what is prometheus

Prometheus is an open-source monitoring system and time series database. It is a core technology for monitoring and observability of systems, offering a robust data model, a query language, and scalability. Originally built at SoundCloud in 2012, it collects metrics data from instrumented jobs and stores it in a time series database. Prometheus is designed for reliability and is used for machine-centric monitoring as well as monitoring of highly dynamic service-oriented architectures. It is also considered an open-source systems monitoring and alerting toolkit, and it works well for recording any purely numeric time series