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DevOps & Automation · Foundational

Elastic Stack (ELK)

A log and search platform made up of Elasticsearch, Logstash, Kibana, and Beats, commonly called the ELK stack.

Definition

Beats or Logstash collect and transform data, Elasticsearch indexes and searches it, and Kibana visualizes it. It is widely used for centralized logging, security analytics, and APM.

Example

Filebeat ships nginx access logs to Elasticsearch and Kibana dashboards show 4xx/5xx trends.

Exam tip

Know each component's role: E = search/storage, L = processing pipeline, K = visualization.

Related terms