Symfony logging with Rollbar

The Symfony Rollbar bundle doesn't support Symfony 6. Attempting to use the built-in Monolog Rollbar handler in Symfony directly results in the following:

Uncaught Error: Class "RollbarNotifier" not found

Fortunately we can use the Monolog\Handler\RollbarHandler still if we define it as a custom service in services.yaml and pass in Rollbar\RollbarLogger and the required arguments.

Fire require the Rollbar package:

composer require rollbar/rollbar

Then in services.yaml add the following:

Rollbar\RollbarLogger:
  class: Rollbar\RollbarLogger
  arguments:
    - {
      access_token: '%env(ROLLBAR_ACCESS_TOKEN)%',
      environment: 'production'
    }

Monolog\Handler\RollbarHandler:
  class: Monolog\Handler\RollbarHandler
  arguments:
    $level: 200

Then in monolog.yaml in either packages/prod/monolog.yaml or under when@prod in packages/monolog.yaml add the following:

monolog:
  handlers:
    main:
      type: fingers_crossed
      action_level: warning
      handler: rollbar
      excluded_http_codes: [ 405, 404 ]
      buffer_size: 50
    rollbar:
      type: service
      id: Monolog\Handler\RollbarHandler
      channels: [ "!php" ]

Don't forget to add ROLLBAR_ACCESS_TOKEN= to your .env files.