How was logging implemented and organized in your previous project or company?

In my previous project, logging was organized using a centralized system based on the ELK stack (Elasticsearch, Logstash, Kibana). Applications wrote logs in JSON format, which were collected by Logstash and sent to Elasticsearch for indexing and storage.

A standard logging library was used for applications, with configuration for levels (DEBUG, INFO, WARN, ERROR) and file rotation. Important events and errors were logged with tags and additional metadata for easier searching.

This approach allowed for quick problem detection and analysis, building dashboards, and alerts based on logs.