aboutsummaryrefslogtreecommitdiffstats
path: root/os_net_config/impl_eni.py
blob: 7eb69f36341b308567450b05867709088e3c369f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
# -*- 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):

        ovs_extra = []
        data = ""
        address_data = ""
        if static_addr:
            address_data += "    address %s\n" % static_addr.ip
            address_data += "    netmask %s\n" % static_addr.netmask
        else:
            v4_addresses = interface.v4_addresses()
            if v4_addresses:
                data += self._add_common(interface, v4_addresses[0])

            v6_addresses = interface.v6_addresses()
            if v6_addresses:
                data += self._add_common(interface, v6_addresses[0])

            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}