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System Observability: Logging, Metrics & Tracing (ELK + OpenTelemetry) · Lesson

Index Lifecycle Management (ILM)

Master Index Lifecycle Management to automate rollover, the hot-warm-cold architecture, and retention so log indices stay fast and storage stays under control.

Why Manage Index Lifecycle?

Time-series data like logs grows endlessly. Index Lifecycle Management (ILM) automates moving, shrinking, and deleting indices so old data does not crush your cluster.

Rollover

Rollover creates a new index when the current one hits a size, age, or document count threshold. Writes always go to a single alias.

rollover:
  max_size: 50gb
  max_age: 1d
  max_docs: 100000000

All lessons in this course

  1. Elasticsearch Query Language (DSL)
  2. Logstash Filters and Pipelines
  3. Kibana Discover and Lens
  4. Index Lifecycle Management (ILM)
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