It is now possible to set the user login (instead of
having it hardcoded to "docker"). Also, various actions
have been broken out in separate functions to facilitate
future maintenance.
This allows to manage groups of VMs across multiple infrastructure
providers. It also adds support to create groups of VMs on OpenStack.
WARNING: the syntax of workshopctl has changed slightly. Check READMEs
for details.
`trap ... ERR` does not automatically propagate to functions. Therefore,
Our fancy error-reporting mechanism did not catch errors happening in
functions; and we do most of the actual work in functions. The solution
is to `set -E` or `set -o errtrace`.
