[ovirt-users] Migrating hosts from RHEL6 to RHEL7

[matthew lagoe]

It is possible to migrate a VM from 6 to 7 it is recommended however that 
you don't do a live migration and that you power off the VM and then turn 
it back on on the cluster running version 7

"Groten, Ryan" <Ryan.Groten at stantec.com> wrote:

Has anyone succeeded in upgrading their hosts OS version from 6 to 7?  I 
assumed it could be done without downtime and one host at a time, but when 
trying it out I found that RHEL7 hosts can't be placed in the same Cluster 
as RHEL6 ones.
I then tried making a new Cluster and migrating VMs from the RHEL6 cluster 
to RHEL7.  Initial testing seems to show that it works from RHEL6 to RHEL7 
but not the other way around.  Also when I select this option a warning 
pops up saying "Choosing different cluster may lead to unexpected results.  
Please consult documentation."

I looked in the Admin Guide and Technical Reference Guide but don't see 
where these unexpected results are mentioned.

Thanks,
Ryan Groten
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