[ovirt-users] Procedure to upgrade single-host datacenter from el6 to el7

[Amit Aviram]

On Sun, Apr 24, 2016 at 4:22 PM, Rik Theys <Rik.Theys at esat.kuleuven.be>
wrote:

> Hi,
>
> If the host is the only host in the cluster and I remove the host from
> the cluster prior to the OS upgrade, is it still necessary to create a
> new cluster?
>
> Should I:
>
> A) remove the host from the cluster and add the host to a new cluster
> after the OS upgrade
>

"A" is the right thing to do. after adding the host to the new cluster,
choose to reinstall it, then activate it.


> B) remove the host from the cluster and add it to the same cluster after
> OS upgrade
> C) Keep the host in the cluster and choose the "reinstall" option after
> the OS upgrade?
>
> What does the "reinstall" option do?


Nothing special more than installing again. Still- it is recommended to
"refresh" the host's installation if you do anything significant with it,
such as upgrading its OS.


>
>
> Regards,
>
> Rik
>
> --
> Rik Theys
> System Engineer
> KU Leuven - Dept. Elektrotechniek (ESAT)
> Kasteelpark Arenberg 10 bus 2440  - B-3001 Leuven-Heverlee
> +32(0)16/32.11.07
> ----------------------------------------------------------------
> <<Any errors in spelling, tact or fact are transmission errors>>
>
> On Sun, 24 Apr 2016, Amit Aviram wrote:
>
> Hi Rik.The flow should work, as long as the OS is supported by oVirt.
>>
>> However, you will still need to move it to a new cluster.
>>
>> On Fri, Apr 22, 2016 at 3:44 PM, Rik Theys <Rik.Theys at esat.kuleuven.be>
>> wrote:
>>       Hi,
>>
>>       I'm looking for the best procedure to upgrade a host from CentOS 6
>> to
>>       CentOS 7. The host is the only host in the oVirt data center (the
>> engine
>>       is running on another machine and manages multiple data centers).
>>
>>       For datacenters with multiple hosts I followed the following steps:
>>        - Add new cluster
>>        - Put host in maintenance
>>        - Remove host from old cluster
>>        - Reinstall host
>>        - Add host to new cluster
>>        - repeat for all hosts until old cluster is empty
>>
>>       This worked OK and the data center was never "non operational".
>>
>>       Is the procedure identical for a data center with only one host?
>>
>>       Should I also remove the host from the (only) cluster in the data
>>       center, or should I reinstall it and select the "reinstall" option
>> in
>>       the oVirt web interface? Since there is only one host in the cluster
>>       there's no need to create a new cluster?
>>
>>       Is there any state on the host that I should keep when performing
>> the
>>       reinstall with CentOS 7?
>>
>>       The host is using FC storage (local disks configured as FC through
>>       multipath).
>>
>>       Regards,
>>
>>       Rik
>>
>>       --
>>       Rik Theys
>>       System Engineer
>>       KU Leuven - Dept. Elektrotechniek (ESAT)
>>       Kasteelpark Arenberg 10 bus 2440  - B-3001 Leuven-Heverlee
>>       +32(0)16/32.11.07
>>       ----------------------------------------------------------------
>>       <<Any errors in spelling, tact or fact are transmission errors>>
>>       _______________________________________________
>>       Users mailing list
>>       Users at ovirt.org
>>       http://lists.ovirt.org/mailman/listinfo/users
>>
>>
>>
>>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.ovirt.org/pipermail/users/attachments/20160424/445c13cb/attachment-0001.html>