[ Prometheus collects and stores application metrics, while Grafana visualizes this data in dashboards, enabling proactive issue detection and resolution through alerts, transforming reactive monitoring into a proactive approach. ]
Monitoring & Observability Basics: Grafana & Prometheus đ
āĻā§āύ Monitoring āĻāϤ āĻā§āϰā§āϤā§āĻŦāĻĒā§āϰā§āĻŖ?
āĻāĻžāĻŦā§āύ āϤā§, production āĻ āĻāĻĒāύāĻžāϰ app āĻāϞāĻā§āĨ¤ āϏāĻŦāĻāĻŋāĻā§ āĻ āĻŋāĻ āĻāĻā§âĻ āĻŽāύ⧠āĻšāĻā§āĻā§āĨ¤ āĻāĻŋāύā§āϤ⧠āĻšāĻ āĻžā§ āĻāĻāĻĻāĻŋāύ client āĻĢā§āύ āĻāϰā§: âāĻāĻžāĻ, site slow āĻšāϝāĻŧā§ āĻā§āĻā§!â āĻāĻĒāύāĻŋ server āĻ āĻĸā§āĻā§ āĻĻā§āĻāϞā§āύ CPU 95%, memory leak, āĻŦāĻž DB connection floodāĨ¤ đ āϝāĻĻāĻŋ monitoring āύāĻž āĻĨāĻžāĻā§, āĻāĻĒāύāĻŋ reactive mode āĻ āĻĒāĻĄāĻŧā§ āϝāĻžāĻŦā§āύāĨ¤ đ āĻāĻŋāύā§āϤ⧠monitoring āĻĨāĻžāĻāϞā§, āϏāĻŽāϏā§āϝāĻž āĻļā§āϰ⧠āĻšāĻā§āĻžāϰ āĻāĻā§āĻ alert āĻĒā§ā§ā§ action āύāĻŋāϤ⧠āĻĒāĻžāϰāĻŦā§āύāĨ¤
đ Prometheus: The Data Collector
Prometheus āĻāĻāĻāĻŋ metrics collector āĻāĻŦāĻ time-series databaseāĨ¤ â āĻāĻāĻŋ āĻāĻĒāύāĻžāϰ servers, containers, apps āĻĨā§āĻā§ metrics scrape āĻāϰā§āĨ¤ â Powerful query language (PromQL) āĻŦā§āϝāĻŦāĻšāĻžāϰ āĻāϰ⧠data fetch āĻāϰāϤ⧠āĻĒāĻžāϰāĻŦā§āύāĨ¤ â Alertmanager āĻĻāĻŋā§ā§ āύāĻŋāϰā§āĻĻāĻŋāώā§āĻ condition āĻĒā§āϰā§āĻŖ āĻšāϞ⧠alert trigger āĻāϰāϤ⧠āĻĒāĻžāϰāĻŦā§āύāĨ¤
đ Grafana: The Dashboard King
Prometheus āϝā§āĻāĻž collect āĻāϰā§, Grafana āϏā§āĻāĻžāĻā§ eye-catching dashboards āĻ āϰā§āĻĒ āĻĻā§ā§āĨ¤ đ Custom charts, graphs, alerts āϤā§āϰāĻŋ āĻāϰ⧠āĻĒā§āϰ⧠team āĻā§ clear visibility āĻĻā§ā§āĨ¤ đ Managers āĻĨā§āĻā§ developerâāϏāĻŦāĻžāĻ āϏāĻšāĻā§ āĻŦā§āĻāϤ⧠āĻĒāĻžāϰā§āĨ¤
đ GrafanaâPrometheus Communication (How They Work Together)
Prometheus āĻāĻĒāύāĻžāϰ apps, servers, containers āĻĨā§āĻā§ metrics scrape āĻāϰ⧠āϤāĻžāϰ own time-series database āĻ store āĻāϰā§āĨ¤ Grafana āύāĻŋāĻā§ āĻā§āύ⧠data collect āĻāϰ⧠āύāĻžâđ āϏ⧠Prometheus āĻāϰ REST API āĻĨā§āĻā§ data query āĻāϰ⧠āύāĻŋā§ā§ āĻāϏā§āĨ¤ āϝāĻāύ āĻāĻĒāύāĻŋ Grafana dashboard āĻ āĻāĻāĻāĻž panel add āĻāϰā§āύ: Grafana â Prometheus āĻā§ PromQL query āĻĒāĻžāĻ āĻžā§āĨ¤ Prometheus āϏā§āĻ query āĻ āύā§āϝāĻžā§ā§ metrics data āĻĢā§āϰāϤ āĻĻā§ā§āĨ¤ Grafana āϏā§āĻ data āĻā§ āϏā§āύā§āĻĻāϰ chart, graph, gauge, āĻŦāĻž table āĻāĻāĻžāϰ⧠visualize āĻāϰā§āĨ¤ āĻāĻ separation of concern āĻāϰ āĻāĻžāϰāĻŖā§ Grafana flexible â Prometheus āĻāĻžāĻĄāĻŧāĻž InfluxDB, Loki, Elasticsearch āϏāĻš āĻāϰāĻ āĻ āύā§āĻ datasource āĻāϰ āϏāĻžāĻĨā§ āĻāĻžāĻ āĻāϰāϤ⧠āĻĒāĻžāϰā§āĨ¤ āĻāĻŋāύā§āϤ⧠Prometheus + Grafana combo DevOps community āϤ⧠de-facto standardāĨ¤
đ Basic Flow
1ī¸âŖ Prometheus install āĻ configure āĻāϰā§āύ āĻāĻĒāύāĻžāϰ targets (āϝā§āĻŽāύ Node Exporter āĻŦāĻž app metrics endpoint) āĻĨā§āĻā§ metrics scrape āĻāϰāϤā§āĨ¤ 2ī¸âŖ Grafana install āĻāϰā§āύ āĻāĻŦāĻ Prometheus āĻā§ data source āĻšāĻŋāϏā§āĻŦā§ connect āĻāϰā§āύāĨ¤ 3ī¸âŖ Dashboards āϤā§āϰāĻŋ āĻāϰ⧠CPU, memory, request latency, error rate āĻāϤā§āϝāĻžāĻĻāĻŋ track āĻāϰā§āύāĨ¤
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