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If you like, I can send you an example of the Caddyfiles, that I’m using (I used the import directive to split every service into its own Caddyfiles, you could just copy and paste everything in the same file). It will take a few hours until I get home, though.

But basically you can just put every subdomain and it’s target in a separate block and the add some things globally (e.g. passing the original IP, switching off the admin API of Caddy,…)

Something like this should work:


admin off 

servers {
		client_ip_headers X-Forwarded-For X-Real-IP
}

app.example.com {
    reverse_proxy 127.0.0.1:8080
}

app2.example.com {
    reverse_proxy 127.0.0.1:8081
}

api.example.com {
    reverse_proxy 127.0.0.1:8080
    header {
        Access-Control-Allow-Methods "GET, OPTIONS"
        Access-Control-Allow-Origin "*"
    }
}

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Profligate_parasite@lemmy.world ⁨1⁩ ⁨day⁩ ago
Thanks very much, this is really helpful… one thing I note is that I don’t know what “api.example.com” is … is that necessary to make this work or is it just an option? I haven’t mucked with API of Caddy at all…do I need to?

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- elvith@feddit.org ⁨1⁩ ⁨day⁩ ago
  No, that’s just another hypothetical app that you’re using a reverse proxy for. I just included it to show how you can also set settings for a single subdomain/reverse proxy entry that isn’t used globally on all domains that get served. I used a hypothetical REST API that needs a CORS Header that other apps don’t need (or maybe serve themselves).
  
  admin off disables Caddy’s admin interface (which shouldn’t be public and if you’re using config files this usually isn’t needed. So just a bit of gardening)
  
  servers sets some general server options.
  
  and then I just inserted several blocks that each define a reverse proxy to a different app / backend to show that you can just dump them all in a single Caddyfile. And the last example to show that you can set specific settings only for a specific subdomain instead of globally. As I set headers mostly used by REST APIs, I just called that api.example.com instead of app3.example.com.
  
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- Profligate_parasite@lemmy.world ⁨1⁩ ⁨day⁩ ago
  I’ve tried this caddyfile version and one above, for both, I get “Problem loading page. Secure connection failed. Internal error.” Oddly, I get the ‘welcome to caddy’ page directly at my IP but at my sub domain I get the error.
  
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