Comment 13 for bug 1567169

Noting a workaround that may help some people.

Rather than deploying a service to an existing machine, it is possible to deploy to a service to an existing service.

For example if you add the following newservice in your bundle which will deploy to the same machine as existingservice/0.

  newservice:
    charm: "cs:xenial/ubuntu"
    num_units: 1
    to:
    - lxd:existingservice/0

So in order to address particular machines, you can deploy a service to each machine using the ubuntu charm. Then you can address the machine using that service.