Book Image

Monitoring Elasticsearch

By : Dan Noble, Pulkit Agrawal, Mahmoud Lababidi
Book Image

Monitoring Elasticsearch

By: Dan Noble, Pulkit Agrawal, Mahmoud Lababidi

Overview of this book

ElasticSearch is a distributed search server similar to Apache Solr with a focus on large datasets, a schema-less setup, and high availability. This schema-free architecture allows ElasticSearch to index and search unstructured content, making it perfectly suited for both small projects and large big data warehouses with petabytes of unstructured data. This book is your toolkit to teach you how to keep your cluster in good health, and show you how to diagnose and treat unexpected issues along the way. You will start by getting introduced to ElasticSearch, and look at some common performance issues that pop up when using the system. You will then see how to install and configure ElasticSearch and the ElasticSearch monitoring plugins. Then, you will proceed to install and use the Marvel dashboard to monitor ElasticSearch. You will find out how to troubleshoot some of the common performance and reliability issues that come up when using ElasticSearch. Finally, you will analyze your cluster’s historical performance, and get to know how to get to the bottom of and recover from system failures. This book will guide you through several monitoring tools, and utilizes real-world cases and dilemmas faced when using ElasticSearch, showing you how to solve them simply, quickly, and cleanly.
Table of Contents (15 chapters)
Monitoring Elasticsearch
About the Author
About the Reviewers


In Chapter 2, Installation and the Requirements for Elasticsearch, we introduced and installed Elasticsearch-head, and now we will begin examining its features.

The Overview tab

The first tab in Elasticsearch-head is the Overview tab. This tab answers questions such as the following:

  • How many nodes are in the cluster?

  • Is the cluster in a healthy state?

  • Is all of the cluster's data available?

  • How many indices are in the cluster, and how big are they?

  • How much data is in the cluster?

Users can also use this tab to perform some basic administrative actions (creating indices, deleting indices, and so on).

After loading in sample Twitter data from the previous section, our Overview tab looks like the following:

We can see that three nodes are up and running:

  • elasticsearch-node-01

  • elasticsearch-node-02

  • elasticsearch-node-03

We also have one active index that contains our newly loaded Twitter data. From this page, we can tell the following:

  • The Twitter index takes up 456 MB

  • The Twitter...