question Re: How to change the host name, IP and domain name of a running HDP cluster? in Archives of Support Questions (Read Only)

How to change the host name, IP and domain name of a running HDP cluster?

SuryaNarayana — Wed, 08 Mar 2017 19:26:50 GMT

Dear Team,

Presently an Ambari managed HDP cluster is running perfectly alright. Due to a change of ownership of the infrastructure, there is a change in the IP ranges, hostnames and domain names of the hosts.

So, I have to apply the changes while the cluster is running as usual (or may be with a minimal outages.)

Someone might have done this exercise before. Please share any reference links and/or steps you might have documented.

Do we have any scripts already come with the installation?

Thanks in advance.

The following information may help:

Ambari version 2.4.x

HDP version 2.5

Kerberos - Not Enabled

AD integrated - Yes

SSL certificates - None

Thanks

Surya

Re: How to change the host name, IP and domain name of a running HDP cluster?

jsensharma — Wed, 08 Mar 2017 19:45:37 GMT

@Surya Rao

FQDN is recommended for reasons like changing IP in the environment does not require any changes in the cluster or users does not need to have local /etc/hosts in their env to reach the cluster.

From ambari side although you can change the hostnames as mentioned in : https://docs.hortonworks.com/HDPDocuments/Ambari-2.2.2.18/bk_ambari-reference/content/ch_changing_host_names.html

ambari-server update-host-names host_names_changes.json

Re: How to change the host name, IP and domain name of a running HDP cluster?

jsensharma — Wed, 08 Mar 2017 20:02:58 GMT

@Surya Rao

Although It is strongly recommended to not change hostname/IPAddress of HDP cluster nodes. Hortonworks support / engineering assistance might be needed in such scenario as it might impact the whole cluster.

You also might want to refer to the following article:

https://community.hortonworks.com/content/supportkb/48815/how-to-change-ip-address-for-a-datanode.html