How to properly use VirtualHost and mod_proxy together for different incoming domain names and internal ports?

Question

I am trying to setup httpd.conf properly but regardless of the sub-domain/domain combo below, they all resolve to the same internal URL.

<Proxy *>
  Order Allow,Deny
  Allow from all
</Proxy>

ProxyRequests       Off


<VirtualHost *:80>
    Servername      jira.firstfactoryinc.com
    ProxyPreserveHost   On
    ProxyPass       /   http://localhost:8082/
    ProxyPassReverse    /   http://localhost:8082/
</VirtualHost>

<VirtualHost *:80>
    Servername      jira.submitpatientforms.com
    ProxyPreserveHost   On
    ProxyPass       /   http://localhost:8081/
    ProxyPassReverse    /   http://localhost:8081/
</VirtualHost>

<VirtualHost *:80>
    Servername      mddev-jira.firstfactoryinc.com
    ProxyPreserveHost   On
    ProxyPass       /   http://localhost:8080/
    ProxyPassReverse    /   http://localhost:8080/
</VirtualHost>

What am I doing wrong?

Answer 1

You'll need a NameVirtualHost directive that matches your <VirtualHost> definitions, or else the first <VirtualHost> block to load will be used for all requests on that port (this matches with what you're seeing, correct?).

In the case of the config above:

NameVirtualHost *:80

Outside of a VirtualHost block. Alongside your Listen directive is a good place for it.

Answer 2

You may have to add something like this within each VirtualHost, I did:

<Proxy *>
  Order Allow,Deny
  Allow from all
</Proxy>

Obviously that can be modified to suit your security needs.

You may also want to add:

ProxyRequests Off

It is supposed to be the default, but depending on your Apache version and mod_proxy version something could be acting up.