Book Image

Hadoop Operations and Cluster Management Cookbook

By : Shumin Guo
Book Image

Hadoop Operations and Cluster Management Cookbook

By: Shumin Guo

Overview of this book

<p>We are facing an avalanche of data. The unstructured data we gather can contain many insights that could hold the key to business success or failure. Harnessing the ability to analyze and process this data with Hadoop is one of the most highly sought after skills in today's job market. Hadoop, by combining the computing and storage powers of a large number of commodity machines, solves this problem in an elegant way!</p> <p>Hadoop Operations and Cluster Management Cookbook is a practical and hands-on guide for designing and managing a Hadoop cluster. It will help you understand how Hadoop works and guide you through cluster management tasks.</p> <p>This book explains real-world, big data problems and the features of Hadoop that enables it to handle such problems. It breaks down the mystery of a Hadoop cluster and will guide you through a number of clear, practical recipes that will help you to manage a Hadoop cluster.</p> <p>We will start by installing and configuring a Hadoop cluster, while explaining hardware selection and networking considerations. We will also cover the topic of securing a Hadoop cluster with Kerberos, configuring cluster high availability and monitoring a cluster. And if you want to know how to build a Hadoop cluster on the Amazon EC2 cloud, then this is a book for you.</p>
Table of Contents (15 chapters)
Hadoop Operations and Cluster Management Cookbook
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Configuring job authorization with ACL


Hadoop provides two levels of job authorization: job level and queue level. When job authorization is enabled, the JobTracker will authenticate users who submit jobs to the cluster. Users' operations on jobs and queues will also be authenticated by the JobTracker. In this recipe, we will show steps to configure job authorization with ACLs.

Getting ready

We assume that our Hadoop cluster has been properly configured without any problems.

Log in to the master node from the administrator machine with the following command:

ssh hduser@master

How to do it...

Use the following steps to configure job authorization with ACLs:

  1. Enable job ACL authorization by adding the following property to the $HADOOP_HOME/conf/mapred-site.xml file:

    <property>
      <name>mapred.acls.enabled</name>
      <value>true</name>
    </property>

    Note

    This property will enable both the queue ACL and the job ACL.

  2. Configure job authorization to only allow specific users...