6. Implementing Security Using Kerberos | Cloudera Administration Handbook

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Cloudera Administration Handbook

By : Menon

3.5 (10)

Cloudera Administration Handbook

3.5 (10)

By: Menon

Overview of this book

An easy-to-follow Apache Hadoop administrator’s guide filled with practical screenshots and explanations for each step and configuration. This book is great for administrators interested in setting up and managing a large Hadoop cluster. If you are an administrator, or want to be an administrator, and you are ready to build and maintain a production-level cluster running CDH5, then this book is for you.

Preface

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Free Chapter

1. Getting Started with Apache Hadoop

1. Getting Started with Apache Hadoop

History of Apache Hadoop and its trends

Components of Apache Hadoop

Understanding the Apache Hadoop daemons

Introducing Cloudera

Introducing CDH

Responsibilities of a Hadoop administrator

Summary

2. HDFS and MapReduce

2. HDFS and MapReduce

Essentials of HDFS

The read/write operational flow in HDFS

Understanding the namenode UI

Understanding the secondary namenode UI

Exploring HDFS commands

Getting acquainted with MapReduce

Summary

3. Cloudera's Distribution Including Apache Hadoop

3. Cloudera's Distribution Including Apache Hadoop

Getting started with CDH

Understanding the CDH components

Installing CDH

Installing the CDH components

Summary

4. Exploring HDFS Federation and Its High Availability

4. Exploring HDFS Federation and Its High Availability

Implementing HDFS Federation

Implementing HDFS High Availability

Jobtracker high availability

Summary

5. Using Cloudera Manager

5. Using Cloudera Manager

Introducing Cloudera Manager

Understanding the Cloudera Manager architecture

Installing Cloudera Manager

Navigating the Cloudera Manager Web console

Configuring High Availability using Cloudera Manager

Summary

6. Implementing Security Using Kerberos

6. Implementing Security Using Kerberos

Understanding authentication and authorization

Introducing Kerberos

Understanding the Kerberos Architecture

Installing Kerberos

Configuring Kerberos for Apache Hadoop

Authorization in Apache Hadoop

Summary

7. Managing an Apache Hadoop Cluster

7. Managing an Apache Hadoop Cluster

Configuring Hadoop services using Cloudera Manager

Role management in Cloudera Manager

Managing hosts using Cloudera Manager

Managing multiple clusters with Cloudera Manager

Rebalancing a Hadoop cluster from Cloudera Manager

Summary

8. Cluster Monitoring Using Events and Alerts

8. Cluster Monitoring Using Events and Alerts

Monitoring Hadoop services from Cloudera Manager

Understanding events and alerts

Summary

9. Configuring Backups

9. Configuring Backups

Understanding backups

Understanding HDFS backups

Using the distributed copy (DistCp)

Configuring backups using Cloudera Manager

Summary

Index

Index

Installing Kerberos

Before we get started with configuring Kerberos for Apache Hadoop, we need to set up the KDC and the different nodes on the cluster with the required packages.

Configuring the KDC Server

KDC is the Kerberos server and should be the first step in configuring Kerberos on the cluster. The following are the steps to install the server packages:

Choose a node on the cluster that you would want to set up as the KDC. Ideally, this node should be used exclusively for the KDC; however, for this demonstration, I am using node1.hcluster for the KDC.
Install the krb5-libs, krb5-server, and krb5-workstation packages on the KDC node. Use the following commands as the root user to install the packages:
```
$ yum install krb5-libs
$ yum install krb5-server
$ yum install krb5-workstation
```

Update the krb5.conf file in the /etc/ folder from the root user as shown in the following code:

[logging]
 default = FILE:/var/log/krb5libs.log
 kdc = FILE:/var/log/krb5kdc.log
 admin_server = FILE:/var/log/kadmind...

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