diff options
| -rw-r--r-- | data/templates/node_exporter/node_exporter.service.j2 | 17 | ||||
| -rw-r--r-- | debian/vyos-1x.postinst | 5 | ||||
| -rw-r--r-- | interface-definitions/service_monitoring_node_exporter.xml.in | 28 | ||||
| -rwxr-xr-x | smoketest/scripts/cli/test_service_monitoring_node-exporter.py | 64 | ||||
| -rwxr-xr-x | src/conf_mode/service_monitoring_node-exporter.py | 104 |
5 files changed, 218 insertions, 0 deletions
diff --git a/data/templates/node_exporter/node_exporter.service.j2 b/data/templates/node_exporter/node_exporter.service.j2 new file mode 100644 index 000000000..01dad5aa2 --- /dev/null +++ b/data/templates/node_exporter/node_exporter.service.j2 @@ -0,0 +1,17 @@ +{% set vrf_command = 'ip vrf exec ' ~ vrf ~ ' runuser -u node_exporter -- ' if vrf is vyos_defined else '' %} +[Unit] +Description=Node Exporter +Documentation=https://github.com/prometheus/node_exporter +After=network.target + +[Service] +{% if vrf is not vyos_defined %} +User=node_exporter +{% endif %} +ExecStart={{ vrf_command }}/usr/sbin/node_exporter \ +{% for address in listen_address %} + --web.listen-address={{ address }}:{{ port }} +{% endfor %} + +[Install] +WantedBy=multi-user.target diff --git a/debian/vyos-1x.postinst b/debian/vyos-1x.postinst index dc8ada267..d83634cfc 100644 --- a/debian/vyos-1x.postinst +++ b/debian/vyos-1x.postinst @@ -21,6 +21,11 @@ if ! grep -q '^openvpn' /etc/passwd; then adduser --quiet --firstuid 100 --system --group --shell /usr/sbin/nologin openvpn fi +# node_exporter should get its own user +if ! grep -q '^node_exporter' /etc/passwd; then + adduser --quiet --firstuid 100 --system --group --shell /bin/false node_exporter +fi + # We need to have a group for RADIUS service users to use it inside PAM rules if ! grep -q '^radius' /etc/group; then addgroup --firstgid 1000 --quiet radius diff --git a/interface-definitions/service_monitoring_node_exporter.xml.in b/interface-definitions/service_monitoring_node_exporter.xml.in new file mode 100644 index 000000000..ee6d06d6d --- /dev/null +++ b/interface-definitions/service_monitoring_node_exporter.xml.in @@ -0,0 +1,28 @@ +<?xml version="1.0"?> +<interfaceDefinition> + <node name="service"> + <children> + <node name="monitoring"> + <children> + <node name="node-exporter" owner="${vyos_conf_scripts_dir}/service_monitoring_node-exporter.py"> + <properties> + <help>Prometheus exporter for hardware and operating system metrics</help> + <priority>1280</priority> + </properties> + <children> + #include <include/listen-address.xml.i> + <leafNode name="listen-address"> + <defaultValue>0.0.0.0</defaultValue> + </leafNode> + #include <include/port-number.xml.i> + <leafNode name="port"> + <defaultValue>9100</defaultValue> + </leafNode> + #include <include/interface/vrf.xml.i> + </children> + </node> + </children> + </node> + </children> + </node> +</interfaceDefinition> diff --git a/smoketest/scripts/cli/test_service_monitoring_node-exporter.py b/smoketest/scripts/cli/test_service_monitoring_node-exporter.py new file mode 100755 index 000000000..6b96e3130 --- /dev/null +++ b/smoketest/scripts/cli/test_service_monitoring_node-exporter.py @@ -0,0 +1,64 @@ +#!/usr/bin/env python3 +# +# Copyright (C) 2020-2024 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 unittest + +from base_vyostest_shim import VyOSUnitTestSHIM +from vyos.utils.process import process_named_running +from vyos.utils.file import read_file + +PROCESS_NAME = 'node_exporter' +base_path = ['service', 'monitoring', 'node-exporter'] +service_file = '/etc/systemd/system/node_exporter.service' +listen_if = 'dum3421' +listen_ip = '192.0.2.1' + + +class TestMonitoringNodeExporter(VyOSUnitTestSHIM.TestCase): + @classmethod + def setUpClass(cls): + # call base-classes classmethod + super(TestMonitoringNodeExporter, cls).setUpClass() + # create a test interfaces + cls.cli_set( + cls, ['interfaces', 'dummy', listen_if, 'address', listen_ip + '/32'] + ) + + @classmethod + def tearDownClass(cls): + cls.cli_delete(cls, ['interfaces', 'dummy', listen_if]) + super(TestMonitoringNodeExporter, cls).tearDownClass() + + def tearDown(self): + self.cli_delete(base_path) + self.cli_commit() + self.assertFalse(process_named_running(PROCESS_NAME)) + + def test_01_basic_config(self): + self.cli_set(base_path + ['listen-address', listen_ip]) + + # commit changes + self.cli_commit() + + file_content = read_file(service_file) + self.assertIn(f'{listen_ip}:9100', file_content) + + # Check for running process + self.assertTrue(process_named_running(PROCESS_NAME)) + + +if __name__ == '__main__': + unittest.main(verbosity=2) diff --git a/src/conf_mode/service_monitoring_node-exporter.py b/src/conf_mode/service_monitoring_node-exporter.py new file mode 100755 index 000000000..e8d7c15b4 --- /dev/null +++ b/src/conf_mode/service_monitoring_node-exporter.py @@ -0,0 +1,104 @@ +#!/usr/bin/env python3 +# +# Copyright (C) 2021-2024 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 vyos.config import Config +from vyos.configdict import is_node_changed +from vyos.configverify import verify_vrf +from vyos.template import render +from vyos.utils.process import call +from vyos import ConfigError +from vyos import airbag + + +airbag.enable() + +service_file = '/etc/systemd/system/node_exporter.service' +systemd_service = 'node_exporter.service' + + +def get_config(config=None): + if config: + conf = config + else: + conf = Config() + base = ['service', 'monitoring', 'node-exporter'] + if not conf.exists(base): + return None + + config_data = conf.get_config_dict( + base, key_mangling=('-', '_'), get_first_key=True + ) + config_data = conf.merge_defaults(config_data, recursive=True) + + tmp = is_node_changed(conf, base + ['vrf']) + if tmp: + config_data.update({'restart_required': {}}) + + return config_data + + +def verify(config_data): + # bail out early - looks like removal from running config + if not config_data: + return None + + verify_vrf(config_data) + return None + + +def generate(config_data): + if not config_data: + # Delete systemd files + if os.path.isfile(service_file): + os.unlink(service_file) + return None + + # Render node_exporter service_file + render(service_file, 'node_exporter/node_exporter.service.j2', config_data) + return None + + +def apply(config_data): + # Reload systemd manager configuration + call('systemctl daemon-reload') + if not config_data: + 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 config_data: + 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) |