Multi-Domain setup in one app

[ekevu123]

Using Phoenix Elixir, I want to build one monorepo app that hosts mini-apps with shared code base that should be reachable under different domains.

I have set up my reverse proxy and tested it. On Cloudron, I have set one app as the main domain and the other one as alias. In the cloudron manifest, I have set

    "multiDomain": true,

To debug whether the issue is with Cloudron or my proxy setup, I have run this in the app container:

curl -v -H "Host: Domain1" http://localhost:4000/

and respectively with the other domain. 4000 is the port of the proxy inside my app. Both responses resolve the correct site, so I am assuming that my proxy setup works.

Yet the issue is that Cloudron resolves only the main domain. When I access domain2, I am forwarded to domain1 and my app's logs indicate someone had tried to access domain1.

How can I debug this?

[joseph]

you can inspect the generated reverse proxy config in /etc/nginx/applications/appid/ .

[robi]

How did you define domain2 in the manifest?

[ekevu123]

@robi said in Multi-Domain setup in one app:

How did you define domain2 in the manifest?

I don't think this is possible based on the manifest documentation. I can only set multidomain to true, and then define an alias later.

@joseph said in Multi-Domain setup in one app:

you can inspect the generated reverse proxy config in /etc/nginx/applications/appid/ .

Thank you, I am working through it right now!

[ekevu123]

Okay, I found the issue. The problem was that for testing purposes, domain2 was a subdomain of domain1. So, all calls made to domain2 where resolved to domain1 - however, not by my app, but by cloudron. When I connected a top-level domain to Cloudron and changed it in my app's settings, the app resolved correctly both domains.

However, I wonder if that should be the case. Granted, if you wanted to use a subdomain, you probably wouldn't need the multi-domain setup, but at least for testing, I would have assumed this would work.

I believe the issue is that Cloudron didn't preserver the original host.

[joseph]

@ekevu123 said in Multi-Domain setup in one app:

So, all calls made to domain2 where resolved to domain1 - however, not by my app, but by cloudron

Do you mean, domain1 is like app.example.com and domain2 is like test.app.example.com ? (where example.com was added in the Domains UI ?)

by resolved, do you mean DNS resolution?

[ekevu123]

@joseph said in Multi-Domain setup in one app:

Do you mean, domain1 is like app.example.com and domain2 is like test.app.example.com ? (where example.com was added in the Domains UI ?)

Yes, domain 1 was example.com and domain 2 was test.example.com. When I changed app 2 and connected anotherexample.com, it worked, so the issue was with using a subdomain compared to using a different domain - in my opinion, because Cloudron cut this information, so my proxy didn't have a chance to get this right.

@joseph said in Multi-Domain setup in one app:

by resolved, do you mean DNS resolution?

0

I am referring to the end result, so any traffic to domain2 (subdomain) went to domain1 for whatever reason.

[ekevu123]

@joseph Did you have a chance to check this? I understand that the issue isn't a priority, but if the issue really is cloudron-related according to the above, then it would be helpful if this could be fixed eventually.

[joseph]

I can't seem to reproduce it atleast. I setup an app with domain and subdomain (using minio app, which has same setup as yours) and it seems to work . If you can reproduce it with say minio , maybe that will help us narrow it down. Also, which DNS provider are you using (just to rule out any wildcard/manul DNS setup issues) ?

[ekevu123]

Thank you for checking, I really appreciate it! I had one domain with HostEurope and one with Porkbun.
I will look into Minio, but since that's a completely new codebase, and I might need to extract additional logs from that to understand the difference, I might not be able to do that.