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Observability · medium

2. Prometheus, Metrics & OpenTelemetry

The 3 pillars of observability: Metrics, Logs, and Distributed Tracing.

1 min read2 questionsup to 50 XPtopic 2/4

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- Prometheus: Time-series database pulling pull-based metrics (Counter, Gauge, Histogram) queried via PromQL. - OpenTelemetry (OTel): Vendor-neutral framework standardizing Trace Context propagation (W3C `traceparent`), spans, and OpenTelemetry Collectors.

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Check your understanding

  1. 1. What Prometheus metric type is suitable for measuring continuously incrementing values (e.g. total HTTP requests)?

  2. 2. How does OpenTelemetry propagate distributed trace IDs across microservice network boundaries?

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