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Project Description

Source code: https://github.com/juju/python-libjuju

Bug reports: https://github.com/juju/python-libjuju/issues

Documentation: https://pythonhosted.org/juju/

Requirements

  • Python 3.5+
  • Juju 2.0+

Design Notes

  • Asynchronous - uses asyncio and async/await features of python 3.5
  • Websocket-level bindings are programmatically generated (indirectly) from the Juju golang code, ensuring full api coverage
  • Provides an OO layer which encapsulates much of the websocket api and provides familiar nouns and verbs (e.g. Model.deploy(), Application.add_unit(), etc.)

Installation

pip install juju

Quickstart

Here’s a simple example that shows basic usage of the library. The example connects to the currently active Juju model, deploys a single unit of the ubuntu charm, then exits.

More examples can be found in the examples/ directory of the source tree, and in the documentation.

#!/usr/bin/python3.5

import asyncio
import logging

from juju import loop
from juju.model import Model


async def deploy():
    # Create a Model instance. We need to connect our Model to a Juju api
    # server before we can use it.
    model = Model()

    # Connect to the currently active Juju model
    await model.connect_current()

    # Deploy a single unit of the ubuntu charm, using revision 0 from the
    # stable channel of the Charm Store.
    ubuntu_app = await model.deploy(
        'ubuntu-0',
        application_name='ubuntu',
        series='xenial',
        channel='stable',
    )

    # Disconnect from the api server and cleanup.
    model.disconnect()


def main():
    # Set logging level to debug so we can see verbose output from the
    # juju library.
    logging.basicConfig(level=logging.DEBUG)

    # Quiet logging from the websocket library. If you want to see
    # everything sent over the wire, set this to DEBUG.
    ws_logger = logging.getLogger('websockets.protocol')
    ws_logger.setLevel(logging.INFO)

    # Run the deploy coroutine in an asyncio event loop, using a helper
    # that abstracts loop creation and teardown.
    loop.run(deploy())


if __name__ == '__main__':
    main()

Change Log

0.4.2

Wed May 10 2017

  • Support (and prefer) per-controller macaroon files (#125)

0.4.1

Wed Apr 27 2017

  • Remove VERSION_MAP and rely on facade list from controller (#118)
  • Refactor connection task management to avoid cancels (#117)
  • Refactored login code to better handle redirects (#116)

0.4.0

Wed Apr 19 2017

  • Feature/api version support (#109)
  • Expanding controller.py with basic user functions, get_models and destroy (#89)
  • Added Monitor class to Connection. (#105)
  • Support placement lists (#103)
  • Include resources from store when deploying (#102)
  • Allow underscore to dash translation when accessing model attributes (#101)
  • Added controller to ssh fix. (#100)
  • Regen schema to pick up missing APIs
  • Improve error handling
  • Fix issue where we do not check to make sure that we are receiving the correct response.
  • Retry calls to charmstore and increase timeout to 5s
  • Make connect_model and deploy a bit more friendly
  • Fix model name not including user
  • Implement Model.get_status
  • Add integration tests.

0.3.0

Mon Feb 27 2017

  • Fix docstrings for placement directives.
  • Implement Model.add_machine()
  • Bug fix - “to” parameter to Model.deploy() was broken
  • Add docs and examples for adding machines and containers and deploying charms to them.
  • Make Machine.destroy() block the current coroutine, returning only after the machine is actually removed from the remote model. This is more consistent with the way the other apis work (e.g. Model.deploy(), Application.add_unit(), etc).
  • Raise NotImplementedError in all unimplemented method stubs instead of silently passing.

0.2.0

Thu Feb 16 2017

  • Add default ssh key to newly created model.
  • Add loop helpers and simplify examples/deploy.py
  • Add support for deploying local charms, and bundles containing local charm paths.
  • Add ability to get cloud name for controller.
  • Bug fix - fix wrong api used in Model.destroy_unit()
  • Add error detection in bundle deploy.

0.1.2

Thu Dec 22 2016

  • Bug fix - Include docs in package

0.1.1

Thu Dec 22 2016

  • Bug fix - Include VERSION file in package

0.1.0

Wed Dec 21 2016

  • Initial Release
Release History

Release History

0.4.2

This version

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0.4.1

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0.4.0

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0.3.0

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0.2.0

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0.1.2

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0.1.1

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0.1.0

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