Would it be possible to use the addon on HA as a cloudflare tunnel for docker containers?

[quartzbear]

Hi

I have had trouble installing cloudflare on docker, but managed installing it on HA much more easily.
Would it be possible to use the addon to serve as the tunnel for existing docker containers?
I thought the idea is similar to the Adguard Home addon.

Is it possible or am I totally wrong here?

[brenner-tobias]

You can add any additional_host that you like. So for example if your docker container is running a http service, you can simply add this service and the IP in the additional_hosts array and have the proxy route your traffic. Please let me know if this makes sense and if you have any questions.

[quartzbear]

Thanks for your answer.
I seem to be doing something wrong. No matter what I put in, I get an error "Invalid list for option 'additional_hosts' in Cloudflared".
So, I have 2 more questions-
-Do docker containers use a http service by default or is it something I set up manually?

-Is the array supposed to look like this:
hostname: grafana.widgetcorp.tech
service: http://localhost:3000
Or just like this:
localhost:3000

[quartzbear]

Thank you for your detailed answers.
It still won't work with the other sites, for some reason. [Docker containers that I can access on other computers on the same network (audiobookshelf, podgrab) via the browser should be http servers, no?]
I'm getting this error now:
Failed to save add-on configuration, Missing option 'additional_hosts' in root in Cloudflared .

Edit: I'm entering in this format:
hostname: "web.site"
service: "http://192.xx.xx.xx:8080”

[elcajon]

Have you already tried to add the additional host without the quotation mark?

This is how it should work:

[quartzbear]

Ah thank you so much, i assumed it was supposed to be written like that, as a string.
When adding additional sites how does cloudflare know to create tunnels for all of them? At the webpage generated in the logs, I am supposed to authorize each site individually?

Btw (this wasn't causing the errors before), the add-on does not accept URLs with non-Latin characters, so the "latin translation" has to be put instead

[brenner-tobias]

Cloudflare does not create individual tunnels for all hosts, but routes multiple hosts through the same tunnel. All the domains should be part of the same site (so subdomains), if they are not, I am not sure if the authentication will be sufficient.
In case you are using multiple Sites, I suggest you switch to a remote managed tunnel, see description here.

Regarding the string: It is correct without the ". @elcajon maybe we should change the documentation accordingly, since I agree, this is misleading.