Monitoring and Observability: Prometheus, Alertmanager and Grafana
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Lesson 3 of 8 · Fundamentals

PromQL: querying metrics

45 min Debian 12

Objective

Learn to write the PromQL queries you will need every day: select series, turn a counter into a rate, aggregate by label, compute an error rate, a CPU percentage, a latency percentile, and anticipate a full disk.

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