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:

1. 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.

2. 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
   

3. 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...