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
|
# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright (c) 2011 Citrix Systems, Inc.
# Copyright 2011 OpenStack LLC.
# Copyright (C) 2011 Nicira, Inc
# 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.
"""VIF drivers for XenAPI."""
from nova import flags
from nova import log as logging
from nova.openstack.common import cfg
from nova.virt import vif
from nova.virt.xenapi import network_utils
from nova.virt.xenapi import vm_utils
xenapi_ovs_integration_bridge_opt = cfg.StrOpt('xenapi_ovs_integration_bridge',
default='xapi1',
help='Name of Integration Bridge used by Open vSwitch')
FLAGS = flags.FLAGS
FLAGS.register_opt(xenapi_ovs_integration_bridge_opt)
LOG = logging.getLogger(__name__)
class XenVIFDriver(vif.VIFDriver):
def __init__(self, xenapi_session):
self._session = xenapi_session
class XenAPIBridgeDriver(XenVIFDriver):
"""VIF Driver for XenAPI that uses XenAPI to create Networks."""
def plug(self, instance, vif, vm_ref=None, device=None):
if not vm_ref:
vm_ref = vm_utils.VMHelper.lookup(self._session, instance.name)
if not device:
device = 0
if vif['network'].get_meta('should_create_vlan'):
network_ref = self._ensure_vlan_bridge(vif['network'])
else:
network_ref = network_utils.NetworkHelper.find_network_with_bridge(
self._session, vif['network']['bridge'])
vif_rec = {}
vif_rec['device'] = str(device)
vif_rec['network'] = network_ref
vif_rec['VM'] = vm_ref
vif_rec['MAC'] = vif['address']
vif_rec['MTU'] = '1500'
vif_rec['other_config'] = {}
if vif.get_meta('rxtx_cap'):
vif_rec['qos_algorithm_type'] = 'ratelimit'
vif_rec['qos_algorithm_params'] = {'kbps':
str(int(vif.get_meta('rxtx_cap')) * 1024)}
else:
vif_rec['qos_algorithm_type'] = ''
vif_rec['qos_algorithm_params'] = {}
return vif_rec
def _ensure_vlan_bridge(self, network):
"""Ensure that a VLAN bridge exists"""
vlan_num = network.get_meta('vlan')
bridge = network['bridge']
bridge_interface = FLAGS.vlan_interface or \
network.get_meta('bridge_interface')
# Check whether bridge already exists
# Retrieve network whose name_label is "bridge"
network_ref = network_utils.NetworkHelper.find_network_with_name_label(
self._session, bridge)
if network_ref is None:
# If bridge does not exists
# 1 - create network
description = 'network for nova bridge %s' % bridge
network_rec = {'name_label': bridge,
'name_description': description,
'other_config': {}}
network_ref = self._session.call_xenapi('network.create',
network_rec)
# 2 - find PIF for VLAN NOTE(salvatore-orlando): using double
# quotes inside single quotes as xapi filter only support
# tokens in double quotes
expr = ('field "device" = "%s" and field "VLAN" = "-1"' %
bridge_interface)
pifs = self._session.call_xenapi('PIF.get_all_records_where',
expr)
pif_ref = None
# Multiple PIF are ok: we are dealing with a pool
if len(pifs) == 0:
raise Exception(_('Found no PIF for device %s') %
bridge_interface)
for pif_ref in pifs.keys():
self._session.call_xenapi('VLAN.create',
pif_ref,
str(vlan_num),
network_ref)
else:
# Check VLAN tag is appropriate
network_rec = self._session.call_xenapi('network.get_record',
network_ref)
# Retrieve PIFs from network
for pif_ref in network_rec['PIFs']:
# Retrieve VLAN from PIF
pif_rec = self._session.call_xenapi('PIF.get_record',
pif_ref)
pif_vlan = int(pif_rec['VLAN'])
# Raise an exception if VLAN != vlan_num
if pif_vlan != vlan_num:
raise Exception(_(
"PIF %(pif_rec['uuid'])s for network "
"%(bridge)s has VLAN id %(pif_vlan)d. "
"Expected %(vlan_num)d") % locals())
return network_ref
def unplug(self, instance, vif):
pass
class XenAPIOpenVswitchDriver(XenVIFDriver):
"""VIF driver for Open vSwitch with XenAPI."""
def plug(self, instance, vif, vm_ref=None, device=None):
if not vm_ref:
vm_ref = vm_utils.VMHelper.lookup(self._session, instance.name)
if not device:
device = 0
# with OVS model, always plug into an OVS integration bridge
# that is already created
network_ref = network_utils.NetworkHelper.find_network_with_bridge(
self._session, FLAGS.xenapi_ovs_integration_bridge)
vif_rec = {}
vif_rec['device'] = str(device)
vif_rec['network'] = network_ref
vif_rec['VM'] = vm_ref
vif_rec['MAC'] = vif['address']
vif_rec['MTU'] = '1500'
vif_rec['qos_algorithm_type'] = ''
vif_rec['qos_algorithm_params'] = {}
# OVS on the hypervisor monitors this key and uses it to
# set the iface-id attribute
vif_rec['other_config'] = {'nicira-iface-id': vif['id']}
return vif_rec
def unplug(self, instance, vif):
pass
|
