Can't deploy ubuntu@24.04 using add_machine

[gboutry]

Description

Model.add_machine takes only a series parameters, when using jammy, everything works as expected, but when using noble, the machine is still deployed as jammy

python-libjuju/juju/model.py

Line 1469 in f87b50c

async def add_machine(

Urgency

Blocker for our release

Python-libjuju version

3.6.0.0

Juju version

3.6.0

Reproduce / Test

In a machine model supporting adding machines:

MAAS example

name = 'system-id=weBqr6'
await model.add_machine(spec=model.uuid + ":" + name, series="noble")

ubuntu@reproducer-gboutry-project-bastion:~$ juju machines -m openstack-machines
Machine  State    Address       Inst id                     Base          AZ       Message
0        started  10.149.73.19  reproducer-gboutry-hosts-0  ubuntu@22.04  default  Deployed
1        started  10.149.73.20  reproducer-gboutry-hosts-1  ubuntu@22.04  default  Deployed
2        started  10.149.73.21  reproducer-gboutry-hosts-2  ubuntu@22.04  default  Deployed

[gboutry]

This might be an issue with the whole series to base migration?

[gboutry]

Using the base ubuntu@24.04 instead of series noble in series argument does not work either.

[dimaqq]

The migration has not begun in this library.

The migration is already basically over in Juju, where the library uses the deprecated API fields.

The Juju team will often ask for jRPC dump, which you get by configuring Python logging:

    logging.basicConfig(level="INFO")
    logging.getLogger("juju.client.connection").setLevel("DEBUG")

[gboutry]

[11:26:15] DEBUG    connection id: 140675648335328 ---> {                                                                                                                                                                               connection.py:564
                      "type": "MachineManager",                                                                                                                                                                                                          
                      "request": "AddMachines",                                                                                                                                                                                                          
                      "version": 10,                                                                                                                                                                                                                     
                      "params": {                                                                                                                                                                                                                        
                        "params": [                                                                                                                                                                                                                      
                          {                                                                                                                                                                                                                              
                            "addresses": [],                                                                                                                                                                                                             
                            "base": null,                                                                                                                                                                                                                
                            "constraints": null,                                                                                                                                                                                                         
                            "container-type": null,                                                                                                                                                                                                      
                            "disks": [],                                                                                                                                                                                                                 
                            "hardware-characteristics": null,                                                                                                                                                                                            
                            "instance-id": null,                                                                                                                                                                                                         
                            "jobs": [                                                                                                                                                                                                                    
                              "JobHostUnits"                                                                                                                                                                                                             
                            ],                                                                                                                                                                                                                           
                            "nonce": null,                                                                                                                                                                                                               
                            "parent-id": null,                                                                                                                                                                                                           
                            "placement": {                                                                                                                                                                                                               
                              "directive": "system-id=knabkt",                                                                                                                                                                                           
                              "scope": "0a70a0bb-b814-4bfd-8a97-be0953e3fd03"                                                                                                                                                                            
                            }                                                                                                                                                                                                                            
                          }                                                                                                                                                                                                                              
                        ]                                                                                                                                                                                                                                
                      },                                                                                                                                                                                                                                 
                      "request-id": 7                                                                                                                                                                                                                    
                    }                                                                                                                                                                                                                                    
           DEBUG    Pinger <Task pending name='Task_Pinger' coro=<Connection._pinger() running at /snap/openstack/x1/lib/python3.12/site-packages/juju/client/connection.py:521> wait_for=<Future pending cb=[Task.task_wakeup()]>>:    connection.py:513
                    pinging                                                                                                                                                                                                                              
           DEBUG    connection id: 140675647850592 ---> {                                                                                                                                                                               connection.py:564
                      "type": "Pinger",                                                                                                                                                                                                                  
                      "request": "Ping",                                                                                                                                                                                                                 
                      "version": 1,                                                                                                                                                                                                                      
                      "params": {},                                                                                                                                                                                                                      
                      "request-id": 7                                                                                                                                                                                                                    
                    }                                                                                                                                                                                                                                    
           DEBUG    Pinger <Task pending name='Task_Pinger' coro=<Connection._pinger() running at /snap/openstack/x1/lib/python3.12/site-packages/juju/client/connection.py:521> wait_for=<Future pending cb=[Task.task_wakeup()]>>:    connection.py:513
                    pinging                                                                                                                                                                                                                              
           DEBUG    connection id: 140675648335328 ---> {                                                                                                                                                                               connection.py:564
                      "type": "Pinger",                                                                                                                                                                                                                  
                      "request": "Ping",                                                                                                                                                                                                                 
                      "version": 1,                                                                                                                                                                                                                      
                      "params": {},                                                                                                                                                                                                                      
                      "request-id": 8                                                                                                                                                                                                                    
                    }                                                                                                                                                                                                                                    
           DEBUG    connection id : 140675647850592 <--- {'request-id': 7, 'response': {}}                                                                                                                                              connection.py:590
           DEBUG    connection id : 140675648335328 <--- {'request-id': 8, 'response': {}}                                                                                                                                              connection.py:590
           DEBUG    connection id : 140675648335328 <--- {'request-id': 7, 'response': {'machines': [{'machine': '0'}]}}                                                                                                                connection.py:590
           DEBUG    connection id : 140675648335328 <--- {'request-id': 6, 'response': {'deltas': [['machine', 'change', {'model-uuid': '0a70a0bb-b814-4bfd-8a97-be0953e3fd03', 'id': '0', 'instance-id': '', 'agent-status':           connection.py:590
                    {'current': 'pending', 'message': '', 'since': '2024-12-02T11:26:15.713037639Z', 'version': ''}, 'instance-status': {'current': 'pending', 'message': '', 'since': '2024-12-02T11:26:15.713037639Z', 'version':                      
                    ''}, 'life': 'alive', 'base': 'ubuntu@22.04', 'container-type': '', 'supported-containers': None, 'supported-containers-known': False, 'jobs': ['JobHostUnits'], 'addresses': None, 'has-vote': False,                               
                    'wants-vote': False}]]}}                                                                                                                                                                                                             
           DEBUG    connection id: 140675648335328 ---> {                                                                                                                                                                               connection.py:564
                      "type": "AllWatcher",                                                                                                                                                                                                              
                      "request": "Next",                                                                                                                                                                                                                 
                      "version": 3,                                                                                                                                                                                                                      
                      "params": {},                                                                                                                                                                                                                      
                      "Id": "1",                                                                                                                                                                                                                         
                      "request-id": 9                                                                                                                                                                                                                    
                    } 

[gboutry]

Looks like series is not transmitted on the rpc

[dimaqq]

I guess either support for base= needs to be added or facade version restricted to some older facade where series= argument is still available.

[gboutry]

I think series=jammy worked by luck because that was the default by juju / maas, because looking at the _definitions.py, series has not been in there for a while.

[dimaqq]

I'm confirming the above.

The series= kwarg did not work for quite a while.

It has disappeared between 3.0.2 and 3.0.3:

3.0.2...3.0.3#diff-28797347270467fe3dcb301f7927c3b5eae6bce5732e7c59aa69bc10cc658845

What folks were getting was the default that given Juju model deployed on.

I'm not perfectly clear, but I think this can be worked around by either of:

juju model-config default-base=ubuntu@24.04
juju model-config default-series=noble

There's always the alternative to shell out to juju cli to create machines for testing.

P.S. I'm working on general series to base transition in #1182 but that's still going to take a while.

[SimonRichardson]

@dimaqq Is correct, although that's less than ideal.

[gboutry]

Thanks for your input, I'll switch add-machine calls with juju cli calls instead for the moment.