PHP Elastic APM for Laravel & Lumen

Laravel package of the https://github.com/philkra/elastic-apm-php-agent library, automatically handling transactions and errors/exceptions. If using Illuminate\Support\Facades\Auth the user Id added to the context. Tested with Laravel 5.7.* and the philkra/elastic-apm-php-agent version 7.x.

Install

Add the following lines to the repositories array in your composer.json file.

{
    "type": "vcs",
    "url": "https://github.com/AanZee/elastic-apm-laravel"
},

After you've added these lines you can require the package with the following command:

composer require bethinkpl/elastic-apm-laravel

Additional features

• X-Requested-By HTTP request header value is set as labels.requested_by APM transaction field (end-user-ajax value is used when X-Requested-With: XMLHttpRequest is set)
• sampling of transactions reported to APM
• tracking of HTTP requests performed using GuzzleHttp library. Simply add the following middleware to your Guzzle client:

<?php

use PhilKra\ElasticApmLaravel\Providers\ElasticApmServiceProvider;
use GuzzleHttp\HandlerStack;

$handler = HandlerStack::create();
$handler->push(ElasticApmServiceProvider::getGuzzleMiddleware());

// create your client with 'handler' option passed

Middleware

Laravel

Register as (e.g.) global middleware to be called with every request. https://laravel.com/docs/5.6/middleware#global-middleware

Register the middleware in app/Http/Kernel.php

protected $middleware = [
    // ... more middleware
    \PhilKra\ElasticApmLaravel\Middleware\RecordTransaction::class,
];

Lumen

In bootstrap/app.php register PhilKra\ElasticApmLaravel\Middleware\RecordTransaction::class as middleware:

$app->middleware([
    PhilKra\ElasticApmLaravel\Middleware\RecordTransaction::class
]);

Service Provider

Laravel

No need to register service provider manually. It is registered automatically by package discovery.

Lumen

In bootstrap/app.php register \PhilKra\ElasticApmLaravel\Providers\ElasticApmServiceProvider::class as service provider:

$app->register(\PhilKra\ElasticApmLaravel\Providers\ElasticApmServiceProvider::class);

Spans

Laravel

A Transaction object is made available via the dependency container and can be used to start a new span at any point in the application. The Span will automatically add itself to the Transaction when it is ended.

// Use any normal Laravel method of resolving the dependency
$transaction = app(\PhilKra\ElasticApmLaravel\Apm\Transaction::class);

$span = $transaction->startNewSpan('My Span', 'app.component_name');

// do some stuff

$span->end();

Lumen

pending

Error/Exception Handling

Laravel

In app/Exceptions/Handler, add the following to the report method before the parent::report($exception) line:

// Stop the APM transaction to log everything correctly
$agent = app('elastic-apm');
$agent->captureThrowable($exception);

// Stop transaction can throw exceptions when the transaction is not found
// To avoid the error logging / reporting not working correctly we try/catch it
try {
    $transactionName = sprintf(
        "%s %s",
        request()->server->get('REQUEST_METHOD'),
        (!is_null(Route::current()) ? Route::current()->uri : ((request()->getPathInfo() == '') ? '/' : request()->getPathInfo()))
    );

    $agent->stopTransaction($transactionName);
} catch (Exception $e) {
    // Just continue but log the error
    Log::error($e);
}

Make sure to import the Log facade at the top of your file. Everything else should work out of the box.

use Log;

Lumen

not tested yet.

Agent Configuration

Laravel

The following environment variables are supported in the default configuration:

Variable	Description
APM_ACTIVE	true or false defaults to true. If false, the agent will collect, but not send, transaction data.
APM_APPNAME	Name of the app as it will appear in APM.
APM_APPVERSION	Version of the app as it will appear in APM.
APM_SERVERURL	URL to the APM intake service.
APM_SECRETTOKEN	Secret token, if required.
APM_APIVERSION	APM API version, defaults to v1 (only v1 is supported at this time).
APM_USEROUTEURI	true or false defaults to false. The default behavior is to record the URL as sent in the request. This can result in excessive unique entries in APM. Set to true to have the agent use the route URL instead.
APM_NORMALIZEURI	true or false defaults to false. If enabled, removes variable parts from URI when generating transaction name (e.g. GET /foo/bar/123 is reported as GET /foo/bar/N). APM_USEROUTEURI needs to be enabled.
APM_QUERYLOG	true or false defaults to 'true'. Set to false to completely disable query logging, or to auto if you would like to use the threshold feature.
APM_THRESHOLD	Query threshold in milliseconds, defaults to 200. If a query takes longer then 200ms, we enable the query log. Make sure you set APM_QUERYLOG=auto.
APM_BACKTRACEDEPTH	Defaults to 25. Depth of backtrace in query span.
APM_RENDERSOURCE	Defaults to true. Include source code in query span.
APM_HTTPLOG	Defaults to true. Will record HTTP requests performed via GuzzleHttp.
APM_SAMPLING	Defaults to 100. Sets the percentage of transactions that will be reported to APM (ranges from 0 to 100).

You may also publish the elastic-apm.php configuration file to change additional settings:

php artisan vendor:publish --tag=config

Once published, open the config/elastic-apm.php file and review the various settings.

Laravel Test Setup

Laravel provides classes to support running unit and feature tests with PHPUnit. In most cases, you will want to explicitly disable APM during testing since it is enabled by default. Refer to the Laravel documentation for more information (https://laravel.com/docs/5.7/testing).

Because the APM agent checks it's active status using a strict boolean type, you must ensure your APM_ACTIVE value is a boolean false rather than simply a falsy value. The best way to accomplish this is to create an .env.testing file and include APM_ACTIVE=false, along with any other environment settings required for your tests. This file should be safe to include in your SCM.