I have a bunch of domains pointing to one IP address (I have a feeling this will be the main thing stopping this from working) and one of them I would like to point to a node.js server on port 80 instead of having to faff about with proxies in Apache.
I've already removed the virtualhost for *:80 in apache (it warns me of this every time I restart it).
When I ask node to listen to domain.one:80 though (just an example, not what I'm really using), it doesn't work - it tells me the address is in use even though there's no VirtualHost for domain.one:80.
I suspect it's to do with the fact that domain.one and domain.two both point to the same IP, right? If not, what the heck can I do? Thanks :)
Ports are directly tied to an IP address. Each IP address can only have one process listening to a given port. Since your domain names all resolve to the same IP address you cannot have a separate node process for each one listening on port 80.
If you wish to keep this scheme, you'll need to have each node server listen on a different port and configure reverse proxies in Apache as described here. You can also consider using nginx as it also has this capability (configured slightly differently).
Yes. You can specify a servername in the vhost. Then you can only specify an IP or * in the tag. Create a *:80 Vhost and add
<VirtualHost *:80>
ServerName domain.one
DocumentRoot /blah/blah
....
</VirtualHost>
to it. That will filter by the domain name.