Can I use subdomains with my Heroku subdomain?

Question

I have a node app which uses vhost to manage subdomains. So, on my localhost I have:

main.localhost
admin.localhost
api.localhost

In production I have:

main.example.com
admin.example.com
api.example.com

I have a staging system on Heroku too.

so what I want to be able to do is:

main.example.herokuapp.com
admin.example.herokuapp.com
api.example.herokuapp.com

That doesn't seem to work. Is there a way of achieving it, or do I need to create a separate domain and point my nameservers there?

Answer 1

Sure this is possible. But you'll need to do this via your main domain, since it appears Heroku doesn't support wildcard subdomains on the herokuapp.com domain. ( How to create a subsubdomain for an app on heroku: (eg sub.myapp.herokuapp.com) )

First, set a CNAME record for *.staging.example.com to point to example.herokuapp.com

Then tell Heroku to route your domain properly:

$ heroku domains:add *.staging.example.com