[openstack-dev] [Nova] Support specified volume_type when boot instance, do we like it?

Jordan Pittier jordan.pittier at scality.com
Mon Aug 29 13:06:34 UTC 2016

On Mon, Aug 29, 2016 at 8:50 AM, Zhenyu Zheng <zhengzhenyulixi at gmail.com>

> Hi, all
> Currently we have customer demands about adding parameter "volume_type" to
> --block-device to provide the support of specified storage backend to boot
> instance. And I find one newly drafted Blueprint that aiming to address the
> same feature: https://blueprints.launchpad.net/nova/+spec/support
> -boot-instance-set-store-type ;
> As I know this is kind of "proxy" feature for cinder and we don't like it
> in general, but as the boot from volume functional was already there, so
> maybe it is OK to support another parameter?
> So, my question is that what are your opinions about this in general? Do
> you like it or it will not be able to got approved at all?
> Thanks,
> Kevin Zheng

I think it's not a great idea. Not only for the reason you mention, but
also because the "nova boot" command is already way to complicated with way
to many options. IMO we should only add support for new features, not
"features" we can have by other means, just for convenience.

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