HAProxy
#
# Ref: http://haproxy.1wt.eu/download/1.2/doc/haproxy-en.txt
#

global
        maxconn         32768
        user            nobody
        group           nobody
        daemon
        nbproc          8

listen blog-balancer
        bind            1.2.3.4:80
        mode            http
        balance         roundrobin
        maxconn         32768
        clitimeout      60000
        srvtimeout      60000
        contimeout      5000
        retries         3
        server          blog1 192.168.1.1:80 weight 3 check
        server          blog2 192.168.1.2:80 weight 3 check
        option          httpchk GET /robots.txt
        option          forwardfor
        option          httpclose
        redispatch

listen www-balancer
        bind            1.2.3.5:80
        mode            http
        balance         roundrobin
        maxconn         32768
        clitimeout      60000
        srvtimeout      60000
        contimeout      5000
        retries         3
        server          www1 192.168.1.3:80 weight 3 check
        server          www2 192.168.1.4:80 weight 3 check
        option          httpchk GET /robots.txt
        option          forwardfor
        option          httpclose
        option          redispatch