On Tue, Oct 10, 2017 at 11:25 PM, Ruben <[email protected]> wrote:
> I have some stateful chat servers (SockJS) running in docker swarm mode.
> When doing dig chat I get an unordered randomized list of servers for
> example:
>
> (every time the order is different)
> 10.0.0.12
> 10.0.0.10
> 10.0.0.11
>
> The chat is accessed by a chatName url parameter. Now I want to be able to
> run a chat-load-balancer service in docker with multiple replicas using the
> haproxy image.
>
> The problem is that docker always resolves to a randomized list when doing
> dig chat.
>
> I want to map the chatName param from the url to a fixed server which
> always have the same ip from the list of ips of dig chat. So the mapping of
> the url_param should not be based on the position of the server in the
> list, but solely on the ip of the server.
>
> So for example ?chatName=fun should always route to ip 10.0.0.12, no
> matter what.
>
> My current haproxy.cfg is:
>
> defaults
> mode http
> timeout client 5s
> timeout connect 5s
> timeout server 5s
>
> frontend frontend_chat
> bind :80
> mode http
> timeout client 120s
> option forwardfor
> option http-server-close
> option http-pretend-keepalive
> default_backend backend_chat
>
> backend backend_chat
> balance url_param chatName
> timeout server 120s
> server chat chat:80
>
> At the moment it seems that only the Commercial Subscribtion of Nginx can
> handle this kind of cases using the sticky route $variable ...; directive
> in the upstream module.
>
Maybe try:
http-request set-header Host 10.0.0.12 if { query -m beg -i chatName=fun }
