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Prometheus is an open-source metrics-based monitoring system. It has a multi-dimensional data model and has a strong query language to query that data model. This blog post will discuss monitoring in general and Prometheus from a beginner’s point of view. Prometheus uses the service discovery mechanism to detect the targets in an environment. It supports integration with EC2, Consul, Kubernetes, and various other platforms to perform service discovery. The process of collecting the metrics is called scraping the targets.