Re: [nova] boot from volume with root_gb=0 flavors is not allowed now

On 2/18/2019 12:46 PM, Mohammed Naser wrote:

As of that change, Nova will no longer allow you to to create a VM when the root_gb of a flavor is set to 0.

Slight correction - nova will no longer allow this *by default* (it's configurable in policy if you need the old unsafe behavior) for *non-volume-backed* servers. If you're doing boot-from-volume then you can still use flavors with root_gb=0 since that doesn't apply to the root volume.