Arvados

You should be able to run source:tools/compute-images/build.sh with an Ubuntu --ami-id and the right other options and it works without additional modification. After #22217 gets merged, known things that need to happen include:

• the names of block devices in source:tools/compute-images/arvados-compute-aws.json need to follow /dev/sdaN pattern instead of /dev/xvd_. This will probably need to be made an option to build.sh.

There may be others. The requirement of this ticket is the branch can successfully run packer-build-compute-image on different versions of Ubuntu AMIs.