tree 64947d5ea3a8d950b3ffeebb278c74cd548583e0
parent b392e07185e802524fd0d9749b3346c7c1ce4283
author Brad Fitzpatrick <bradfitz@golang.org> 1558123693 +0000
committer Brad Fitzpatrick <bradfitz@golang.org> 1558456928 +0000

dashboard, buildlet, cmd/debugnewvm: clean up HostConfig.ContainerVMImage

The debugnewvm command was printing out the wrong VM name, since the
old method had also assumed (but not documented) that it only applied
to nested virtualization containers. But remove that requirement and
make the empty string mean unspecified instead (which we currently
mean to use Container-Optimized OS) role and then use its new
definition.

Change-Id: Ieca138285aa567b1c24d585c5aa180f8a1534154
Reviewed-on: https://go-review.googlesource.com/c/build/+/177919
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>