Here's my basic setup:

Router forwarding port's 80 and 443 to Ubuntu Server 14.04 running apache. Works great.

Running several virtual machines (QEMU/KVM) on Ubuntu server. VM's are in bridged mode so they have their own internal IP address.

I would like to redirect all traffic for subdomain to the VM's for handling.

Ex:

sub1.example.com -> VM1

sub2.example.com -> VM2

sub3.example.com -> VM3

I would like this to forward ssl requests to the VM for handling.

Currently I'm getting redirect loops or ssl errors, regardless of what I try. I can get non-ssl to work, but I'm not sure how to setup the Ubuntu server to handle and forward requests for HTTP and HTTPS.

Edit:

Here are my current virtual hosts files:

<VirtualHost *:80>
    ServerName sub1.example.com
    ProxyPreserveHost On
    ProxyPass / http://192.168.1.78/
    ProxyPassReverse / http://192.168.1.78/
</VirtualHost>

<VirtualHost *:443>
    ServerName sub1.exmaple.com
    ProxyPreserveHost On    
    ProxyPass / http://192.168.1.78/
    ProxyPassReverse / http://192.168.1.78/
</VirtualHost>

I know this isn't correct, but not sure how to do it. The main server will receive request from http://sub1.example.com and https://sub1.example.com

Edit 2:

I forgot to mention that I have this working for non-ssl using this:

<VirtualHost *:80>
  ServerName zab.example.com # this forwards to my zabbix VM
  ProxyPreserveHost on
  ProxyPass / http://192.168.1.64/
  ProxyPassReverse / http://192.168.1.64/
</VirtualHost>

This takes incoming requests for zab.example.com and forwards them to my Zabbix VM at 192.168.1.64. So port 80 redirects to VM's are working well.

Thanks for any help!

Edit 3:

I'm still missing something (again, I'm a novice 🙂 )

Here are all my virtual hosts:

WAN -> 192.168.1.66 (Main Server)

<VirtualHost *:80>
   ServerName file.example.com
   redirect permanent / https://file.example.com/
</VirtualHost>

<VirtualHost *:443>
 ServerName file.example.com
 SSLEngine On
 SSLCertificateFile /home/js/Seafile/file_ws_ee.crt
 SSLCertificateKeyFile /home/js/Seafile/file.example.com.key
 SSLCertificateChainFile /home/js/Seafile/GeoTrustDVSSLCAG4.cer
 SSLProxyEngine On
 ProxyPreserveHost off
 ProxyRequests off
 ProxyPass / http://file.example.com/
 ProxyPassReverse / http://file.example.com/
</VirtualHost>

Internal VM 192.168.1.78 (running Seafile)

<VirtualHost *:80>
   ServerName file.example.com
   redirect permanent / https://file.example.com/
</VirtualHost>

<VirtualHost *:443>
  ServerName file.example.com
  DocumentRoot /var/www
  Alias /media  /home/js/Seafile/seafile-server-latest/seahub/media

  SSLEngine On
  SSLCertificateFile /home/js/Seafile/file_ws_ee.crt
  SSLCertificateKeyFile /home/js/Seafile/file.example.com.key
  SSLCertificateChainFile /home/js/Seafile/GeoTrustDVSSLCAG4.cer

  RewriteEngine On

    <Location /media>
        Require all granted
    </Location>

  #
  # seafile fileserver
  #
  ProxyPass /seafhttp http://127.0.0.1:8082
  ProxyPassReverse /seafhttp http://127.0.0.1:8082
  RewriteRule ^/seafhttp - [QSA,L]

  #
  # seahub
  #
  RewriteRule ^/(media.*)$ /$1 [QSA,L,PT]
  RewriteCond %{REQUEST_FILENAME} !-f
  RewriteRule ^(.*)$ /seahub.fcgi/$1 [QSA,L,E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]
</VirtualHost>

Running wget file.example.com results in:

HTTP request sent, awaiting response... 301 Moved Permanently
Location: https://file.example.com/ [following]
20 redirections exceeded.

Thoughts?