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#!/usr/bin/env python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
#
# Copyright 2012 Isaku Yamahata <yamahata at private email ne jp>
# Based on openvswitch agent.
#
# Copyright 2011 Nicira Networks, 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.
# @author: Isaku Yamahata
import httplib
import socket
import sys
import netifaces
from ryu.app import client
from ryu.app import conf_switch_key
from ryu.app import rest_nw_id
from sqlalchemy.ext.sqlsoup import SqlSoup
from quantum.agent.linux import ovs_lib
from quantum.agent.linux.ovs_lib import VifPort
from quantum.common import config as logging_config
from quantum.openstack.common import cfg
from quantum.openstack.common.cfg import NoSuchGroupError
from quantum.openstack.common.cfg import NoSuchOptError
from quantum.openstack.common import log as LOG
from quantum.plugins.ryu.common import config
# This is copied of nova.flags._get_my_ip()
# Agent shouldn't depend on nova module
def _get_my_ip():
"""
Returns the actual ip of the local machine.
This code figures out what source address would be used if some traffic
were to be sent out to some well known address on the Internet. In this
case, a Google DNS server is used, but the specific address does not
matter much. No traffic is actually sent.
"""
csock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
csock.connect(('8.8.8.8', 80))
(addr, _port) = csock.getsockname()
csock.close()
return addr
def _get_ip(cfg_ip_str, cfg_interface_str):
ip = None
try:
ip = getattr(cfg.CONF.OVS, cfg_ip_str)
except (NoSuchOptError, NoSuchGroupError):
pass
if ip:
return ip
iface = None
try:
iface = getattr(cfg.CONF.OVS, cfg_interface_str)
except (NoSuchOptError, NoSuchGroupError):
pass
if iface:
iface = netifaces.ifaddresses(iface)[netifaces.AF_INET][0]
return iface['addr']
return _get_my_ip()
def _get_tunnel_ip():
return _get_ip('tunnel_ip', 'tunnel_interface')
def _get_ovsdb_ip():
return _get_ip('ovsdb_ip', 'ovsdb_interface')
class OVSBridge(ovs_lib.OVSBridge):
def __init__(self, br_name, root_helper):
ovs_lib.OVSBridge.__init__(self, br_name, root_helper)
self.datapath_id = None
def find_datapath_id(self):
self.datapath_id = self.get_datapath_id()
def set_manager(self, target):
self.run_vsctl(["set-manager", target])
def get_ofport(self, name):
return self.db_get_val("Interface", name, "ofport")
def _get_ports(self, get_port):
ports = []
port_names = self.get_port_name_list()
for name in port_names:
if self.get_ofport(name) < 0:
continue
port = get_port(name)
if port:
ports.append(port)
return ports
def _get_external_port(self, name):
# exclude vif ports
external_ids = self.db_get_map("Interface", name, "external_ids")
if external_ids:
return
# exclude tunnel ports
options = self.db_get_map("Interface", name, "options")
if "remote_ip" in options:
return
ofport = self.get_ofport(name)
return VifPort(name, ofport, None, None, self)
def get_external_ports(self):
return self._get_ports(self._get_external_port)
class VifPortSet(object):
def __init__(self, int_br, ryu_rest_client):
super(VifPortSet, self).__init__()
self.int_br = int_br
self.api = ryu_rest_client
def setup(self):
for port in self.int_br.get_external_ports():
LOG.debug(_('external port %s'), port)
self.api.update_port(rest_nw_id.NW_ID_EXTERNAL,
port.switch.datapath_id, port.ofport)
class OVSQuantumOFPRyuAgent(object):
def __init__(self, integ_br, ofp_rest_api_addr,
tunnel_ip, ovsdb_ip, ovsdb_port,
root_helper):
super(OVSQuantumOFPRyuAgent, self).__init__()
self.int_br = None
self.vif_ports = None
self._setup_integration_br(root_helper, integ_br,
ofp_rest_api_addr,
tunnel_ip, ovsdb_port, ovsdb_ip)
def _setup_integration_br(self, root_helper, integ_br,
ofp_rest_api_addr,
tunnel_ip, ovsdb_port, ovsdb_ip):
self.int_br = OVSBridge(integ_br, root_helper)
self.int_br.find_datapath_id()
ryu_rest_client = client.OFPClient(ofp_rest_api_addr)
self.vif_ports = VifPortSet(self.int_br, ryu_rest_client)
self.vif_ports.setup()
sc_client = client.SwitchConfClient(ofp_rest_api_addr)
sc_client.set_key(self.int_br.datapath_id,
conf_switch_key.OVS_TUNNEL_ADDR, tunnel_ip)
# Currently Ryu supports only tcp methods. (ssl isn't supported yet)
self.int_br.set_manager('ptcp:%d' % ovsdb_port)
sc_client.set_key(self.int_br.datapath_id, conf_switch_key.OVSDB_ADDR,
'tcp:%s:%d' % (ovsdb_ip, ovsdb_port))
def check_ofp_rest_api_addr(db):
LOG.debug("checking db")
servers = db.ofp_server.all()
ofp_controller_addr = None
ofp_rest_api_addr = None
for serv in servers:
if serv.host_type == "REST_API":
ofp_rest_api_addr = serv.address
elif serv.host_type == "controller":
ofp_controller_addr = serv.address
else:
LOG.warn(_("ignoring unknown server type %s"), serv)
LOG.debug("api %s", ofp_rest_api_addr)
if ofp_controller_addr:
LOG.warn(_('OF controller parameter is stale %s'), ofp_controller_addr)
if not ofp_rest_api_addr:
raise RuntimeError(_("Ryu rest API port isn't specified"))
LOG.debug(_("going to ofp controller mode %s"), ofp_rest_api_addr)
return ofp_rest_api_addr
def main():
cfg.CONF(args=sys.argv, project='quantum')
# (TODO) gary - swap with common logging
logging_config.setup_logging(cfg.CONF)
integ_br = cfg.CONF.OVS.integration_bridge
root_helper = cfg.CONF.AGENT.root_helper
options = {"sql_connection": cfg.CONF.DATABASE.sql_connection}
db = SqlSoup(options["sql_connection"])
LOG.info(_("Connecting to database \"%(database)s\" on %(host)s") %
{"database": db.engine.url.database,
"host": db.engine.url.host})
ofp_rest_api_addr = check_ofp_rest_api_addr(db)
tunnel_ip = _get_tunnel_ip()
LOG.debug(_('tunnel_ip %s'), tunnel_ip)
ovsdb_port = cfg.CONF.OVS.ovsdb_port
LOG.debug(_('ovsdb_port %s'), ovsdb_port)
ovsdb_ip = _get_ovsdb_ip()
LOG.debug(_('ovsdb_ip %s'), ovsdb_ip)
try:
OVSQuantumOFPRyuAgent(integ_br, ofp_rest_api_addr,
tunnel_ip, ovsdb_ip, ovsdb_port, root_helper)
except httplib.HTTPException, e:
LOG.error(_("initialization failed: %s"), e)
sys.exit(1)
LOG.info(_("Ryu initialization on the node is done."
" Now Ryu agent exits successfully."))
sys.exit(0)
if __name__ == "__main__":
main()
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