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

Configuring an Elasticsearch cluster

This section will cover some basic Elasticsearch configuration in addition to a few changes that will positively impact your cluster's performance.

Most Elasticsearch configuration changes will be applied to elasticsearch.yml. For our installation of Elasticsearch on Ubuntu, this file is located at /etc/elasticsearch/elasticsearch.yml. Elasticsearch internal configuration changes are applied to elasticsearch.yml. Environmental variables can be set in the application's startup script. For our installation of Elasticsearch 2.3.2 on Ubuntu, these files are in the following locations:

  • Internal Configuration is located at

    /etc/elasticsearch/ elasticsearch.yml

  • Environmental Variable Configuration is located at

    /etc/defau lts/elasticsearch

Cluster name

A wonderful thing about Elasticsearch is the ease with which you can build a cluster. Elasticsearch nodes on the same local area network (LAN) will automatically form a cluster with each other if they have the...