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
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
|
#!/usr/bin/env python3
#
# Copyright (C) 2021-2023 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
import socket
import json
from sys import exit
from shutil import rmtree
from vyos.config import Config
from vyos.configdict import dict_merge
from vyos.configdict import is_node_changed
from vyos.configverify import verify_vrf
from vyos.ifconfig import Section
from vyos.template import render
from vyos.util import call
from vyos.util import chown
from vyos.util import cmd
from vyos.xml import defaults
from vyos import ConfigError
from vyos import airbag
airbag.enable()
cache_dir = f'/etc/telegraf/.cache'
config_telegraf = f'/run/telegraf/telegraf.conf'
custom_scripts_dir = '/etc/telegraf/custom_scripts'
syslog_telegraf = '/etc/rsyslog.d/50-telegraf.conf'
systemd_override = '/run/systemd/system/telegraf.service.d/10-override.conf'
def get_nft_filter_chains():
""" Get nft chains for table filter """
try:
nft = cmd('nft --json list table ip vyos_filter')
except Exception:
print('nft table ip vyos_filter not found')
return []
nft = json.loads(nft)
chain_list = []
for output in nft['nftables']:
if 'chain' in output:
chain = output['chain']['name']
chain_list.append(chain)
return chain_list
def get_hostname() -> str:
try:
hostname = socket.getfqdn()
except socket.gaierror:
hostname = socket.gethostname()
return hostname
def get_config(config=None):
if config:
conf = config
else:
conf = Config()
base = ['service', 'monitoring', 'telegraf']
if not conf.exists(base):
return None
monitoring = conf.get_config_dict(base, key_mangling=('-', '_'),
get_first_key=True,
no_tag_node_value_mangle=True)
tmp = is_node_changed(conf, base + ['vrf'])
if tmp: monitoring.update({'restart_required': {}})
# We have gathered the dict representation of the CLI, but there are default
# options which we need to update into the dictionary retrived.
default_values = defaults(base)
monitoring = dict_merge(default_values, monitoring)
monitoring['custom_scripts_dir'] = custom_scripts_dir
monitoring['hostname'] = get_hostname()
monitoring['interfaces_ethernet'] = Section.interfaces('ethernet', vlan=False)
monitoring['nft_chains'] = get_nft_filter_chains()
# Redefine azure group-metrics 'single-table' and 'table-per-metric'
if 'azure_data_explorer' in monitoring:
if 'single-table' in monitoring['azure_data_explorer']['group_metrics']:
monitoring['azure_data_explorer']['group_metrics'] = 'SingleTable'
else:
monitoring['azure_data_explorer']['group_metrics'] = 'TablePerMetric'
# Set azure env
if 'authentication' in monitoring['azure_data_explorer']:
auth_config = monitoring['azure_data_explorer']['authentication']
if {'client_id', 'client_secret', 'tenant_id'} <= set(auth_config):
os.environ['AZURE_CLIENT_ID'] = auth_config['client_id']
os.environ['AZURE_CLIENT_SECRET'] = auth_config['client_secret']
os.environ['AZURE_TENANT_ID'] = auth_config['tenant_id']
# Ignore default XML values if config doesn't exists
# Delete key from dict
if not conf.exists(base + ['influxdb']):
del monitoring['influxdb']
if not conf.exists(base + ['prometheus-client']):
del monitoring['prometheus_client']
if not conf.exists(base + ['azure-data-explorer']):
del monitoring['azure_data_explorer']
return monitoring
def verify(monitoring):
# bail out early - looks like removal from running config
if not monitoring:
return None
verify_vrf(monitoring)
# Verify influxdb
if 'influxdb' in monitoring:
if 'authentication' not in monitoring['influxdb'] or \
'organization' not in monitoring['influxdb']['authentication'] or \
'token' not in monitoring['influxdb']['authentication']:
raise ConfigError(f'influxdb authentication "organization and token" are mandatory!')
if 'url' not in monitoring['influxdb']:
raise ConfigError(f'Monitoring influxdb "url" is mandatory!')
# Verify azure-data-explorer
if 'azure_data_explorer' in monitoring:
if 'authentication' not in monitoring['azure_data_explorer'] or \
'client_id' not in monitoring['azure_data_explorer']['authentication'] or \
'client_secret' not in monitoring['azure_data_explorer']['authentication'] or \
'tenant_id' not in monitoring['azure_data_explorer']['authentication']:
raise ConfigError(f'Authentication "client-id, client-secret and tenant-id" are mandatory!')
if 'database' not in monitoring['azure_data_explorer']:
raise ConfigError(f'Monitoring "database" is mandatory!')
if 'url' not in monitoring['azure_data_explorer']:
raise ConfigError(f'Monitoring "url" is mandatory!')
if monitoring['azure_data_explorer']['group_metrics'] == 'SingleTable' and \
'table' not in monitoring['azure_data_explorer']:
raise ConfigError(f'Monitoring "table" name for single-table mode is mandatory!')
# Verify Splunk
if 'splunk' in monitoring:
if 'authentication' not in monitoring['splunk'] or \
'token' not in monitoring['splunk']['authentication']:
raise ConfigError(f'Authentication "organization and token" are mandatory!')
if 'url' not in monitoring['splunk']:
raise ConfigError(f'Monitoring splunk "url" is mandatory!')
return None
def generate(monitoring):
if not monitoring:
# Delete config and systemd files
config_files = [config_telegraf, systemd_override, syslog_telegraf]
for file in config_files:
if os.path.isfile(file):
os.unlink(file)
# Delete old directories
if os.path.isdir(cache_dir):
rmtree(cache_dir, ignore_errors=True)
return None
# Create telegraf cache dir
if not os.path.exists(cache_dir):
os.makedirs(cache_dir)
chown(cache_dir, 'telegraf', 'telegraf')
# Create custome scripts dir
if not os.path.exists(custom_scripts_dir):
os.mkdir(custom_scripts_dir)
# Render telegraf configuration and systemd override
render(config_telegraf, 'telegraf/telegraf.j2', monitoring, user='telegraf', group='telegraf')
render(systemd_override, 'telegraf/override.conf.j2', monitoring)
render(syslog_telegraf, 'telegraf/syslog_telegraf.j2', monitoring)
return None
def apply(monitoring):
# Reload systemd manager configuration
systemd_service = 'telegraf.service'
call('systemctl daemon-reload')
if not monitoring:
call(f'systemctl stop {systemd_service}')
return
# we need to restart the service if e.g. the VRF name changed
systemd_action = 'reload-or-restart'
if 'restart_required' in monitoring:
systemd_action = 'restart'
call(f'systemctl {systemd_action} {systemd_service}')
# Telegraf include custom rsyslog config changes
call('systemctl reload-or-restart rsyslog')
if __name__ == '__main__':
try:
c = get_config()
verify(c)
generate(c)
apply(c)
except ConfigError as e:
print(e)
exit(1)
|