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Elasticsearch · Module 9 of 10

The Elastic Stack and observability

Elasticsearch, Kibana, Beats and Logstash together handle logs and metrics.

📖 Key ideas

  1. ELK = Elasticsearch, Logstash, Kibana; with Beats it is the Elastic Stack.
  2. Kibana Discover lets you search logs; dashboards show charts.
  3. Observability combines logs, metrics and traces.
  4. Alerts can notify the team when errors spike.
  5. Index lifecycle management (ILM) rolls over and deletes old indexes.
💡 Real-life example: Like a hospital monitor: logs are the doctor's notes, metrics are the heartbeat graph, and alerts are the alarm.
ELKElasticsearch, Logstash, Kibana
DiscoverKibana screen to search logs
ILMAutomates index rollover and deletion
ObservabilityLogs, metrics and traces together