# Pastebin zczps5gf
Hi there,
I have a question:
 according to the Rabbitmq service is behind the Haproxy service, why do you use transsport_url in nova.conf like this: 

`rabbit://user:pass@IP1:5671,user:pass@IP2:5671,user:pass@IP3:5671/user?ssl=1&ssl_version=TLSv1_2&ssl_ca_file=`

and why don't use of Haproxy VIP address like this 

`rabbit://user:pass@VIP:5671/user?ssl=1&ssl_version=TLSv1_2&ssl_ca_file=`