Web interface in docker container

[simoncozens]

I've got batpred set up in a docker container using this configuration:

  predbat:
    container_name: predbat
    image: nipar44/predbat_addon:latest
    restart: unless-stopped
    network_mode: host
    volumes:
      - /opt/hass/predbat-config:/config:rw
      - /etc/localtime:/etc/localtime:ro

Everything is working except the web interface. I thought it was because starting the HA web socket failed with this error:

2025-03-30 13:08:39.991959: Warn: Failed to decode response <Response [404]> from http://homeassistant.local:8123/addons/self/info

Because I'm using HA in docker, there's no addons, so that makes sense. Commenting out the raise line in

batpred/apps/predbat/predbat.py

Lines 1178 to 1182 in 78171e1

	except ValueError as e:
	self.log("Error: Exception raised {}".format(e))
	self.log("Error: " + traceback.format_exc())
	self.record_status("Error: Exception raised {}".format(e), debug=traceback.format_exc())
	raise e

allows it to get a little further:

2025-03-30 13:08:39.993358: Creating task: <coroutine object WebInterface.start at 0x7f81813010>
2025-03-30 13:08:39.993921: Info: Start socket for url http://homeassistant.local:8123/api/websocket
Web interface started
2025-03-30 13:08:40.012179: Info: Web Socket active

But nothing is actually bound:

root@homeassistant:/opt/hass/predbat-config# telnet homeassistant.local 5052
Trying 172.17.0.1...
telnet: Unable to connect to remote host: Connection refused
root@homeassistant:/opt/hass/predbat-config# lsof -p 53117 | grep LISTEN
root@homeassistant:/opt/hass/predbat-config#

I'm pretty sure it's a problem my end (or maybe nobody's tried web interface + Docker container), but I'm totally confused about what it might be.

[simoncozens]

Argh, it's definitely a me problem. telnet localhost 5052 in the docker shell works fine. So it's problem with my Docker forwarding, not batpred.

[simoncozens]

Argh. docker-compose start versus docker-compose up. Sorry about the noise but hopefully it will be useful if anyone else hits this in the future.