unit from docker and minimum python app: how to setup

[TAlonglong]

Looking into unit for a python app use case.

I start with a minimum container using docker like this
docker run -d --name unit --mount type=bind,src="$(pwd)",dst=/www/ -p 8080:8000 unit:1.33.0-python3.11

unit looks happy with some logs from the container:

/usr/local/bin/docker-entrypoint.sh: /docker-entrypoint.d/ is empty, creating 'welcome' configuration...
/usr/local/bin/docker-entrypoint.sh: OK: HTTP response status code is '200'
 }success": "Reconfiguration done."
/usr/local/bin/docker-entrypoint.sh: Stopping Unit daemon after initial configuration...
2024/10/24 11:39:26 [notice] 10#10 process 14 exited with code 0
2024/10/24 11:39:26 [notice] 10#10 process 15 exited with code 0

/usr/local/bin/docker-entrypoint.sh: Unit initial configuration complete; ready for start up...

2024/10/24 11:39:26 [info] 1#1 unit 1.33.0 started
2024/10/24 11:39:26 [info] 29#29 discovery started
2024/10/24 11:39:26 [notice] 29#29 module: python 3.11.10 "/usr/lib/unit/modules/python3.unit.so"
2024/10/24 11:39:26 [info] 1#1 controller started
2024/10/24 11:39:26 [notice] 1#1 process 10 exited with code 0
2024/10/24 11:39:26 [notice] 1#1 process 29 exited with code 0
2024/10/24 11:39:26 [info] 31#31 router started
2024/10/24 11:39:26 [info] 31#31 OpenSSL 3.0.14 4 Jun 2024, 300000e0

Next step is to add a config with a minimum python app described in docs https://unit.nginx.org/howto/samples/#python
with app looking like this inside the container:

docker exec -ti unit /bin/bash
root@12f8a916f93d:/# cat /www/wsgi.py 
def application(environ, start_response):
    start_response("200 OK", [("Content-Type", "text/plain")])
    return (b"Hello, Python on Unit!")

and config:

docker exec -ti unit /bin/bash
root@12f8a916f93d:/# cat www/config.json-old 
{
  "listeners": {
    "*:8000": {
      // Point listener to new application
      "pass": "applications/python"
    }
  },

  // Add an application definition
  "applications": {
    "python": {
        "type": "python",
        "path": "/www/",
        "module": "wsgi"
    }
  }
}

However restarting with this container

sudo docker run -d --name unit --mount type=bind,src="$(pwd)",dst=/docker-entrypoint.d/ --mount type=bind,src="$(pwd)",dst=/www/ -p 8080:8000 unit:1.33.0-python3.11

new config gives me:

/usr/local/bin/docker-entrypoint.sh: Applying configuration /docker-entrypoint.d/config.json
2024/10/24 11:51:42 [info] 22#22 "python" prototype started
2024/10/24 11:51:42 [info] 23#23 "python" application started
2024/10/24 11:51:42 [alert] 23#23 Python failed to import module "wsgi"
ModuleNotFoundError: No module named 'wsgi'
2024/10/24 11:51:42 [notice] 22#22 app process 23 exited with code 1
2024/10/24 11:51:42 [warn] 15#15 failed to start application "python"
2024/10/24 11:51:42 [alert] 15#15 failed to apply new conf
2024/10/24 11:51:42 [notice] 10#10 process 22 exited with code 0
/usr/local/bin/docker-entrypoint.sh: Error: HTTP response status code is '500'
 }error": "Failed to apply new configuration."

If I look into the container, start python and try to import the wsgi, it works fine.

So it is something fundamentally I'm not understanding here.

Any idea what I'm not getting right here?

[TAlonglong]

So for reference I split the config and the app in two different directories, mounting them separately and now its working.