frontend http-in
    mode              http
    bind              FRONTENDIP:80

    default_backend   nginx_server_1

    acl nginx_1      hdr_end(host) -i www.xyz.com
    acl nginx_2      hdr_end(host) -i abc.xyz.com
    acl nginx_path   path_beg /abc/

    use_backend       nginx_server_1 if nginx_1 !nginx_path

backend nginx_server_1
    server nginx1 10.0.0.1:8080 maxconn 1000

backend nginx_server_2
    server nginx2 10.0.0.2:8080 maxconn 1000