Elasticsearch: Cluster Monitoring Guide

Kacper Bąk
3 min readAug 16, 2023

Introduction

In the evolving digital landscape, data is crucial. As businesses expand their digital footprints, the need for effective tools to manage, search, and analyze large datasets becomes essential. Elasticsearch, a highly scalable open-source full-text search and analytics engine, is an invaluable tool in this context. To fully understand its potential and its bottlenecks, monitoring the cluster becomes necessary. Here’s how you can enable Elasticsearch Cluster Monitoring for better data insights.

Elasticsearch logo representing advanced data analysis and search capabilities.
Elasticsearch logo representing advanced data analysis and search capabilities.

Why Monitor Your Elasticsearch Cluster?

Before diving into the “how”, it’s essential to understand the “why”. By enabling monitoring on your Elasticsearch cluster:

  • You gain insights into cluster performance.
  • Diagnose and troubleshoot issues quicker.
  • Make data-driven decisions for scaling and optimizing.

Steps to Enable Elasticsearch Cluster Monitoring

Understand Your Cluster

Before making any changes, it’s pivotal to understand your setup. The Elasticsearch cluster used in this example is a 3-node cluster with Kibana, primarily for proof of concept.

Schematic representation of a 3-node Elasticsearch cluster showing one master node and two data nodes interconnected.
Schematic representation of a 3-node Elasticsearch cluster showing one master node and two data nodes interconnected.

Access Kibana

Kibana is a visualization tool that offers a real-time summary of your data stored in Elasticsearch. To begin the monitoring process, access your Kibana instance. It’s typically accessible via a web browser.

Kibana’s user-friendly dashboard showcasing data visualization tools and features.
Kibana’s user-friendly dashboard showcasing data visualization tools and features.

Enable the Collection of Monitoring Data

In the Kibana console tool, execute the following command:

PUT _cluster/settings
{
"persistent": {
"xpack.monitoring.collection.enabled": true
}
}

This command ensures that your Elasticsearch cluster starts collecting monitoring data.

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