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-rw-r--r--build/neutron/agent/interface/interface.py552
-rw-r--r--build/neutron/agent/l3/namespaces.py142
-rw-r--r--build/neutron/agent/l3/router_info.py996
3 files changed, 0 insertions, 1690 deletions
diff --git a/build/neutron/agent/interface/interface.py b/build/neutron/agent/interface/interface.py
deleted file mode 100644
index 709fd67..0000000
--- a/build/neutron/agent/interface/interface.py
+++ /dev/null
@@ -1,552 +0,0 @@
-# Copyright 2012 OpenStack Foundation
-# All Rights Reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-# http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-
-import abc
-import eventlet
-import netaddr
-from oslo_config import cfg
-from oslo_log import log as logging
-import six
-
-from neutron._i18n import _, _LE, _LI, _LW
-from neutron.agent.common import ovs_lib
-from neutron.agent.linux import ip_lib
-from neutron.agent.linux import utils
-from neutron.common import constants as n_const
-from neutron.common import exceptions
-from neutron.common import ipv6_utils
-
-
-LOG = logging.getLogger(__name__)
-
-OPTS = [
- cfg.StrOpt('ovs_integration_bridge',
- default='br-int',
- help=_('Name of Open vSwitch bridge to use')),
- cfg.BoolOpt('ovs_use_veth',
- default=False,
- help=_('Uses veth for an OVS interface or not. '
- 'Support kernels with limited namespace support '
- '(e.g. RHEL 6.5) so long as ovs_use_veth is set to '
- 'True.')),
- cfg.IntOpt('network_device_mtu',
- deprecated_for_removal=True,
- help=_('MTU setting for device. This option will be removed in '
- 'Newton. Please use the system-wide segment_mtu setting '
- 'which the agents will take into account when wiring '
- 'VIFs.')),
-]
-
-
-@six.add_metaclass(abc.ABCMeta)
-class LinuxInterfaceDriver(object):
-
- # from linux IF_NAMESIZE
- DEV_NAME_LEN = 14
- DEV_NAME_PREFIX = n_const.TAP_DEVICE_PREFIX
-
- def __init__(self, conf):
- self.conf = conf
- if self.conf.network_device_mtu:
- self._validate_network_device_mtu()
-
- def _validate_network_device_mtu(self):
- if (ipv6_utils.is_enabled() and
- self.conf.network_device_mtu < n_const.IPV6_MIN_MTU):
- LOG.error(_LE("IPv6 protocol requires a minimum MTU of "
- "%(min_mtu)s, while the configured value is "
- "%(current_mtu)s"), {'min_mtu': n_const.IPV6_MIN_MTU,
- 'current_mtu': self.conf.network_device_mtu})
- raise SystemExit(1)
-
- @property
- def use_gateway_ips(self):
- """Whether to use gateway IPs instead of unique IP allocations.
-
- In each place where the DHCP agent runs, and for each subnet for
- which DHCP is handling out IP addresses, the DHCP port needs -
- at the Linux level - to have an IP address within that subnet.
- Generally this needs to be a unique Neutron-allocated IP
- address, because the subnet's underlying L2 domain is bridged
- across multiple compute hosts and network nodes, and for HA
- there may be multiple DHCP agents running on that same bridged
- L2 domain.
-
- However, if the DHCP ports - on multiple compute/network nodes
- but for the same network - are _not_ bridged to each other,
- they do not need each to have a unique IP address. Instead
- they can all share the same address from the relevant subnet.
- This works, without creating any ambiguity, because those
- ports are not all present on the same L2 domain, and because
- no data within the network is ever sent to that address.
- (DHCP requests are broadcast, and it is the network's job to
- ensure that such a broadcast will reach at least one of the
- available DHCP servers. DHCP responses will be sent _from_
- the DHCP port address.)
-
- Specifically, for networking backends where it makes sense,
- the DHCP agent allows all DHCP ports to use the subnet's
- gateway IP address, and thereby to completely avoid any unique
- IP address allocation. This behaviour is selected by running
- the DHCP agent with a configured interface driver whose
- 'use_gateway_ips' property is True.
-
- When an operator deploys Neutron with an interface driver that
- makes use_gateway_ips True, they should also ensure that a
- gateway IP address is defined for each DHCP-enabled subnet,
- and that the gateway IP address doesn't change during the
- subnet's lifetime.
- """
- return False
-
- def init_l3(self, device_name, ip_cidrs, namespace=None,
- preserve_ips=None, clean_connections=False):
- """Set the L3 settings for the interface using data from the port.
-
- ip_cidrs: list of 'X.X.X.X/YY' strings
- preserve_ips: list of ip cidrs that should not be removed from device
- clean_connections: Boolean to indicate if we should cleanup connections
- associated to removed ips
- """
- preserve_ips = preserve_ips or []
- device = ip_lib.IPDevice(device_name, namespace=namespace)
-
- # The LLA generated by the operating system is not known to
- # Neutron, so it would be deleted if we added it to the 'previous'
- # list here
- default_ipv6_lla = ip_lib.get_ipv6_lladdr(device.link.address)
- previous = {addr['cidr'] for addr in device.addr.list(
- filters=['permanent'])} - {default_ipv6_lla}
-
- # add new addresses
- for ip_cidr in ip_cidrs:
-
- net = netaddr.IPNetwork(ip_cidr)
- # Convert to compact IPv6 address because the return values of
- # "ip addr list" are compact.
- if net.version == 6:
- ip_cidr = str(net)
- if ip_cidr in previous:
- previous.remove(ip_cidr)
- continue
-
- device.addr.add(ip_cidr)
-
- # clean up any old addresses
- for ip_cidr in previous:
- if ip_cidr not in preserve_ips:
- if clean_connections:
- device.delete_addr_and_conntrack_state(ip_cidr)
- else:
- device.addr.delete(ip_cidr)
-
- def init_router_port(self,
- device_name,
- ip_cidrs,
- namespace,
- preserve_ips=None,
- extra_subnets=None,
- clean_connections=False):
- """Set the L3 settings for a router interface using data from the port.
-
- ip_cidrs: list of 'X.X.X.X/YY' strings
- preserve_ips: list of ip cidrs that should not be removed from device
- clean_connections: Boolean to indicate if we should cleanup connections
- associated to removed ips
- extra_subnets: An iterable of cidrs to add as routes without address
- """
- LOG.debug("init_router_port: device_name(%s), namespace(%s)",
- device_name, namespace)
- self.init_l3(device_name=device_name,
- ip_cidrs=ip_cidrs,
- namespace=namespace,
- preserve_ips=preserve_ips or [],
- clean_connections=clean_connections)
-
- device = ip_lib.IPDevice(device_name, namespace=namespace)
-
- # Manage on-link routes (routes without an associated address)
- new_onlink_cidrs = set(s['cidr'] for s in extra_subnets or [])
-
- v4_onlink = device.route.list_onlink_routes(n_const.IP_VERSION_4)
- v6_onlink = device.route.list_onlink_routes(n_const.IP_VERSION_6)
- existing_onlink_cidrs = set(r['cidr'] for r in v4_onlink + v6_onlink)
-
- for route in new_onlink_cidrs - existing_onlink_cidrs:
- LOG.debug("adding onlink route(%s)", route)
- device.route.add_onlink_route(route)
- for route in (existing_onlink_cidrs - new_onlink_cidrs -
- set(preserve_ips or [])):
- LOG.debug("deleting onlink route(%s)", route)
- device.route.delete_onlink_route(route)
-
- def add_ipv6_addr(self, device_name, v6addr, namespace, scope='global'):
- device = ip_lib.IPDevice(device_name,
- namespace=namespace)
- net = netaddr.IPNetwork(v6addr)
- device.addr.add(str(net), scope)
-
- def delete_ipv6_addr(self, device_name, v6addr, namespace):
- device = ip_lib.IPDevice(device_name,
- namespace=namespace)
- device.delete_addr_and_conntrack_state(v6addr)
-
- def delete_ipv6_addr_with_prefix(self, device_name, prefix, namespace):
- """Delete the first listed IPv6 address that falls within a given
- prefix.
- """
- device = ip_lib.IPDevice(device_name, namespace=namespace)
- net = netaddr.IPNetwork(prefix)
- for address in device.addr.list(scope='global', filters=['permanent']):
- ip_address = netaddr.IPNetwork(address['cidr'])
- if ip_address in net:
- device.delete_addr_and_conntrack_state(address['cidr'])
- break
-
- def get_ipv6_llas(self, device_name, namespace):
- device = ip_lib.IPDevice(device_name,
- namespace=namespace)
-
- return device.addr.list(scope='link', ip_version=6)
-
- def check_bridge_exists(self, bridge):
- if not ip_lib.device_exists(bridge):
- raise exceptions.BridgeDoesNotExist(bridge=bridge)
-
- def get_device_name(self, port):
- return (self.DEV_NAME_PREFIX + port.id)[:self.DEV_NAME_LEN]
-
- @staticmethod
- def configure_ipv6_ra(namespace, dev_name):
- """Configure acceptance of IPv6 route advertisements on an intf."""
- # Learn the default router's IP address via RAs
- ip_lib.IPWrapper(namespace=namespace).netns.execute(
- ['sysctl', '-w', 'net.ipv6.conf.%s.accept_ra=2' % dev_name])
-
- @abc.abstractmethod
- def plug_new(self, network_id, port_id, device_name, mac_address,
- bridge=None, namespace=None, prefix=None, mtu=None):
- """Plug in the interface only for new devices that don't exist yet."""
-
- def plug(self, network_id, port_id, device_name, mac_address,
- bridge=None, namespace=None, prefix=None, mtu=None):
- if not ip_lib.device_exists(device_name,
- namespace=namespace):
- try:
- self.plug_new(network_id, port_id, device_name, mac_address,
- bridge, namespace, prefix, mtu)
- except TypeError:
- self.plug_new(network_id, port_id, device_name, mac_address,
- bridge, namespace, prefix)
- else:
- LOG.info(_LI("Device %s already exists"), device_name)
-
- @abc.abstractmethod
- def unplug(self, device_name, bridge=None, namespace=None, prefix=None):
- """Unplug the interface."""
-
- @property
- def bridged(self):
- """Whether the DHCP port is bridged to the VM TAP interfaces.
-
- When the DHCP port is bridged to the TAP interfaces for the
- VMs for which it is providing DHCP service - as is the case
- for most Neutron network implementations - the DHCP server
- only needs to listen on the DHCP port, and will still receive
- DHCP requests from all the relevant VMs.
-
- If the DHCP port is not bridged to the relevant VM TAP
- interfaces, the DHCP server needs to listen explicitly on
- those TAP interfaces, and to treat those as aliases of the
- DHCP port where the IP subnet is defined.
- """
- return True
-
-
-class NullDriver(LinuxInterfaceDriver):
- def plug_new(self, network_id, port_id, device_name, mac_address,
- bridge=None, namespace=None, prefix=None, mtu=None):
- pass
-
- def unplug(self, device_name, bridge=None, namespace=None, prefix=None):
- pass
-
-class NSDriver(LinuxInterfaceDriver):
- """Device independent driver enabling creation of a non device specific
- interface in network spaces. Attachment to the device is not performed.
- """
- MAX_TIME_FOR_DEVICE_EXISTENCE = 30
-
- @classmethod
- def _device_is_created_in_time(cls, device_name):
- """See if device is created, within time limit."""
- attempt = 0
- while attempt < NSDriver.MAX_TIME_FOR_DEVICE_EXISTENCE:
- if ip_lib.device_exists(device_name):
- return True
- attempt += 1
- eventlet.sleep(1)
- LOG.error(_LE("Device %(dev)s was not created in %(time)d seconds"),
- {'dev': device_name,
- 'time': NSDriver.MAX_TIME_FOR_DEVICE_EXISTENCE})
- return False
-
- def _configure_mtu(self, ns_dev, mtu=None):
- # Need to set MTU, after added to namespace. See review
- # https://review.openstack.org/327651
- try:
- # Note: network_device_mtu will be deprecated in future
- mtu_override = self.conf.network_device_mtu
- except cfg.NoSuchOptError:
- LOG.warning(_LW("Config setting for MTU deprecated - any "
- "override will be ignored."))
- mtu_override = None
- if mtu_override:
- mtu = mtu_override
- LOG.debug("Overriding MTU to %d", mtu)
- if mtu:
- ns_dev.link.set_mtu(mtu)
- else:
- LOG.debug("No MTU provided - skipping setting value")
-
- def plug(self, network_id, port_id, device_name, mac_address,
- bridge=None, namespace=None, prefix=None, mtu=None):
-
- # Overriding this, we still want to add an existing device into the
- # namespace.
- self.plug_new(network_id, port_id, device_name, mac_address,
- bridge, namespace, prefix, mtu)
-
- def plug_new(self, network_id, port_id, device_name, mac_address,
- bridge=None, namespace=None, prefix=None, mtu=None):
-
- ip = ip_lib.IPWrapper()
- ns_dev = ip.device(device_name)
-
- LOG.debug("Plugging dev: '%s' into namespace: '%s' ",
- device_name, namespace)
-
- # Wait for device creation
- if not self._device_is_created_in_time(device_name):
- return
-
- ns_dev.link.set_address(mac_address)
-
- if namespace:
- namespace_obj = ip.ensure_namespace(namespace)
- namespace_obj.add_device_to_namespace(ns_dev)
-
- self._configure_mtu(ns_dev, mtu)
-
- ns_dev.link.set_up()
-
- def unplug(self, device_name, bridge=None, namespace=None, prefix=None):
- # Device removal is done externally. Just remove the namespace
- LOG.debug("Removing namespace: '%s'", namespace)
- ip_lib.IPWrapper(namespace).garbage_collect_namespace()
-
-
-class OVSInterfaceDriver(LinuxInterfaceDriver):
- """Driver for creating an internal interface on an OVS bridge."""
-
- DEV_NAME_PREFIX = n_const.TAP_DEVICE_PREFIX
-
- def __init__(self, conf):
- super(OVSInterfaceDriver, self).__init__(conf)
- if self.conf.ovs_use_veth:
- self.DEV_NAME_PREFIX = 'ns-'
-
- def _get_tap_name(self, dev_name, prefix=None):
- if self.conf.ovs_use_veth:
- dev_name = dev_name.replace(prefix or self.DEV_NAME_PREFIX,
- n_const.TAP_DEVICE_PREFIX)
- return dev_name
-
- def _ovs_add_port(self, bridge, device_name, port_id, mac_address,
- internal=True):
- attrs = [('external_ids', {'iface-id': port_id,
- 'iface-status': 'active',
- 'attached-mac': mac_address})]
- if internal:
- attrs.insert(0, ('type', 'internal'))
-
- ovs = ovs_lib.OVSBridge(bridge)
- ovs.replace_port(device_name, *attrs)
-
- def plug_new(self, network_id, port_id, device_name, mac_address,
- bridge=None, namespace=None, prefix=None, mtu=None):
- """Plug in the interface."""
- if not bridge:
- bridge = self.conf.ovs_integration_bridge
-
- self.check_bridge_exists(bridge)
-
- ip = ip_lib.IPWrapper()
- tap_name = self._get_tap_name(device_name, prefix)
-
- if self.conf.ovs_use_veth:
- # Create ns_dev in a namespace if one is configured.
- root_dev, ns_dev = ip.add_veth(tap_name,
- device_name,
- namespace2=namespace)
- root_dev.disable_ipv6()
- else:
- ns_dev = ip.device(device_name)
-
- internal = not self.conf.ovs_use_veth
- self._ovs_add_port(bridge, tap_name, port_id, mac_address,
- internal=internal)
-
- ns_dev.link.set_address(mac_address)
-
- # Add an interface created by ovs to the namespace.
- if not self.conf.ovs_use_veth and namespace:
- namespace_obj = ip.ensure_namespace(namespace)
- namespace_obj.add_device_to_namespace(ns_dev)
-
- # NOTE(ihrachys): the order here is significant: we must set MTU after
- # the device is moved into a namespace, otherwise OVS bridge does not
- # allow to set MTU that is higher than the least of all device MTUs on
- # the bridge
- mtu = self.conf.network_device_mtu or mtu
- if mtu:
- ns_dev.link.set_mtu(mtu)
- if self.conf.ovs_use_veth:
- root_dev.link.set_mtu(mtu)
- else:
- LOG.warning(_LW("No MTU configured for port %s"), port_id)
-
- ns_dev.link.set_up()
- if self.conf.ovs_use_veth:
- root_dev.link.set_up()
-
- def unplug(self, device_name, bridge=None, namespace=None, prefix=None):
- """Unplug the interface."""
- if not bridge:
- bridge = self.conf.ovs_integration_bridge
-
- tap_name = self._get_tap_name(device_name, prefix)
- self.check_bridge_exists(bridge)
- ovs = ovs_lib.OVSBridge(bridge)
-
- try:
- ovs.delete_port(tap_name)
- if self.conf.ovs_use_veth:
- device = ip_lib.IPDevice(device_name, namespace=namespace)
- device.link.delete()
- LOG.debug("Unplugged interface '%s'", device_name)
- except RuntimeError:
- LOG.error(_LE("Failed unplugging interface '%s'"),
- device_name)
-
-
-class IVSInterfaceDriver(LinuxInterfaceDriver):
- """Driver for creating an internal interface on an IVS bridge."""
-
- DEV_NAME_PREFIX = n_const.TAP_DEVICE_PREFIX
-
- def __init__(self, conf):
- super(IVSInterfaceDriver, self).__init__(conf)
- self.DEV_NAME_PREFIX = 'ns-'
-
- def _get_tap_name(self, dev_name, prefix=None):
- dev_name = dev_name.replace(prefix or self.DEV_NAME_PREFIX,
- n_const.TAP_DEVICE_PREFIX)
- return dev_name
-
- def _ivs_add_port(self, device_name, port_id, mac_address):
- cmd = ['ivs-ctl', 'add-port', device_name]
- utils.execute(cmd, run_as_root=True)
-
- def plug_new(self, network_id, port_id, device_name, mac_address,
- bridge=None, namespace=None, prefix=None, mtu=None):
- """Plug in the interface."""
- ip = ip_lib.IPWrapper()
- tap_name = self._get_tap_name(device_name, prefix)
-
- root_dev, ns_dev = ip.add_veth(tap_name, device_name)
- root_dev.disable_ipv6()
-
- self._ivs_add_port(tap_name, port_id, mac_address)
-
- ns_dev = ip.device(device_name)
- ns_dev.link.set_address(mac_address)
-
- mtu = self.conf.network_device_mtu or mtu
- if mtu:
- ns_dev.link.set_mtu(mtu)
- root_dev.link.set_mtu(mtu)
- else:
- LOG.warning(_LW("No MTU configured for port %s"), port_id)
-
- if namespace:
- namespace_obj = ip.ensure_namespace(namespace)
- namespace_obj.add_device_to_namespace(ns_dev)
-
- ns_dev.link.set_up()
- root_dev.link.set_up()
-
- def unplug(self, device_name, bridge=None, namespace=None, prefix=None):
- """Unplug the interface."""
- tap_name = self._get_tap_name(device_name, prefix)
- try:
- cmd = ['ivs-ctl', 'del-port', tap_name]
- utils.execute(cmd, run_as_root=True)
- device = ip_lib.IPDevice(device_name, namespace=namespace)
- device.link.delete()
- LOG.debug("Unplugged interface '%s'", device_name)
- except RuntimeError:
- LOG.error(_LE("Failed unplugging interface '%s'"),
- device_name)
-
-
-class BridgeInterfaceDriver(LinuxInterfaceDriver):
- """Driver for creating bridge interfaces."""
-
- DEV_NAME_PREFIX = 'ns-'
-
- def plug_new(self, network_id, port_id, device_name, mac_address,
- bridge=None, namespace=None, prefix=None, mtu=None):
- """Plugin the interface."""
- ip = ip_lib.IPWrapper()
-
- # Enable agent to define the prefix
- tap_name = device_name.replace(prefix or self.DEV_NAME_PREFIX,
- n_const.TAP_DEVICE_PREFIX)
- # Create ns_veth in a namespace if one is configured.
- root_veth, ns_veth = ip.add_veth(tap_name, device_name,
- namespace2=namespace)
- root_veth.disable_ipv6()
- ns_veth.link.set_address(mac_address)
-
- mtu = self.conf.network_device_mtu or mtu
- if mtu:
- root_veth.link.set_mtu(mtu)
- ns_veth.link.set_mtu(mtu)
- else:
- LOG.warning(_LW("No MTU configured for port %s"), port_id)
-
- root_veth.link.set_up()
- ns_veth.link.set_up()
-
- def unplug(self, device_name, bridge=None, namespace=None, prefix=None):
- """Unplug the interface."""
- device = ip_lib.IPDevice(device_name, namespace=namespace)
- try:
- device.link.delete()
- LOG.debug("Unplugged interface '%s'", device_name)
- except RuntimeError:
- LOG.error(_LE("Failed unplugging interface '%s'"),
- device_name)
diff --git a/build/neutron/agent/l3/namespaces.py b/build/neutron/agent/l3/namespaces.py
deleted file mode 100644
index aa28205..0000000
--- a/build/neutron/agent/l3/namespaces.py
+++ /dev/null
@@ -1,142 +0,0 @@
-# Copyright 2015 Hewlett-Packard Development Company, L.P.
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-# http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-#
-
-import functools
-
-from oslo_log import log as logging
-from oslo_utils import excutils
-
-from neutron.agent.linux.interface import OVSInterfaceDriver
-from neutron._i18n import _LE, _LW
-from neutron.agent.linux import ip_lib
-
-LOG = logging.getLogger(__name__)
-
-NS_PREFIX = 'qrouter-'
-INTERNAL_DEV_PREFIX = 'qr-'
-EXTERNAL_DEV_PREFIX = 'qg-'
-# TODO(Carl) It is odd that this file needs this. It is a dvr detail.
-ROUTER_2_FIP_DEV_PREFIX = 'rfp-'
-
-
-def build_ns_name(prefix, identifier):
- """Builds a namespace name from the given prefix and identifier
-
- :param prefix: The prefix which must end with '-' for legacy reasons
- :param identifier: The id associated with the namespace
- """
- return prefix + identifier
-
-
-def get_prefix_from_ns_name(ns_name):
- """Parses prefix from prefix-identifier
-
- :param ns_name: The name of a namespace
- :returns: The prefix ending with a '-' or None if there is no '-'
- """
- dash_index = ns_name.find('-')
- if 0 <= dash_index:
- return ns_name[:dash_index + 1]
-
-
-def get_id_from_ns_name(ns_name):
- """Parses identifier from prefix-identifier
-
- :param ns_name: The name of a namespace
- :returns: Identifier or None if there is no - to end the prefix
- """
- dash_index = ns_name.find('-')
- if 0 <= dash_index:
- return ns_name[dash_index + 1:]
-
-
-def check_ns_existence(f):
- @functools.wraps(f)
- def wrapped(self, *args, **kwargs):
- if not self.exists():
- LOG.warning(_LW('Namespace %(name)s does not exists. Skipping '
- '%(func)s'),
- {'name': self.name, 'func': f.__name__})
- return
- try:
- return f(self, *args, **kwargs)
- except RuntimeError:
- with excutils.save_and_reraise_exception() as ctx:
- if not self.exists():
- LOG.debug('Namespace %(name)s was concurrently deleted',
- self.name)
- ctx.reraise = False
- return wrapped
-
-
-class Namespace(object):
-
- def __init__(self, name, agent_conf, driver, use_ipv6):
- self.name = name
- self.ip_wrapper_root = ip_lib.IPWrapper()
- self.agent_conf = agent_conf
- self.driver = driver
- self.use_ipv6 = use_ipv6
-
- def create(self):
- ip_wrapper = self.ip_wrapper_root.ensure_namespace(self.name)
- cmd = ['sysctl', '-w', 'net.ipv4.ip_forward=1']
- ip_wrapper.netns.execute(cmd)
- if self.use_ipv6:
- cmd = ['sysctl', '-w', 'net.ipv6.conf.all.forwarding=1']
- ip_wrapper.netns.execute(cmd)
-
- def delete(self):
- try:
- self.ip_wrapper_root.netns.delete(self.name)
- except RuntimeError:
- msg = _LE('Failed trying to delete namespace: %s')
- LOG.exception(msg, self.name)
-
- def exists(self):
- return self.ip_wrapper_root.netns.exists(self.name)
-
-
-class RouterNamespace(Namespace):
-
- def __init__(self, router_id, agent_conf, driver, use_ipv6, ovs_driver):
- self.router_id = router_id
- self.ovs_driver = ovs_driver
- name = self._get_ns_name(router_id)
- super(RouterNamespace, self).__init__(
- name, agent_conf, driver, use_ipv6)
-
- @classmethod
- def _get_ns_name(cls, router_id):
- return build_ns_name(NS_PREFIX, router_id)
-
- @check_ns_existence
- def delete(self):
- ns_ip = ip_lib.IPWrapper(namespace=self.name)
- for d in ns_ip.get_devices(exclude_loopback=True):
- if d.name.startswith(INTERNAL_DEV_PREFIX):
- # device is on default bridge
- self.driver.unplug(d.name, namespace=self.name,
- prefix=INTERNAL_DEV_PREFIX)
- elif d.name.startswith(ROUTER_2_FIP_DEV_PREFIX):
- ns_ip.del_veth(d.name)
- elif d.name.startswith(EXTERNAL_DEV_PREFIX):
- self.ovs_driver.unplug(
- d.name,
- bridge=self.agent_conf.external_network_bridge,
- namespace=self.name,
- prefix=EXTERNAL_DEV_PREFIX)
-
- super(RouterNamespace, self).delete()
diff --git a/build/neutron/agent/l3/router_info.py b/build/neutron/agent/l3/router_info.py
deleted file mode 100644
index 0ddd1db..0000000
--- a/build/neutron/agent/l3/router_info.py
+++ /dev/null
@@ -1,996 +0,0 @@
-# Copyright (c) 2014 OpenStack Foundation
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-# http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-
-import collections
-import netaddr
-from oslo_log import log as logging
-
-from neutron._i18n import _, _LE, _LW
-from neutron.agent.l3 import namespaces
-from neutron.agent.linux import ip_lib
-from neutron.agent.linux import iptables_manager
-from neutron.agent.linux import ra
-from neutron.common import constants as l3_constants
-from neutron.common import exceptions as n_exc
-from neutron.common import ipv6_utils
-from neutron.common import utils as common_utils
-from neutron.ipam import utils as ipam_utils
-from neutron.agent.linux.interface import OVSInterfaceDriver
-
-LOG = logging.getLogger(__name__)
-INTERNAL_DEV_PREFIX = namespaces.INTERNAL_DEV_PREFIX
-EXTERNAL_DEV_PREFIX = namespaces.EXTERNAL_DEV_PREFIX
-
-FLOATINGIP_STATUS_NOCHANGE = object()
-ADDRESS_SCOPE_MARK_MASK = "0xffff0000"
-ADDRESS_SCOPE_MARK_ID_MIN = 1024
-ADDRESS_SCOPE_MARK_ID_MAX = 2048
-DEFAULT_ADDRESS_SCOPE = "noscope"
-
-
-class RouterInfo(object):
-
- def __init__(self,
- router_id,
- router,
- agent_conf,
- interface_driver,
- use_ipv6=False):
- self.ovs_driver = OVSInterfaceDriver(agent_conf)
- self.router_id = router_id
- self.ex_gw_port = None
- self._snat_enabled = None
- self.fip_map = {}
- self.internal_ports = []
- self.floating_ips = set()
- # Invoke the setter for establishing initial SNAT action
- self.router = router
- self.use_ipv6 = use_ipv6
- ns = namespaces.RouterNamespace(
- router_id, agent_conf, interface_driver, use_ipv6, self.ovs_driver)
- self.router_namespace = ns
- self.ns_name = ns.name
- self.available_mark_ids = set(range(ADDRESS_SCOPE_MARK_ID_MIN,
- ADDRESS_SCOPE_MARK_ID_MAX))
- self._address_scope_to_mark_id = {
- DEFAULT_ADDRESS_SCOPE: self.available_mark_ids.pop()}
- self.iptables_manager = iptables_manager.IptablesManager(
- use_ipv6=use_ipv6,
- namespace=self.ns_name)
- self.routes = []
- self.agent_conf = agent_conf
- self.driver = interface_driver
- # radvd is a neutron.agent.linux.ra.DaemonMonitor
- self.radvd = None
-
- def initialize(self, process_monitor):
- """Initialize the router on the system.
-
- This differs from __init__ in that this method actually affects the
- system creating namespaces, starting processes, etc. The other merely
- initializes the python object. This separates in-memory object
- initialization from methods that actually go do stuff to the system.
-
- :param process_monitor: The agent's process monitor instance.
- """
- self.process_monitor = process_monitor
- self.radvd = ra.DaemonMonitor(self.router_id,
- self.ns_name,
- process_monitor,
- self.get_internal_device_name,
- self.agent_conf)
-
- self.router_namespace.create()
-
- @property
- def router(self):
- return self._router
-
- @router.setter
- def router(self, value):
- self._router = value
- if not self._router:
- return
- # enable_snat by default if it wasn't specified by plugin
- self._snat_enabled = self._router.get('enable_snat', True)
-
- def get_internal_device_name(self, port_id):
- return (INTERNAL_DEV_PREFIX + port_id)[:self.driver.DEV_NAME_LEN]
-
- def get_external_device_name(self, port_id):
- return (EXTERNAL_DEV_PREFIX + port_id)[:self.driver.DEV_NAME_LEN]
-
- def get_external_device_interface_name(self, ex_gw_port):
- return self.get_external_device_name(ex_gw_port['id'])
-
- def _update_routing_table(self, operation, route, namespace):
- cmd = ['ip', 'route', operation, 'to', route['destination'],
- 'via', route['nexthop']]
- ip_wrapper = ip_lib.IPWrapper(namespace=namespace)
- ip_wrapper.netns.execute(cmd, check_exit_code=False)
-
- def update_routing_table(self, operation, route):
- self._update_routing_table(operation, route, self.ns_name)
-
- def routes_updated(self, old_routes, new_routes):
- adds, removes = common_utils.diff_list_of_dict(old_routes,
- new_routes)
- for route in adds:
- LOG.debug("Added route entry is '%s'", route)
- # remove replaced route from deleted route
- for del_route in removes:
- if route['destination'] == del_route['destination']:
- removes.remove(del_route)
- #replace success even if there is no existing route
- self.update_routing_table('replace', route)
- for route in removes:
- LOG.debug("Removed route entry is '%s'", route)
- self.update_routing_table('delete', route)
-
- def get_ex_gw_port(self):
- return self.router.get('gw_port')
-
- def get_floating_ips(self):
- """Filter Floating IPs to be hosted on this agent."""
- return self.router.get(l3_constants.FLOATINGIP_KEY, [])
-
- def floating_forward_rules(self, floating_ip, fixed_ip):
- return [('PREROUTING', '-d %s/32 -j DNAT --to-destination %s' %
- (floating_ip, fixed_ip)),
- ('OUTPUT', '-d %s/32 -j DNAT --to-destination %s' %
- (floating_ip, fixed_ip)),
- ('float-snat', '-s %s/32 -j SNAT --to-source %s' %
- (fixed_ip, floating_ip))]
-
- def floating_mangle_rules(self, floating_ip, fixed_ip, internal_mark):
- mark_traffic_to_floating_ip = (
- 'floatingip', '-d %s -j MARK --set-xmark %s' % (
- floating_ip, internal_mark))
- mark_traffic_from_fixed_ip = (
- 'FORWARD', '-s %s -j $float-snat' % fixed_ip)
- return [mark_traffic_to_floating_ip, mark_traffic_from_fixed_ip]
-
- def get_address_scope_mark_mask(self, address_scope=None):
- if not address_scope:
- address_scope = DEFAULT_ADDRESS_SCOPE
-
- if address_scope not in self._address_scope_to_mark_id:
- self._address_scope_to_mark_id[address_scope] = (
- self.available_mark_ids.pop())
-
- mark_id = self._address_scope_to_mark_id[address_scope]
- # NOTE: Address scopes use only the upper 16 bits of the 32 fwmark
- return "%s/%s" % (hex(mark_id << 16), ADDRESS_SCOPE_MARK_MASK)
-
- def get_port_address_scope_mark(self, port):
- """Get the IP version 4 and 6 address scope mark for the port
-
- :param port: A port dict from the RPC call
- :returns: A dict mapping the address family to the address scope mark
- """
- port_scopes = port.get('address_scopes', {})
-
- address_scope_mark_masks = (
- (int(k), self.get_address_scope_mark_mask(v))
- for k, v in port_scopes.items())
- return collections.defaultdict(self.get_address_scope_mark_mask,
- address_scope_mark_masks)
-
- def process_floating_ip_nat_rules(self):
- """Configure NAT rules for the router's floating IPs.
-
- Configures iptables rules for the floating ips of the given router
- """
- # Clear out all iptables rules for floating ips
- self.iptables_manager.ipv4['nat'].clear_rules_by_tag('floating_ip')
-
- floating_ips = self.get_floating_ips()
- # Loop once to ensure that floating ips are configured.
- for fip in floating_ips:
- # Rebuild iptables rules for the floating ip.
- fixed = fip['fixed_ip_address']
- fip_ip = fip['floating_ip_address']
- for chain, rule in self.floating_forward_rules(fip_ip, fixed):
- self.iptables_manager.ipv4['nat'].add_rule(chain, rule,
- tag='floating_ip')
-
- self.iptables_manager.apply()
-
- def process_floating_ip_address_scope_rules(self):
- """Configure address scope related iptables rules for the router's
- floating IPs.
- """
-
- # Clear out all iptables rules for floating ips
- self.iptables_manager.ipv4['mangle'].clear_rules_by_tag('floating_ip')
- all_floating_ips = self.get_floating_ips()
- ext_scope = self._get_external_address_scope()
- # Filter out the floating ips that have fixed ip in the same address
- # scope. Because the packets for them will always be in one address
- # scope, no need to manipulate MARK/CONNMARK for them.
- floating_ips = [fip for fip in all_floating_ips
- if fip.get('fixed_ip_address_scope') != ext_scope]
- if floating_ips:
- ext_scope_mark = self.get_address_scope_mark_mask(ext_scope)
- ports_scopemark = self._get_address_scope_mark()
- devices_in_ext_scope = {
- device for device, mark
- in ports_scopemark[l3_constants.IP_VERSION_4].items()
- if mark == ext_scope_mark}
- # Add address scope for floatingip egress
- for device in devices_in_ext_scope:
- self.iptables_manager.ipv4['mangle'].add_rule(
- 'float-snat',
- '-o %s -j MARK --set-xmark %s'
- % (device, ext_scope_mark),
- tag='floating_ip')
-
- # Loop once to ensure that floating ips are configured.
- for fip in floating_ips:
- # Rebuild iptables rules for the floating ip.
- fip_ip = fip['floating_ip_address']
- # Send the floating ip traffic to the right address scope
- fixed_ip = fip['fixed_ip_address']
- fixed_scope = fip.get('fixed_ip_address_scope')
- internal_mark = self.get_address_scope_mark_mask(fixed_scope)
- mangle_rules = self.floating_mangle_rules(
- fip_ip, fixed_ip, internal_mark)
- for chain, rule in mangle_rules:
- self.iptables_manager.ipv4['mangle'].add_rule(
- chain, rule, tag='floating_ip')
-
- def process_snat_dnat_for_fip(self):
- try:
- self.process_floating_ip_nat_rules()
- except Exception:
- # TODO(salv-orlando): Less broad catching
- msg = _('L3 agent failure to setup NAT for floating IPs')
- LOG.exception(msg)
- raise n_exc.FloatingIpSetupException(msg)
-
- def _add_fip_addr_to_device(self, fip, device):
- """Configures the floating ip address on the device.
- """
- try:
- ip_cidr = common_utils.ip_to_cidr(fip['floating_ip_address'])
- device.addr.add(ip_cidr)
- return True
- except RuntimeError:
- # any exception occurred here should cause the floating IP
- # to be set in error state
- LOG.warning(_LW("Unable to configure IP address for "
- "floating IP: %s"), fip['id'])
-
- def add_floating_ip(self, fip, interface_name, device):
- raise NotImplementedError()
-
- def remove_floating_ip(self, device, ip_cidr):
- device.delete_addr_and_conntrack_state(ip_cidr)
-
- def move_floating_ip(self, fip):
- return l3_constants.FLOATINGIP_STATUS_ACTIVE
-
- def remove_external_gateway_ip(self, device, ip_cidr):
- device.delete_addr_and_conntrack_state(ip_cidr)
-
- def get_router_cidrs(self, device):
- return set([addr['cidr'] for addr in device.addr.list()])
-
- def process_floating_ip_addresses(self, interface_name):
- """Configure IP addresses on router's external gateway interface.
-
- Ensures addresses for existing floating IPs and cleans up
- those that should not longer be configured.
- """
-
- fip_statuses = {}
- if interface_name is None:
- LOG.debug('No Interface for floating IPs router: %s',
- self.router['id'])
- return fip_statuses
-
- device = ip_lib.IPDevice(interface_name, namespace=self.ns_name)
- existing_cidrs = self.get_router_cidrs(device)
- new_cidrs = set()
-
- floating_ips = self.get_floating_ips()
- # Loop once to ensure that floating ips are configured.
- for fip in floating_ips:
- fip_ip = fip['floating_ip_address']
- ip_cidr = common_utils.ip_to_cidr(fip_ip)
- new_cidrs.add(ip_cidr)
- fip_statuses[fip['id']] = l3_constants.FLOATINGIP_STATUS_ACTIVE
- if ip_cidr not in existing_cidrs:
- fip_statuses[fip['id']] = self.add_floating_ip(
- fip, interface_name, device)
- LOG.debug('Floating ip %(id)s added, status %(status)s',
- {'id': fip['id'],
- 'status': fip_statuses.get(fip['id'])})
- elif (fip_ip in self.fip_map and
- self.fip_map[fip_ip] != fip['fixed_ip_address']):
- LOG.debug("Floating IP was moved from fixed IP "
- "%(old)s to %(new)s",
- {'old': self.fip_map[fip_ip],
- 'new': fip['fixed_ip_address']})
- fip_statuses[fip['id']] = self.move_floating_ip(fip)
- elif fip_statuses[fip['id']] == fip['status']:
- # mark the status as not changed. we can't remove it because
- # that's how the caller determines that it was removed
- fip_statuses[fip['id']] = FLOATINGIP_STATUS_NOCHANGE
- fips_to_remove = (
- ip_cidr for ip_cidr in existing_cidrs - new_cidrs
- if common_utils.is_cidr_host(ip_cidr))
- for ip_cidr in fips_to_remove:
- LOG.debug("Removing floating ip %s from interface %s in "
- "namespace %s", ip_cidr, interface_name, self.ns_name)
- self.remove_floating_ip(device, ip_cidr)
-
- return fip_statuses
-
- def configure_fip_addresses(self, interface_name):
- try:
- return self.process_floating_ip_addresses(interface_name)
- except Exception:
- # TODO(salv-orlando): Less broad catching
- msg = _('L3 agent failure to setup floating IPs')
- LOG.exception(msg)
- raise n_exc.FloatingIpSetupException(msg)
-
- def put_fips_in_error_state(self):
- fip_statuses = {}
- for fip in self.router.get(l3_constants.FLOATINGIP_KEY, []):
- fip_statuses[fip['id']] = l3_constants.FLOATINGIP_STATUS_ERROR
- return fip_statuses
-
- def delete(self, agent):
- self.router['gw_port'] = None
- self.router[l3_constants.INTERFACE_KEY] = []
- self.router[l3_constants.FLOATINGIP_KEY] = []
- self.process_delete(agent)
- self.disable_radvd()
- self.router_namespace.delete()
-
- def _internal_network_updated(self, port, subnet_id, prefix, old_prefix,
- updated_cidrs):
- interface_name = self.get_internal_device_name(port['id'])
- if prefix != l3_constants.PROVISIONAL_IPV6_PD_PREFIX:
- fixed_ips = port['fixed_ips']
- for fixed_ip in fixed_ips:
- if fixed_ip['subnet_id'] == subnet_id:
- v6addr = common_utils.ip_to_cidr(fixed_ip['ip_address'],
- fixed_ip.get('prefixlen'))
- if v6addr not in updated_cidrs:
- self.driver.add_ipv6_addr(interface_name, v6addr,
- self.ns_name)
- else:
- self.driver.delete_ipv6_addr_with_prefix(interface_name,
- old_prefix,
- self.ns_name)
-
- def _internal_network_added(self, ns_name, network_id, port_id,
- fixed_ips, mac_address,
- interface_name, prefix, mtu=None):
- LOG.debug("adding internal network: prefix(%s), port(%s)",
- prefix, port_id)
- self.driver.plug(network_id, port_id, interface_name, mac_address,
- namespace=ns_name,
- prefix=prefix, mtu=mtu)
-
- ip_cidrs = common_utils.fixed_ip_cidrs(fixed_ips)
- self.driver.init_router_port(
- interface_name, ip_cidrs, namespace=ns_name)
- for fixed_ip in fixed_ips:
- ip_lib.send_ip_addr_adv_notif(ns_name,
- interface_name,
- fixed_ip['ip_address'],
- self.agent_conf)
-
- def internal_network_added(self, port):
- network_id = port['network_id']
- port_id = port['id']
- fixed_ips = port['fixed_ips']
- mac_address = port['mac_address']
-
- interface_name = self.get_internal_device_name(port_id)
-
- self._internal_network_added(self.ns_name,
- network_id,
- port_id,
- fixed_ips,
- mac_address,
- interface_name,
- INTERNAL_DEV_PREFIX,
- mtu=port.get('mtu'))
-
- def internal_network_removed(self, port):
- interface_name = self.get_internal_device_name(port['id'])
- LOG.debug("removing internal network: port(%s) interface(%s)",
- port['id'], interface_name)
- if ip_lib.device_exists(interface_name, namespace=self.ns_name):
- self.driver.unplug(interface_name, namespace=self.ns_name,
- prefix=INTERNAL_DEV_PREFIX)
-
- def _get_existing_devices(self):
- ip_wrapper = ip_lib.IPWrapper(namespace=self.ns_name)
- ip_devs = ip_wrapper.get_devices(exclude_loopback=True)
- return [ip_dev.name for ip_dev in ip_devs]
-
- @staticmethod
- def _get_updated_ports(existing_ports, current_ports):
- updated_ports = dict()
- current_ports_dict = {p['id']: p for p in current_ports}
- for existing_port in existing_ports:
- current_port = current_ports_dict.get(existing_port['id'])
- if current_port:
- if (sorted(existing_port['fixed_ips'],
- key=common_utils.safe_sort_key) !=
- sorted(current_port['fixed_ips'],
- key=common_utils.safe_sort_key)):
- updated_ports[current_port['id']] = current_port
- return updated_ports
-
- @staticmethod
- def _port_has_ipv6_subnet(port):
- if 'subnets' in port:
- for subnet in port['subnets']:
- if (netaddr.IPNetwork(subnet['cidr']).version == 6 and
- subnet['cidr'] != l3_constants.PROVISIONAL_IPV6_PD_PREFIX):
- return True
-
- def enable_radvd(self, internal_ports=None):
- LOG.debug('Spawning radvd daemon in router device: %s', self.router_id)
- if not internal_ports:
- internal_ports = self.internal_ports
- self.radvd.enable(internal_ports)
-
- def disable_radvd(self):
- LOG.debug('Terminating radvd daemon in router device: %s',
- self.router_id)
- self.radvd.disable()
-
- def internal_network_updated(self, interface_name, ip_cidrs):
- self.driver.init_router_port(
- interface_name,
- ip_cidrs=ip_cidrs,
- namespace=self.ns_name)
-
- def address_scope_mangle_rule(self, device_name, mark_mask):
- return '-i %s -j MARK --set-xmark %s' % (device_name, mark_mask)
-
- def address_scope_filter_rule(self, device_name, mark_mask):
- return '-o %s -m mark ! --mark %s -j DROP' % (
- device_name, mark_mask)
-
- def _process_internal_ports(self, pd):
- existing_port_ids = set(p['id'] for p in self.internal_ports)
-
- internal_ports = self.router.get(l3_constants.INTERFACE_KEY, [])
- current_port_ids = set(p['id'] for p in internal_ports
- if p['admin_state_up'])
-
- new_port_ids = current_port_ids - existing_port_ids
- new_ports = [p for p in internal_ports if p['id'] in new_port_ids]
- old_ports = [p for p in self.internal_ports
- if p['id'] not in current_port_ids]
- updated_ports = self._get_updated_ports(self.internal_ports,
- internal_ports)
-
- enable_ra = False
- for p in new_ports:
- self.internal_network_added(p)
- LOG.debug("appending port %s to internal_ports cache", p)
- self.internal_ports.append(p)
- enable_ra = enable_ra or self._port_has_ipv6_subnet(p)
- for subnet in p['subnets']:
- if ipv6_utils.is_ipv6_pd_enabled(subnet):
- interface_name = self.get_internal_device_name(p['id'])
- pd.enable_subnet(self.router_id, subnet['id'],
- subnet['cidr'],
- interface_name, p['mac_address'])
-
- for p in old_ports:
- self.internal_network_removed(p)
- LOG.debug("removing port %s from internal_ports cache", p)
- self.internal_ports.remove(p)
- enable_ra = enable_ra or self._port_has_ipv6_subnet(p)
- for subnet in p['subnets']:
- if ipv6_utils.is_ipv6_pd_enabled(subnet):
- pd.disable_subnet(self.router_id, subnet['id'])
-
- updated_cidrs = []
- if updated_ports:
- for index, p in enumerate(internal_ports):
- if not updated_ports.get(p['id']):
- continue
- self.internal_ports[index] = updated_ports[p['id']]
- interface_name = self.get_internal_device_name(p['id'])
- ip_cidrs = common_utils.fixed_ip_cidrs(p['fixed_ips'])
- LOG.debug("updating internal network for port %s", p)
- updated_cidrs += ip_cidrs
- self.internal_network_updated(interface_name, ip_cidrs)
- enable_ra = enable_ra or self._port_has_ipv6_subnet(p)
-
- # Check if there is any pd prefix update
- for p in internal_ports:
- if p['id'] in (set(current_port_ids) & set(existing_port_ids)):
- for subnet in p.get('subnets', []):
- if ipv6_utils.is_ipv6_pd_enabled(subnet):
- old_prefix = pd.update_subnet(self.router_id,
- subnet['id'],
- subnet['cidr'])
- if old_prefix:
- self._internal_network_updated(p, subnet['id'],
- subnet['cidr'],
- old_prefix,
- updated_cidrs)
- enable_ra = True
-
- # Enable RA
- if enable_ra:
- self.enable_radvd(internal_ports)
-
- existing_devices = self._get_existing_devices()
- current_internal_devs = set(n for n in existing_devices
- if n.startswith(INTERNAL_DEV_PREFIX))
- current_port_devs = set(self.get_internal_device_name(port_id)
- for port_id in current_port_ids)
- stale_devs = current_internal_devs - current_port_devs
- for stale_dev in stale_devs:
- LOG.debug('Deleting stale internal router device: %s',
- stale_dev)
- pd.remove_stale_ri_ifname(self.router_id, stale_dev)
- self.driver.unplug(stale_dev,
- namespace=self.ns_name,
- prefix=INTERNAL_DEV_PREFIX)
-
- def _list_floating_ip_cidrs(self):
- # Compute a list of addresses this router is supposed to have.
- # This avoids unnecessarily removing those addresses and
- # causing a momentarily network outage.
- floating_ips = self.get_floating_ips()
- return [common_utils.ip_to_cidr(ip['floating_ip_address'])
- for ip in floating_ips]
-
- def _plug_external_gateway(self, ex_gw_port, interface_name, ns_name):
- self.ovs_driver.plug(ex_gw_port['network_id'],
- ex_gw_port['id'],
- interface_name,
- ex_gw_port['mac_address'],
- bridge=self.agent_conf.external_network_bridge,
- namespace=ns_name,
- prefix=EXTERNAL_DEV_PREFIX,
- mtu=ex_gw_port.get('mtu'))
-
- def _get_external_gw_ips(self, ex_gw_port):
- gateway_ips = []
- if 'subnets' in ex_gw_port:
- gateway_ips = [subnet['gateway_ip']
- for subnet in ex_gw_port['subnets']
- if subnet['gateway_ip']]
- if self.use_ipv6 and not self.is_v6_gateway_set(gateway_ips):
- # No IPv6 gateway is available, but IPv6 is enabled.
- if self.agent_conf.ipv6_gateway:
- # ipv6_gateway configured, use address for default route.
- gateway_ips.append(self.agent_conf.ipv6_gateway)
- return gateway_ips
-
- def _add_route_to_gw(self, ex_gw_port, device_name,
- namespace, preserve_ips):
- # Note: ipv6_gateway is an ipv6 LLA
- # and so doesn't need a special route
- for subnet in ex_gw_port.get('subnets', []):
- is_gateway_not_in_subnet = (subnet['gateway_ip'] and
- not ipam_utils.check_subnet_ip(
- subnet['cidr'],
- subnet['gateway_ip']))
- if is_gateway_not_in_subnet:
- preserve_ips.append(subnet['gateway_ip'])
- device = ip_lib.IPDevice(device_name, namespace=namespace)
- device.route.add_route(subnet['gateway_ip'], scope='link')
-
- def _external_gateway_added(self, ex_gw_port, interface_name,
- ns_name, preserve_ips):
- LOG.debug("External gateway added: port(%s), interface(%s), ns(%s)",
- ex_gw_port, interface_name, ns_name)
- self._plug_external_gateway(ex_gw_port, interface_name, ns_name)
-
- # Build up the interface and gateway IP addresses that
- # will be added to the interface.
- ip_cidrs = common_utils.fixed_ip_cidrs(ex_gw_port['fixed_ips'])
-
- gateway_ips = self._get_external_gw_ips(ex_gw_port)
- enable_ra_on_gw = False
- if self.use_ipv6 and not self.is_v6_gateway_set(gateway_ips):
- # There is no IPv6 gw_ip, use RouterAdvt for default route.
- enable_ra_on_gw = True
-
- self._add_route_to_gw(ex_gw_port, device_name=interface_name,
- namespace=ns_name, preserve_ips=preserve_ips)
- self.ovs_driver.init_router_port(
- interface_name,
- ip_cidrs,
- namespace=ns_name,
- extra_subnets=ex_gw_port.get('extra_subnets', []),
- preserve_ips=preserve_ips,
- clean_connections=True)
-
- device = ip_lib.IPDevice(interface_name, namespace=ns_name)
- for ip in gateway_ips or []:
- device.route.add_gateway(ip)
-
- if enable_ra_on_gw:
- self.driver.configure_ipv6_ra(ns_name, interface_name)
-
- for fixed_ip in ex_gw_port['fixed_ips']:
- ip_lib.send_ip_addr_adv_notif(ns_name,
- interface_name,
- fixed_ip['ip_address'],
- self.agent_conf)
-
- def is_v6_gateway_set(self, gateway_ips):
- """Check to see if list of gateway_ips has an IPv6 gateway.
- """
- # Note - don't require a try-except here as all
- # gateway_ips elements are valid addresses, if they exist.
- return any(netaddr.IPAddress(gw_ip).version == 6
- for gw_ip in gateway_ips)
-
- def external_gateway_added(self, ex_gw_port, interface_name):
- preserve_ips = self._list_floating_ip_cidrs()
- self._external_gateway_added(
- ex_gw_port, interface_name, self.ns_name, preserve_ips)
-
- def external_gateway_updated(self, ex_gw_port, interface_name):
- preserve_ips = self._list_floating_ip_cidrs()
- self._external_gateway_added(
- ex_gw_port, interface_name, self.ns_name, preserve_ips)
-
- def external_gateway_removed(self, ex_gw_port, interface_name):
- LOG.debug("External gateway removed: port(%s), interface(%s)",
- ex_gw_port, interface_name)
- device = ip_lib.IPDevice(interface_name, namespace=self.ns_name)
- for ip_addr in ex_gw_port['fixed_ips']:
- self.remove_external_gateway_ip(device,
- common_utils.ip_to_cidr(
- ip_addr['ip_address'],
- ip_addr['prefixlen']))
- self.ovs_driver.unplug(interface_name,
- bridge=self.agent_conf.external_network_bridge,
- namespace=self.ns_name,
- prefix=EXTERNAL_DEV_PREFIX)
-
- @staticmethod
- def _gateway_ports_equal(port1, port2):
- return port1 == port2
-
- def _process_external_gateway(self, ex_gw_port, pd):
- # TODO(Carl) Refactor to clarify roles of ex_gw_port vs self.ex_gw_port
- ex_gw_port_id = (ex_gw_port and ex_gw_port['id'] or
- self.ex_gw_port and self.ex_gw_port['id'])
-
- interface_name = None
- if ex_gw_port_id:
- interface_name = self.get_external_device_name(ex_gw_port_id)
- if ex_gw_port:
- if not self.ex_gw_port:
- self.external_gateway_added(ex_gw_port, interface_name)
- pd.add_gw_interface(self.router['id'], interface_name)
- elif not self._gateway_ports_equal(ex_gw_port, self.ex_gw_port):
- self.external_gateway_updated(ex_gw_port, interface_name)
- elif not ex_gw_port and self.ex_gw_port:
- self.external_gateway_removed(self.ex_gw_port, interface_name)
- pd.remove_gw_interface(self.router['id'])
-
- existing_devices = self._get_existing_devices()
- stale_devs = [dev for dev in existing_devices
- if dev.startswith(EXTERNAL_DEV_PREFIX)
- and dev != interface_name]
- for stale_dev in stale_devs:
- LOG.debug('Deleting stale external router device: %s', stale_dev)
- pd.remove_gw_interface(self.router['id'])
- self.ovs_driver.unplug(stale_dev,
- bridge=self.agent_conf.external_network_bridge,
- namespace=self.ns_name,
- prefix=EXTERNAL_DEV_PREFIX)
-
- # Process SNAT rules for external gateway
- gw_port = self._router.get('gw_port')
- self._handle_router_snat_rules(gw_port, interface_name)
-
- def _prevent_snat_for_internal_traffic_rule(self, interface_name):
- return (
- 'POSTROUTING', '! -i %(interface_name)s '
- '! -o %(interface_name)s -m conntrack ! '
- '--ctstate DNAT -j ACCEPT' %
- {'interface_name': interface_name})
-
- def external_gateway_nat_fip_rules(self, ex_gw_ip, interface_name):
- dont_snat_traffic_to_internal_ports_if_not_to_floating_ip = (
- self._prevent_snat_for_internal_traffic_rule(interface_name))
- # Makes replies come back through the router to reverse DNAT
- ext_in_mark = self.agent_conf.external_ingress_mark
- snat_internal_traffic_to_floating_ip = (
- 'snat', '-m mark ! --mark %s/%s '
- '-m conntrack --ctstate DNAT '
- '-j SNAT --to-source %s'
- % (ext_in_mark, l3_constants.ROUTER_MARK_MASK, ex_gw_ip))
- return [dont_snat_traffic_to_internal_ports_if_not_to_floating_ip,
- snat_internal_traffic_to_floating_ip]
-
- def external_gateway_nat_snat_rules(self, ex_gw_ip, interface_name):
- snat_normal_external_traffic = (
- 'snat', '-o %s -j SNAT --to-source %s' %
- (interface_name, ex_gw_ip))
- return [snat_normal_external_traffic]
-
- def external_gateway_mangle_rules(self, interface_name):
- mark = self.agent_conf.external_ingress_mark
- mark_packets_entering_external_gateway_port = (
- 'mark', '-i %s -j MARK --set-xmark %s/%s' %
- (interface_name, mark, l3_constants.ROUTER_MARK_MASK))
- return [mark_packets_entering_external_gateway_port]
-
- def _empty_snat_chains(self, iptables_manager):
- iptables_manager.ipv4['nat'].empty_chain('POSTROUTING')
- iptables_manager.ipv4['nat'].empty_chain('snat')
- iptables_manager.ipv4['mangle'].empty_chain('mark')
- iptables_manager.ipv4['mangle'].empty_chain('POSTROUTING')
-
- def _add_snat_rules(self, ex_gw_port, iptables_manager,
- interface_name):
- self.process_external_port_address_scope_routing(iptables_manager)
-
- if ex_gw_port:
- # ex_gw_port should not be None in this case
- # NAT rules are added only if ex_gw_port has an IPv4 address
- for ip_addr in ex_gw_port['fixed_ips']:
- ex_gw_ip = ip_addr['ip_address']
- if netaddr.IPAddress(ex_gw_ip).version == 4:
- if self._snat_enabled:
- rules = self.external_gateway_nat_snat_rules(
- ex_gw_ip, interface_name)
- for rule in rules:
- iptables_manager.ipv4['nat'].add_rule(*rule)
-
- rules = self.external_gateway_nat_fip_rules(
- ex_gw_ip, interface_name)
- for rule in rules:
- iptables_manager.ipv4['nat'].add_rule(*rule)
- rules = self.external_gateway_mangle_rules(interface_name)
- for rule in rules:
- iptables_manager.ipv4['mangle'].add_rule(*rule)
-
- break
-
- def _handle_router_snat_rules(self, ex_gw_port, interface_name):
- self._empty_snat_chains(self.iptables_manager)
-
- self.iptables_manager.ipv4['nat'].add_rule('snat', '-j $float-snat')
-
- self._add_snat_rules(ex_gw_port,
- self.iptables_manager,
- interface_name)
-
- def _process_external_on_delete(self, agent):
- fip_statuses = {}
- try:
- ex_gw_port = self.get_ex_gw_port()
- self._process_external_gateway(ex_gw_port, agent.pd)
- if not ex_gw_port:
- return
-
- interface_name = self.get_external_device_interface_name(
- ex_gw_port)
- fip_statuses = self.configure_fip_addresses(interface_name)
-
- except (n_exc.FloatingIpSetupException):
- # All floating IPs must be put in error state
- LOG.exception(_LE("Failed to process floating IPs."))
- fip_statuses = self.put_fips_in_error_state()
- finally:
- self.update_fip_statuses(agent, fip_statuses)
-
- def process_external(self, agent):
- fip_statuses = {}
- try:
- with self.iptables_manager.defer_apply():
- ex_gw_port = self.get_ex_gw_port()
- self._process_external_gateway(ex_gw_port, agent.pd)
- if not ex_gw_port:
- return
-
- # Process SNAT/DNAT rules and addresses for floating IPs
- self.process_snat_dnat_for_fip()
-
- # Once NAT rules for floating IPs are safely in place
- # configure their addresses on the external gateway port
- interface_name = self.get_external_device_interface_name(
- ex_gw_port)
- fip_statuses = self.configure_fip_addresses(interface_name)
-
- except (n_exc.FloatingIpSetupException,
- n_exc.IpTablesApplyException):
- # All floating IPs must be put in error state
- LOG.exception(_LE("Failed to process floating IPs."))
- fip_statuses = self.put_fips_in_error_state()
- finally:
- self.update_fip_statuses(agent, fip_statuses)
-
- def update_fip_statuses(self, agent, fip_statuses):
- # Identify floating IPs which were disabled
- existing_floating_ips = self.floating_ips
- self.floating_ips = set(fip_statuses.keys())
- for fip_id in existing_floating_ips - self.floating_ips:
- fip_statuses[fip_id] = l3_constants.FLOATINGIP_STATUS_DOWN
- # filter out statuses that didn't change
- fip_statuses = {f: stat for f, stat in fip_statuses.items()
- if stat != FLOATINGIP_STATUS_NOCHANGE}
- if not fip_statuses:
- return
- LOG.debug('Sending floating ip statuses: %s', fip_statuses)
- # Update floating IP status on the neutron server
- agent.plugin_rpc.update_floatingip_statuses(
- agent.context, self.router_id, fip_statuses)
-
- def _get_port_devicename_scopemark(self, ports, name_generator):
- devicename_scopemark = {l3_constants.IP_VERSION_4: dict(),
- l3_constants.IP_VERSION_6: dict()}
- for p in ports:
- device_name = name_generator(p['id'])
- ip_cidrs = common_utils.fixed_ip_cidrs(p['fixed_ips'])
- port_as_marks = self.get_port_address_scope_mark(p)
- for ip_version in {ip_lib.get_ip_version(cidr)
- for cidr in ip_cidrs}:
- devicename_scopemark[ip_version][device_name] = (
- port_as_marks[ip_version])
-
- return devicename_scopemark
-
- def _get_address_scope_mark(self):
- # Prepare address scope iptables rule for internal ports
- internal_ports = self.router.get(l3_constants.INTERFACE_KEY, [])
- ports_scopemark = self._get_port_devicename_scopemark(
- internal_ports, self.get_internal_device_name)
-
- # Prepare address scope iptables rule for external port
- external_port = self.get_ex_gw_port()
- if external_port:
- external_port_scopemark = self._get_port_devicename_scopemark(
- [external_port], self.get_external_device_name)
- for ip_version in (l3_constants.IP_VERSION_4,
- l3_constants.IP_VERSION_6):
- ports_scopemark[ip_version].update(
- external_port_scopemark[ip_version])
- return ports_scopemark
-
- def _add_address_scope_mark(self, iptables_manager, ports_scopemark):
- external_device_name = None
- external_port = self.get_ex_gw_port()
- if external_port:
- external_device_name = self.get_external_device_name(
- external_port['id'])
-
- # Process address scope iptables rules
- for ip_version in (l3_constants.IP_VERSION_4,
- l3_constants.IP_VERSION_6):
- scopemarks = ports_scopemark[ip_version]
- iptables = iptables_manager.get_tables(ip_version)
- iptables['mangle'].empty_chain('scope')
- iptables['filter'].empty_chain('scope')
- dont_block_external = (ip_version == l3_constants.IP_VERSION_4
- and self._snat_enabled and external_port)
- for device_name, mark in scopemarks.items():
- # Add address scope iptables rule
- iptables['mangle'].add_rule(
- 'scope',
- self.address_scope_mangle_rule(device_name, mark))
- if dont_block_external and device_name == external_device_name:
- continue
- iptables['filter'].add_rule(
- 'scope',
- self.address_scope_filter_rule(device_name, mark))
-
- def process_ports_address_scope_iptables(self):
- ports_scopemark = self._get_address_scope_mark()
- self._add_address_scope_mark(self.iptables_manager, ports_scopemark)
-
- def _get_external_address_scope(self):
- external_port = self.get_ex_gw_port()
- if not external_port:
- return
-
- scopes = external_port.get('address_scopes', {})
- return scopes.get(str(l3_constants.IP_VERSION_4))
-
- def process_external_port_address_scope_routing(self, iptables_manager):
- if not self._snat_enabled:
- return
-
- external_port = self.get_ex_gw_port()
- if not external_port:
- return
-
- external_devicename = self.get_external_device_name(
- external_port['id'])
-
- # Saves the originating address scope by saving the packet MARK to
- # the CONNMARK for new connections so that returning traffic can be
- # match to it.
- rule = ('-o %s -m connmark --mark 0x0/0xffff0000 '
- '-j CONNMARK --save-mark '
- '--nfmask 0xffff0000 --ctmask 0xffff0000' %
- external_devicename)
-
- iptables_manager.ipv4['mangle'].add_rule('POSTROUTING', rule)
-
- address_scope = self._get_external_address_scope()
- if not address_scope:
- return
-
- # Prevents snat within the same address scope
- rule = '-o %s -m connmark --mark %s -j ACCEPT' % (
- external_devicename,
- self.get_address_scope_mark_mask(address_scope))
- iptables_manager.ipv4['nat'].add_rule('snat', rule)
-
- def process_address_scope(self):
- with self.iptables_manager.defer_apply():
- self.process_ports_address_scope_iptables()
- self.process_floating_ip_address_scope_rules()
-
- @common_utils.exception_logger()
- def process_delete(self, agent):
- """Process the delete of this router
-
- This method is the point where the agent requests that this router
- be deleted. This is a separate code path from process in that it
- avoids any changes to the qrouter namespace that will be removed
- at the end of the operation.
-
- :param agent: Passes the agent in order to send RPC messages.
- """
- LOG.debug("process router delete")
- if self.router_namespace.exists():
- self._process_internal_ports(agent.pd)
- agent.pd.sync_router(self.router['id'])
- self._process_external_on_delete(agent)
- else:
- LOG.warning(_LW("Can't gracefully delete the router %s: "
- "no router namespace found."), self.router['id'])
-
- @common_utils.exception_logger()
- def process(self, agent):
- """Process updates to this router
-
- This method is the point where the agent requests that updates be
- applied to this router.
-
- :param agent: Passes the agent in order to send RPC messages.
- """
- LOG.debug("process router updates")
- self._process_internal_ports(agent.pd)
- agent.pd.sync_router(self.router['id'])
- self.process_external(agent)
- self.process_address_scope()
- # Process static routes for router
- self.routes_updated(self.routes, self.router['routes'])
- self.routes = self.router['routes']
-
- # Update ex_gw_port and enable_snat on the router info cache
- self.ex_gw_port = self.get_ex_gw_port()
- self.fip_map = dict([(fip['floating_ip_address'],
- fip['fixed_ip_address'])
- for fip in self.get_floating_ips()])
- # TODO(Carl) FWaaS uses this. Why is it set after processing is done?
- self.enable_snat = self.router.get('enable_snat')