Force URL pattern to specific balancer member in apache - apache

Question

I have a load balancer in apache with currently only two members. I want the URL's starting with "admin" to be mapped to a specific instance (http://localhost:16666/) because the admin site needs access to files on the CDN which is also in this machine. I could handle this by mounting this folder to the other server, or implementing a separate service doing this, but that's the last thing I want now. I was about to create a new proxypass rule to map these to this member rather than the balancer, but it simply ignores it.
The important part of my vhost config:
<Location /balancer-manager>
SetHandler balancer-manager
</Location>
<Proxy balancer://videoportal>
BalancerMember http://localhost:16666
BalancerMember http://example.com:16666
Require all granted
ProxySet lbmethod=byrequests
</Proxy>
<Proxy *>
Order deny,allow
Allow from all
</Proxy>
ErrorLog /var/log/apache2/videoportal-error.log
ProxyPass /balancer-manager !
ProxyPass "/admin" "http://localhost:16666/admin"
ProxyPassReverse "/admin" "http://localhost:16666/admin"
ProxyPass / balancer://videoportal/
ProxyPassReverse / balancer://videoportal/
ProxyRequests Off
Any advice what am I doing wrong?

Answer 1

First you are mixing apache 2.2 and apache 2.4 config
In apache 2.2 use
Order deny,allow
Allow from all
//Your apache config//
<Proxy *>
Order deny,allow
Allow from all
</Proxy>
In apache 2.4
Require all granted
//Your apache config//
<Proxy balancer://videoportal>
...
Require all granted
ProxySet lbmethod=byrequests
</Proxy>
Second try put the /admin before the balancer definition
...
SetHandler balancer-manager
</Location>
ProxyPass "/admin" "http://localhost:16666/admin"
ProxyPassReverse "/admin" "http://localhost:16666/admin"
<Proxy balancer://videoportal>
BalancerMember http://localhost:16666
...

Answer 2

I figured out what was the problem.
I created a location rule for this and added a header to track if it's working:
<Location /balancer-manager>
SetHandler balancer-manager
</Location>
<Proxy balancer://videoportal>
BalancerMember http://localhost:16666
BalancerMember http://example.com:16666
Require all granted
ProxySet lbmethod=byrequests
</Proxy>
<Proxy *>
Require all granted
</Proxy>
ErrorLog /var/log/apache2/videoportal-error.log
ProxyPass /balancer-manager !
# This is the new part
<Location "/admin">
ProxyPass "http://localhost:16666/admin"
ProxyPassReverse "http://localhost:16666/admin"
Header set ADMIN "true"
</Location>
# end of new part
ProxyPass / balancer://videoportal/
ProxyPassReverse / balancer://videoportal/
ProxyRequests Off