Prometheus

Prometheus is an open-source systems monitoring and alerting toolkit originally developed at SoundCloud in 2012. They has since become a standalone open-source project maintained independently of any company and is now part of the Cloud Native Computing Foundation. Prometheus is designed to collect and store metrics as time series data, which means that metrics information is stored with the timestamp at which it was recorded, along with optional key-value pairs called labels. The core of Prometheus is its multi-dimensional data model, which allows for the identification of time series data by metric name and key/value pairs. This model is leveraged by Prometheus's flexible query language, PromQL, which enables users to extract and analyze data efficiently. Prometheus operates on a pull model, where it scrapes metrics from instrumented jobs, either directly or via an intermediary push gateway for short-lived jobs. This approach ensures that single server nodes are autonomous and do not rely on distributed storage.

Prometheus is a Go-based system with various components, including a main server, client libraries, a push gateway, special-purpose exporters for HAProxy and Graphite services, and an alert manager. These components are easy to build and deploy as static binaries. Prometheus also integrates with visualization tools like Grafana, enabling users to create detailed dashboards and graphs.

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