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# Copyright (C) 2015 Nippon Telegraph and Telephone Corporation.
#
# 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.
from __future__ import absolute_import
from itertools import chain
import time
from fabric import colors
from fabric.api import local
from lib.base import (
BGPContainer,
CmdBuffer,
try_several_times,
)
class ExaBGPContainer(BGPContainer):
SHARED_VOLUME = '/root/shared_volume'
def __init__(self, name, asn, router_id, ctn_image_name='osrg/exabgp',
exabgp_path=''):
super(ExaBGPContainer, self).__init__(name, asn, router_id,
ctn_image_name)
self.shared_volumes.append((self.config_dir, self.SHARED_VOLUME))
self.exabgp_path = exabgp_path
def _start_exabgp(self):
cmd = CmdBuffer(' ')
cmd << 'env exabgp.log.destination={0}/exabgpd.log'.format(self.SHARED_VOLUME)
cmd << "exabgp.tcp.bind='0.0.0.0' exabgp.tcp.port=179"
cmd << './exabgp/sbin/exabgp {0}/exabgpd.conf'.format(self.SHARED_VOLUME)
self.local(str(cmd), detach=True)
def _update_exabgp(self):
if self.exabgp_path == '':
return
c = CmdBuffer()
c << '#!/bin/bash'
remotepath = '/root/exabgp'
localpath = self.exabgp_path
local('cp -r {0} {1}'.format(localpath, self.config_dir))
c << 'cp {0}/etc/exabgp/exabgp.env {1}'.format(remotepath, self.SHARED_VOLUME)
c << 'sed -i -e \'s/all = false/all = true/g\' {0}/exabgp.env'.format(self.SHARED_VOLUME)
c << 'cp -r {0}/exabgp {1}'.format(self.SHARED_VOLUME,
remotepath[:-1 * len('exabgp')])
c << 'cp {0}/exabgp.env {1}/etc/exabgp/'.format(self.SHARED_VOLUME, remotepath)
cmd = 'echo "{0:s}" > {1}/update.sh'.format(c, self.config_dir)
local(cmd, capture=True)
cmd = 'chmod 755 {0}/update.sh'.format(self.config_dir)
local(cmd, capture=True)
cmd = '{0}/update.sh'.format(self.SHARED_VOLUME)
self.local(cmd)
def run(self):
super(ExaBGPContainer, self).run()
self._update_exabgp()
self._start_exabgp()
return self.WAIT_FOR_BOOT
def create_config(self):
cmd = CmdBuffer()
for peer, info in self.peers.iteritems():
cmd << 'neighbor {0} {{'.format(info['neigh_addr'].split('/')[0])
cmd << ' router-id {0};'.format(self.router_id)
cmd << ' local-address {0};'.format(info['local_addr'].split('/')[0])
cmd << ' local-as {0};'.format(self.asn)
cmd << ' peer-as {0};'.format(peer.asn)
if info['as2']:
cmd << ' capability {'
cmd << ' asn4 disable;'
cmd << ' }'
if info['passwd']:
cmd << ' md5 "{0}";'.format(info['passwd'])
if info['passive']:
cmd << ' passive;'
if info['addpath']:
cmd << ' add-path send/receive;'
routes = [r for r in chain.from_iterable(self.routes.itervalues()) if r['rf'] == 'ipv4' or r['rf'] == 'ipv6']
if len(routes) > 0:
cmd << ' static {'
for route in routes:
r = CmdBuffer(' ')
nexthop = info['local_addr'].split('/')[0]
if route['next-hop']:
nexthop = route['next-hop']
r << ' route {0} next-hop {1}'.format(route['prefix'], nexthop)
if route['as-path']:
r << 'as-path [{0}]'.format(' '.join(str(i) for i in route['as-path']))
if route['community']:
r << 'community [{0}]'.format(' '.join(c for c in route['community']))
if route['med']:
r << 'med {0}'.format(route['med'])
if route['local-pref']:
r << 'local-preference {0}'.format(route['local-pref'])
if route['extended-community']:
r << 'extended-community [{0}]'.format(route['extended-community'])
if route['attr']:
r << 'attribute [ {0} ]'.format(route['attr'])
if route['identifier']:
r << 'path-information {0}'.format(route['identifier'])
cmd << '{0};'.format(str(r))
cmd << ' }'
routes = self._extract_routes(['ipv4-flowspec', 'ipv6-flowspec'])
for key, routes in routes.items():
cmd << ' flow {'
for route in routes:
cmd << ' route {0} {{'.format(key)
cmd << ' match {'
for match in route['matchs']:
cmd << ' {0};'.format(match)
# cmd << ' source {0};'.format(route['prefix'])
# cmd << ' destination 192.168.0.1/32;'
# cmd << ' destination-port =3128 >8080&<8088;'
# cmd << ' source-port >1024;'
# cmd << ' port =14 =15 >10&<156;'
# cmd << ' protocol udp;' # how to specify multiple ip protocols
# cmd << ' packet-length >1000&<2000;'
# cmd << ' tcp-flags !syn;'
cmd << ' }'
cmd << ' then {'
for then in route['thens']:
cmd << ' {0};'.format(then)
# cmd << ' accept;'
# cmd << ' discard;'
# cmd << ' rate-limit 9600;'
# cmd << ' redirect 1.2.3.4:100;'
# cmd << ' redirect 100:100;'
# cmd << ' mark 10;'
# cmd << ' action sample-terminal;'
cmd << ' }'
cmd << ' }'
cmd << ' }'
cmd << '}'
with open('{0}/exabgpd.conf'.format(self.config_dir), 'w') as f:
print colors.yellow('[{0}\'s new exabgpd.conf]'.format(self.name))
print colors.yellow(str(cmd))
f.write(str(cmd))
def reload_config(self):
if len(self.peers) == 0:
return
def _reload():
def _is_running():
ps = self.local('ps', capture=True)
running = False
for line in ps.split('\n')[1:]:
if 'python' in line:
running = True
return running
if _is_running():
self.local('/usr/bin/pkill python -SIGUSR1')
else:
self._start_exabgp()
time.sleep(1)
if not _is_running():
raise RuntimeError()
try_several_times(_reload)
class RawExaBGPContainer(ExaBGPContainer):
def __init__(self, name, config, ctn_image_name='osrg/exabgp',
exabgp_path=''):
asn = None
router_id = None
for line in config.split('\n'):
line = line.strip()
if line.startswith('local-as'):
asn = int(line[len('local-as'):].strip('; '))
if line.startswith('router-id'):
router_id = line[len('router-id'):].strip('; ')
if not asn:
raise Exception('asn not in exabgp config')
if not router_id:
raise Exception('router-id not in exabgp config')
self.config = config
super(RawExaBGPContainer, self).__init__(name, asn, router_id,
ctn_image_name, exabgp_path)
def create_config(self):
with open('{0}/exabgpd.conf'.format(self.config_dir), 'w') as f:
print colors.yellow('[{0}\'s new exabgpd.conf]'.format(self.name))
print colors.yellow(self.config)
f.write(self.config)
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