question Re: Changing IP address of hosts managed by ambari in Archives of Support Questions (Read Only)

Changing IP address of hosts managed by ambari

rahulpathak109 — Thu, 21 Jan 2016 21:19:59 GMT

I have requirement to change the ip address of all hosts managed by ambari as we are moving server to other datacenter.

Will the ip addresses be automatically updated in ambari?

Has it worked for anyone?

Note : Hosts have been added to ambari using hostname(fqdn).

Re: Changing IP address of hosts managed by ambari

nsabharwal — Thu, 21 Jan 2016 21:24:20 GMT

@Rahul Pathak

That's why we recommend to use FQDN. If you used hostnames then you don't have to do anything.

Re: Changing IP address of hosts managed by ambari

nsabharwal — Thu, 21 Jan 2016 21:26:10 GMT

@Rahul Pathak Worse case : If cluster was deployed using IP address "I have not seen any prod deployments" then you have to pay attention to things like link

Re: Changing IP address of hosts managed by ambari

rahulpathak109 — Thu, 21 Jan 2016 21:30:31 GMT

thanks, I want to make sure it is safe to do.

Re: Changing IP address of hosts managed by ambari

nsabharwal — Thu, 21 Jan 2016 21:37:11 GMT

@Rahul Pathak Please do post the outcome. Thanks for using HCC !!

Re: Changing IP address of hosts managed by ambari

rahulpathak109 — Mon, 25 Jan 2016 19:56:14 GMT

Thanks. We have successfully completed the migration.

Re: Changing IP address of hosts managed by ambari

nsabharwal — Mon, 25 Jan 2016 19:58:40 GMT

Thanks @Rahul Pathak for following up.

Re: Changing IP address of hosts managed by ambari

uk_travler — Wed, 23 Mar 2016 20:48:44 GMT

I have just done this myself with out UAT environment which we have brought in house. I have changed the IP on all the boxes and made the changes on the DNS (both forward and reverse) to reflect their new IPs.

On starting Ambari all the data nodes resolved fine but the name node is still showing the old IP in the ambari hosts data. If I ping the FQDN of the name node from the ambari box it resolves the correct IP though. Has anyone got any ideas what I need to do?

Re: Changing IP address of hosts managed by ambari

uk_travler — Wed, 23 Mar 2016 21:13:36 GMT

Not to worry, I just turned the whole envionment off and on again and it looks to have resolved my issue. I'm guessing it was a cached value in NSCD that took longer to clear than the others.