ELK (or Elastic stack) is the name for the Elasticsearch/Logstash/Kibana stack. Logstash gets log information, reports it to Elasticsearch for searching, and Kibana lets you analyze it. While the tools work independently, and with other software, they play together especially well. To understand what’s going on, let’s look at each one individually. This guide is meant to be a bit of a guided tour to each of these services.
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