virt-install: changing default --os-variant behavior
Cole Robinson
crobinso at redhat.com
Tue Sep 22 15:47:40 UTC 2020
On 9/20/20 4:46 PM, Peter Crowther wrote:
> On Sun, 20 Sep 2020 at 21:10, Cole Robinson <crobinso at redhat.com
> <mailto:crobinso at redhat.com>> wrote:
> [...]
>
> 2) Default to --os-variant detect=on,name=<virtio-something>. 'give me
> virtio' is representative of what most virt-install users want. But this
> adds some new corner cases, ex if anyone is using virt-install with
> windows up until now they could get away without specifying a
> --os-variant and things would generally work, but now if we default to
> virtio windows out of the box is not going to install. I kinda doubt
> many people are using virt-install with windows though.
>
>
> As feedback, this is the single largest use case in the main
> virtualisation cluster I manage. CentOS hosts, 90% Windows 7(!) and 8.1
> guests. We have our virt-install scripted to add a floppy drive with
> autoinstall file, virtio drivers, and a few other bits and pieces like a
> minimal puppet client install (surprisingly non-trivial in Windows 7
> gold), so we could live with such a change; but please don't assume that
> if the hosts are Linux then the guests are also likely to be Linux.
>
Thanks for the info. I don't expect we will go this route.
But presumably you are already specifying an --os-variant though? In
which case you would be fine even if the default changes.
If you aren't using --os-variant there's a chance that media OS
detection could fail (if you started using a new/updated windows ISO
that osinfo-db doesn't detect correctly) and then virt-install would
start generating different configurations on you.
- Cole
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