How to setup greylog with wonolog?

[juslintek]

Hi, how to setup wonolog with greylog?

[Chrico]

Howdy.

Basically you just need to use the gelf-php-package.

Have a look at: https://inpsyde.com/en/log-management-with-graylog/?noredirect=en_US :)

[drzraf]

I'm currently setting up Wonolog with GrayLog but I need to pass a custom field (an auth token) to the Gelf JSON payload aka an additional

These could be passed as the 3rd array $context argument of a Gelf\Logger

By default Wonolog initializes a Monolog\Logger using one parameter.
What would be the way to initialize the default context of a GelfHandler?

[Chrico]

Good morning.

Internally we're using the Monolog\Logger. The linked Gelf\Logger is not used in Wonolog by default.

It is possible to use the Inpsyde\Wonolog\Channels::ACTION_LOGGER-hook, to replace the Logger, but it is currently not supported to use a Psr\Log\LoggerInterface here. Our code relies on Logger::getName() which is specific to Monolog.

When looking at the Gelf\Message::$additionals, i can see, that they are just added via $message['_'.$key] in Message::toArray().

What i would suggest is, that you bootstrap Wonolog with build in the GelfHandler and adding a processor to add the key:

<?php
use Monolog\Handler\GelfHandler;
use Monolog\Processor ProcessorInterface;

$publisher = Gelf\Publisher();

$handler = new GelfHandler($publisher);
$handler->pushProcessor(new class implements ProcessorInterface {

    public function __invoke(array $record) 
    {
        $record['_your-token'] = '....';

        return $record;
    }
});

Wonolog\bootstrap($handler);

[gmazzap]

Wonolog v1 does not allow to use custom Loggers, but only custom Handlers and/or Formatters.

Wonolog v2 will have that possibility. As for v1, the solution provided by @Chrico is one way to go.

Alternatively, you could extend the GelfMessageFormatter like:

class MyFormatter extends \Monolog\Formatter\GelfMessageFormatter
{
    private $token;

    public function __construct(
        string $token,
        ?string $systemName = null,
        ?string $extraPrefix = null,
        string $contextPrefix = 'ctxt_',
        ?int $maxLength = null
    ) {
        $this->token = $token;
        parent::__construct($systemName, $extraPrefix, $contextPrefix, $maxLength);
    }

    public function format(array $record): \Gelf\Message
    {
        $message = parent::format($record);

        return $message->setAdditional('token', $this->token);
    }
}

and then for Wonolog:

$handler = new GelfHandler(new Gelf\Publisher());
$handler->setFormatter(new MyFormatter('...token...'));
Wonolog\bootstrap($handler);