check-juju-version.py

#!/usr/bin/env python3

## This will loop through your controllers and output the model 
## version for each model on each controller in your system.

import json
from subprocess import (
    PIPE,
    run,
)


status_cmd = "juju status -m {}:{} --format=json"


res = run(['juju controllers --format=json'], shell=True, check=True,
        stdout=PIPE)
if res:
    controllers_json = res.stdout.decode()
else:
    print("juju controllers --format=json failed.")
    sys.exit(1)

controllers = json.loads(controllers_json)

for controller in controllers['controllers']:

    print("Controller: {}".format(controller))

    res = run(['juju models -c {} --format=json'.format(controller)],
            shell=True, check=True, stdout=PIPE)
    if res:
        models_json = res.stdout.decode()
    else:
        print("juju models for the controller failed.")
        sys.exit(1)

    models = json.loads(models_json)
    for model in models['models']:
        if 'external' in model['owner']:
            model_name = "{}/{}".format(model['owner'], model['name'])
        else:
            model_name = model['name']

        res = run([status_cmd.format(controller, model_name)],
                shell=True, check=True, stdout=PIPE)

        if res:
            status_json = json.loads(res.stdout.decode())
        else:
            print("juju status for the model failed.")
            sys.exit(1)

        print("  Model {} - {}".format(model['name'], status_json['model']['version']))