haproxy: discard cookie insert, balance use roundrobin instead of source ip
haproxy: discard cookie insert, balance use roundrobin instead of source
ip

for a persistent keep-alive http conn, haproxy already gurantees the
req/resp always goes to the same backend

funkygao/gafka,funkygao/gafka,funkygao/gafka,funkygao/gafka,funkygao/gafka