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
|
#!/usr/bin/env python3
#
# Copyright (C) 2019 VyOS maintainers and contributors
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 or later as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import os
from sys import exit
from copy import deepcopy
from netifaces import interfaces
from vyos.config import Config
from vyos.ifconfig import GeneveIf
from vyos.validate import is_member
from vyos import ConfigError
default_config_data = {
'address': [],
'deleted': False,
'description': '',
'disable': False,
'intf': '',
'ip_arp_cache_tmo': 30,
'ip_proxy_arp': 0,
'is_bridge_member': False,
'mtu': 1500,
'remote': '',
'vni': ''
}
def get_config():
geneve = deepcopy(default_config_data)
conf = Config()
# determine tagNode instance
if 'VYOS_TAGNODE_VALUE' not in os.environ:
raise ConfigError('Interface (VYOS_TAGNODE_VALUE) not specified')
geneve['intf'] = os.environ['VYOS_TAGNODE_VALUE']
# check if interface is member if a bridge
geneve['is_bridge_member'] = is_member(conf, geneve['intf'], 'bridge')
# Check if interface has been removed
if not conf.exists('interfaces geneve ' + geneve['intf']):
geneve['deleted'] = True
return geneve
# set new configuration level
conf.set_level('interfaces geneve ' + geneve['intf'])
# retrieve configured interface addresses
if conf.exists('address'):
geneve['address'] = conf.return_values('address')
# retrieve interface description
if conf.exists('description'):
geneve['description'] = conf.return_value('description')
# Disable this interface
if conf.exists('disable'):
geneve['disable'] = True
# ARP cache entry timeout in seconds
if conf.exists('ip arp-cache-timeout'):
geneve['ip_arp_cache_tmo'] = int(conf.return_value('ip arp-cache-timeout'))
# Enable proxy-arp on this interface
if conf.exists('ip enable-proxy-arp'):
geneve['ip_proxy_arp'] = 1
# Maximum Transmission Unit (MTU)
if conf.exists('mtu'):
geneve['mtu'] = int(conf.return_value('mtu'))
# Remote address of GENEVE tunnel
if conf.exists('remote'):
geneve['remote'] = conf.return_value('remote')
# Virtual Network Identifier
if conf.exists('vni'):
geneve['vni'] = conf.return_value('vni')
return geneve
def verify(geneve):
if geneve['deleted']:
if geneve['is_bridge_member']:
raise ConfigError((
f'Cannot delete interface "{geneve["intf"]}" as it is a '
f'member of bridge "{geneve["is_bridge_member"]}"!'))
return None
if geneve['is_bridge_member'] and geneve['address']:
raise ConfigError((
f'Cannot assign address to interface "{geneve["intf"]}" '
f'as it is a member of bridge "{geneve["is_bridge_member"]}"!'))
if not geneve['remote']:
raise ConfigError('GENEVE remote must be configured')
if not geneve['vni']:
raise ConfigError('GENEVE VNI must be configured')
return None
def generate(geneve):
return None
def apply(geneve):
# Check if GENEVE interface already exists
if geneve['intf'] in interfaces():
g = GeneveIf(geneve['intf'])
# GENEVE is super picky and the tunnel always needs to be recreated,
# thus we can simply always delete it first.
g.remove()
if not geneve['deleted']:
# GENEVE interface needs to be created on-block
# instead of passing a ton of arguments, I just use a dict
# that is managed by vyos.ifconfig
conf = deepcopy(GeneveIf.get_config())
# Assign GENEVE instance configuration parameters to config dict
conf['vni'] = geneve['vni']
conf['remote'] = geneve['remote']
# Finally create the new interface
g = GeneveIf(geneve['intf'], **conf)
# update interface description used e.g. by SNMP
g.set_alias(geneve['description'])
# Maximum Transfer Unit (MTU)
g.set_mtu(geneve['mtu'])
# configure ARP cache timeout in milliseconds
g.set_arp_cache_tmo(geneve['ip_arp_cache_tmo'])
# Enable proxy-arp on this interface
g.set_proxy_arp(geneve['ip_proxy_arp'])
# Configure interface address(es) - no need to implicitly delete the
# old addresses as they have already been removed by deleting the
# interface above
for addr in geneve['address']:
g.add_addr(addr)
# As the GENEVE interface is always disabled first when changing
# parameters we will only re-enable the interface if it is not
# administratively disabled
if not geneve['disable']:
g.set_admin_state('up')
# re-add ourselves to any bridge we might have fallen out of
if geneve['is_bridge_member']:
g.add_to_bridge(geneve['is_bridge_member'])
return None
if __name__ == '__main__':
try:
c = get_config()
verify(c)
generate(c)
apply(c)
except ConfigError as e:
print(e)
exit(1)
|
