ELK Stack

"ELK" is the acronym for three open source projects: Elasticsearch, Logstash, and Kibana.

Elasticsearch is a search and analytics engine.

Logstash is a server‑side data processing pipeline that ingests data from multiple sources simultaneously, transforms it, and then sends it to a "stash" like Elasticsearch.

Kibana lets users visualize data with charts and graphs in Elasticsearch.