Prometheus Fundamentals

Summary

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.

• 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.