Planned lessonMID-047-L06

Correlating logs and traces

On This Lesson 4 topics

This lesson is planned. The outline below lists the topics it will cover. The full lesson has not been published yet.

In this lesson

find all logs for one request.

Put trace_id and span_id in every log line (MDC fields, JSON logs).
In the tracing tool jump from a span to its logs; in the log tool search by trace id.
Log structured JSON, not free text.
Never log secrets or personal data.

Draft outline details

a JSON log line: {"level":"WARN","trace_id":"4bf9…","msg":"stock low","sku":"A12"}.

Which id joins a log line to a trace?

Show answer

The trace id.

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