[CentOS-devel] CentOS Upgrade Tool

Am 06.01.2016 um 14:03 schrieb Karanbir Singh <mail-lists at karan.org>:
> On 06/01/16 10:27, Bruno Martins wrote:
>> Hi everyone,
>> 
>> I hope this is the best place to post this question.
>> 
>> I was wondering how can one upgrade from CentOS 6.7 to CentOS 7.x using redhat-upgrade-tool-cli in a scenario where you're upgrading an Hyper-V based VM.
>> 
> 
> step1 would be to yum erase anything that didnt come from CentOS-6
> itself, you clearly have external repos on there. And I mean not just
> remove the repos, but actually remove all the content that came from
> other places. Leave only content from base + updates for CentOS-6 itself.
> 
> secondly you need to use the centos tools from the centos repos



IMHO, I would put this effort (the above, and post activities like verify 
everything e.g. sanity-checks etc.) into a new setup + service migration. 
A more clean procedure and better reproducible ...

--
LF