Dear All,
We are planning to Upgrade our OS from RHEL6.4 to 7.3. So, We will clone the Server and Install RHEL7.3 on Primary Server and will migrate the Applications from Cloned Server (RHEL6.4) to Primary Server.
Our Applications are Java Based Eg. Tomcat, WebLogic, JavaBased CMS.

Do we have any Migration Tool Available to Achieve it? I heard the Tool-name "Preupgrade Assistant" will help to Migrate Applications from Previous Version OS to Newer Version OS. Is that True? Kindly please help me on this.

Thanks
Jayaram

Read your other very similar thread for some answers. Migrating between two major versions (6 to 7 in this case), is NEVER advised, and sometimes not even supported. Do a clean install, do NOT 'clone' the server.

And if you have further questions about your migration tool options, I'd suggest you call Red Hat support...since you're PAYING FOR RHEL (RIGHT??), then you are also paying for support and services, such as this.

1 members found this post helpful.

I just completed a migration from CentOS 5 to CentOS 7 by creating an entirely new instance, installing all the relevant software and copying user files (including those of system users) over.
The most painful parts were the upgrade from Apache 2.0 to 2.4 and the switch from majordomo to GNU mailman for lists.
It was a very tedious process involving many trial runs before cutting over, and even then we missed things [it took 4 hours to get email working after the cutover <sigh>]

I note that the documentation says one can do an upgrade from RHEL 6 to 7 -- I'd want to dry run that until it worked before trying in "in-place"

And what TB0ne said...