Python library for Juju
Project description
Source code: https://github.com/juju/python-libjuju
Bug reports: https://github.com/juju/python-libjuju/issues
Documentation: https://pythonlibjuju.readthedocs.io/en/latest/
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
pip3 install jujuQuickstart
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
import logging
import sys
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()
try:
# Deploy a single unit of the ubuntu charm, using the latest revision
# from the stable channel of the Charm Store.
ubuntu_app = await model.deploy(
'ubuntu',
application_name='ubuntu',
series='xenial',
channel='stable',
)
if '--wait' in sys.argv:
# optionally block until the application is ready
await model.block_until(lambda: ubuntu_app.status == 'active')
finally:
# Disconnect from the api server and cleanup.
await model.disconnect()
def main():
logging.basicConfig(level=logging.INFO)
# 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
0.7.3
Tuesday Feb 20 2018
Full macaroon bakery support (#206)
Fix regression with deploying local charm, add test case (#209)
Expose a machines series (#208)
Automated test runner fixes (#205)
0.7.2
Friday Feb 9 2018
Support deploying bundle YAML file directly (rather than just directory) (#202)
0.7.1
Monday Dec 18 2017
Fix missed renames of model_uuids (#197)
0.7.0
Fri Dec 15 2017
Fix race condition in adding relations (#192)
Fix race condition in connection monitor test (#183)
Fix example in README (#178)
Fix rare hang during Unit.run (#177)
Fix licensing quirks (#176)
Refactor model handling (#171)
Refactor users handling, add get_users (#170)
Upload credential to controller when adding model (#168)
Support ‘applications’ key in bundles (#165)
Improve handling of thread error handling for loop.run() (#169)
Fix encoding when using to_json() (#166)
Fix intermittent test failures (#167)
0.6.1
Fri Sept 29 2017
Fix failure when controller supports newer facade version (#145)
Fix test failures (#163)
Fix SSH key handling when adding a new model (#161)
Make Application.upgrade_charm upgrade resources (#158)
Expand integration tests to use stable/edge versions of juju (#155)
Move docs to ReadTheDocs (https://pythonlibjuju.readthedocs.io/en/latest/)
0.6.0
Thu June 29 2017
Implement scp functionality (#149)
Add Unit.public_address property (#153)
Adds support for getting/setting config on a model (#152)
0.5.3
Thu June 22 2017
Improve handling of closed connections (#148)
Configurable and larger max message size (#146)
0.5.2
Wed June 14 2017
Fix deploying non-stable channels and explicit revs (#144)
0.5.1
Tue June 13 2017
Update schema for Juju 2.3 alpha1 (#142)
Improve API doc navigation and coverage (#141)
Add type info to Model.add_machine docs (#138)
0.5.0
Thu June 8 2017
Add machine status properties (#133)
Add model context manager (#128)
Implement Application.upgrade_charm method (#132)
0.4.3
Thu June 1 2017
Accept new / unknown API fields gracefully (#131)
Add support for new agent-version field in ModelInfo (#131)
Replace pip with pip3 in install instructions (#129)
Strip local:-prefix from local charm urls (#121)
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
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