Juju and autoload-credentials should be able to use OS_PROJECT_ID for OpenStack provider

[Nobuto Murata]

OpenStack Horizon generates openrc.sh with Keystone v3 credentials using the following template:
https://github.com/openstack/horizon/blob/master/openstack_dashboard/dashboards/project/api_access/templates/api_access/openrc.sh.template

It basically exports 9 variables below:

OS_PROJECT_ID
OS_REGION_NAME
OS_USER_DOMAIN_NAME
OS_PROJECT_NAME
OS_IDENTITY_API_VERSION
OS_PASSWORD
OS_AUTH_URL
OS_USERNAME
OS_INTERFACE

With using those environment variables, `juju autoload-credentials` generates ~/.local/share/juju/credentials.yaml as follows:

credentials:
  openstack-test:
    default-region: my_region
    my_username:
      auth-type: userpass
      domain-name: ""
      password: my_password
      project-domain-name: ""
      tenant-name: 'my_project'
      user-domain-name: my_domain
      username: my_username

If the openrc.sh contains OS_PROJECT_DOMAIN_NAME, it works. But unfortunately the Horizon openrc.sh template does not have it, Juju needs to adapt to use OS_PROJECT_ID because that's the only way to specify a project identically.

[Nobuto Murata (nobuto)]

A workaround is to specify the same domain with user-domain-name to project-domain-name by hand.

[Eric Claude Jones (ecjones)]

https://github.com/go-goose/goose/pull/56

[Heather Lanigan (hmlanigan)]

go-goose changed pulled into juju via: https://github.com/juju/juju/pull/7973

[Nobuto Murata (nobuto)]

I'm using 2.3.2-xenial-amd64, but ~/.local/share/juju/credentials.yaml still does not contain project id when I use openrc.sh. Can you please reopen this?