[nova] boot from volume with root_gb=0 flavors is not allowed now
Hi everyone,
Just wanted to give a heads up about the change that recently merged in Nova which will affect Train (and current master, for deployment projects).
https://review.openstack.org/#/c/603910/
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. This is to avoid a reported security issue which we've found a while ago: https://launchpad.net/bugs/1739646
If you're using devstack, you'll probably be okay as the following change has already fixed it:
https://review.openstack.org/#/c/619319/
However, deployment projects will need to make that adjustment as well as deployers need to plan accordingly (everyone is going to upgrade to Train the day we release, right?)
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.
participants (2)
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Matt Riedemann
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Mohammed Naser