Comment 2 for bug 2058714

Actually, the argument I was looking at is not used, but is taken from the cloud definition.

If am using 3.4 here...

Juju will prevent you from setting an invalid region with the default-region command.

Once set, "juju show-cloud google" gives me:

defined: public
type: gce
description: Google Cloud Platform
auth-types: [jsonfile, oauth2]
default-region: europe-west4
credential-count: 1
...

Then bootstrapping does create an instance in that region.

What version of Juju are you using?