Configure DNS

You must configure your edge node to perform forward and reverse DNS lookups with your Cloudera Operational Database (COD). Obtain the private IP address of your CDP environment and configure your edge node to resolve hostnames from your COD. An edge node must resolve the hostnames from your COD.

Each CDP environment acts as its own DNS nameserver. Obtain the private IP address information of your environment and configure resov.conf on your edge node to list your CDP environment's private IP address as a nameserver.

Go to the Management Console.
Click Environments and select your environment from the list.
Click Summary.
Find the FreeIPA section and copy the contents of the Private IP field.
Add the private IP address as a nameserver to the /etc/resolv.conf file in your edge node. You can do this using the cat resolv.conf nameserver [***NAMESERVER IP ADDRESS***] command.

note
When the server running application with HBase client cannot be set up with reverse DNS lookup and can only perform forward DNS, then the hbase.unsafe.client.kerberos.hostname.disable.reversedns property can be set to true at the client configuration. So that HBase client connects to the HBase cluster through SASL Kerberos using the hostname of the principal and skips the reverse DNS lookup.