Handle snapshots for servers with a bootable cinder volume

[kayrus]

Currently, clicking on a snapshot button of a server with a bootable volume, produces an invalid zero size qcow2 image.

A proper way for making a snapshot of an in-use bootable volume is:

• create a forced snapshot of the bootable volume
• create a volume from a snapshot
• delete snapshot
• create an image from a volume

Does it make sense just to disable a snapshot button for bootable cinder volume VMs?

[hgw77]

I guess the best way ist to disable the snapshot button