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

[Amit Aviram]

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
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