Symfony 2 : Log into a specific file

You have to add the info to the services.yml file, not the config.yml file:

So in services.yml (or services.xml) you have

my_service.logger:    class:     Symfony\Bridge\Monolog\Logger    arguments: [app]    calls:        - [pushHandler, [@my_service.logger_handler]]my_service.logger_handler:    class:     Monolog\Handler\StreamHandler           arguments: [%kernel.logs_dir%/%kernel.environment%.admin.log, 200]

and in your controller action you use:

$logger = $this->get('my_service.logger');

The answer above worked perfectly fine for me. I had to adapt it though as my configuration was in xml and not yaml.

Here is the exact same configuration but using xml.

<service id="my_service.logger" class="Symfony\Bridge\Monolog\Logger">    <argument type="string">app</argument>    <call method="pushHandler">        <argument type="service" id="my_service.logger_handler" />    </call></service><service id="my_service.logger_handler" class="Monolog\Handler\StreamHandler">    <argument>type="string">%kernel.logs_dir%/%kernel.environment%.license.log</argument>    <argument type="string">200</argument></service>