274 lines
9.2 KiB
PHP
274 lines
9.2 KiB
PHP
<?php
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/**
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* PHP Server Monitor
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* Monitor your servers and websites.
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*
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* This file is part of PHP Server Monitor.
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* PHP Server Monitor 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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* PHP Server Monitor 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 PHP Server Monitor. If not, see <http://www.gnu.org/licenses/>.
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*
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* @package phpservermon
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* @author Jérôme Cabanis <http://lauraly.com>
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* @author Pepijn Over <pep@mailbox.org>
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* @copyright Copyright (c) 2008-2017 Pepijn Over <pep@mailbox.org>
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* @license http://www.gnu.org/licenses/gpl.txt GNU GPL v3
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* @version Release: @package_version@
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* @link http://www.phpservermonitor.org/
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**/
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namespace psm\Util\Server;
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use psm\Service\Database;
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/**
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* History util, create HTML for server graphs
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*/
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class HistoryGraph {
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/**
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* Database service
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* @var \psm\Service\Database $db;
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*/
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protected $db;
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/**
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* Twig environment
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* @var \Twig_Environment $twig
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*/
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protected $twig;
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function __construct(Database $db, \Twig_Environment $twig) {
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$this->db = $db;
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$this->twig = $twig;
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}
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/**
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* Prepare the HTML for the graph
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* @return string
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*/
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public function createHTML($server_id) {
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// Archive all records for this server to make sure we have up-to-date stats
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$archive = new ArchiveManager($this->db);
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$archive->archive($server_id);
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$now = new \DateTime();
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$last_week = new \DateTime('-1 week 0:0:0');
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$last_year = new \DateTime('-1 year -1 week 0:0:0');
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$graphs = array(
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0 => $this->generateGraphUptime($server_id, $last_week, $now),
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1 => $this->generateGraphHistory($server_id, $last_year, $last_week),
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);
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$info_fields = array(
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'latency_avg' => '%01.4f',
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'uptime' => '%01.3f%%',
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);
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foreach($graphs as $i => &$graph) {
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// add subarray for info fields
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$graph['info'] = array();
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foreach($info_fields as $field => $format) {
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if(!isset($graph[$field])) {
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continue;
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}
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$graph['info'][] = array(
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'label' => psm_get_lang('servers', $field),
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'value' => sprintf($format, $graph[$field]),
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);
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}
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}
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$tpl_data = array(
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'graphs' => $graphs,
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'label_server' => psm_get_lang('servers', 'server'),
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'day_format' => psm_get_lang('servers', 'chart_day_format'),
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'long_date_format' => psm_get_lang('servers', 'chart_long_date_format'),
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'short_date_format' => psm_get_lang('servers', 'chart_short_date_format'),
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'short_time_format' => psm_get_lang('servers', 'chart_short_time_format'),
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);
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return $this->twig->render('module/server/history.tpl.html', $tpl_data);
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}
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/**
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* Generate data for uptime graph
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* @param int $server_id
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* @param \DateTime $start_time Lowest DateTime of the graph
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* @param \DateTime $end_time Highest DateTime of the graph
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* @return array
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*/
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public function generateGraphUptime($server_id, $start_time, $end_time) {
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$lines = array(
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'latency' => array(),
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);
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$cb_if_up = function($uptime_record) {
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return ($uptime_record['status'] == 1);
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};
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$records = $this->getRecords('uptime', $server_id, $start_time, $end_time);
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$data = $this->generateGraphLines($records, $lines, $cb_if_up, 'latency', $start_time, $end_time, true);
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$data['title'] = psm_get_lang('servers', 'chart_last_week');
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$data['plotmode'] = 'hour';
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$data['buttons'] = array();
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$data['buttons'][] = array('mode' => 'hour', 'label' => psm_get_lang('servers', 'hour'), 'class_active' => 'btn-info');
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$data['buttons'][] = array('mode' => 'day', 'label' => psm_get_lang('servers', 'day'));
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$data['buttons'][] = array('mode' => 'week', 'label' => psm_get_lang('servers', 'week'));
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// make sure to add chart id after buttons so its added to those tmeplates as well
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$data['chart_id'] = $server_id . '_uptime';
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return $data;
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}
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/**
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* Generate data for history graph
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* @param int $server_id
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* @param \DateTime $start_time Lowest DateTime of the graph
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* @param \DateTime $end_time Highest DateTime of the graph
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* @return array
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*/
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public function generateGraphHistory($server_id, $start_time, $end_time) {
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$lines = array(
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'latency_avg' => array(),
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'latency_max' => array(),
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'latency_min' => array(),
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);
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$server = $this->db->selectRow(PSM_DB_PREFIX.'servers', array('server_id' => $server_id), array('warning_threshold'));
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$cb_if_up = function($uptime_record) use($server) {
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return ($uptime_record['checks_failed'] < $server['warning_threshold']);
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};
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$records = $this->getRecords('history', $server_id, $start_time, $end_time);
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// dont add uptime for now because we have no way to calculate accurate uptimes for archived records
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$data = $this->generateGraphLines($records, $lines, $cb_if_up, 'latency_avg', $start_time, $end_time, false);
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$data['title'] = psm_get_lang('servers', 'chart_history');
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$data['plotmode'] = 'month';
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$data['buttons'] = array();
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$data['buttons'][] = array('mode' => 'week2', 'label' => psm_get_lang('servers', 'week'));
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$data['buttons'][] = array('mode' => 'month', 'label' => psm_get_lang('servers', 'month'), 'class_active' => 'btn-info');
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$data['buttons'][] = array('mode' => 'year', 'label' => psm_get_lang('servers', 'year'));
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// make sure to add chart id after buttons so its added to those tmeplates as well
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$data['chart_id'] = $server_id . '_history';
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return $data;
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}
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/**
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* Get all uptime/history records for a server
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* @param string $type
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* @param int $server_id
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* @param \DateTime $start_time Lowest DateTime of the graph
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* @param \DateTime $end_time Highest DateTime of the graph
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* @return array
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*/
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protected function getRecords($type, $server_id, $start_time, $end_time) {
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if(!in_array($type, array('history', 'uptime'))) {
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return array();
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}
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$records = $this->db->execute(
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'SELECT *
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FROM `' . PSM_DB_PREFIX . "servers_$type`
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WHERE `server_id` = :server_id AND `date` BETWEEN :start_time AND :end_time ORDER BY `date` ASC",
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array(
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'server_id' => $server_id,
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'start_time' => $start_time->format('Y-m-d H:i:s'),
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'end_time' => $end_time->format('Y-m-d H:i:s'),
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));
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return $records;
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}
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/**
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* Generate data arrays for graphs
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* @param array $records all uptime records to parse, MUST BE SORTED BY DATE IN ASCENDING ORDER
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* @param array $lines array with keys as line ids to prepare (key must be available in uptime records)
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* @param callable $cb_if_up function to check if the server is up or down
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* @param string $latency_avg_key which key from uptime records to use for calculating averages
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* @param \DateTime $start_time Lowest DateTime of the graph
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* @param \DateTime $end_time Highest DateTime of the graph
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* @param boolean $add_uptime add uptime calculation?
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* @return array
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*/
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protected function generateGraphLines($records, $lines, $cb_if_up, $latency_avg_key, $start_time, $end_time, $add_uptime = false) {
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$data = array();
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// PLEASE NOTE: all times are in microseconds! because of javascript.
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$last_date = 0;
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$latency_avg = 0;
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$series = array();
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// number of microseconds of downtime
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$time_down = 0;
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$down = array();
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// Create the list of points and server down zones
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foreach ($records as $uptime) {
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$time = strtotime($uptime['date']) * 1000;
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// use the first line to calculate average latency
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$latency_avg += (float) $uptime[$latency_avg_key];
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if($cb_if_up($uptime)) {
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// The server is up
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foreach($lines as $key => $value) {
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// add the value for each of the different lines
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if(isset($uptime[$key])) {
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$lines[$key][] = '[' . $time . ',' . round((float) $uptime[$key], 4) . ']';
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}
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}
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if($last_date) {
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// Was down before.
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// Record the first and last date as a string in the down array
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$down[] = '[' . $last_date . ',' . $time . ']';
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// add the number of microseconds of downtime to counter for %
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$time_down += ($time - $last_date);
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$last_date = 0;
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}
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} else {
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// The server is down
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if(!$last_date) {
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$last_date = $time;
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}
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}
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}
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$lines_merged = array();
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foreach($lines as $line_key => $line_value) {
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if(empty($line_value)) {
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continue;
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}
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$lines_merged[] = '[' . implode(',', $line_value) . ']';
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$series[] = "{label: '".psm_get_lang('servers', $line_key)."'}";
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}
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if($last_date) {
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// if last_date is still set, the last check was "down" and we are still in down mode
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$down[] = '[' . $last_date . ',0]';
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$time_down += (($end_time->getTimestamp() * 1000) - $last_date);
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}
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if($add_uptime) {
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$data['uptime'] = 100 - (($time_down / ($end_time->getTimestamp() - $start_time->getTimestamp())) / 10);
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}
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$data['latency_avg'] = count($records) > 0 ? ($latency_avg / count($records)) : 0;
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$data['server_lines'] = sizeof($lines_merged) ? '[' . implode(',', $lines_merged) . ']' : '';
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$data['server_down'] = sizeof($down) ? '[' . implode(',', $down) . ']' : '';
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$data['series'] = sizeof($series) ? '[' . implode(',', $series) . ']' : '';
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$data['end_timestamp'] = $end_time->getTimestamp() * 1000;
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return $data;
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}
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}
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