haproxy.cfg

global
        log /dev/log    local0
        log /dev/log    local1 notice
        chroot /var/lib/haproxy
        user haproxy
        group haproxy
        daemon

defaults
        log     global
        mode    http
        option  httplog
        option  dontlognull
        contimeout 5000
        clitimeout 50000
        srvtimeout 50000
        errorfile 400 /etc/haproxy/errors/400.http
        errorfile 403 /etc/haproxy/errors/403.http
        errorfile 408 /etc/haproxy/errors/408.http
        errorfile 500 /etc/haproxy/errors/500.http
        errorfile 502 /etc/haproxy/errors/502.http
        errorfile 503 /etc/haproxy/errors/503.http
        errorfile 504 /etc/haproxy/errors/504.http



frontend http-in
        bind 0.0.0.0:80
        acl xyz hdr(host) -i xyz.blah.com
        acl abc hdr(host) -i abc.blah.com
        acl default hdr_end(host) -i .blah.com
        
        ## figure out which one to use
        use_backend xyz_cluster if xyz
        use_backend abc_cluster if abc
        use_backend direct_forward if default
        
backend xyz_cluster
        option forwardfor
        server node1 10.1.1.12:8080

# sends "abc.blah.com"
backend abc_cluster
        option forwardfor
        server node1 10.1.1.11:8080
        
# forward to actual destination
backend direct_forward
        option httpclose
        option http_proxy

listen  stats   :9000
        mode  http
        stats enable
        stats hide-version
        stats realm Haproxy\ Statistics
        stats uri  /stats
        stats auth test:test123