Book Image

Hadoop 2.x Administration Cookbook

By : Aman Singh
Book Image

Hadoop 2.x Administration Cookbook

By: Aman Singh

Overview of this book

Hadoop enables the distributed storage and processing of large datasets across clusters of computers. Learning how to administer Hadoop is crucial to exploit its unique features. With this book, you will be able to overcome common problems encountered in Hadoop administration. The book begins with laying the foundation by showing you the steps needed to set up a Hadoop cluster and its various nodes. You will get a better understanding of how to maintain Hadoop cluster, especially on the HDFS layer and using YARN and MapReduce. Further on, you will explore durability and high availability of a Hadoop cluster. You’ll get a better understanding of the schedulers in Hadoop and how to configure and use them for your tasks. You will also get hands-on experience with the backup and recovery options and the performance tuning aspects of Hadoop. Finally, you will get a better understanding of troubleshooting, diagnostics, and best practices in Hadoop administration. By the end of this book, you will have a proper understanding of working with Hadoop clusters and will also be able to secure, encrypt it, and configure auditing for your Hadoop clusters.
Table of Contents (20 chapters)
Hadoop 2.x Administration Cookbook
Credits
About the Author
About the Reviewers
www.PacktPub.com
Customer Feedback
Preface
Index

In-transit encryption


In this recipe, we will configure in-transit encryption for securing the transfer of data between nodes during the shuffle phase. The mapper output is consumed by reducers, which can run on different nodes, so to secure the transfer channel, we secure the communication between Mappers and Reducers. We will be securing the RPC communication channel as well, although it induces a slight overhead and must be setup only if it is absolutely necessary.

Getting ready

To complete the recipe, the user must have completed the previous Configure SSL in Hadoop recipe. We will be extending the configuration already set up in that section by adding a few more options.

Note

It is recommended that the users explore SSL and learn more about ciphers to understand its security and performance implications.

How to do it...

  1. Connect to the nn1.cluster1.com master node and switch to user hadoop.

  2. To enable RPC privacy, edit core-site.xml to add the following lines on each node in the cluster:

    &lt...