Configuring Encryption for Hadoop Services
This section describes how to configure encryption for CDH services (HDFS, MapReduce, YARN, HBase, Hive, Impala, Hue and Oozie) focussing on SSL.
- Cloudera recommends securing a cluster using Kerberos authentication before enabling encryption such as SSL on a cluster. If you enable SSL for a cluster that does not already have Kerberos authentication configured, a warning will be displayed.
- The following sections assume that you have created all the certificates required for SSL communication. If not, for information on how to do this, see Creating Certificates.
- The certificates and keys to be deployed in your cluster should be organized into the appropriate set of keystores and truststores. For more information, see Creating Java Keystores and Truststores.
Hadoop Services as SSL Servers and Clients
Hadoop services differ in their use of SSL as follows:
- HDFS, MapReduce, and YARN daemons act as both SSL servers and clients.
- HBase daemons act as SSL servers only.
- Oozie daemons act as SSL servers only.
- Hue acts as an SSL client to all of the above.
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