# -*- Coding: utf-8 -*- # Copyright 2014-2015 Red Hat, Inc. # # 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 logging import netaddr import os_net_config from os_net_config import objects from os_net_config import utils logger = logging.getLogger(__name__) # TODO(?): should move to interfaces.d def _network_config_path(prefix=''): return prefix + "/etc/network/interfaces" class ENINetConfig(os_net_config.NetConfig): """Debian/Ubuntu implementation for network config Configure iface/bridge/routes using debian/ubuntu /etc/network/interfaces format. """ def __init__(self, noop=False, root_dir=''): super(ENINetConfig, self).__init__(noop, root_dir) self.interfaces = {} self.routes = {} self.bridges = {} logger.info('ENI net config provider created.') def _add_common(self, interface, static_addr=None, ip_version=4): ovs_extra = [] data = "" address_data = "" if static_addr: address_data += " address %s\n" % static_addr.ip if ip_version == 6: address_data += " netmask %s\n" % static_addr.prefixlen else: address_data += " netmask %s\n" % static_addr.netmask else: v4_addresses = interface.v4_addresses() if v4_addresses: for v4_address in v4_addresses: data += self._add_common(interface, v4_address) v6_addresses = interface.v6_addresses() if v6_addresses: for v6_address in v6_addresses: data += self._add_common(interface, v6_address, 6) if data: return data if isinstance(interface, objects.Vlan): _iface = "iface vlan%i " % interface.vlan_id else: _iface = "iface %s " % interface.name if static_addr and static_addr.version == 6: _iface += "inet6 " else: _iface += "inet " if interface.use_dhcp: _iface += "dhcp\n" elif interface.addresses: _iface += "static\n" else: _iface += "manual\n" if isinstance(interface, objects.OvsBridge): data += "auto %s\n" % interface.name data += "allow-ovs %s\n" % interface.name data += _iface data += address_data data += " ovs_type OVSBridge\n" if interface.members: data += " ovs_ports" for i in interface.members: data += " %s" % i.name data += "\n" for mem in interface.members: if isinstance(mem, objects.Interface): data += " pre-up ip addr flush dev %s\n" % mem.name if interface.primary_interface_name: mac = utils.interface_mac(interface.primary_interface_name) ovs_extra.append("set bridge %s other-config:hwaddr=%s" % (interface.name, mac)) ovs_extra.extend(interface.ovs_extra) elif interface.ovs_port: if isinstance(interface, objects.Vlan): data += "auto vlan%i\n" % interface.vlan_id data += "allow-%s vlan%i\n" % (interface.bridge_name, interface.vlan_id) data += _iface data += address_data data += " ovs_bridge %s\n" % interface.bridge_name data += " ovs_type OVSIntPort\n" data += " ovs_options tag=%s\n" % interface.vlan_id else: data += "auto %s\n" % interface.name data += "allow-%s %s\n" % (interface.bridge_name, interface.name) data += _iface data += address_data data += " ovs_bridge %s\n" % interface.bridge_name data += " ovs_type OVSPort\n" elif isinstance(interface, objects.Vlan): data += "auto vlan%i\n" % interface.vlan_id data += _iface data += address_data data += " vlan-raw-device %s\n" % interface.device else: data += "auto %s\n" % interface.name data += _iface data += address_data if interface.mtu != 1500: data += " mtu %i\n" % interface.mtu if interface.hwaddr: raise NotImplemented("hwaddr is not implemented.") if ovs_extra: data += " ovs_extra %s\n" % " -- ".join(ovs_extra) return data def add_interface(self, interface): """Add an Interface object to the net config object. :param interface: The Interface object to add. """ logger.info('adding interface: %s' % interface.name) data = self._add_common(interface) logger.debug('interface data: %s' % data) self.interfaces[interface.name] = data if interface.routes: self._add_routes(interface.name, interface.routes) def add_bridge(self, bridge): """Add an OvsBridge object to the net config object. :param bridge: The OvsBridge object to add. """ logger.info('adding bridge: %s' % bridge.name) data = self._add_common(bridge) logger.debug('bridge data: %s' % data) self.bridges[bridge.name] = data if bridge.routes: self._add_routes(bridge.name, bridge.routes) def add_vlan(self, vlan): """Add a Vlan object to the net config object. :param vlan: The vlan object to add. """ logger.info('adding vlan: %s' % vlan.name) data = self._add_common(vlan) logger.debug('vlan data: %s' % data) self.interfaces[vlan.name] = data if vlan.routes: self._add_routes(vlan.name, vlan.routes) def _add_routes(self, interface_name, routes=[]): logger.info('adding custom route for interface: %s' % interface_name) data = "" for route in routes: if route.default and not route.ip_netmask: rt = netaddr.IPNetwork("0.0.0.0/0") else: rt = netaddr.IPNetwork(route.ip_netmask) data += "up route add -net %s netmask %s gw %s\n" % ( str(rt.ip), str(rt.netmask), route.next_hop) data += "down route del -net %s netmask %s gw %s\n" % ( str(rt.ip), str(rt.netmask), route.next_hop) self.routes[interface_name] = data logger.debug('route data: %s' % self.routes[interface_name]) def apply(self, cleanup=False, activate=True): """Apply the network configuration. :param cleanup: A boolean which indicates whether any undefined (existing but not present in the object model) interface should be disabled and deleted. :param activate: A boolean which indicates if the config should be activated by stopping/starting interfaces :returns: a dict of the format: filename/data which contains info for each file that was changed (or would be changed if in --noop mode). Note the noop mode is set via the constructor noop boolean """ new_config = "" # write out bridges first. This ensures that an ifup -a # on reboot brings them up first for bridge_name, bridge_data in self.bridges.iteritems(): route_data = self.routes.get(bridge_name) bridge_data += (route_data or '') new_config += bridge_data for interface_name, iface_data in self.interfaces.iteritems(): route_data = self.routes.get(interface_name) iface_data += (route_data or '') new_config += iface_data if utils.diff(_network_config_path(self.root_dir), new_config): if activate: for interface in self.interfaces.keys(): self.ifdown(interface) for bridge in self.bridges.keys(): self.ifdown(bridge, iftype='bridge') self.write_config(_network_config_path(self.root_dir), new_config) if activate: for bridge in self.bridges.keys(): self.ifup(bridge, iftype='bridge') for interface in self.interfaces.keys(): self.ifup(interface) else: logger.info('No interface changes are required.') return {_network_config_path(self.root_dir): new_config}