upgrade-model should default to using controller version

[Paul Collins]

I have a controller I bootstrapped with 2.8-rc1. I was able to upgrade the controller to 2.8-rc2 with juju upgrade-controller --agent-stream proposed.

However, Juju doesn't seem to be able to automatically upgrade the model hosted in that controller:

[agnew(~)] juju upgrade-model
best version:
    2.8.1.3647
ERROR model cannot be upgraded to 2.8.1.3647 while the controller is 2.8-rc2: upgrade 'controller' model first
[agnew(~)] juju upgrade-model --agent-stream proposed
best version:
    2.9-beta1.3650
ERROR model cannot be upgraded to 2.9-beta1.3650 while the controller is 2.8-rc2: upgrade 'controller' model first
[agnew(~)] _

However:

[agnew(~)] juju upgrade-model --agent-version 2.8-rc2
best version:
    2.8-rc2
started upgrade to 2.8-rc2
[agnew(~)] _

This seems like something Juju should be able to work out for itself.

[Paul Collins (pjdc)]

I just bootstrapped a fresh rc1 controller with the rc2 client to test something else, and now I can't upgrade at all:

[agnew(~)] juju upgrade-controller --agent-stream proposed
best version:
    2.8-rc2
started upgrade to 2.8-rc2
[agnew(~)] juju status -m controller
Model Controller Cloud/Region Version SLA Timestamp
controller betabeta localhost/localhost 2.8-rc2 unsupported 10:29:38+12:00

Machine State DNS Inst id Series AZ Message
0 started 10.9.8.197 juju-ffacfd-0 bionic Running

[agnew(~)] juju upgrade-model --agent-version 2.8-rc2
ERROR no matching agent versions available
[agnew(~)] _

I wondered if the local streams needed a prod, but:

[agnew(~)] juju upgrade-model --agent-stream proposed
best version:
    2.9-beta1.3650
ERROR model cannot be upgraded to 2.9-beta1.3650 while the controller is 2.8-rc2: upgrade 'controller' model first
[agnew(~)] juju upgrade-model --agent-version 2.8-rc2
ERROR no matching agent versions available
[agnew(~)] _

However, this worked:

[agnew(~)] juju upgrade-model --agent-version 2.8-rc2 --agent-stream proposed
best version:
    2.8-rc2
started upgrade to 2.8-rc2
[agnew(~)] _

Weird that it worked without it on my previous controller.

[Ian Booth (wallyworld)]

Juju uses --agent-stream similar to how snap uses --channel.
When you run upgrade-controller, Juju will filter the agents it selects from based on the user's desired level of risk; that's why juju doesn't work it out for itself; it must be a user driven decision.

It does look like there's an issue though in that --agent-stream proposed should not have presented "2.9-beta1.3650" as a choice.

[Tim Penhey (thumper)]

When you just run 'juju upgrade-model' with no args, the model should just be upgraded to the controller version with no simplestreams checks.

[Canonical Juju QA Bot (juju-qa-bot)]

This bug has not been updated in 2 years, so we're marking it Low importance. If you believe this is incorrect, please update the importance.