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Hadoop 2.x Administration Cookbook

You're reading from   Hadoop 2.x Administration Cookbook Administer and maintain large Apache Hadoop clusters

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Product type Paperback
Published in May 2017
Publisher Packt
ISBN-13 9781787126732
Length 348 pages
Edition 1st Edition
Tools
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Author (1):
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Aman Singh Aman Singh
Author Profile Icon Aman Singh
Aman Singh
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Table of Contents (20) Chapters Close

Hadoop 2.x Administration Cookbook
Credits
About the Author
About the Reviewers
www.PacktPub.com
Customer Feedback
Preface
1. Hadoop Architecture and Deployment FREE CHAPTER 2. Maintaining Hadoop Cluster HDFS 3. Maintaining Hadoop Cluster – YARN and MapReduce 4. High Availability 5. Schedulers 6. Backup and Recovery 7. Data Ingestion and Workflow 8. Performance Tuning 9. HBase Administration 10. Cluster Planning 11. Troubleshooting, Diagnostics, and Best Practices 12. Security Index

Configuring HA for Edge nodes


Edge node is the access point for the cluster and it is always good to have multiple nodes to load balance and also to maintain high availability in case one node goes down.

This can be done in multiple ways, by either using a dedicated hardware load balancer in front of Edge nodes or by setting a DNS round robin with a health check.

Getting ready

Make sure that the user has a running cluster with at least two Edge nodes with Hadoop installed. Refer to Chapter 1, Hadoop Architecture and Deployment, for Edge node and DNS configurations. It is presumed that the users are aware about the working of DNS and is from Linux Administration background.

How to do it...

  1. Connect to the client1.cyrus.com Edge node.

  2. Check the DNS resolution of the node using the following command:

    $ nslookup client1.cyrus.com
    
  3. The preceding command will return an IP address, something like 10.0.0.11.

  4. Check the resolution on the other Edge node client2.cyrus.com as well. It will also return an IP...

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