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
|
#!/usr/bin/env python3
#
# Copyright (C) 2021 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 vyos.config import Config
from vyos.configverify import verify_interface_exists
from vyos.utils.dict import dict_search
from vyos.utils.process import process_named_running
from vyos.utils.file import read_file
from vyos.utils.process import call
from vyos.utils.process import run
from vyos.template import render
from vyos.template import get_ipv4
from vyos.utils.network import is_addr_assigned
from vyos import ConfigError
from vyos import airbag
airbag.enable()
config_file = '/run/conntrackd/conntrackd.conf'
def resync_vrrp():
tmp = run('/usr/libexec/vyos/conf_mode/high-availability.py')
if tmp > 0:
print('ERROR: error restarting VRRP daemon!')
def get_config(config=None):
if config:
conf = config
else:
conf = Config()
base = ['service', 'conntrack-sync']
if not conf.exists(base):
return None
conntrack = conf.get_config_dict(base, key_mangling=('-', '_'),
get_first_key=True, with_defaults=True)
conntrack['hash_size'] = read_file('/sys/module/nf_conntrack/parameters/hashsize')
conntrack['table_size'] = read_file('/proc/sys/net/netfilter/nf_conntrack_max')
conntrack['vrrp'] = conf.get_config_dict(['high-availability', 'vrrp', 'sync-group'],
get_first_key=True)
return conntrack
def verify(conntrack):
if not conntrack:
return None
if 'interface' not in conntrack:
raise ConfigError('Interface not defined!')
has_peer = False
for interface, interface_config in conntrack['interface'].items():
verify_interface_exists(conntrack, interface)
# Interface must not only exist, it must also carry an IP address
if len(get_ipv4(interface)) < 1:
raise ConfigError(f'Interface {interface} requires an IP address!')
if 'peer' in interface_config:
has_peer = True
# If one interface runs in unicast mode instead of multicast, so must all the
# others, else conntrackd will error out with: "cannot use UDP with other
# dedicated link protocols"
if has_peer:
for interface, interface_config in conntrack['interface'].items():
if 'peer' not in interface_config:
raise ConfigError('Can not mix unicast and multicast mode!')
if 'expect_sync' in conntrack:
if len(conntrack['expect_sync']) > 1 and 'all' in conntrack['expect_sync']:
raise ConfigError('Can not configure expect-sync "all" with other protocols!')
if 'listen_address' in conntrack:
for address in conntrack['listen_address']:
if not is_addr_assigned(address):
raise ConfigError(f'Specified listen-address {address} not assigned to any interface!')
vrrp_group = dict_search('failover_mechanism.vrrp.sync_group', conntrack)
if vrrp_group == None:
raise ConfigError(f'No VRRP sync-group defined!')
if vrrp_group not in conntrack['vrrp']:
raise ConfigError(f'VRRP sync-group {vrrp_group} not configured!')
return None
def generate(conntrack):
if not conntrack:
if os.path.isfile(config_file):
os.unlink(config_file)
return None
render(config_file, 'conntrackd/conntrackd.conf.j2', conntrack)
return None
def apply(conntrack):
systemd_service = 'conntrackd.service'
if not conntrack:
# Failover mechanism daemon should be indicated that it no longer needs
# to execute conntrackd actions on transition. This is only required
# once when conntrackd is stopped and taken out of service!
if process_named_running('conntrackd'):
resync_vrrp()
call(f'systemctl stop {systemd_service}')
return None
# Failover mechanism daemon should be indicated that it needs to execute
# conntrackd actions on transition. This is only required once when conntrackd
# is started the first time!
if not process_named_running('conntrackd'):
resync_vrrp()
call(f'systemctl reload-or-restart {systemd_service}')
return None
if __name__ == '__main__':
try:
c = get_config()
verify(c)
generate(c)
apply(c)
except ConfigError as e:
print(e)
exit(1)
|
