http://10.0.0.1:8080/site1

http://10.0.0.1:8080/site2

ProxyPass /site1 http://10.0.0.1:8080/site1
ProxyPassReverse /site1 http://10.0.0.1:8080/site1

ProxyPass /site2 http://10.0.0.1:8080/site2
ProxyPassReverse /site2 http://10.0.0.1:8080/site2

ProxyPass /site3 http://10.0.0.2:8080/site3
ProxyPassReverse /site3 http://10.0.0.2:8080/site3

ProxyPass /site4 http://10.0.0.1:8080/site4
ProxyPassReverse /site4 http://10.0.0.1:8080/site4

RewriteEngine On
RewriteRule ^/(.*) http://10.0.0.1:8080/VirtualHostBase/https/%{SERVER_NAME}:443/site1/VirtualHostRoot/$1 [L,P]

<VirtualHost *:80>

    Redirect permanent / https://10.0.0.1/

</VirtualHost>

RewriteEngine On
    RewriteRule ^/site1(.*) http://10.0.0.1:8080/VirtualHostBase/https/{SERVER_NAME}:443/site1/VirtualHostRoot/$1 [L,P]
    RewriteRule ^/site2(.*) http://10.0.0.1:8080/VirtualHostBase/https/{SERVER_NAME}:443/site2/VirtualHostRoot/$1 [L,P]
    RewriteRule ^/site3(.*) http://10.0.0.2:8080/VirtualHostBase/https/{SERVER_NAME}:443/site3/VirtualHostRoot/$1 [L,P]
    RewriteRule ^/site4(.*) http://10.0.0.1:8080/VirtualHostBase/https/{SERVER_NAME}:443/site4/VirtualHostRoot/$1 [L,P]