Added Dockerfile for PHP with Apache

This commit introduces a new Dockerfile that sets up a PHP 8.3 environment with Apache. It includes the following significant changes:
- Sets the working directory to /var/www/html
- Copies current directory contents into the container
- Installs Composer and activates mod_rewrite
- Installs Process Control extension using curl command
- Runs composer install to fetch dependencies
- Exposes port 9050 and modifies Apache configuration to listen on this port
- Adds environment variables to Apache configuration 
- Changes ownership of /var/www/html to www-data user 
- Starts the Apache server using apache2-foreground command

.htaccess

@@ -0,0 +1,4 @@
+RewriteEngine on
+RewriteCond %{REQUEST_FILENAME} !-f
+RewriteCond %{REQUEST_FILENAME} !-d
+RewriteRule ^.*$ /index.php [L,QSA]

dockerfile

@@ -0,0 +1,42 @@
+# Gebruik een officiële PHP-image met Apache
+FROM php:8.3-apache
+
+# Stel de werkdirectory in
+WORKDIR /var/www/html
+
+# Kopieer de huidige directory inhoud naar /var/www/html in de container
+COPY . /var/www/html
+
+# Installeer Composer
+COPY --from=composer:latest /usr/bin/composer /usr/bin/composer
+
+# Activeer mod_rewrite
+RUN a2enmod rewrite
+
+# Installeer de Process Control extension
+RUN curl -sSL https://github.com/mlocati/docker-php-extension-installer/releases/latest/download/install-php-extensions -o - | sh -s pcntl zip
+
+# Voer composer install uit om de afhankelijkheden te installeren
+RUN composer install
+
+# Stel de poort in die de container zal exposeren
+EXPOSE 9050
+
+# Wijzig de Apache configuratie om op poort 9050 te luisteren
+RUN sed -i 's/Listen 80/Listen 9050/' /etc/apache2/ports.conf
+RUN sed -i 's/<VirtualHost *:80>/<VirtualHost *:9050>/' /etc/apache2/sites-available/000-default.conf
+
+# Voeg environment variables toe aan de Apache configuratie
+ENV PHP_BINARY=/usr/local/bin/php
+ENV CONFIG_FILE=/var/www/html/config.php
+
+# Activeer mod_rewrite
+RUN a2enmod rewrite
+
+# Start de Apache server
+RUN mkdir -p /var/www/html/twig_cache
+RUN chown -R www-data:www-data /var/www/html
+USER www-data
+
+# Start de Apache server
+CMD ["apache2-foreground"]

index.php

@@ -1,139 +1,6 @@
 <?php
-require 'vendor/autoload.php';
-$configFile = getenv('CONFIG_FILE') ?: 'config.php';
-$cacheFile = $configFile . '.cache.json';
-
-if (file_exists($configFile)) {
-    require ($configFile);
-} else {
-    echo ("Configuration file not found: " . $configFile);
-    exit(1);
-}
-if(file_exists($cacheFile)) {
-    $oldconfig = json_decode(file_get_contents($cacheFile), true);
-} else {
-    $oldconfig = [];
-}
-
-if(php_sapi_name() == 'cli' || $_SERVER["REQUEST_URI"] == '/metrics') {
 header('Content-Type: text/plain; version=0.0.4');
-    foreach ($config as $key => &$metric) {
+$config = getenv('CONFIG_FILE'); 
-        if (!isset($metric['submetrics'])) {
+$phpbin = getenv('PHP_BINARY');
-            $metric['submetrics'] = [$metric];
+$output = shell_exec('CONFIG_FILE="' . $config . '" ' . $phpbin . ' script.php');
-        }
+echo $output;
-        foreach ($metric['submetrics'] as $subkey => &$submetric) {
-            $pid = pcntl_fork();
-            if ($pid > 0) {
-                $pids[] = $pid;
-            } else {
-                if (isset($submetric['command'])) {
-                    $output = null;
-                    $retval = null;
-                    try {
-                        exec($submetric['command'], $output, $retval);
-                        $output = implode("\n", $output);
-                    } catch (Exception $e) {
-                        $output = '';
-                    }
-                } elseif (isset($submetric['http'])) {
-                    $client = new GuzzleHttp\Client();
-
-                    $options = [];
-                    $output = NULL;
-                    if (isset($submetric['http']['proxy'])) {
-                        $options['proxy'] = $submetric['http']['proxy'];
-                    }
-                    if (isset($submetric['http']['data']) && $submetric['http']['data'] == 'responsetime') {
-                        $options['on_stats'] = function (GuzzleHttp\TransferStats $stats) use (&$output) {
-                            $output = $stats->getTransferTime();
-                        };
-                    }
-
-                    $hasresponse = NULL;
-                    try {
-                        $res = $client->request('GET', $submetric['http']['url'], $options);
-                        $hasresponse = true;
-                    } catch (GuzzleHttp\Exception\GuzzleException $e) {
-                        if (method_exists($e, 'getResponse')) {
-                            $res = $e->getResponse();
-                            $hasresponse = true;
-                        } else {
-                            $hasresponse = false;
-                        }
-                    }
-
-                    if (isset($submetric['http']['data']) && $submetric['http']['data'] == 'responsebody') {
-                        if ($hasresponse) {
-                            $output = $res->getBody()->getContents();
-                        } else {
-                            $output = '';
-                        }
-                    } elseif ((isset($submetric['http']['statuscode'])) && (isset($submetric['http']['data']) && $submetric['http']['data'] == 'hasresponse')) {
-                        if ($hasresponse) {
-                            $output = $output = (int)in_array($res->getStatusCode(), $submetric['http']['statuscode']);;
-                        } else {
-                            $output = 0;
-                        }
-                    } elseif (isset($submetric['http']['data']) && $submetric['http']['data'] == 'hasresponse') {
-                        $output = (int)$hasresponse;
-                    }
-                }
-
-                if (isset($submetric['jsonelem'])) {
-                    $submetric['value'] = getArrayValue($submetric['jsonelem'], json_decode($output, true));
-                } else {
-                    $submetric['value'] = $output;
-                }
-
-                if (is_bool($submetric['value'])) $submetric['value'] = $submetric['value'] ? 1 : 0;
-
-                file_put_contents('/tmp/.metrics.' . $key . '.' . $subkey, $submetric['value']);
-                exit();
-            }
-        }
-    }
-    foreach ($pids as $pid) {
-        pcntl_waitpid($pid, $none);
-    }
-
-
-    foreach ($config as $key => &$metric) {
-        foreach ($metric['submetrics'] as $subkey => &$submetric) {
-            $submetric['value'] = file_get_contents('/tmp/.metrics.' . $key . '.' . $subkey);
-            if (!empty($oldconfig) && !isset($submetric['value']) && (isset($submetric['fallback']) && !empty($submetric['fallback']))) {
-                if (!isset($submetric['fallback']['maxage']) || time() < ($oldconfig[$key]['submetrics'][$subkey]['time'] + $submetric['fallback']['maxage'])) {
-                    if ($submetric['fallback']['type'] == 'previous') {
-                        $submetric['value'] = $oldconfig[$key]['submetrics'][$subkey]['value'];
-                    } elseif ($submetric['fallback']['type'] == 'static') {
-                        $submetric['value'] = $submetric['fallback']['value'];
-                    }
-                    $submetric['time'] = $oldconfig[$key]['submetrics'][$subkey]['time'];
-                } else {
-                    $submetric['value'] = '';
-                    $submetric['time'] = 0;
-                }
-            } else {
-                $submetric['time'] = time();
-            }
-            unlink('/tmp/.metrics.' . $key . '.' . $subkey);
-        }
-    }
-
-    file_put_contents($cacheFile, json_encode($config, JSON_PRETTY_PRINT));
-
-    $loader = new \Twig\Loader\FilesystemLoader('templates');
-    $twig = new \Twig\Environment($loader, [
-        'cache' => 'twig_cache',
-    ]);
-    echo $twig->render('metrics.twig', ['config' => $config]);
-}
-
-function getArrayValue($elem, $array) {
-    $elem = explode('.', $elem);
-    $new_array = $array;
-    foreach ($elem as $i) {
-        if(empty($new_array)) break;
-        $new_array = $new_array[$i];
-    }
-    return $new_array;
-}

script.php

@@ -0,0 +1,138 @@
+<?php
+require 'vendor/autoload.php';
+$configFile = getenv('CONFIG_FILE') ?: 'config.php';
+$cacheFile = 'twig_cache/' . hash('murmur3f', $configFile);
+
+if (file_exists($configFile)) {
+    require ($configFile);
+} else {
+    echo ("Configuration file not found: " . $configFile);
+    exit(1);
+}
+if(file_exists($cacheFile)) {
+    $oldconfig = json_decode(file_get_contents($cacheFile), true);
+} else {
+    $oldconfig = [];
+}
+
+if(php_sapi_name() == 'cli' || $_SERVER["REQUEST_URI"] == '/metrics') {
+    foreach ($config as $key => &$metric) {
+        if (!isset($metric['submetrics'])) {
+            $metric['submetrics'] = [$metric];
+        }
+        foreach ($metric['submetrics'] as $subkey => &$submetric) {
+            $pid = pcntl_fork();
+            if ($pid > 0) {
+                $pids[] = $pid;
+            } else {
+                if (isset($submetric['command'])) {
+                    $output = null;
+                    $retval = null;
+                    try {
+                        exec($submetric['command'], $output, $retval);
+                        $output = implode("\n", $output);
+                    } catch (Exception $e) {
+                        $output = '';
+                    }
+                } elseif (isset($submetric['http'])) {
+                    $client = new GuzzleHttp\Client();
+
+                    $options = [];
+                    $output = NULL;
+                    if (isset($submetric['http']['proxy'])) {
+                        $options['proxy'] = $submetric['http']['proxy'];
+                    }
+                    if (isset($submetric['http']['data']) && $submetric['http']['data'] == 'responsetime') {
+                        $options['on_stats'] = function (GuzzleHttp\TransferStats $stats) use (&$output) {
+                            $output = $stats->getTransferTime();
+                        };
+                    }
+
+                    $hasresponse = NULL;
+                    try {
+                        $res = $client->request('GET', $submetric['http']['url'], $options);
+                        $hasresponse = true;
+                    } catch (GuzzleHttp\Exception\GuzzleException $e) {
+                        if (method_exists($e, 'getResponse')) {
+                            $res = $e->getResponse();
+                            $hasresponse = true;
+                        } else {
+                            $hasresponse = false;
+                        }
+                    }
+
+                    if (isset($submetric['http']['data']) && $submetric['http']['data'] == 'responsebody') {
+                        if ($hasresponse) {
+                            $output = $res->getBody()->getContents();
+                        } else {
+                            $output = '';
+                        }
+                    } elseif ((isset($submetric['http']['statuscode'])) && (isset($submetric['http']['data']) && $submetric['http']['data'] == 'hasresponse')) {
+                        if ($hasresponse) {
+                            $output = $output = (int)in_array($res->getStatusCode(), $submetric['http']['statuscode']);;
+                        } else {
+                            $output = 0;
+                        }
+                    } elseif (isset($submetric['http']['data']) && $submetric['http']['data'] == 'hasresponse') {
+                        $output = (int)$hasresponse;
+                    }
+                }
+
+                if (isset($submetric['jsonelem'])) {
+                    $submetric['value'] = getArrayValue($submetric['jsonelem'], json_decode($output, true));
+                } else {
+                    $submetric['value'] = $output;
+                }
+
+                if (is_bool($submetric['value'])) $submetric['value'] = $submetric['value'] ? 1 : 0;
+
+                file_put_contents('/tmp/.metrics.' . $key . '.' . $subkey, $submetric['value']);
+                exit();
+            }
+        }
+    }
+    foreach ($pids as $pid) {
+        pcntl_waitpid($pid, $none);
+    }
+
+
+    foreach ($config as $key => &$metric) {
+        foreach ($metric['submetrics'] as $subkey => &$submetric) {
+            $submetric['value'] = file_get_contents('/tmp/.metrics.' . $key . '.' . $subkey);
+            if (!empty($oldconfig) && !isset($submetric['value']) && (isset($submetric['fallback']) && !empty($submetric['fallback']))) {
+                if (!isset($submetric['fallback']['maxage']) || time() < ($oldconfig[$key]['submetrics'][$subkey]['time'] + $submetric['fallback']['maxage'])) {
+                    if ($submetric['fallback']['type'] == 'previous') {
+                        $submetric['value'] = $oldconfig[$key]['submetrics'][$subkey]['value'];
+                    } elseif ($submetric['fallback']['type'] == 'static') {
+                        $submetric['value'] = $submetric['fallback']['value'];
+                    }
+                    $submetric['time'] = $oldconfig[$key]['submetrics'][$subkey]['time'];
+                } else {
+                    $submetric['value'] = '';
+                    $submetric['time'] = 0;
+                }
+            } else {
+                $submetric['time'] = time();
+            }
+            unlink('/tmp/.metrics.' . $key . '.' . $subkey);
+        }
+    }
+
+    file_put_contents($cacheFile, json_encode($config, JSON_PRETTY_PRINT));
+
+    $loader = new \Twig\Loader\FilesystemLoader('templates');
+    $twig = new \Twig\Environment($loader, [
+        'cache' => 'twig-cache',
+    ]);
+    echo $twig->render('metrics.twig', ['config' => $config]);
+}
+
+function getArrayValue($elem, $array) {
+    $elem = explode('.', $elem);
+    $new_array = $array;
+    foreach ($elem as $i) {
+        if(empty($new_array)) break;
+        $new_array = $new_array[$i];
+    }
+    return $new_array;
+}

templates/metrics.twig

@@ -3,6 +3,7 @@
 # HELP {{ key }} {{ metric.help }}
 {% endif %}
 # TYPE {{ key }} {% if metric.type is defined and metric.type is not empty %}{{ metric.help }}{% else %}gauge{% endif %}
+
 {% for subkey, submetric in metric.submetrics %}
 {{ key }}{% if submetric.labels is defined and submetric.labels is not empty %}{{ '{' }}{% for label, value in submetric.labels %}{{ label }}="{{ value }}"{% if not loop.last %},{% endif %}{% endfor %}{{ '}' }}{% endif %} {{ submetric.value }}
 {% endfor %}