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-rwxr-xr-xsrc/conf_mode/service_monitoring_telegraf.py154
1 files changed, 154 insertions, 0 deletions
diff --git a/src/conf_mode/service_monitoring_telegraf.py b/src/conf_mode/service_monitoring_telegraf.py
new file mode 100755
index 000000000..a1e7a7286
--- /dev/null
+++ b/src/conf_mode/service_monitoring_telegraf.py
@@ -0,0 +1,154 @@
+#!/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
+import json
+
+from sys import exit
+from shutil import rmtree
+
+from vyos.config import Config
+from vyos.configdict import dict_merge
+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()
+
+
+base_dir = '/run/telegraf'
+cache_dir = f'/etc/telegraf/.cache'
+config_telegraf = f'{base_dir}/vyos-telegraf.conf'
+custom_scripts_dir = '/etc/telegraf/custom_scripts'
+syslog_telegraf = '/etc/rsyslog.d/50-telegraf.conf'
+systemd_telegraf_service = '/etc/systemd/system/vyos-telegraf.service'
+systemd_telegraf_override_dir = '/etc/systemd/system/vyos-telegraf.service.d'
+systemd_override = f'{systemd_telegraf_override_dir}/10-override.conf'
+
+
+def get_nft_filter_chains():
+ """
+ Get nft chains for table filter
+ """
+ nft = cmd('nft --json list table ip filter')
+ 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_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)
+
+ # 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['nft_chains'] = get_nft_filter_chains()
+ monitoring['custom_scripts_dir'] = custom_scripts_dir
+
+ return monitoring
+
+def verify(monitoring):
+ # bail out early - looks like removal from running config
+ if not monitoring:
+ return None
+
+ if 'authentication' not in monitoring or \
+ 'organization' not in monitoring['authentication'] or \
+ 'token' not in monitoring['authentication']:
+ raise ConfigError(f'Authentication "organization and token" are mandatory!')
+
+ if 'url' not in monitoring:
+ raise ConfigError(f'Monitoring "url" is mandatory!')
+
+ return None
+
+def generate(monitoring):
+ if not monitoring:
+ # Delete config and systemd files
+ config_files = [config_telegraf, systemd_telegraf_service, 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 systemd override dir
+ if not os.path.exists(systemd_telegraf_override_dir):
+ os.mkdir(systemd_telegraf_override_dir)
+
+ # 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, 'monitoring/telegraf.tmpl', monitoring)
+ render(systemd_telegraf_service, 'monitoring/systemd_vyos_telegraf_service.tmpl', monitoring)
+ render(systemd_override, 'monitoring/override.conf.tmpl', monitoring, permission=0o640)
+ render(syslog_telegraf, 'monitoring/syslog_telegraf.tmpl', monitoring)
+
+ chown(base_dir, 'telegraf', 'telegraf')
+
+ return None
+
+def apply(monitoring):
+ # Reload systemd manager configuration
+ call('systemctl daemon-reload')
+ if monitoring:
+ call('systemctl restart vyos-telegraf.service')
+ else:
+ call('systemctl stop vyos-telegraf.service')
+ # Telegraf include custom rsyslog config changes
+ call('systemctl restart rsyslog')
+
+if __name__ == '__main__':
+ try:
+ c = get_config()
+ verify(c)
+ generate(c)
+ apply(c)
+ except ConfigError as e:
+ print(e)
+ exit(1)