Can you explain how the Prometheus monitoring system works?
sobes.tech AI
Answer from AI
Prometheus is an open-source monitoring and alerting system focused on collecting metrics from various sources.
How Prometheus works:
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Metrics collection (scraping): Prometheus periodically polls (scrapes) HTTP endpoints of applications or services that expose metrics in a specific format.
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Data storage: The collected metrics are stored in its own time-series database optimized for time-series data.
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Query language (PromQL): A powerful query language, PromQL, is used for analyzing and aggregating metrics.
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Visualization and alerts: Dashboards (e.g., via Grafana) can be built based on queries, and alerting rules can be configured.
Example: an application exposes metrics at /metrics, and Prometheus is configured to regularly scrape this endpoint. Metrics can include request count, response time, resource usage, etc.