Magento 2 Logging
custom log channels with Monolog
Good logs answer questions. Bad logs just create noise, full files and false confidence. In Magento 2, clean logging pays off not only for debugging but for operations, support and reliable root cause analysis.
Table of contents
- 1. Why Magento 2 logging is architecture, not just a debugging aid
- 2. Splitting custom log channels in Magento 2 sensibly
- 3. Monolog handlers, formatters and context
- 4. Example of a custom logger
- 5. Logging in production: signal instead of file clutter
- 6. What data actually helps in logs
- 7. Common logging mistakes
- 8. exception.log vs. system.log vs. a custom channel
- 9. Magento 2 support
- 10. Summary and FAQ
1. Why Magento 2 logging is architecture, not just a debugging aid
Magento 2 logging is taken seriously in many projects only once an error is already visible in production. Then extra `info()` or `error()` calls get