AttributeError: module 'asyncio' has no attribute 'create_task'

[Chris Johnston]

When running with the fix for LP:#1927145 on bionic I am seeing:

[2021-05-18 01:09:55 +0000] [8610] [ERROR] Exception in gunicorn worker
Traceback (most recent call last):
  File "/var/lib/juju/agents/unit-kubernetes-master-1/.venv/lib/python3.6/site-packages/aiohttp/worker.py", line 57, in run
    self.loop.run_until_complete(self._task)
  File "/usr/lib/python3.6/asyncio/base_events.py", line 484, in run_until_complete
    return future.result()
  File "/var/lib/juju/agents/unit-kubernetes-master-1/.venv/lib/python3.6/site-packages/aiohttp/worker.py", line 84, in _run
    await runner.setup()
  File "/var/lib/juju/agents/unit-kubernetes-master-1/.venv/lib/python3.6/site-packages/aiohttp/web_runner.py", line 275, in setup
    self._server = await self._make_server()
  File "/var/lib/juju/agents/unit-kubernetes-master-1/.venv/lib/python3.6/site-packages/aiohttp/web_runner.py", line 375, in _make_server
    await self._app.startup()
  File "/var/lib/juju/agents/unit-kubernetes-master-1/.venv/lib/python3.6/site-packages/aiohttp/web_app.py", line 416, in startup
    await self.on_startup.send(self)
  File "/var/lib/juju/agents/unit-kubernetes-master-1/.venv/lib/python3.6/site-packages/aiohttp/signals.py", line 34, in send
    await receiver(*args, **kwargs) # type: ignore
  File "/root/cdk/auth-webhook/auth-webhook.py", line 401, in startup
    app['secrets_task'] = asyncio.create_task(_task())
AttributeError: module 'asyncio' has no attribute 'create_task'

If I change create_task to ensure_future things seem to work:
https://python.tutorialink.com/attributeerror-module-asyncio-has-no-attribute-create_task/

[George Kraft (cynerva)]

We marked LP:1927145 as critical, so I'm marking this one as critical too.

[Cory Johns (johnsca)]

https://github.com/charmed-kubernetes/charm-kubernetes-master/pull/160

[Cory Johns (johnsca)]

This was backported to stable in https://github.com/charmed-kubernetes/charm-kubernetes-master/commit/ae9bf6f8f2fbfaf3de7d748bfd9a166a7e2fc1fb

[Cory Johns (johnsca)]

This was released on May 28th with bundle rev 679 / kubernetes-master rev 1008.