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Elasticsearch Cluster Health API

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2023

The Elasticsearch Health API provides a comprehensive diagnosis of cluster health, going beyond basic shard status to perform root cause analysis for unhealthy indices and data streams. It introduces modular health indicators for various components like master stability, repository integrity, shard availability, disk space, Index Lifecycle Management (ILM), and Snapshot Lifecycle Management (SLM). The API offers both a high-level status and detailed reporting with actionable resolution steps. In 8.9, the ILM Health Indicator is enhanced with new rules to detect ILM policies stuck in specific steps for too long, providing early warnings and actionable insights for performance and stability issues. This indicator will also appear in the Elastic Cloud Deployments console.

2023

Elastic Stack 8.9: Faster aggregations and cross-cluster searches

7/25/2023

Introduced new rules to the ILM Health Indicator within the Health Report API to detect when ILM policies are stuck in specific steps for extended periods or have exceeded retry thresholds. This enhancement aims to provide earlier detection of potential performance and stability issues related to ILM, with configurable time and retry thresholds. The indicator will also be visible in the Elastic Cloud Deployments console.

In search of a cluster health diagnosis: Introducing the Elasticsearch Health API

3/30/2023

Introduces the new Elasticsearch Health API, which performs root cause analysis for cluster health issues. Details the API's design principles, operating modes (high-level and detailed reporting), and the concept of health indicators. Explains individual indicators such as master_is_stable, repository_integrity, shards_availability, disk, ilm, and slm, along with their respective statuses (green, yellow, red, unknown) and symptoms. Provides examples of API responses for a healthy cluster.