Integrating OpenCensus with Symfony

Symfony 3.3

1. To add OpenCensus to our Symfony application, we will create a Bundle In src/AppBundle/OpenCensusBundle.php:

   <?php
   namespace AppBundle;
   
   use OpenCensus\Trace\Exporter\StackdriverExporter;
   use OpenCensus\Trace\Integrations\Mysql;
   use OpenCensus\Trace\Integrations\PDO;
   use OpenCensus\Trace\Integrations\Symfony;
   use OpenCensus\Trace\Tracer;
   use Symfony\Component\HttpKernel\Bundle\Bundle;
   
   class AppBundle extends Bundle
   {
       public function boot()
       {
           $this->setupOpenCensus();
       }
   
       private function setupOpenCensus()
       {
           if (php_sapi_name() == 'cli') {
               return;
           }
   
           // Enable OpenCensus extension integrations
           Mysql::load();
           PDO::load();
           Symfony::load();
   
           // Start the request tracing for this request
           $exporter = new StackdriverExporter();
           Tracer::start($exporter);
       }
   }

   In this example, we configured StackdriverExporter, but you can configure any exporter here. You can also enable any other integrations here.

2. Enable this Bundle by adding it to the list of bundles registered. In app/AppKernel.php:

   <?php
   // in the `registerBundles()`
   ...
   $bundles = [
       ...
       new AppBundle\AppBundle(),
       new AppBundle\OpenCensusBundle(),
   ];
   ...