HAProxy Load Balancer,

1. HAProxy Load Balancer

10. HAProxy Status

11. Examples http://www.mobshare.in

12. listen webfarm 192.168.1.1:80 mode http balance roundrobin cookie SERVERID insert indirect option httpchk HEAD /index.html HTTP/1.0 server webA 192.168.1.11:80 cookie A check server webB 192.168.1.12:80 cookie B check port 81 inter 2000 server webC 192.168.1.13:80 cookie C check server webD 192.168.1.14:80 cookie D check server bkpA 192.168.1.15:80 cookie A check backup server bkpB 192.168.1.16:80 cookie B check backup http://www.mobshare.in

13. http://www.mobshare.in Updating... 503 Service Unavailable No server is available to handle this request.

17. Global Section Example global daemon quiet nbproc 2 pidfile /var/run/haproxy-private.pid user haproxy group public

18. Default Section Example defaults log global mode http option httplog option forwardfor

19. Listen Section Example listen webfarm 192.168.1.1:80 mode http balance roundrobin cookie SERVERID insert indirect option httpchk HEAD /index.html HTTP/1.0 server webA 192.168.1.11:80 cookie A check server webB 192.168.1.12:80 cookie B check server webC 192.168.1.13:80 cookie C check server webD 192.168.1.14:80 cookie D check

20. Frontend Section Example frontend myfrontend *:80 log global maxconn 25000 option forwardfor acl acl_example1 url_sub example1 acl acl_example2 url_sub example2 use_backend example1_farm if acl_example1 use_backend example2_farm if acl_example2 default_backend default_farm

21. Backend Sections Example backend example1_farm mode http balance roundrobin server server1 192.168.1.1:80 check server server2 192.168.1.2:80 check backend example2_farm mode http balance roundrobin server server3 10.0.0.3:80 check server server4 10.0.0.4:80 check backend default_farm mode http balance roundrobin server server5 192.168.1.5:80 check server server6 192.168.1.6:80 check