Trace-to-log correlation

Traces and logs describe the same application from different perspectives: traces show the request's path through services and operations, whereas logs capture events and messages in each component. In Monium, logs and traces are linked: from a log, you can navigate to a trace or span, and from a trace or span to related logs. This gives you the full context of the request from the same place to help you diagnose the problem faster.

Most OpenTelemetry instrumentation libraries automatically add trace IDs to log entries:

• trace_id: Trace ID.
• span_id: Span ID.

Here is an example of a log entry in JSON format with tracing context:

{
  "level": "INFO",
  "time": "2026-02-18T13:58:22.200Z",
  "project": "folder__b1g86q4m5vej********",
  "cluster": "default",
  "service": "frontend-proxy",
  "host": "frontend-proxy-f55dc9f55-ktxwv",
  "message": "Request successfuly served",
  "span_id": "a4df8085ed748a6b",
  "trace_id": "7d069c8223d982cd72e549860de9d210",
  "labels": {
    "k8s.deployment.name": "frontend-proxy",
    "k8s.namespace.name": "default",
    "k8s.node.name": "cl1c63baqn6458a167ec-omor"
  }
}

Field names in logs may vary depending on the delivery format, e.g., trace.id and span.id instead of trace_id and span_id. To navigate to a trace, use the ID value.

Searching for traces by logsSearching for traces by logs

To open a trace or span by log and view the full request execution context:

1. Open the logs page and locate the entry you need. For more information on viewing logs, see Viewing logs.
2. In the entry, find the field with the trace ID (trace_id or trace.id) or span ID (span_id or span.id) and click its value.

This will open the trace view page with the selected span or the root span of the trace.

Searching for logs by tracesSearching for logs by traces

To find all logs related to a trace or particular span:

1. Open the trace you need in the trace search and select the span on the trace view page.
2. In the right-hand span details panel, click Go to logs and select Trace logs or Span logs.

This will open the Viewing logs page with a filter by trace_id or trace_id and span_id already set.