ELK全称是ElasticSearch+LogStash+Kibana，这个框架是比较流行的日志收集和数据分析框架。
ElasticSearch与Kibana结合使用，使搜索数据在Web界面中展示，便于分析整理。
https://www.elastic.co/guide/en/kibana/current/getting-started.html
Kibana is:
An open-source analytics and visualization platform. Use Kibana to explore your Elasticsearch data, and then build beautiful visualizations and dashboards.
A UI for managing the Elastic Stack. Manage your security settings, assign user roles, take snapshots, roll up your data, and more — all from the convenience of a Kibana UI.
A centralized hub for Elastic’s solutions. From log analytics to document discovery to SIEM, Kibana is the portal for accessing these and other capabilities.
可以说，Kibana就是为ElasticSearch提供图形界面和数据分析的。