build(monitoring): implement open-telemetry support

composer.json

@@ -12,7 +12,14 @@
         "doctrine/doctrine-migrations-bundle": "^3.3",
         "doctrine/orm": "^3.2",
         "fakerphp/faker": "^1.23",
+        "grpc/grpc": "^1.57",
         "nubium/this-should-never-happen-exception": "^1.0",
+        "nyholm/psr7": "^1.8",
+        "open-telemetry/exporter-otlp": "^1.0",
+        "open-telemetry/opentelemetry-auto-symfony": "1.0.0beta27",
+        "open-telemetry/opentelemetry-logger-monolog": "^1.0",
+        "open-telemetry/sdk": "^1.0",
+        "open-telemetry/transport-grpc": "^1.0",
         "phpdocumentor/reflection-docblock": "^5.4",
         "phpstan/phpdoc-parser": "^1.29",
         "symfony/asset": "7.1.*",

config/packages/http_discovery.yaml

@@ -0,0 +1,10 @@
+services:
+    Psr\Http\Message\RequestFactoryInterface: '@http_discovery.psr17_factory'
+    Psr\Http\Message\ResponseFactoryInterface: '@http_discovery.psr17_factory'
+    Psr\Http\Message\ServerRequestFactoryInterface: '@http_discovery.psr17_factory'
+    Psr\Http\Message\StreamFactoryInterface: '@http_discovery.psr17_factory'
+    Psr\Http\Message\UploadedFileFactoryInterface: '@http_discovery.psr17_factory'
+    Psr\Http\Message\UriFactoryInterface: '@http_discovery.psr17_factory'
+
+    http_discovery.psr17_factory:
+        class: Http\Discovery\Psr17Factory

config/packages/monolog.yaml

@@ -4,7 +4,11 @@ monolog:
 
 when@dev:
     monolog:
+
         handlers:
+            otel:
+                type: service # I wouldn't use this in a real application in @dev environment
+                id: App\Bridge\Monolog\Handler\SymfonyOtelHandler
             main:
                 type: stream
                 path: "%kernel.logs_dir%/%kernel.environment%.log"

src/Bridge/Monolog/Handler/SymfonyOtelHandler.php

@@ -0,0 +1,35 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Bridge\Monolog\Handler;
+
+use Monolog\Handler\AbstractHandler;
+use Monolog\LogRecord;
+use OpenTelemetry\API\Globals;
+use OpenTelemetry\Contrib\Logs\Monolog\Handler;
+use Psr\Log\LogLevel;
+
+/**
+ * This handler will send logs to OpenTelemetry using the Monolog adapter.
+ */
+final class SymfonyOtelHandler extends AbstractHandler
+{
+    private readonly Handler $innerHandler;
+
+    public function __construct()
+    {
+        parent::__construct();
+
+        $this->innerHandler = new Handler(
+            Globals::loggerProvider(),
+            LogLevel::INFO, //or `Logger::INFO`, or `Level::Info` depending on monolog version
+            true,
+        );
+    }
+
+    public function handle(LogRecord $record): bool
+    {
+        return $this->innerHandler->handle($record);
+    }
+}

symfony.lock

@@ -26,6 +26,18 @@
             "migrations/.gitignore"
         ]
     },
+    "php-http/discovery": {
+        "version": "1.19",
+        "recipe": {
+            "repo": "github.com/symfony/recipes",
+            "branch": "main",
+            "version": "1.18",
+            "ref": "f45b5dd173a27873ab19f5e3180b2f661c21de02"
+        },
+        "files": [
+            "config/packages/http_discovery.yaml"
+        ]
+    },
     "phpstan/phpstan": {
         "version": "1.11",
         "recipe": {