将多个域名解析到同一WAN IP上的不同虚拟机

Question

I am running a couple of VMs on my LAN (using proxmox) and I have a single External IP. I have 2 domains and I have them setup to resolve to my External IP.

Question: I would like to do the following

1. point www.myfirstdomain.com to come VM1 at port 80
2. point www.mysecondomain.com to VM2 at port 80

I haven't been able to find a solution to this specific scenario. Any pointers will be great.

Answer 1

You'll need something that understands HTTP, ie something that operates at OSI Layer 7. The only way I know to do that is to have something like an HTTP load balancer in front of your VM's, then have your VM's on some sort of private (eg 192.168.1.0/24) IP space behind that load balancer (LB). The LB will then interpret the HTTP URL and direct HTTP sessions to the appropriate VM.

Personally, the way I do it is just run both URL's on a single Apache instance using VirtualHosts. It's actually pretty secure to do it that way, and it's the "time honored" way to run multiple Web sites on a single WAN IP address.