Understanding How Caddy Works with Multiple Subdomains as a Reverse Proxy

[matt.m]

Hi Everyone!

I am currently running Caddy through the Rocket.Chat Snap and I fail to understand how to get Caddy to handle multiple subdomains.

Currently, I have a chat subdomain for my Rocket.Chat instance. My Caddyfile looks like this:

https://chat.domainname.com
proxy / localhost:3000 {
websocket
transparent
}

Now, from what I understand, to add another domain to this, all I have to do is just add this block again with a modified subdomain and port number. Is this correct? What I have tried is this:

https://bitwarden.domainname.com
proxy / localhost:8181{
websocket
transparent
}

I am trying to get Bitwarden to be SSL verified under this one caddy install as well as my Rocket.Chat instance. When I add the block above to my Caddyfile underneath the Rocket.Chat one, the Rocket.Chat subdomain doesn’t load at all. I was wondering why this would be the case.

I have tried asking on the Rocket.Chat forums, however, there hasn’t been any response, so, I figured I would ask here in case someone had this issue in the past.

Thank you for your time.

[francislavoie]

To have multiple sites, you need to use curly brackets around the config for each site:

See here for an explanation: https://caddyserver.com/v1/docs/caddyfile#structure

https://chat.domainname.com {
    proxy / localhost:3000 {
        websocket
        transparent
    }
}

https://bitwarden.domainname.com {
    proxy / localhost:8181 {
        websocket
        transparent
    }
}

[matt.m]

Thank you so much for the help! This helped me get past the hurdle I was encountering. I’m not sure why I didn’t check my brackets in the Caddyfile…

Thank you so much!!