Comment 13 for bug 1966664

@hmlanigan sure:

$ juju add-model chtest
Added 'chtest' model on stsstack/stsstack with credential 'hopem' for user 'admin'
$ cat bundle.yaml
series: focal
applications:
  neutron-api:
    num_units: 1
    charm: ch:neutron-api
    channel: xena/edge
$ juju deploy ./bundle.yaml
Located charm "neutron-api" in charm-hub, channel xena/edge
Executing changes:
- upload charm neutron-api from charm-hub for series focal from channel xena/edge with architecture=amd64
- deploy application neutron-api from charm-hub on focal with xena/edge
  added resource policyd-override
- add unit neutron-api/0 to new machine 0
Deploy of bundle completed.
$ juju status neutron-api| grep Rev -A 1
App Version Status Scale Charm Channel Rev Exposed Message
neutron-api waiting 0/1 neutron-api xena/edge 522 no waiting for machine
$ vi bundle.yaml
$ cat bundle.yaml
#series: focal
applications:
  neutron-api:
    num_units: 1
    charm: ch:neutron-api
    channel: xena/edge
$ juju deploy ./bundle.yaml
Located charm "neutron-api" in charm-hub, channel xena/edge
Executing changes:
- upload charm neutron-api from charm-hub from channel xena/edge with architecture=amd64
- upgrade neutron-api from charm-hub using charm neutron-api from channel xena/edge
  added resource policyd-override
- set constraints for neutron-api to ""
Deploy of bundle completed.
$ juju status neutron-api| grep Rev -A 1
App Version Status Scale Charm Channel Rev Exposed Message
neutron-api waiting 0/1 neutron-api xena/edge 501 no waiting for machine