if present. Otherwise fallback to to source image min disk value (if
set) or calculated from the source image bytes size.
Note that in some cases this needs to be specified, if
`use_blockstorage_volume` is true. See #6957 for the discussion.
Add a step of detaching Compute instance volume if it's created using
the Block Storage service.
It is needed to create a final image.
This commit also moves common volume functions to a different file and
fixes some messages in the StepCreateVolume.
This commit allows user to use the Block Storage v3 volume as the
Compute instance root volume.
Also it adds new volume-related parameters to the builder.
Pratyush singhal
Adrien Delorme
Johannes J. Schmidt
Megan Marsh
Rickard von Essen
Daisuke Takahashi
Andrei Ozerov