mirror of
https://github.com/librenms/librenms.git
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129 lines
4.4 KiB
PHP
129 lines
4.4 KiB
PHP
<?php
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/**
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* DistributedPoller.php
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*
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* -Description-
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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* @link https://www.librenms.org
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*
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* @copyright 2017 Tony Murray
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* @author Tony Murray <murraytony@gmail.com>
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*/
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/**
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* Created by IntelliJ IDEA.
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* User: murrant
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* Date: 10/8/17
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* Time: 2:16 AM
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*/
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namespace LibreNMS\Validations;
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use App\Models\PollerCluster;
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use Carbon\Carbon;
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use LibreNMS\Config;
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use LibreNMS\Validator;
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class DistributedPoller extends BaseValidation
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{
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public function isDefault()
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{
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// run by default if distributed polling is enabled
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return Config::get('distributed_poller');
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}
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/**
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* Validate this module.
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* To return ValidationResults, call ok, warn, fail, or result methods on the $validator
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*
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* @param Validator $validator
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*/
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public function validate(Validator $validator)
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{
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if (! Config::get('distributed_poller')) {
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$validator->fail('You have not enabled distributed_poller', 'lnms config:set distributed_poller true');
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return;
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}
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if (! Config::get('rrdcached')) {
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$validator->fail('You have not configured $config[\'rrdcached\']');
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} elseif (! is_dir(Config::get('rrd_dir'))) {
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$validator->fail('You have not configured $config[\'rrd_dir\']');
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} else {
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Rrd::checkRrdcached($validator);
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}
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if (PollerCluster::exists()) {
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if (PollerCluster::isActive()->exists()) {
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$validator->info('Detected Dispatcher Service');
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$this->checkDispatcherService($validator);
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return;
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}
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$validator->warn('Dispatcher Service has been used in your cluster, but not recently. It may take up to 5 minutes to register.');
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}
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$validator->info('Detected Python Wrapper');
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$this->checkPythonWrapper($validator);
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}
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private function checkDispatcherService(Validator $validator)
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{
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$driver = config('cache.default');
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if ($driver != 'redis') {
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$validator->warn("Using $driver for distributed locking, you should set CACHE_DRIVER=redis");
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}
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try {
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$lock = \Cache::lock('dist_test_validation');
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$lock->get();
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$lock->release();
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} catch (\Exception $e) {
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$validator->fail('Locking server issue: ' . $e->getMessage());
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}
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$node = PollerCluster::firstWhere('node_id', config('librenms.node_id'));
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if (! $node->exists) {
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$validator->fail('Dispatcher service is enabled on your cluster, but not in use on this node');
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return;
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}
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if ($node->last_report->lessThan(Carbon::now()->subSeconds($node->getSettingValue('poller_frequency')))) {
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$validator->fail('Dispatcher service has not reported stats within the last poller window');
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}
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}
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private function checkPythonWrapper(Validator $validator)
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{
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if (! Config::get('distributed_poller_memcached_host')) {
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$validator->fail('You have not configured $config[\'distributed_poller_memcached_host\']');
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} elseif (! Config::get('distributed_poller_memcached_port')) {
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$validator->fail('You have not configured $config[\'distributed_poller_memcached_port\']');
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} else {
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$connection = @fsockopen(Config::get('distributed_poller_memcached_host'), Config::get('distributed_poller_memcached_port'));
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if (! is_resource($connection)) {
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$validator->fail('We could not get memcached stats, it is possible that we cannot connect to your memcached server, please check');
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} else {
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fclose($connection);
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$validator->ok('Connection to memcached is ok');
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}
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}
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}
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}
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