Tysiące error messages dziennie. Jak znaleźć relevant? Structured logging.
Structured logging
Zamiast „Error occurred” → log JSON: {„timestamp”:”2026-06-05T09:30:00″,”level”:”error”,”user_id”:123,”action”:”payment”,”error”:”card declined”}. Searchable, parseable, analyzable.
ELK Stack
Elasticsearch, Logstash, Kibana. Logs → Logstash → Elasticsearch → Kibana dashboard. Search, filter, visualize easily.
Log levels
DEBUG, INFO, WARNING, ERROR, CRITICAL. Use appropriately. Don’t log everything as ERROR.
Retention
Logs take storage. Keep recent (30 days), archive older (1 year). Balance accessibility i cost.