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
|
#!/usr/bin/env python3
#
# Copyright (C) 2023-2024 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 shutil import rmtree
from vyos.config import Config
from vyos.configverify import verify_pki_certificate
from vyos.configverify import verify_pki_ca_certificate
from vyos.utils.dict import dict_search
from vyos.utils.process import call
from vyos.utils.network import check_port_availability
from vyos.utils.network import is_listen_port_bind_service
from vyos.pki import find_chain
from vyos.pki import load_certificate
from vyos.pki import load_private_key
from vyos.pki import encode_certificate
from vyos.pki import encode_private_key
from vyos.template import render
from vyos.utils.file import write_file
from vyos import ConfigError
from vyos import airbag
airbag.enable()
load_balancing_dir = '/run/haproxy'
load_balancing_conf_file = f'{load_balancing_dir}/haproxy.cfg'
systemd_service = 'haproxy.service'
systemd_override = '/run/systemd/system/haproxy.service.d/10-override.conf'
def get_config(config=None):
if config:
conf = config
else:
conf = Config()
base = ['load-balancing', 'haproxy']
if not conf.exists(base):
return None
lb = conf.get_config_dict(base,
get_first_key=True,
key_mangling=('-', '_'),
no_tag_node_value_mangle=True,
with_recursive_defaults=True,
with_pki=True)
return lb
def verify(lb):
if not lb:
return None
if 'backend' not in lb or 'service' not in lb:
raise ConfigError(f'"service" and "backend" must be configured!')
for front, front_config in lb['service'].items():
if 'port' not in front_config:
raise ConfigError(f'"{front} service port" must be configured!')
# Check if bind address:port are used by another service
tmp_address = front_config.get('address', '0.0.0.0')
tmp_port = front_config['port']
if check_port_availability(tmp_address, int(tmp_port), 'tcp') is not True and \
not is_listen_port_bind_service(int(tmp_port), 'haproxy'):
raise ConfigError(f'"TCP" port "{tmp_port}" is used by another service')
for back, back_config in lb['backend'].items():
if 'http_check' in back_config:
http_check = back_config['http_check']
if 'expect' in http_check and 'status' in http_check['expect'] and 'string' in http_check['expect']:
raise ConfigError(f'"expect status" and "expect string" can not be configured together!')
if 'health_check' in back_config:
if back_config['mode'] != 'tcp':
raise ConfigError(f'backend "{back}" can only be configured with {back_config["health_check"]} ' +
f'health-check whilst in TCP mode!')
if 'http_check' in back_config:
raise ConfigError(f'backend "{back}" cannot be configured with both http-check and health-check!')
if 'server' not in back_config:
raise ConfigError(f'"{back} server" must be configured!')
for bk_server, bk_server_conf in back_config['server'].items():
if 'address' not in bk_server_conf or 'port' not in bk_server_conf:
raise ConfigError(f'"backend {back} server {bk_server} address and port" must be configured!')
if {'send_proxy', 'send_proxy_v2'} <= set(bk_server_conf):
raise ConfigError(f'Cannot use both "send-proxy" and "send-proxy-v2" for server "{bk_server}"')
if 'ssl' in back_config:
if {'no_verify', 'ca_certificate'} <= set(back_config['ssl']):
raise ConfigError(f'backend {back} cannot have both ssl options no-verify and ca-certificate set!')
# Check if http-response-headers are configured in any frontend/backend where mode != http
for group in ['service', 'backend']:
for config_name, config in lb[group].items():
if 'http_response_headers' in config and config['mode'] != 'http':
raise ConfigError(f'{group} {config_name} must be set to http mode to use http_response_headers!')
for front, front_config in lb['service'].items():
for cert in dict_search('ssl.certificate', front_config) or []:
verify_pki_certificate(lb, cert)
for back, back_config in lb['backend'].items():
tmp = dict_search('ssl.ca_certificate', back_config)
if tmp: verify_pki_ca_certificate(lb, tmp)
def generate(lb):
if not lb:
# Delete /run/haproxy/haproxy.cfg
config_files = [load_balancing_conf_file, systemd_override]
for file in config_files:
if os.path.isfile(file):
os.unlink(file)
# Delete old directories
if os.path.isdir(load_balancing_dir):
rmtree(load_balancing_dir, ignore_errors=True)
return None
# Create load-balance dir
if not os.path.isdir(load_balancing_dir):
os.mkdir(load_balancing_dir)
loaded_ca_certs = {load_certificate(c['certificate'])
for c in lb['pki']['ca'].values()} if 'ca' in lb['pki'] else {}
# SSL Certificates for frontend
for front, front_config in lb['service'].items():
if 'ssl' not in front_config:
continue
if 'certificate' in front_config['ssl']:
cert_names = front_config['ssl']['certificate']
for cert_name in cert_names:
pki_cert = lb['pki']['certificate'][cert_name]
cert_file_path = os.path.join(load_balancing_dir, f'{cert_name}.pem')
cert_key_path = os.path.join(load_balancing_dir, f'{cert_name}.pem.key')
loaded_pki_cert = load_certificate(pki_cert['certificate'])
cert_full_chain = find_chain(loaded_pki_cert, loaded_ca_certs)
write_file(cert_file_path,
'\n'.join(encode_certificate(c) for c in cert_full_chain))
if 'private' in pki_cert and 'key' in pki_cert['private']:
loaded_key = load_private_key(pki_cert['private']['key'], passphrase=None, wrap_tags=True)
key_pem = encode_private_key(loaded_key, passphrase=None)
write_file(cert_key_path, key_pem)
# SSL Certificates for backend
for back, back_config in lb['backend'].items():
if 'ssl' not in back_config:
continue
if 'ca_certificate' in back_config['ssl']:
ca_name = back_config['ssl']['ca_certificate']
ca_cert_file_path = os.path.join(load_balancing_dir, f'{ca_name}.pem')
ca_chains = []
pki_ca_cert = lb['pki']['ca'][ca_name]
loaded_ca_cert = load_certificate(pki_ca_cert['certificate'])
ca_full_chain = find_chain(loaded_ca_cert, loaded_ca_certs)
ca_chains.append('\n'.join(encode_certificate(c) for c in ca_full_chain))
write_file(ca_cert_file_path, '\n'.join(ca_chains))
render(load_balancing_conf_file, 'load-balancing/haproxy.cfg.j2', lb)
render(systemd_override, 'load-balancing/override_haproxy.conf.j2', lb)
return None
def apply(lb):
call('systemctl daemon-reload')
if not lb:
call(f'systemctl stop {systemd_service}')
else:
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)
|
