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def __init__(self, execute=None):
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if not execute:
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self.execute = _execute
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else:
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self.execute = execute
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self.ipv4 = {'filter': IptablesTable(),
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'nat': IptablesTable(),
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'mangle': IptablesTable()}
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self.ipv6 = {'filter': IptablesTable()}
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self.iptables_apply_deferred = False
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# Add a nova-filter-top chain. It's intended to be shared
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# among the various nova components. It sits at the very top
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# of FORWARD and OUTPUT.
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for tables in [self.ipv4, self.ipv6]:
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tables['filter'].add_chain('nova-filter-top', wrap=False)
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tables['filter'].add_rule('FORWARD', '-j nova-filter-top',
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wrap=False, top=True)
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tables['filter'].add_rule('OUTPUT', '-j nova-filter-top',
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wrap=False, top=True)
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tables['filter'].add_chain('local')
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tables['filter'].add_rule('nova-filter-top', '-j $local',
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wrap=False)
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# Wrap the built-in chains
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builtin_chains = {4: {'filter': ['INPUT', 'OUTPUT', 'FORWARD'],
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'nat': ['PREROUTING', 'OUTPUT', 'POSTROUTING'],
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'mangle': ['POSTROUTING']},
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6: {'filter': ['INPUT', 'OUTPUT', 'FORWARD']}}
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for ip_version in builtin_chains:
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if ip_version == 4:
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tables = self.ipv4
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elif ip_version == 6:
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tables = self.ipv6
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for table, chains in builtin_chains[ip_version].items():
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for chain in chains:
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tables[table].add_chain(chain)
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tables[table].add_rule(chain, '-j $%s' % (chain,),
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wrap=False)
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# Add a nova-postrouting-bottom chain. It's intended to be shared
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# among the various nova components. We set it as the last chain
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# of POSTROUTING chain.
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self.ipv4['nat'].add_chain('nova-postrouting-bottom', wrap=False)
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self.ipv4['nat'].add_rule('POSTROUTING', '-j nova-postrouting-bottom',
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wrap=False)
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# We add a snat chain to the shared nova-postrouting-bottom chain
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# so that it's applied last.
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self.ipv4['nat'].add_chain('snat')
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self.ipv4['nat'].add_rule('nova-postrouting-bottom', '-j $snat',
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wrap=False)
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# And then we add a float-snat chain and jump to first thing in
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# the snat chain.
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self.ipv4['nat'].add_chain('float-snat')
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self.ipv4['nat'].add_rule('snat', '-j $float-snat')
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def defer_apply_on(self):
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self.iptables_apply_deferred = True
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def defer_apply_off(self):
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self.iptables_apply_deferred = False
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self.apply()
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def dirty(self):
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for table in six.itervalues(self.ipv4):
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if table.dirty:
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return True
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if CONF.use_ipv6:
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for table in six.itervalues(self.ipv6):
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if table.dirty:
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return True
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return False
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def apply(self):
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if self.iptables_apply_deferred:
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return
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if self.dirty():
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self._apply()
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else:
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LOG.debug("Skipping apply due to lack of new rules")
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@utils.synchronized('iptables', external=True)
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def _apply(self):
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"""Apply the current in-memory set of iptables rules.
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This will blow away any rules left over from previous runs of the
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same component of Nova, and replace them with our current set of
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rules. This happens atomically, thanks to iptables-restore.
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"""
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s = [('iptables', self.ipv4)]
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if CONF.use_ipv6:
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s += [('ip6tables', self.ipv6)]
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for cmd, tables in s:
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all_tables, _err = self.execute('%s-save' % (cmd,), '-c',
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run_as_root=True,
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attempts=5)
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all_lines = all_tables.split('\n')
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for table_name, table in tables.items():
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start, end = self._find_table(all_lines, table_name)
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all_lines[start:end] = self._modify_rules(
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all_lines[start:end], table, table_name)
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table.dirty = False
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self.execute('%s-restore' % (cmd,), '-c', run_as_root=True,
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process_input=six.b('\n'.join(all_lines)),
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attempts=5)
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LOG.debug("IPTablesManager.apply completed with success")
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def _find_table(self, lines, table_name):
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if len(lines) < 3:
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# length only <2 when fake iptables
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return (0, 0)
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try:
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start = lines.index('*%s' % table_name) - 1
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except ValueError:
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# Couldn't find table_name
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return (0, 0)
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end = lines[start:].index('COMMIT') + start + 2
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return (start, end)
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def _modify_rules(self, current_lines, table, table_name):
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unwrapped_chains = table.unwrapped_chains
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chains = sorted(table.chains)
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remove_chains = table.remove_chains
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rules = table.rules
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remove_rules = table.remove_rules
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if not current_lines:
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fake_table = ['#Generated by nova',
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'*' + table_name, 'COMMIT',
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'#Completed by nova']
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current_lines = fake_table
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# Remove any trace of our rules
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new_filter = [line for line in current_lines
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if binary_name not in line]
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top_rules = []
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bottom_rules = []
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if CONF.iptables_top_regex:
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regex = re.compile(CONF.iptables_top_regex)
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temp_filter = [line for line in new_filter if regex.search(line)]
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for rule_str in temp_filter:
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new_filter = [s for s in new_filter
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if s.strip() != rule_str.strip()]
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top_rules = temp_filter
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if CONF.iptables_bottom_regex:
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regex = re.compile(CONF.iptables_bottom_regex)
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temp_filter = [line for line in new_filter if regex.search(line)]
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for rule_str in temp_filter:
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new_filter = [s for s in new_filter
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if s.strip() != rule_str.strip()]
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bottom_rules = temp_filter
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seen_chains = False
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rules_index = 0
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for rules_index, rule in enumerate(new_filter):
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if not seen_chains:
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if rule.startswith(':'):
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seen_chains = True
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else:
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if not rule.startswith(':'):
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break
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if not seen_chains:
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rules_index = 2
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our_rules = top_rules
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bot_rules = []
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for rule in rules:
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rule_str = str(rule)
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if rule.top:
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# rule.top == True means we want this rule to be at the top.
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# Further down, we weed out duplicates from the bottom of the
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# list, so here we remove the dupes ahead of time.
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# We don't want to remove an entry if it has non-zero
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# [packet:byte] counts and replace it with [0:0], so let's
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# go look for a duplicate, and over-ride our table rule if
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# found.
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# ignore [packet:byte] counts at beginning of line
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if rule_str.startswith('['):
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rule_str = rule_str.split(']', 1)[1]
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dup_filter = [s for s in new_filter
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if rule_str.strip() in s.strip()]
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new_filter = [s for s in new_filter
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if rule_str.strip() not in s.strip()]
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# if no duplicates, use original rule
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if dup_filter:
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# grab the last entry, if there is one
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dup = list(dup_filter)[-1]
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rule_str = str(dup)
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else:
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rule_str = str(rule)
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rule_str.strip()
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our_rules += [rule_str]
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else:
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bot_rules += [rule_str]
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our_rules += bot_rules
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new_filter = list(new_filter)
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new_filter[rules_index:rules_index] = our_rules
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new_filter[rules_index:rules_index] = [':%s - [0:0]' % (name,)
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for name in unwrapped_chains]
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new_filter[rules_index:rules_index] = [':%s-%s - [0:0]' %
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(binary_name, name,)
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for name in chains]
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commit_index = new_filter.index('COMMIT')
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new_filter[commit_index:commit_index] = bottom_rules
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seen_lines = set()
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def _weed_out_duplicates(line):
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# ignore [packet:byte] counts at beginning of lines
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if line.startswith('['):
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line = line.split(']', 1)[1]
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line = line.strip()
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if line in seen_lines:
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return False
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else:
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seen_lines.add(line)
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return True
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def _weed_out_removes(line):
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# We need to find exact matches here
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if line.startswith(':'):
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# it's a chain, for example, ":nova-billing - [0:0]"
|
|
# strip off everything except the chain name
|
|
line = line.split(':')[1]
|
|
line = line.split('- [')[0]
|
|
line = line.strip()
|
|
for chain in remove_chains:
|
|
if chain == line:
|
|
remove_chains.remove(chain)
|
|
return False
|
|
elif line.startswith('['):
|
|
# it's a rule
|
|
# ignore [packet:byte] counts at beginning of lines
|
|
line = line.split(']', 1)[1]
|
|
line = line.strip()
|
|
for rule in remove_rules:
|
|
# ignore [packet:byte] counts at beginning of rules
|
|
rule_str = str(rule)
|
|
rule_str = rule_str.split(' ', 1)[1]
|
|
rule_str = rule_str.strip()
|
|
if rule_str == line:
|
|
remove_rules.remove(rule)
|
|
return False
|
|
|
|
# Leave it alone
|
|
return True
|
|
|
|
# We filter duplicates, letting the *last* occurrence take
|
|
# precedence. We also filter out anything in the "remove"
|
|
# lists.
|
|
new_filter = list(new_filter)
|
|
new_filter.reverse()
|
|
new_filter = filter(_weed_out_duplicates, new_filter)
|
|
new_filter = filter(_weed_out_removes, new_filter)
|
|
new_filter = list(new_filter)
|
|
new_filter.reverse()
|
|
|
|
# flush lists, just in case we didn't find something
|
|
remove_chains.clear()
|
|
for rule in remove_rules:
|
|
remove_rules.remove(rule)
|
|
|
|
return new_filter
|
|
|
|
|
|
# NOTE(jkoelker) This is just a nice little stub point since mocking
|
|
# builtins with mox is a nightmare
|
|
def write_to_file(file, data, mode='w'):
|
|
with open(file, mode) as f:
|
|
f.write(data)
|
|
|
|
|
|
def is_pid_cmdline_correct(pid, match):
|
|
"""Ensure that the cmdline for a pid seems sane
|
|
|
|
Because pids are recycled, blindly killing by pid is something to
|
|
avoid. This provides the ability to include a substring that is
|
|
expected in the cmdline as a safety check.
|
|
"""
|
|
try:
|
|
with open('/proc/%d/cmdline' % pid) as f:
|
|
cmdline = f.read()
|
|
return match in cmdline
|
|
except EnvironmentError:
|
|
return False
|
|
|
|
|
|
def metadata_forward():
|
|
"""Create forwarding rule for metadata."""
|
|
if CONF.metadata_host != '127.0.0.1':
|
|
iptables_manager.ipv4['nat'].add_rule('PREROUTING',
|
|
'-s 0.0.0.0/0 -d 169.254.169.254/32 '
|
|
'-p tcp -m tcp --dport 80 -j DNAT '
|
|
'--to-destination %s:%s' %
|
|
(CONF.metadata_host,
|
|
CONF.metadata_port))
|
|
else:
|
|
iptables_manager.ipv4['nat'].add_rule('PREROUTING',
|
|
'-s 0.0.0.0/0 -d 169.254.169.254/32 '
|
|
'-p tcp -m tcp --dport 80 '
|
|
'-j REDIRECT --to-ports %s' %
|
|
CONF.metadata_port)
|
|
iptables_manager.apply()
|
|
|
|
|
|
def _iptables_dest(ip):
|
|
if ((netaddr.IPAddress(ip).version == 4 and ip == '127.0.0.1')
|
|
or ip == '::1'):
|
|
return '-m addrtype --dst-type LOCAL'
|
|
else:
|
|
return '-d %s' % ip
|
|
|
|
|
|
def metadata_accept():
|
|
"""Create the filter accept rule for metadata."""
|
|
|
|
rule = ('-p tcp -m tcp --dport %s %s -j ACCEPT' %
|
|
(CONF.metadata_port, _iptables_dest(CONF.metadata_host)))
|
|
|
|
if netaddr.IPAddress(CONF.metadata_host).version == 4:
|
|
iptables_manager.ipv4['filter'].add_rule('INPUT', rule)
|
|
else:
|
|
iptables_manager.ipv6['filter'].add_rule('INPUT', rule)
|
|
|
|
iptables_manager.apply()
|
|
|
|
|
|
def add_snat_rule(ip_range, is_external=False):
|
|
if CONF.routing_source_ip:
|
|
if is_external:
|
|
if CONF.force_snat_range:
|
|
snat_range = CONF.force_snat_range
|
|
else:
|
|
snat_range = []
|
|
else:
|
|
snat_range = ['0.0.0.0/0']
|
|
for dest_range in snat_range:
|
|
rule = ('-s %s -d %s -j SNAT --to-source %s'
|
|
% (ip_range, dest_range, CONF.routing_source_ip))
|
|
if not is_external and CONF.public_interface:
|
|
rule += ' -o %s' % CONF.public_interface
|
|
iptables_manager.ipv4['nat'].add_rule('snat', rule)
|
|
iptables_manager.apply()
|
|
|
|
|
|
def init_host(ip_range, is_external=False):
|
|
"""Basic networking setup goes here."""
|
|
# NOTE(devcamcar): Cloud public SNAT entries and the default
|
|
# SNAT rule for outbound traffic.
|
|
|
|
add_snat_rule(ip_range, is_external)
|
|
|
|
rules = []
|
|
if is_external:
|
|
for snat_range in CONF.force_snat_range:
|
|
rules.append('PREROUTING -p ipv4 --ip-src %s --ip-dst %s '
|
|
'-j redirect --redirect-target ACCEPT' %
|
|
(ip_range, snat_range))
|
|
if rules:
|
|
ensure_ebtables_rules(rules, 'nat')
|
|
|
|
iptables_manager.ipv4['nat'].add_rule('POSTROUTING',
|
|
'-s %s -d %s/32 -j ACCEPT' %
|
|
(ip_range, CONF.metadata_host))
|
|
|
|
for dmz in CONF.dmz_cidr:
|
|
iptables_manager.ipv4['nat'].add_rule('POSTROUTING',
|
|
'-s %s -d %s -j ACCEPT' %
|
|
(ip_range, dmz))
|
|
|
|
iptables_manager.ipv4['nat'].add_rule('POSTROUTING',
|
|
'-s %(range)s -d %(range)s '
|
|
'-m conntrack ! --ctstate DNAT '
|
|
'-j ACCEPT' %
|
|
{'range': ip_range})
|
|
iptables_manager.apply()
|
|
|
|
|
|
def send_arp_for_ip(ip, device, count):
|
|
out, err = _execute('arping', '-U', ip,
|
|
'-A', '-I', device,
|
|
'-c', str(count),
|
|
run_as_root=True, check_exit_code=False)
|
|
|
|
if err:
|
|
LOG.debug('arping error for IP %s', ip)
|
|
|
|
|
|
def bind_floating_ip(floating_ip, device):
|
|
"""Bind IP to public interface."""
|
|
_execute('ip', 'addr', 'add', str(floating_ip) + '/32',
|
|
'dev', device,
|
|
run_as_root=True, check_exit_code=[0, 2, 254])
|
|
|
|
if CONF.send_arp_for_ha and CONF.send_arp_for_ha_count > 0:
|
|
send_arp_for_ip(floating_ip, device, CONF.send_arp_for_ha_count)
|
|
|
|
|
|
def unbind_floating_ip(floating_ip, device):
|
|
"""Unbind a public IP from public interface."""
|
|
_execute('ip', 'addr', 'del', str(floating_ip) + '/32',
|
|
'dev', device,
|
|
run_as_root=True, check_exit_code=[0, 2, 254])
|
|
|
|
|
|
def ensure_metadata_ip():
|
|
"""Sets up local metadata IP."""
|
|
_execute('ip', 'addr', 'add', '169.254.169.254/32',
|
|
'scope', 'link', 'dev', 'lo',
|
|
run_as_root=True, check_exit_code=[0, 2, 254])
|
|
|
|
|
|
def ensure_vpn_forward(public_ip, port, private_ip):
|
|
"""Sets up forwarding rules for vlan."""
|
|
iptables_manager.ipv4['filter'].add_rule('FORWARD',
|
|
'-d %s -p udp '
|
|
'--dport 1194 '
|
|
'-j ACCEPT' % private_ip)
|
|
iptables_manager.ipv4['nat'].add_rule('PREROUTING',
|
|
'-d %s -p udp '
|
|
'--dport %s -j DNAT --to %s:1194' %
|
|
(public_ip, port, private_ip))
|
|
iptables_manager.ipv4['nat'].add_rule('OUTPUT',
|
|
'-d %s -p udp '
|
|
'--dport %s -j DNAT --to %s:1194' %
|
|
(public_ip, port, private_ip))
|
|
iptables_manager.apply()
|
|
|
|
|
|
def ensure_floating_forward(floating_ip, fixed_ip, device, network):
|
|
"""Ensure floating IP forwarding rule."""
|
|
# NOTE(vish): Make sure we never have duplicate rules for the same ip
|
|
regex = '.*\s+%s(/32|\s+|$)' % floating_ip
|
|
num_rules = iptables_manager.ipv4['nat'].remove_rules_regex(regex)
|
|
if num_rules:
|
|
msg = _LW('Removed %(num)d duplicate rules for floating IP %(float)s')
|
|
LOG.warning(msg, {'num': num_rules, 'float': floating_ip})
|
|
for chain, rule in floating_forward_rules(floating_ip, fixed_ip, device):
|
|
iptables_manager.ipv4['nat'].add_rule(chain, rule)
|
|
iptables_manager.apply()
|
|
if device != network['bridge']:
|
|
ensure_ebtables_rules(*floating_ebtables_rules(fixed_ip, network))
|
|
|
|
|
|
def remove_floating_forward(floating_ip, fixed_ip, device, network):
|
|
"""Remove forwarding for floating IP."""
|
|
for chain, rule in floating_forward_rules(floating_ip, fixed_ip, device):
|
|
iptables_manager.ipv4['nat'].remove_rule(chain, rule)
|
|
iptables_manager.apply()
|
|
if device != network['bridge']:
|
|
remove_ebtables_rules(*floating_ebtables_rules(fixed_ip, network))
|
|
|
|
|
|
def floating_ebtables_rules(fixed_ip, network):
|
|
"""Makes sure only in-network traffic is bridged."""
|
|
return (['PREROUTING --logical-in %s -p ipv4 --ip-src %s '
|
|
'! --ip-dst %s -j redirect --redirect-target ACCEPT' %
|
|
(network['bridge'], fixed_ip, network['cidr'])], 'nat')
|
|
|
|
|
|
def floating_forward_rules(floating_ip, fixed_ip, device):
|
|
rules = []
|
|
rule = '-s %s -j SNAT --to %s' % (fixed_ip, floating_ip)
|
|
if device:
|
|
rules.append(('float-snat', rule + ' -d %s' % fixed_ip))
|
|
rules.append(('float-snat', rule + ' -o %s' % device))
|
|
else:
|
|
rules.append(('float-snat', rule))
|
|
rules.append(
|
|
('PREROUTING', '-d %s -j DNAT --to %s' % (floating_ip, fixed_ip)))
|
|
rules.append(
|
|
('OUTPUT', '-d %s -j DNAT --to %s' % (floating_ip, fixed_ip)))
|
|
rules.append(('POSTROUTING', '-s %s -m conntrack --ctstate DNAT -j SNAT '
|
|
'--to-source %s' %
|
|
(fixed_ip, floating_ip)))
|
|
return rules
|
|
|
|
|
|
def clean_conntrack(fixed_ip):
|
|
try:
|
|
_execute('conntrack', '-D', '-r', fixed_ip, run_as_root=True,
|
|
check_exit_code=[0, 1])
|
|
except processutils.ProcessExecutionError:
|
|
LOG.exception(_LE('Error deleting conntrack entries for %s'), fixed_ip)
|
|
|
|
|
|
def _enable_ipv4_forwarding():
|
|
sysctl_key = 'net.ipv4.ip_forward'
|
|
stdout, stderr = _execute('sysctl', '-n', sysctl_key)
|
|
if stdout.strip() is not '1':
|
|
_execute('sysctl', '-w', '%s=1' % sysctl_key, run_as_root=True)
|
|
|
|
|
|
@utils.synchronized('lock_gateway', external=True)
|
|
def initialize_gateway_device(dev, network_ref):
|
|
if not network_ref:
|
|
return
|
|
|
|
_enable_ipv4_forwarding()
|
|
|
|
# NOTE(vish): The ip for dnsmasq has to be the first address on the
|
|
# bridge for it to respond to requests properly
|
|
try:
|
|
prefix = network_ref.cidr.prefixlen
|
|
except AttributeError:
|
|
prefix = network_ref['cidr'].rpartition('/')[2]
|
|
|
|
full_ip = '%s/%s' % (network_ref['dhcp_server'], prefix)
|
|
new_ip_params = [[full_ip, 'brd', network_ref['broadcast']]]
|
|
old_ip_params = []
|
|
out, err = _execute('ip', 'addr', 'show', 'dev', dev,
|
|
'scope', 'global')
|
|
for line in out.split('\n'):
|
|
fields = line.split()
|
|
if fields and fields[0] == 'inet':
|
|
if fields[-2] in ('secondary', 'dynamic'):
|
|
ip_params = fields[1:-2]
|
|
else:
|
|
ip_params = fields[1:-1]
|
|
old_ip_params.append(ip_params)
|
|
if ip_params[0] != full_ip:
|
|
new_ip_params.append(ip_params)
|
|
if not old_ip_params or old_ip_params[0][0] != full_ip:
|
|
old_routes = []
|
|
result = _execute('ip', 'route', 'show', 'dev', dev)
|
|
if result:
|
|
out, err = result
|
|
for line in out.split('\n'):
|
|
fields = line.split()
|
|
if fields and 'via' in fields:
|
|
old_routes.append(fields)
|
|
_execute('ip', 'route', 'del', fields[0],
|
|
'dev', dev, run_as_root=True)
|
|
for ip_params in old_ip_params:
|
|
_execute(*_ip_bridge_cmd('del', ip_params, dev),
|
|
run_as_root=True, check_exit_code=[0, 2, 254])
|
|
for ip_params in new_ip_params:
|
|
_execute(*_ip_bridge_cmd('add', ip_params, dev),
|
|
run_as_root=True, check_exit_code=[0, 2, 254])
|
|
|
|
for fields in old_routes:
|
|
_execute('ip', 'route', 'add', *fields,
|
|
run_as_root=True)
|
|
if CONF.send_arp_for_ha and CONF.send_arp_for_ha_count > 0:
|
|
send_arp_for_ip(network_ref['dhcp_server'], dev,
|
|
CONF.send_arp_for_ha_count)
|
|
if CONF.use_ipv6:
|
|
_execute('ip', '-f', 'inet6', 'addr',
|
|
'change', network_ref['cidr_v6'],
|
|
'dev', dev, run_as_root=True)
|
|
|
|
|
|
def get_dhcp_leases(context, network_ref):
|
|
"""Return a network's hosts config in dnsmasq leasefile format."""
|
|
hosts = []
|
|
host = None
|
|
if network_ref['multi_host']:
|
|
host = CONF.host
|
|
for fixedip in objects.FixedIPList.get_by_network(context,
|
|
network_ref,
|
|
host=host):
|
|
# NOTE(cfb): Don't return a lease entry if the IP isn't
|
|
# already leased
|
|
if fixedip.leased:
|
|
hosts.append(_host_lease(fixedip))
|
|
|
|
return '\n'.join(hosts)
|
|
|
|
|
|
def get_dhcp_hosts(context, network_ref, fixedips):
|
|
"""Get network's hosts config in dhcp-host format."""
|
|
hosts = []
|
|
macs = set()
|
|
for fixedip in fixedips:
|
|
if fixedip.allocated:
|
|
if fixedip.virtual_interface.address not in macs:
|
|
hosts.append(_host_dhcp(fixedip))
|
|
macs.add(fixedip.virtual_interface.address)
|
|
return '\n'.join(hosts)
|
|
|
|
|
|
def get_dns_hosts(context, network_ref):
|
|
"""Get network's DNS hosts in hosts format."""
|
|
hosts = []
|
|
for fixedip in objects.FixedIPList.get_by_network(context, network_ref):
|
|
if fixedip.allocated:
|
|
hosts.append(_host_dns(fixedip))
|
|
return '\n'.join(hosts)
|
|
|
|
|
|
def _add_dnsmasq_accept_rules(dev):
|
|
"""Allow DHCP and DNS traffic through to dnsmasq."""
|
|
table = iptables_manager.ipv4['filter']
|
|
for port in [67, 53]:
|
|
for proto in ['udp', 'tcp']:
|
|
args = {'dev': dev, 'port': port, 'proto': proto}
|
|
table.add_rule('INPUT',
|
|
'-i %(dev)s -p %(proto)s -m %(proto)s '
|
|
'--dport %(port)s -j ACCEPT' % args)
|
|
iptables_manager.apply()
|
|
|
|
|
|
def _remove_dnsmasq_accept_rules(dev):
|
|
"""Remove DHCP and DNS traffic allowed through to dnsmasq."""
|
|
table = iptables_manager.ipv4['filter']
|
|
for port in [67, 53]:
|
|
for proto in ['udp', 'tcp']:
|
|
args = {'dev': dev, 'port': port, 'proto': proto}
|
|
table.remove_rule('INPUT',
|
|
'-i %(dev)s -p %(proto)s -m %(proto)s '
|
|
'--dport %(port)s -j ACCEPT' % args)
|
|
iptables_manager.apply()
|
|
|
|
|
|
# NOTE(russellb) Curious why this is needed? Check out this explanation from
|
|
# markmc: https://bugzilla.redhat.com/show_bug.cgi?id=910619#c6
|
|
def _add_dhcp_mangle_rule(dev):
|
|
table = iptables_manager.ipv4['mangle']
|
|
table.add_rule('POSTROUTING',
|
|
'-o %s -p udp -m udp --dport 68 -j CHECKSUM '
|
|
'--checksum-fill' % dev)
|
|
iptables_manager.apply()
|
|
|
|
|
|
def _remove_dhcp_mangle_rule(dev):
|
|
table = iptables_manager.ipv4['mangle']
|
|
table.remove_rule('POSTROUTING',
|
|
'-o %s -p udp -m udp --dport 68 -j CHECKSUM '
|
|
'--checksum-fill' % dev)
|
|
iptables_manager.apply()
|
|
|
|
|
|
def get_dhcp_opts(context, network_ref, fixedips):
|
|
"""Get network's hosts config in dhcp-opts format."""
|
|
gateway = network_ref['gateway']
|
|
# NOTE(vish): if we are in multi-host mode and we are not sharing
|
|
# addresses, then we actually need to hand out the
|
|
# dhcp server address as the gateway.
|
|
if network_ref['multi_host'] and not (network_ref['share_address'] or
|
|
CONF.share_dhcp_address):
|
|
gateway = network_ref['dhcp_server']
|
|
hosts = []
|
|
if CONF.use_single_default_gateway:
|
|
for fixedip in fixedips:
|
|
if fixedip.allocated:
|
|
vif_id = fixedip.virtual_interface_id
|
|
if fixedip.default_route:
|
|
hosts.append(_host_dhcp_opts(vif_id, gateway))
|
|
else:
|
|
hosts.append(_host_dhcp_opts(vif_id))
|
|
else:
|
|
hosts.append(_host_dhcp_opts(None, gateway))
|
|
return '\n'.join(hosts)
|
|
|
|
|
|
def release_dhcp(dev, address, mac_address):
|
|
if device_exists(dev):
|
|
try:
|
|
utils.execute('dhcp_release', dev, address, mac_address,
|
|
run_as_root=True)
|
|
except processutils.ProcessExecutionError:
|
|
raise exception.NetworkDhcpReleaseFailed(address=address,
|
|
mac_address=mac_address)
|
|
|
|
|
|
def update_dhcp(context, dev, network_ref):
|
|
conffile = _dhcp_file(dev, 'conf')
|
|
host = None
|
|
if network_ref['multi_host']:
|
|
host = CONF.host
|
|
fixedips = objects.FixedIPList.get_by_network(context,
|
|
network_ref,
|
|
host=host)
|
|
write_to_file(conffile, get_dhcp_hosts(context, network_ref, fixedips))
|
|
restart_dhcp(context, dev, network_ref, fixedips)
|
|
|
|
|
|
def update_dns(context, dev, network_ref):
|
|
hostsfile = _dhcp_file(dev, 'hosts')
|
|
host = None
|
|
if network_ref['multi_host']:
|
|
host = CONF.host
|
|
fixedips = objects.FixedIPList.get_by_network(context,
|
|
network_ref,
|
|
host=host)
|
|
write_to_file(hostsfile, get_dns_hosts(context, network_ref))
|
|
restart_dhcp(context, dev, network_ref, fixedips)
|
|
|
|
|
|
def kill_dhcp(dev):
|
|
pid = _dnsmasq_pid_for(dev)
|
|
if pid:
|
|
# Check that the process exists and looks like a dnsmasq process
|
|
conffile = _dhcp_file(dev, 'conf')
|
|
if is_pid_cmdline_correct(pid, conffile.split('/')[-1]):
|
|
_execute('kill', '-9', pid, run_as_root=True)
|
|
else:
|
|
LOG.debug('Pid %d is stale, skip killing dnsmasq', pid)
|
|
_remove_dnsmasq_accept_rules(dev)
|
|
_remove_dhcp_mangle_rule(dev)
|
|
|
|
|
|
# NOTE(ja): Sending a HUP only reloads the hostfile, so any
|
|
# configuration options (like dchp-range, vlan, ...)
|
|
# aren't reloaded.
|
|
@utils.synchronized('dnsmasq_start')
|
|
def restart_dhcp(context, dev, network_ref, fixedips):
|
|
"""(Re)starts a dnsmasq server for a given network.
|
|
|
|
If a dnsmasq instance is already running then send a HUP
|
|
signal causing it to reload, otherwise spawn a new instance.
|
|
|
|
"""
|
|
conffile = _dhcp_file(dev, 'conf')
|
|
|
|
optsfile = _dhcp_file(dev, 'opts')
|
|
write_to_file(optsfile, get_dhcp_opts(context, network_ref, fixedips))
|
|
os.chmod(optsfile, 0o644)
|
|
|
|
_add_dhcp_mangle_rule(dev)
|
|
|
|
# Make sure dnsmasq can actually read it (it setuid()s to "nobody")
|
|
os.chmod(conffile, 0o644)
|
|
|
|
pid = _dnsmasq_pid_for(dev)
|
|
|
|
# if dnsmasq is already running, then tell it to reload
|
|
if pid:
|
|
if is_pid_cmdline_correct(pid, conffile.split('/')[-1]):
|
|
try:
|
|
_execute('kill', '-HUP', pid, run_as_root=True)
|
|
_add_dnsmasq_accept_rules(dev)
|
|
return
|
|
except Exception as exc:
|
|
LOG.error(_LE('kill -HUP dnsmasq threw %s'), exc)
|
|
else:
|
|
LOG.debug('Pid %d is stale, relaunching dnsmasq', pid)
|
|
|
|
cmd = ['env',
|
|
'CONFIG_FILE=%s' % jsonutils.dumps(CONF.dhcpbridge_flagfile),
|
|
'NETWORK_ID=%s' % str(network_ref['id']),
|
|
'dnsmasq',
|
|
'--strict-order',
|
|
'--bind-interfaces',
|
|
'--conf-file=%s' % CONF.dnsmasq_config_file,
|
|
'--pid-file=%s' % _dhcp_file(dev, 'pid'),
|
|
'--dhcp-optsfile=%s' % _dhcp_file(dev, 'opts'),
|
|
'--listen-address=%s' % network_ref['dhcp_server'],
|
|
'--except-interface=lo',
|
|
'--dhcp-range=set:%s,%s,static,%s,%ss' %
|
|
(network_ref['label'],
|
|
network_ref['dhcp_start'],
|
|
network_ref['netmask'],
|
|
CONF.dhcp_lease_time),
|
|
'--dhcp-lease-max=%s' % len(netaddr.IPNetwork(network_ref['cidr'])),
|
|
'--dhcp-hostsfile=%s' % _dhcp_file(dev, 'conf'),
|
|
'--dhcp-script=%s' % CONF.dhcpbridge,
|
|
'--no-hosts',
|
|
'--leasefile-ro']
|
|
|
|
# dnsmasq currently gives an error for an empty domain,
|
|
# rather than ignoring. So only specify it if defined.
|
|
if CONF.dhcp_domain:
|
|
cmd.append('--domain=%s' % CONF.dhcp_domain)
|
|
|
|
dns_servers = CONF.dns_server
|
|
if CONF.use_network_dns_servers:
|
|
if network_ref.get('dns1'):
|
|
dns_servers.append(network_ref.get('dns1'))
|
|
if network_ref.get('dns2'):
|
|
dns_servers.append(network_ref.get('dns2'))
|
|
if network_ref['multi_host']:
|
|
cmd.append('--addn-hosts=%s' % _dhcp_file(dev, 'hosts'))
|
|
if dns_servers:
|
|
cmd.append('--no-resolv')
|
|
for dns_server in dns_servers:
|
|
cmd.append('--server=%s' % dns_server)
|
|
|
|
_execute(*cmd, run_as_root=True)
|
|
|
|
_add_dnsmasq_accept_rules(dev)
|
|
|
|
|
|
@utils.synchronized('radvd_start')
|
|
def update_ra(context, dev, network_ref):
|
|
conffile = _ra_file(dev, 'conf')
|
|
conf_str = """
|
|
interface %s
|
|
{
|
|
AdvSendAdvert on;
|
|
MinRtrAdvInterval 3;
|
|
MaxRtrAdvInterval 10;
|
|
prefix %s
|
|
{
|
|
AdvOnLink on;
|
|
AdvAutonomous on;
|
|
};
|
|
};
|
|
""" % (dev, network_ref['cidr_v6'])
|
|
write_to_file(conffile, conf_str)
|
|
|
|
# Make sure radvd can actually read it (it setuid()s to "nobody")
|
|
os.chmod(conffile, 0o644)
|
|
|
|
pid = _ra_pid_for(dev)
|
|
|
|
# if radvd is already running, then tell it to reload
|
|
if pid:
|
|
if is_pid_cmdline_correct(pid, conffile):
|
|
try:
|
|
_execute('kill', pid, run_as_root=True)
|
|
except Exception as exc:
|
|
LOG.error(_LE('killing radvd threw %s'), exc)
|
|
else:
|
|
LOG.debug('Pid %d is stale, relaunching radvd', pid)
|
|
|
|
cmd = ['radvd',
|
|
'-C', '%s' % _ra_file(dev, 'conf'),
|
|
'-p', '%s' % _ra_file(dev, 'pid')]
|
|
|
|
_execute(*cmd, run_as_root=True)
|
|
|
|
|
|
def _host_lease(fixedip):
|
|
"""Return a host string for an address in leasefile format."""
|
|
timestamp = timeutils.utcnow()
|
|
seconds_since_epoch = calendar.timegm(timestamp.utctimetuple())
|
|
return '%d %s %s %s *' % (seconds_since_epoch + CONF.dhcp_lease_time,
|
|
fixedip.virtual_interface.address,
|
|
fixedip.address,
|
|
fixedip.instance.hostname or '*')
|
|
|
|
|
|
def _host_dhcp_network(vif_id):
|
|
return 'NW-%s' % vif_id
|
|
|
|
|
|
def _host_dhcp(fixedip):
|
|
"""Return a host string for an address in dhcp-host format."""
|
|
# NOTE(cfb): dnsmasq on linux only supports 64 characters in the hostname
|
|
# field (LP #1238910). Since the . counts as a character we need
|
|
# to truncate the hostname to only 63 characters.
|
|
hostname = fixedip.instance.hostname
|
|
if len(hostname) > 63:
|
|
LOG.warning(_LW('hostname %s too long, truncating.'), hostname)
|
|
hostname = fixedip.instance.hostname[:2] + '-' +\
|
|
fixedip.instance.hostname[-60:]
|
|
if CONF.use_single_default_gateway:
|
|
net = _host_dhcp_network(fixedip.virtual_interface_id)
|
|
return '%s,%s.%s,%s,net:%s' % (fixedip.virtual_interface.address,
|
|
hostname,
|
|
CONF.dhcp_domain,
|
|
fixedip.address,
|
|
net)
|
|
else:
|
|
return '%s,%s.%s,%s' % (fixedip.virtual_interface.address,
|
|
hostname,
|
|
CONF.dhcp_domain,
|
|
fixedip.address)
|
|
|
|
|
|
def _host_dns(fixedip):
|
|
return '%s\t%s.%s' % (fixedip.address,
|
|
fixedip.instance.hostname,
|
|
CONF.dhcp_domain)
|
|
|
|
|
|
def _host_dhcp_opts(vif_id=None, gateway=None):
|
|
"""Return an empty gateway option."""
|
|
values = []
|
|
if vif_id is not None:
|
|
values.append(_host_dhcp_network(vif_id))
|
|
# NOTE(vish): 3 is the dhcp option for gateway.
|
|
values.append('3')
|
|
if gateway:
|
|
values.append('%s' % gateway)
|
|
return ','.join(values)
|
|
|
|
|
|
def _execute(*cmd, **kwargs):
|
|
"""Wrapper around utils._execute for fake_network."""
|
|
if CONF.fake_network:
|
|
LOG.debug('FAKE NET: %s', ' '.join(map(str, cmd)))
|
|
return 'fake', 0
|
|
else:
|
|
return utils.execute(*cmd, **kwargs)
|
|
|
|
|
|
def device_exists(device):
|
|
"""Check if ethernet device exists."""
|
|
return os.path.exists('/sys/class/net/%s' % device)
|
|
|
|
|
|
def _dhcp_file(dev, kind):
|
|
"""Return path to a pid, leases, hosts or conf file for a bridge/device."""
|
|
fileutils.ensure_tree(CONF.networks_path)
|
|
return os.path.abspath('%s/nova-%s.%s' % (CONF.networks_path,
|
|
dev,
|
|
kind))
|
|
|
|
|
|
def _ra_file(dev, kind):
|
|
"""Return path to a pid or conf file for a bridge/device."""
|
|
fileutils.ensure_tree(CONF.networks_path)
|
|
return os.path.abspath('%s/nova-ra-%s.%s' % (CONF.networks_path,
|
|
dev,
|
|
kind))
|
|
|
|
|
|
def _dnsmasq_pid_for(dev):
|
|
"""Returns the pid for prior dnsmasq instance for a bridge/device.
|
|
|
|
Returns None if no pid file exists.
|
|
|
|
If machine has rebooted pid might be incorrect (caller should check).
|
|
|
|
"""
|
|
pid_file = _dhcp_file(dev, 'pid')
|
|
|
|
if os.path.exists(pid_file):
|
|
try:
|
|
with open(pid_file, 'r') as f:
|
|
return int(f.read())
|
|
except (ValueError, IOError):
|
|
return None
|
|
|
|
|
|
def _ra_pid_for(dev):
|
|
"""Returns the pid for prior radvd instance for a bridge/device.
|
|
|
|
Returns None if no pid file exists.
|
|
|
|
If machine has rebooted pid might be incorrect (caller should check).
|
|
|
|
"""
|
|
pid_file = _ra_file(dev, 'pid')
|
|
|
|
if os.path.exists(pid_file):
|
|
with open(pid_file, 'r') as f:
|
|
return int(f.read())
|
|
|
|
|
|
def _ip_bridge_cmd(action, params, device):
|
|
"""Build commands to add/del IPs to bridges/devices."""
|
|
cmd = ['ip', 'addr', action]
|
|
cmd.extend(params)
|
|
cmd.extend(['dev', device])
|
|
return cmd
|
|
|
|
|
|
def _set_device_mtu(dev, mtu=None):
|
|
"""Set the device MTU."""
|
|
if mtu:
|
|
utils.execute('ip', 'link', 'set', dev, 'mtu',
|
|
mtu, run_as_root=True,
|
|
check_exit_code=[0, 2, 254])
|
|
|
|
|
|
def _create_veth_pair(dev1_name, dev2_name, mtu=None):
|
|
"""Create a pair of veth devices with the specified names,
|
|
deleting any previous devices with those names.
|
|
"""
|
|
for dev in [dev1_name, dev2_name]:
|
|
delete_net_dev(dev)
|
|
|
|
utils.execute('ip', 'link', 'add', dev1_name, 'type', 'veth', 'peer',
|
|
'name', dev2_name, run_as_root=True)
|
|
for dev in [dev1_name, dev2_name]:
|
|
utils.execute('ip', 'link', 'set', dev, 'up', run_as_root=True)
|
|
utils.execute('ip', 'link', 'set', dev, 'promisc', 'on',
|
|
run_as_root=True)
|
|
_set_device_mtu(dev, mtu)
|
|
|
|
|
|
def _ovs_vsctl(args):
|
|
full_args = ['ovs-vsctl', '--timeout=%s' % CONF.ovs_vsctl_timeout] + args
|
|
try:
|
|
return utils.execute(*full_args, run_as_root=True)
|
|
except Exception as e:
|
|
LOG.error(_LE("Unable to execute %(cmd)s. Exception: %(exception)s"),
|
|
{'cmd': full_args, 'exception': e})
|
|
raise exception.OvsConfigurationFailure(inner_exception=e)
|
|
|
|
|
|
def _create_ovs_vif_cmd(bridge, dev, iface_id, mac,
|
|
instance_id, interface_type=None):
|
|
cmd = ['--', '--if-exists', 'del-port', dev, '--',
|
|
'add-port', bridge, dev,
|
|
'--', 'set', 'Interface', dev,
|
|
'external-ids:iface-id=%s' % iface_id,
|
|
'external-ids:iface-status=active',
|
|
'external-ids:attached-mac=%s' % mac,
|
|
'external-ids:vm-uuid=%s' % instance_id]
|
|
if interface_type:
|
|
cmd += ['type=%s' % interface_type]
|
|
return cmd
|
|
|
|
|
|
def create_ovs_vif_port(bridge, dev, iface_id, mac, instance_id,
|
|
mtu=None, interface_type=None):
|
|
_ovs_vsctl(_create_ovs_vif_cmd(bridge, dev, iface_id,
|
|
mac, instance_id,
|
|
interface_type))
|
|
# Note at present there is no support for setting the
|
|
# mtu for vhost-user type ports.
|
|
if interface_type != network_model.OVS_VHOSTUSER_INTERFACE_TYPE:
|
|
_set_device_mtu(dev, mtu)
|
|
else:
|
|
LOG.debug("MTU not set on %(interface_name)s interface "
|
|
"of type %(interface_type)s.",
|
|
{'interface_name': dev,
|
|
'interface_type': interface_type})
|
|
|
|
|
|
def delete_ovs_vif_port(bridge, dev, delete_dev=True):
|
|
_ovs_vsctl(['--', '--if-exists', 'del-port', bridge, dev])
|
|
if delete_dev:
|
|
delete_net_dev(dev)
|
|
|
|
|
|
def create_ivs_vif_port(dev, iface_id, mac, instance_id):
|
|
utils.execute('ivs-ctl', 'add-port',
|
|
dev, run_as_root=True)
|
|
|
|
|
|
def delete_ivs_vif_port(dev):
|
|
utils.execute('ivs-ctl', 'del-port', dev,
|
|
run_as_root=True)
|
|
utils.execute('ip', 'link', 'delete', dev,
|
|
run_as_root=True)
|
|
|
|
|
|
def create_tap_dev(dev, mac_address=None, multiqueue=False):
|
|
if not device_exists(dev):
|
|
try:
|
|
# First, try with 'ip'
|
|
cmd = ('ip', 'tuntap', 'add', dev, 'mode', 'tap')
|
|
if multiqueue:
|
|
cmd = cmd + ('multi_queue', )
|
|
utils.execute(*cmd, run_as_root=True, check_exit_code=[0, 2, 254])
|
|
except processutils.ProcessExecutionError:
|
|
if multiqueue:
|
|
LOG.warning(
|
|
_LW('Failed to create a tap device with ip tuntap. '
|
|
'tunctl does not support creation of multi-queue '
|
|
'enabled devices, skipping fallback.'))
|
|
raise
|
|
|
|
# Second option: tunctl
|
|
utils.execute('tunctl', '-b', '-t', dev, run_as_root=True)
|
|
if mac_address:
|
|
utils.execute('ip', 'link', 'set', dev, 'address', mac_address,
|
|
run_as_root=True, check_exit_code=[0, 2, 254])
|
|
utils.execute('ip', 'link', 'set', dev, 'up', run_as_root=True,
|
|
check_exit_code=[0, 2, 254])
|
|
|
|
|
|
def create_fp_dev(dev, sockpath, sockmode):
|
|
if not device_exists(dev):
|
|
utils.execute('fp-vdev', 'add', dev, '--sockpath', sockpath,
|
|
'--sockmode', sockmode, run_as_root=True)
|
|
_set_device_mtu(dev)
|
|
utils.execute('ip', 'link', 'set', dev, 'up', run_as_root=True,
|
|
check_exit_code=[0, 2, 254])
|
|
|
|
|
|
def delete_fp_dev(dev):
|
|
if device_exists(dev):
|
|
utils.execute('fp-vdev', 'del', dev, run_as_root=True)
|
|
|
|
|
|
def delete_net_dev(dev):
|
|
"""Delete a network device only if it exists."""
|
|
if device_exists(dev):
|
|
try:
|
|
utils.execute('ip', 'link', 'delete', dev, run_as_root=True,
|
|
check_exit_code=[0, 2, 254])
|
|
LOG.debug("Net device removed: '%s'", dev)
|
|
except processutils.ProcessExecutionError:
|
|
with excutils.save_and_reraise_exception():
|
|
LOG.error(_LE("Failed removing net device: '%s'"), dev)
|
|
|
|
|
|
def delete_bridge_dev(dev):
|
|
"""Delete a network bridge."""
|
|
if device_exists(dev):
|
|
try:
|
|
utils.execute('ip', 'link', 'set', dev, 'down', run_as_root=True)
|
|
utils.execute('brctl', 'delbr', dev, run_as_root=True)
|
|
except processutils.ProcessExecutionError:
|
|
with excutils.save_and_reraise_exception():
|
|
LOG.error(_LE("Failed removing bridge device: '%s'"), dev)
|
|
|
|
|
|
# Similar to compute virt layers, the Linux network node
|
|
# code uses a flexible driver model to support different ways
|
|
# of creating ethernet interfaces and attaching them to the network.
|
|
# In the case of a network host, these interfaces
|
|
# act as gateway/dhcp/vpn/etc. endpoints not VM interfaces.
|
|
interface_driver = None
|
|
|
|
|
|
def _get_interface_driver():
|
|
global interface_driver
|
|
if not interface_driver:
|
|
interface_driver = importutils.import_object(
|
|
CONF.linuxnet_interface_driver)
|
|
return interface_driver
|
|
|
|
|
|
def plug(network, mac_address, gateway=True):
|
|
return _get_interface_driver().plug(network, mac_address, gateway)
|
|
|
|
|
|
def unplug(network):
|
|
return _get_interface_driver().unplug(network)
|
|
|
|
|
|
def get_dev(network):
|
|
return _get_interface_driver().get_dev(network)
|
|
|
|
|
|
class LinuxNetInterfaceDriver(object):
|
|
"""Abstract class that defines generic network host API
|
|
for all Linux interface drivers.
|
|
"""
|
|
|
|
def plug(self, network, mac_address):
|
|
"""Create Linux device, return device name."""
|
|
raise NotImplementedError()
|
|
|
|
def unplug(self, network):
|
|
"""Destroy Linux device, return device name."""
|
|
raise NotImplementedError()
|
|
|
|
def get_dev(self, network):
|
|
"""Get device name."""
|
|
raise NotImplementedError()
|
|
|
|
|
|
# plugs interfaces using Linux Bridge
|
|
class LinuxBridgeInterfaceDriver(LinuxNetInterfaceDriver):
|
|
|
|
def plug(self, network, mac_address, gateway=True):
|
|
vlan = network.get('vlan')
|
|
if vlan is not None:
|
|
iface = CONF.vlan_interface or network['bridge_interface']
|
|
LinuxBridgeInterfaceDriver.ensure_vlan_bridge(
|
|
vlan,
|
|
network['bridge'],
|
|
iface,
|
|
network,
|
|
mac_address,
|
|
network.get('mtu'))
|
|
iface = 'vlan%s' % vlan
|
|
else:
|
|
iface = CONF.flat_interface or network['bridge_interface']
|
|
LinuxBridgeInterfaceDriver.ensure_bridge(
|
|
network['bridge'],
|
|
iface,
|
|
network, gateway)
|
|
|
|
if network['share_address'] or CONF.share_dhcp_address:
|
|
isolate_dhcp_address(iface, network['dhcp_server'])
|
|
# NOTE(vish): applying here so we don't get a lock conflict
|
|
iptables_manager.apply()
|
|
return network['bridge']
|
|
|
|
def unplug(self, network, gateway=True):
|
|
vlan = network.get('vlan')
|
|
if vlan is not None:
|
|
iface = 'vlan%s' % vlan
|
|
LinuxBridgeInterfaceDriver.remove_vlan_bridge(vlan,
|
|
network['bridge'])
|
|
else:
|
|
iface = CONF.flat_interface or network['bridge_interface']
|
|
LinuxBridgeInterfaceDriver.remove_bridge(network['bridge'],
|
|
gateway)
|
|
|
|
if network['share_address'] or CONF.share_dhcp_address:
|
|
remove_isolate_dhcp_address(iface, network['dhcp_server'])
|
|
|
|
iptables_manager.apply()
|
|
return self.get_dev(network)
|
|
|
|
def get_dev(self, network):
|
|
return network['bridge']
|
|
|
|
@staticmethod
|
|
def ensure_vlan_bridge(vlan_num, bridge, bridge_interface,
|
|
net_attrs=None, mac_address=None,
|
|
mtu=None):
|
|
"""Create a vlan and bridge unless they already exist."""
|
|
interface = LinuxBridgeInterfaceDriver.ensure_vlan(vlan_num,
|
|
bridge_interface, mac_address,
|
|
mtu)
|
|
LinuxBridgeInterfaceDriver.ensure_bridge(bridge, interface, net_attrs)
|
|
return interface
|
|
|
|
@staticmethod
|
|
def remove_vlan_bridge(vlan_num, bridge):
|
|
"""Delete a bridge and vlan."""
|
|
LinuxBridgeInterfaceDriver.remove_bridge(bridge)
|
|
LinuxBridgeInterfaceDriver.remove_vlan(vlan_num)
|
|
|
|
@staticmethod
|
|
@utils.synchronized('lock_vlan', external=True)
|
|
def ensure_vlan(vlan_num, bridge_interface, mac_address=None, mtu=None,
|
|
interface=None):
|
|
"""Create a vlan unless it already exists."""
|
|
if interface is None:
|
|
interface = 'vlan%s' % vlan_num
|
|
if not device_exists(interface):
|
|
LOG.debug('Starting VLAN interface %s', interface)
|
|
_execute('ip', 'link', 'add', 'link', bridge_interface,
|
|
'name', interface, 'type', 'vlan',
|
|
'id', vlan_num, run_as_root=True,
|
|
check_exit_code=[0, 2, 254])
|
|
# (danwent) the bridge will inherit this address, so we want to
|
|
# make sure it is the value set from the NetworkManager
|
|
if mac_address:
|
|
_execute('ip', 'link', 'set', interface, 'address',
|
|
mac_address, run_as_root=True,
|
|
check_exit_code=[0, 2, 254])
|
|
_execute('ip', 'link', 'set', interface, 'up', run_as_root=True,
|
|
check_exit_code=[0, 2, 254])
|
|
# NOTE(vish): set mtu every time to ensure that changes to mtu get
|
|
# propagated
|
|
_set_device_mtu(interface, mtu)
|
|
return interface
|
|
|
|
@staticmethod
|
|
@utils.synchronized('lock_vlan', external=True)
|
|
def remove_vlan(vlan_num):
|
|
"""Delete a vlan."""
|
|
vlan_interface = 'vlan%s' % vlan_num
|
|
delete_net_dev(vlan_interface)
|
|
|
|
@staticmethod
|
|
@utils.synchronized('lock_bridge', external=True)
|
|
def ensure_bridge(bridge, interface, net_attrs=None, gateway=True,
|
|
filtering=True):
|
|
"""Create a bridge unless it already exists.
|
|
|
|
:param interface: the interface to create the bridge on.
|
|
:param net_attrs: dictionary with attributes used to create bridge.
|
|
:param gateway: whether or not the bridge is a gateway.
|
|
:param filtering: whether or not to create filters on the bridge.
|
|
|
|
If net_attrs is set, it will add the net_attrs['gateway'] to the bridge
|
|
using net_attrs['broadcast'] and net_attrs['cidr']. It will also add
|
|
the ip_v6 address specified in net_attrs['cidr_v6'] if use_ipv6 is set.
|
|
|
|
The code will attempt to move any IPs that already exist on the
|
|
interface onto the bridge and reset the default gateway if necessary.
|
|
|
|
"""
|
|
if not device_exists(bridge):
|
|
LOG.debug('Starting Bridge %s', bridge)
|
|
out, err = _execute('brctl', 'addbr', bridge,
|
|
check_exit_code=False, run_as_root=True)
|
|
if (err and err != "device %s already exists; can't create "
|
|
"bridge with the same name\n" % (bridge)):
|
|
msg = _('Failed to add bridge: %s') % err
|
|
raise exception.NovaException(msg)
|
|
|
|
_execute('brctl', 'setfd', bridge, 0, run_as_root=True)
|
|
# _execute('brctl setageing %s 10' % bridge, run_as_root=True)
|
|
_execute('brctl', 'stp', bridge, 'off', run_as_root=True)
|
|
_execute('ip', 'link', 'set', bridge, 'up', run_as_root=True)
|
|
|
|
if interface:
|
|
LOG.debug('Adding interface %(interface)s to bridge %(bridge)s',
|
|
{'interface': interface, 'bridge': bridge})
|
|
out, err = _execute('brctl', 'addif', bridge, interface,
|
|
check_exit_code=False, run_as_root=True)
|
|
if (err and err != "device %s is already a member of a bridge; "
|
|
"can't enslave it to bridge %s.\n" % (interface, bridge)):
|
|
msg = _('Failed to add interface: %s') % err
|
|
raise exception.NovaException(msg)
|
|
|
|
# NOTE(apmelton): Linux bridge's default behavior is to use the
|
|
# lowest mac of all plugged interfaces. This isn't a problem when
|
|
# it is first created and the only interface is the bridged
|
|
# interface. But, as instance interfaces are plugged, there is a
|
|
# chance for the mac to change. So, set it here so that it won't
|
|
# change in the future.
|
|
if not CONF.fake_network:
|
|
interface_addrs = netifaces.ifaddresses(interface)
|
|
interface_mac = interface_addrs[netifaces.AF_LINK][0]['addr']
|
|
_execute('ip', 'link', 'set', bridge, 'address', interface_mac,
|
|
run_as_root=True)
|
|
|
|
out, err = _execute('ip', 'link', 'set', interface, 'up',
|
|
check_exit_code=False, run_as_root=True)
|
|
|
|
# NOTE(vish): This will break if there is already an ip on the
|
|
# interface, so we move any ips to the bridge
|
|
# NOTE(danms): We also need to copy routes to the bridge so as
|
|
# not to break existing connectivity on the interface
|
|
old_routes = []
|
|
out, err = _execute('ip', 'route', 'show', 'dev', interface)
|
|
for line in out.split('\n'):
|
|
fields = line.split()
|
|
if fields and 'via' in fields:
|
|
old_routes.append(fields)
|
|
_execute('ip', 'route', 'del', *fields,
|
|
run_as_root=True)
|
|
out, err = _execute('ip', 'addr', 'show', 'dev', interface,
|
|
'scope', 'global')
|
|
for line in out.split('\n'):
|
|
fields = line.split()
|
|
if fields and fields[0] == 'inet':
|
|
if fields[-2] in ('secondary', 'dynamic', ):
|
|
params = fields[1:-2]
|
|
else:
|
|
params = fields[1:-1]
|
|
_execute(*_ip_bridge_cmd('del', params, fields[-1]),
|
|
run_as_root=True, check_exit_code=[0, 2, 254])
|
|
_execute(*_ip_bridge_cmd('add', params, bridge),
|
|
run_as_root=True, check_exit_code=[0, 2, 254])
|
|
for fields in old_routes:
|
|
_execute('ip', 'route', 'add', *fields,
|
|
run_as_root=True)
|
|
|
|
if filtering:
|
|
# Don't forward traffic unless we were told to be a gateway
|
|
ipv4_filter = iptables_manager.ipv4['filter']
|
|
if gateway:
|
|
for rule in get_gateway_rules(bridge):
|
|
ipv4_filter.add_rule(*rule)
|
|
else:
|
|
ipv4_filter.add_rule('FORWARD',
|
|
('--in-interface %s -j %s'
|
|
% (bridge, CONF.iptables_drop_action)))
|
|
ipv4_filter.add_rule('FORWARD',
|
|
('--out-interface %s -j %s'
|
|
% (bridge, CONF.iptables_drop_action)))
|
|
|
|
@staticmethod
|
|
@utils.synchronized('lock_bridge', external=True)
|
|
def remove_bridge(bridge, gateway=True, filtering=True):
|
|
"""Delete a bridge."""
|
|
if not device_exists(bridge):
|
|
return
|
|
else:
|
|
if filtering:
|
|
ipv4_filter = iptables_manager.ipv4['filter']
|
|
if gateway:
|
|
for rule in get_gateway_rules(bridge):
|
|
ipv4_filter.remove_rule(*rule)
|
|
else:
|
|
drop_actions = ['DROP']
|
|
if CONF.iptables_drop_action != 'DROP':
|
|
drop_actions.append(CONF.iptables_drop_action)
|
|
|
|
for drop_action in drop_actions:
|
|
ipv4_filter.remove_rule('FORWARD',
|
|
('--in-interface %s -j %s'
|
|
% (bridge, drop_action)))
|
|
ipv4_filter.remove_rule('FORWARD',
|
|
('--out-interface %s -j %s'
|
|
% (bridge, drop_action)))
|
|
delete_bridge_dev(bridge)
|
|
|
|
|
|
# NOTE(cfb): Fix for LP #1316621, #1501366.
|
|
# We call ebtables with --concurrent which causes ebtables to
|
|
# use a lock file to deal with concurrent calls. Since we can't
|
|
# be sure the libvirt also uses --concurrent we retry in a loop
|
|
# to be sure.
|
|
#
|
|
# ebtables doesn't implement a timeout and doesn't gracefully
|
|
# handle cleaning up a lock file if someone sends a SIGKILL to
|
|
# ebtables while its holding a lock. As a result we want to add
|
|
# a timeout to the ebtables calls but we first need to teach
|
|
# oslo_concurrency how to do that.
|
|
def _exec_ebtables(*cmd, **kwargs):
|
|
check_exit_code = kwargs.pop('check_exit_code', True)
|
|
|
|
# List of error strings to re-try.
|
|
retry_strings = (
|
|
'Multiple ebtables programs',
|
|
)
|
|
|
|
# We always try at least once
|
|
attempts = CONF.ebtables_exec_attempts
|
|
count = 1
|
|
while count <= attempts:
|
|
# Updated our counters if needed
|
|
sleep = CONF.ebtables_retry_interval * count
|
|
count += 1
|
|
# NOTE(cfb): ebtables reports all errors with a return code of 255.
|
|
# As such we can't know if we hit a locking error, or some
|
|
# other error (like a rule doesn't exist) so we have to
|
|
# to parse stderr.
|
|
try:
|
|
_execute(*cmd, check_exit_code=[0], **kwargs)
|
|
except processutils.ProcessExecutionError as exc:
|
|
# See if we can retry the error.
|
|
if any(error in exc.stderr for error in retry_strings):
|
|
if count > attempts and check_exit_code:
|
|
LOG.warning(_LW('%s failed. Not Retrying.'), ' '.join(cmd))
|
|
raise
|
|
else:
|
|
# We need to sleep a bit before retrying
|
|
LOG.warning(_LW("%(cmd)s failed. Sleeping %(time)s "
|
|
"seconds before retry."),
|
|
{'cmd': ' '.join(cmd), 'time': sleep})
|
|
time.sleep(sleep)
|
|
else:
|
|
# Not eligible for retry
|
|
if check_exit_code:
|
|
LOG.warning(_LW('%s failed. Not Retrying.'), ' '.join(cmd))
|
|
raise
|
|
else:
|
|
return
|
|
else:
|
|
# Success
|
|
return
|
|
|
|
|
|
@utils.synchronized('ebtables', external=True)
|
|
def ensure_ebtables_rules(rules, table='filter'):
|
|
for rule in rules:
|
|
cmd = ['ebtables', '--concurrent', '-t', table, '-D'] + rule.split()
|
|
_exec_ebtables(*cmd, check_exit_code=False, run_as_root=True)
|
|
cmd[4] = '-I'
|
|
_exec_ebtables(*cmd, run_as_root=True)
|
|
|
|
|
|
@utils.synchronized('ebtables', external=True)
|
|
def remove_ebtables_rules(rules, table='filter'):
|
|
for rule in rules:
|
|
cmd = ['ebtables', '--concurrent', '-t', table, '-D'] + rule.split()
|
|
_exec_ebtables(*cmd, check_exit_code=False, run_as_root=True)
|
|
|
|
|
|
def isolate_dhcp_address(interface, address):
|
|
# block arp traffic to address across the interface
|
|
rules = []
|
|
rules.append('INPUT -p ARP -i %s --arp-ip-dst %s -j DROP'
|
|
% (interface, address))
|
|
rules.append('OUTPUT -p ARP -o %s --arp-ip-src %s -j DROP'
|
|
% (interface, address))
|
|
rules.append('FORWARD -p IPv4 -i %s --ip-protocol udp '
|
|
'--ip-destination-port 67:68 -j DROP'
|
|
% interface)
|
|
rules.append('FORWARD -p IPv4 -o %s --ip-protocol udp '
|
|
'--ip-destination-port 67:68 -j DROP'
|
|
% interface)
|
|
# NOTE(vish): the above is not possible with iptables/arptables
|
|
ensure_ebtables_rules(rules)
|
|
|
|
|
|
def remove_isolate_dhcp_address(interface, address):
|
|
# block arp traffic to address across the interface
|
|
rules = []
|
|
rules.append('INPUT -p ARP -i %s --arp-ip-dst %s -j DROP'
|
|
% (interface, address))
|
|
rules.append('OUTPUT -p ARP -o %s --arp-ip-src %s -j DROP'
|
|
% (interface, address))
|
|
rules.append('FORWARD -p IPv4 -i %s --ip-protocol udp '
|
|
'--ip-destination-port 67:68 -j DROP'
|
|
% interface)
|
|
rules.append('FORWARD -p IPv4 -o %s --ip-protocol udp '
|
|
'--ip-destination-port 67:68 -j DROP'
|
|
% interface)
|
|
remove_ebtables_rules(rules)
|
|
# NOTE(vish): the above is not possible with iptables/arptables
|
|
|
|
|
|
def get_gateway_rules(bridge):
|
|
interfaces = CONF.forward_bridge_interface
|
|
if 'all' in interfaces:
|
|
return [('FORWARD', '-i %s -j ACCEPT' % bridge),
|
|
('FORWARD', '-o %s -j ACCEPT' % bridge)]
|
|
rules = []
|
|
for iface in CONF.forward_bridge_interface:
|
|
if iface:
|
|
rules.append(('FORWARD', '-i %s -o %s -j ACCEPT' % (bridge,
|
|
iface)))
|
|
rules.append(('FORWARD', '-i %s -o %s -j ACCEPT' % (iface,
|
|
bridge)))
|
|
rules.append(('FORWARD', '-i %s -o %s -j ACCEPT' % (bridge, bridge)))
|
|
rules.append(('FORWARD', '-i %s -j %s' % (bridge,
|
|
CONF.iptables_drop_action)))
|
|
rules.append(('FORWARD', '-o %s -j %s' % (bridge,
|
|
CONF.iptables_drop_action)))
|
|
return rules
|
|
|
|
|
|
# plugs interfaces using Open vSwitch
|
|
class LinuxOVSInterfaceDriver(LinuxNetInterfaceDriver):
|
|
|
|
def plug(self, network, mac_address, gateway=True):
|
|
dev = self.get_dev(network)
|
|
if not device_exists(dev):
|
|
bridge = CONF.linuxnet_ovs_integration_bridge
|
|
_ovs_vsctl(['--', '--may-exist', 'add-port', bridge, dev,
|
|
'--', 'set', 'Interface', dev, 'type=internal',
|
|
'--', 'set', 'Interface', dev,
|
|
'external-ids:iface-id=%s' % dev,
|
|
'--', 'set', 'Interface', dev,
|
|
'external-ids:iface-status=active',
|
|
'--', 'set', 'Interface', dev,
|
|
'external-ids:attached-mac=%s' % mac_address])
|
|
_execute('ip', 'link', 'set', dev, 'address', mac_address,
|
|
run_as_root=True)
|
|
_set_device_mtu(dev, network.get('mtu'))
|
|
_execute('ip', 'link', 'set', dev, 'up', run_as_root=True)
|
|
if not gateway:
|
|
# If we weren't instructed to act as a gateway then add the
|
|
# appropriate flows to block all non-dhcp traffic.
|
|
_execute('ovs-ofctl',
|
|
'add-flow', bridge, 'priority=1,actions=drop',
|
|
run_as_root=True)
|
|
_execute('ovs-ofctl', 'add-flow', bridge,
|
|
'udp,tp_dst=67,dl_dst=%s,priority=2,actions=normal' %
|
|
mac_address, run_as_root=True)
|
|
# .. and make sure iptbles won't forward it as well.
|
|
iptables_manager.ipv4['filter'].add_rule('FORWARD',
|
|
'--in-interface %s -j %s' % (bridge,
|
|
CONF.iptables_drop_action))
|
|
iptables_manager.ipv4['filter'].add_rule('FORWARD',
|
|
'--out-interface %s -j %s' % (bridge,
|
|
CONF.iptables_drop_action))
|
|
else:
|
|
for rule in get_gateway_rules(bridge):
|
|
iptables_manager.ipv4['filter'].add_rule(*rule)
|
|
|
|
return dev
|
|
|
|
def unplug(self, network):
|
|
dev = self.get_dev(network)
|
|
bridge = CONF.linuxnet_ovs_integration_bridge
|
|
_ovs_vsctl(['--', '--if-exists', 'del-port', bridge, dev])
|
|
return dev
|
|
|
|
def get_dev(self, network):
|
|
dev = 'gw-' + str(network['uuid'][0:11])
|
|
return dev
|
|
|
|
|
|
# plugs interfaces using Linux Bridge when using NeutronManager
|
|
class NeutronLinuxBridgeInterfaceDriver(LinuxNetInterfaceDriver):
|
|
|
|
BRIDGE_NAME_PREFIX = 'brq'
|
|
GATEWAY_INTERFACE_PREFIX = 'gw-'
|
|
|
|
def plug(self, network, mac_address, gateway=True):
|
|
dev = self.get_dev(network)
|
|
bridge = self.get_bridge(network)
|
|
if not gateway:
|
|
# If we weren't instructed to act as a gateway then add the
|
|
# appropriate flows to block all non-dhcp traffic.
|
|
# .. and make sure iptbles won't forward it as well.
|
|
iptables_manager.ipv4['filter'].add_rule('FORWARD',
|
|
('--in-interface %s -j %s'
|
|
% (bridge, CONF.iptables_drop_action)))
|
|
iptables_manager.ipv4['filter'].add_rule('FORWARD',
|
|
('--out-interface %s -j %s'
|
|
% (bridge, CONF.iptables_drop_action)))
|
|
return bridge
|
|
else:
|
|
for rule in get_gateway_rules(bridge):
|
|
iptables_manager.ipv4['filter'].add_rule(*rule)
|
|
|
|
create_tap_dev(dev, mac_address)
|
|
|
|
if not device_exists(bridge):
|
|
LOG.debug("Starting bridge %s ", bridge)
|
|
utils.execute('brctl', 'addbr', bridge, run_as_root=True)
|
|
utils.execute('brctl', 'setfd', bridge, str(0), run_as_root=True)
|
|
utils.execute('brctl', 'stp', bridge, 'off', run_as_root=True)
|
|
utils.execute('ip', 'link', 'set', bridge, 'address', mac_address,
|
|
run_as_root=True, check_exit_code=[0, 2, 254])
|
|
utils.execute('ip', 'link', 'set', bridge, 'up', run_as_root=True,
|
|
check_exit_code=[0, 2, 254])
|
|
LOG.debug("Done starting bridge %s", bridge)
|
|
|
|
full_ip = '%s/%s' % (network['dhcp_server'],
|
|
network['cidr'].rpartition('/')[2])
|
|
utils.execute('ip', 'address', 'add', full_ip, 'dev', bridge,
|
|
run_as_root=True, check_exit_code=[0, 2, 254])
|
|
|
|
return dev
|
|
|
|
def unplug(self, network):
|
|
dev = self.get_dev(network)
|
|
if not device_exists(dev):
|
|
return None
|
|
else:
|
|
delete_net_dev(dev)
|
|
return dev
|
|
|
|
def get_dev(self, network):
|
|
dev = self.GATEWAY_INTERFACE_PREFIX + str(network['uuid'][0:11])
|
|
return dev
|
|
|
|
def get_bridge(self, network):
|
|
bridge = self.BRIDGE_NAME_PREFIX + str(network['uuid'][0:11])
|
|
return bridge
|
|
|
|
|
|
iptables_manager = IptablesManager()
|
|
|
|
|
|
def set_vf_interface_vlan(pci_addr, mac_addr, vlan=0):
|
|
pf_ifname = pci_utils.get_ifname_by_pci_address(pci_addr,
|
|
pf_interface=True)
|
|
vf_ifname = pci_utils.get_ifname_by_pci_address(pci_addr)
|
|
vf_num = pci_utils.get_vf_num_by_pci_address(pci_addr)
|
|
|
|
# Set the VF's mac address and vlan
|
|
exit_code = [0, 2, 254]
|
|
port_state = 'up' if vlan > 0 else 'down'
|
|
utils.execute('ip', 'link', 'set', pf_ifname,
|
|
'vf', vf_num,
|
|
'mac', mac_addr,
|
|
'vlan', vlan,
|
|
run_as_root=True,
|
|
check_exit_code=exit_code)
|
|
# Bring up/down the VF's interface
|
|
# TODO(edand): The mac is assigned as a workaround for the following issue
|
|
# https://bugzilla.redhat.com/show_bug.cgi?id=1372944
|
|
# once resolved it will be removed
|
|
utils.execute('ip', 'link', 'set', vf_ifname,
|
|
'address', mac_addr,
|
|
port_state,
|
|
run_as_root=True,
|
|
check_exit_code=exit_code)
|