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Mastering Elastic Stack

Mastering Elastic Stack

By : Kumar Gupta, Gupta
1 (1)
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Mastering Elastic Stack

Mastering Elastic Stack

1 (1)
By: Kumar Gupta, Gupta

Overview of this book

Even structured data is useless if it can’t help you to take strategic decisions and improve existing system. If you love to play with data, or your job requires you to process custom log formats, design a scalable analysis system, and manage logs to do real-time data analysis, this book is your one-stop solution. By combining the massively popular Elasticsearch, Logstash, Beats, and Kibana, elastic.co has advanced the end-to-end stack that delivers actionable insights in real time from almost any type of structured or unstructured data source. If your job requires you to process custom log formats, design a scalable analysis system, explore a variety of data, and manage logs, this book is your one-stop solution. You will learn how to create real-time dashboards and how to manage the life cycle of logs in detail through real-life scenarios. This book brushes up your basic knowledge on implementing the Elastic Stack and then dives deeper into complex and advanced implementations of the Elastic Stack. We’ll help you to solve data analytics challenges using the Elastic Stack and provide practical steps on centralized logging and real-time analytics with the Elastic Stack in production. You will get to grip with advanced techniques for log analysis and visualization. Newly announced features such as Beats and X-Pack are also covered in detail with examples. Toward the end, you will see how to use the Elastic stack for real-world case studies and we’ll show you some best practices and troubleshooting techniques for the Elastic Stack.
Table of Contents (13 chapters)
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A note for painless scripting


There are times when we use scripts, update data, scripted fields, and many more use cases. Prior to version 5.x, groovy was the default language for your scripts. We even did not specify which scripts we wanted to use back then. Since these scripts were executed remotely security was always a concern that Elastic Team had to address. This became the reason for designing Painless.

Painless is both secure and efficient when it comes to performance. It has a similar syntax as of Groovy so it is also easy to learn and use. For most of the cases, you don't need to make changes to your previously written scripts. All you need to add is a parameter called lang and specify the value as painless.

To define a variable in painless, simply use the following:

def myVar = 'my-value'; 

We don't need to specify any type. At runtime, the type of variable will be detected whatever suits appropriate. Painless supports all variable types defined by Java.

To define an array, use...

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