Controllers =========== A Juju controller provides websocket endpoints for itself and each of its models. In order to do anything useful, the juju lib must connect to one of these endpoints. Connecting to the controller endpoint is useful if you want to programmatically create a new model. If the model you want to use already exists, you can connect directly to it (see :doc:`model`). For api docs, see :class:`juju.controller.Controller`. Connecting to the Current Controller ------------------------------------ Connect to the currently active Juju controller (the one returned by `juju switch`). This only works if you have the Juju CLI client installed. .. code:: python from juju.controller import Controller controller = Controller() await controller.connect_current() Connecting to a Named Controller -------------------------------- Connect to a controller by name. .. code:: python from juju.controller import Controller controller = Controller() await controller.connect_controller('mycontroller') Connecting with Username/Password Authentication ------------------------------------------------ The most flexible, but also most verbose, way to connect is using the API endpoint url and credentials directly. This method does NOT require the Juju CLI client to be installed. .. code:: python from juju.controller import Controller controller = Controller() controller_endpoint = '10.0.4.171:17070' username = 'admin' password = 'f53f08cfc32a2e257fe5393271d89d62' # Left out for brevity, but if you have a cert string you should pass it in. # You can copy the cert from the output of The `juju show-controller` # command. cacert = None await controller.connect( controller_endpoint, username, password, cacert, ) Connecting with Macaroon Authentication --------------------------------------- To connect to a shared controller, you'll need to use macaroon authentication. The simplest example is shown below, and uses already-discharged macaroons from the local filesystem. This will work if you have the Juju CLI installed. .. note:: The library does not yet contain support for fetching and discharging macaroons. Until it does, if you want to use macaroon auth, you'll need to supply already-discharged macaroons yourself. .. code:: python from juju.client.connection import get_macaroons() from juju.controller import Controller controller = Controller() controller_endpoint = '10.0.4.171:17070' username = None password = None cacert = None macaroons = get_macaroons() await controller.connect( controller_endpoint, username, password, cacert, macaroons, )