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
|
#!/usr/bin/env python
# Copyright 2012 NEC Corporation.
# Based on ryu/openvswitch agents.
#
# Copyright 2012 Isaku Yamahata <yamahata at private email ne jp>
# Copyright 2011 VMware, 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.
import socket
import sys
import time
import eventlet
eventlet.monkey_patch()
from oslo import messaging
from neutron.agent.linux import ovs_lib
from neutron.agent import rpc as agent_rpc
from neutron.agent import securitygroups_rpc as sg_rpc
from neutron.common import config as common_config
from neutron.common import constants as q_const
from neutron.common import topics
from neutron import context as q_context
from neutron.extensions import securitygroup as ext_sg
from neutron.i18n import _LE, _LI
from neutron.openstack.common import log as logging
from neutron.openstack.common import loopingcall
from neutron.plugins.nec.common import config
LOG = logging.getLogger(__name__)
class NECPluginApi(agent_rpc.PluginApi):
def update_ports(self, context, agent_id, datapath_id,
port_added, port_removed):
"""RPC to update information of ports on Neutron Server."""
LOG.info(_LI("Update ports: added=%(added)s, "
"removed=%(removed)s"),
{'added': port_added, 'removed': port_removed})
cctxt = self.client.prepare()
return cctxt.call(context, 'update_ports',
agent_id=agent_id,
datapath_id=datapath_id,
port_added=port_added,
port_removed=port_removed)
class NECAgentRpcCallback(object):
target = messaging.Target(version='1.0')
def __init__(self, context, agent, sg_agent):
super(NECAgentRpcCallback, self).__init__()
self.context = context
self.agent = agent
self.sg_agent = sg_agent
def port_update(self, context, **kwargs):
LOG.debug("port_update received: %s", kwargs)
port = kwargs.get('port')
# Validate that port is on OVS
vif_port = self.agent.int_br.get_vif_port_by_id(port['id'])
if not vif_port:
return
if ext_sg.SECURITYGROUPS in port:
self.sg_agent.refresh_firewall()
class SecurityGroupAgentRpcCallback(sg_rpc.SecurityGroupAgentRpcCallbackMixin):
target = messaging.Target(version=sg_rpc.SG_RPC_VERSION)
def __init__(self, context, sg_agent):
super(SecurityGroupAgentRpcCallback, self).__init__()
self.context = context
self.sg_agent = sg_agent
class NECNeutronAgent(object):
def __init__(self, integ_br, root_helper, polling_interval):
'''Constructor.
:param integ_br: name of the integration bridge.
:param root_helper: utility to use when running shell cmds.
:param polling_interval: interval (secs) to check the bridge.
'''
self.int_br = ovs_lib.OVSBridge(integ_br, root_helper)
self.polling_interval = polling_interval
self.cur_ports = []
self.need_sync = True
self.datapath_id = "0x%s" % self.int_br.get_datapath_id()
self.agent_state = {
'binary': 'neutron-nec-agent',
'host': config.CONF.host,
'topic': q_const.L2_AGENT_TOPIC,
'configurations': {},
'agent_type': q_const.AGENT_TYPE_NEC,
'start_flag': True}
self.setup_rpc(root_helper)
def setup_rpc(self, root_helper):
self.host = socket.gethostname()
self.agent_id = 'nec-q-agent.%s' % self.host
LOG.info(_LI("RPC agent_id: %s"), self.agent_id)
self.topic = topics.AGENT
self.context = q_context.get_admin_context_without_session()
self.plugin_rpc = NECPluginApi(topics.PLUGIN)
self.state_rpc = agent_rpc.PluginReportStateAPI(topics.PLUGIN)
self.sg_plugin_rpc = sg_rpc.SecurityGroupServerRpcApi(topics.PLUGIN)
self.sg_agent = sg_rpc.SecurityGroupAgentRpc(self.context,
self.sg_plugin_rpc, root_helper)
# RPC network init
# Handle updates from service
self.callback_nec = NECAgentRpcCallback(self.context,
self, self.sg_agent)
self.callback_sg = SecurityGroupAgentRpcCallback(self.context,
self.sg_agent)
self.endpoints = [self.callback_nec, self.callback_sg]
# Define the listening consumer for the agent
consumers = [[topics.PORT, topics.UPDATE],
[topics.SECURITY_GROUP, topics.UPDATE]]
self.connection = agent_rpc.create_consumers(self.endpoints,
self.topic,
consumers)
report_interval = config.CONF.AGENT.report_interval
if report_interval:
heartbeat = loopingcall.FixedIntervalLoopingCall(
self._report_state)
heartbeat.start(interval=report_interval)
def _report_state(self):
try:
# How many devices are likely used by a VM
num_devices = len(self.cur_ports)
self.agent_state['configurations']['devices'] = num_devices
self.state_rpc.report_state(self.context,
self.agent_state)
self.agent_state.pop('start_flag', None)
except Exception:
LOG.exception(_LE("Failed reporting state!"))
def _vif_port_to_port_info(self, vif_port):
return dict(id=vif_port.vif_id, port_no=vif_port.ofport,
mac=vif_port.vif_mac)
def _process_security_group(self, port_added, port_removed):
if port_added:
devices_added = [p['id'] for p in port_added]
self.sg_agent.prepare_devices_filter(devices_added)
if port_removed:
self.sg_agent.remove_devices_filter(port_removed)
def loop_handler(self):
try:
# self.cur_ports will be kept until loop_handler succeeds.
cur_ports = [] if self.need_sync else self.cur_ports
new_ports = []
port_added = []
for vif_port in self.int_br.get_vif_ports():
port_id = vif_port.vif_id
new_ports.append(port_id)
if port_id not in cur_ports:
port_info = self._vif_port_to_port_info(vif_port)
port_added.append(port_info)
port_removed = []
for port_id in cur_ports:
if port_id not in new_ports:
port_removed.append(port_id)
if port_added or port_removed:
self.plugin_rpc.update_ports(self.context,
self.agent_id, self.datapath_id,
port_added, port_removed)
self._process_security_group(port_added, port_removed)
else:
LOG.debug("No port changed.")
self.cur_ports = new_ports
self.need_sync = False
except Exception:
LOG.exception(_LE("Error in agent event loop"))
self.need_sync = True
def daemon_loop(self):
"""Main processing loop for NEC Plugin Agent."""
while True:
self.loop_handler()
time.sleep(self.polling_interval)
def main():
common_config.init(sys.argv[1:])
common_config.setup_logging()
# Determine which agent type to use.
integ_br = config.OVS.integration_bridge
root_helper = config.AGENT.root_helper
polling_interval = config.AGENT.polling_interval
agent = NECNeutronAgent(integ_br, root_helper, polling_interval)
# Start everything.
agent.daemon_loop()
if __name__ == "__main__":
main()
|