custom-prometheus-exporter/index.php

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<?php
require 'vendor/autoload.php';
require 'config.php';
if($_SERVER["REQUEST_URI"] == '/metrics' || php_sapi_name() == 'cli') {
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foreach ($config as $key => &$c) {
if(isset($c['command'])) {
$output=null;
$retval=null;
exec($c['command'], $output, $retval);
$output = implode("\n", $output);
} elseif(isset($c['http'])) {
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$client = new GuzzleHttp\Client();
$options = [];
$output = NULL;
if (isset($c['http']['proxy'])) {
$options['proxy'] = $c['http']['proxy'];
}
if (isset($c['http']['data']) && $c['http']['data'] == 'responsetime') {
$options['on_stats'] = function (GuzzleHttp\TransferStats $stats) use (&$output) {
$output = $stats->getTransferTime();
};
}
$res = $client->request('GET', $c['http']['url'], $options);
if (isset($c['http']['data']) && $c['http']['data'] == 'responsebody') {
$output = $res->getBody()->getContents();
}
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}
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if(isset($c['jsonelem'])) {
$c['value'] = getArrayValue($c['jsonelem'], json_decode($output, true));
} else {
$c['value'] = $output;
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}
}
$loader = new \Twig\Loader\FilesystemLoader('templates');
$twig = new \Twig\Environment($loader, [
'cache' => 'twig_cache',
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]);
echo $twig->render('metrics.twig', ['config' => $config]);
}
function getArrayValue($elem, $array) {
$elem = explode('.', $elem);
$new_array = $array;
foreach ($elem as $i) {
$new_array = $new_array[$i];
}
return $new_array;
}