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I have a multi-tenant app on Heroku where each tenant has a portal (micro-site) that lives in a sub-directory (e.g. http://www.example.com/portals/foo-bar). My domain is hosted by GoDaddy and I want each tenant to be able to create a subdomain on their site for their portal to live in. I'm trying to create my own subdomain to test the process, but I can't figure out how to link a subdomain to a subdirectory on GoDaddy. I would presume that the process is pretty similar across domain registrars, but I'm not sure.

If I try creating an A record or a CNAME, it will only accept an IP address. I could create a simple redirect, but I want my user to stay on the subdomain as they interact with the portal, rather than simply be redirected from http://portal.foo-bar.com to http://www.example.com/portals/foo-bar.

Is this possible, and if so, how?

  • Address records point to IP addresses. It is not possible to do what you want in the DNS alone. Use your web server for this. – Michael Hampton Jul 30 '15 at 18:15
  • we miss the detail of what web server you use, urlrewrite would do what you need in iis – yagmoth555 Jul 30 '15 at 18:17
  • My site uses WEBrick (will be migrating to Unicorn or Puma soon), but my client's will be the ones setting up subdomains on their site to house their portal, and I don't know what servers they run. I have just a few clients right now, but that could soon increase to a few dozen. – Daniel Bonnell Jul 30 '15 at 19:23
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I think you would need to create subdomain in GoDaddy control panel for each domain and specify subdirectory for this subdomain and you will also need CNAME record in your DNS.

  • This meets most of my requirements so I checked it as the answer. The only problem I have with this solution is that using the redirect with masking option limits me to using a static page title for every page on a portal. I wonder if there is a way around that somehow using Javascript. I also need to allow cross-origin framing, although I'm less concerned with that, since I can limit it to certain known URLs to mitigate any security concerns. – Daniel Bonnell Jul 30 '15 at 19:27

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