monolog: channels: [deprecation] when@dev: monolog: handlers: main: type: stream path: "%kernel.logs_dir%/%kernel.environment%.log" level: debug channels: ["!event"] console: type: console process_psr_3_messages: false channels: ["!event", "!doctrine", "!console"] when@prod: monolog: handlers: main: type: stream path: "%kernel.logs_dir%/%kernel.environment%.log" level: info channels: ["!deprecation"] deprecation: type: stream channels: [deprecation] path: "%kernel.logs_dir%/deprecations.log"