In short
The dominant open-source metrics collection and alerting system in the Kubernetes/cloud-native world — it pulls (scrapes) metrics from targets on a schedule and stores them as time-series data.
How to learn this
- 1Set up a local Prometheus instance and configure it to scrape a sample application's metrics.
- 2Learn the basic PromQL query syntax to retrieve and aggregate a metric.
- 3Understand why Prometheus's pull model differs from traditional push-based monitoring systems.
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