Hi Baptiste, Thanks for the answer, it does help!
There have been discussions on the list about maintaining a connection pool with backend servers for the purposes of keep-alive, are there any plans for this in the near future? If not, can you recommend a way to handle such behaviour outside of haproxy? Thanks. On 22 March 2016 at 20:44, Baptiste <bed...@gmail.com> wrote: > On Tue, Mar 22, 2016 at 2:17 PM, Craig McLure <cr...@mclure.eu> wrote: > > Hi, > > > > I'm hoping to experiment with enabling keep-alive on my service, but the > > documentation isn't entirely clear for my use case, the general > > implementation is as follows: > > > > 1) A HTTP request comes in > > 2) A LUA script grabs the request body, does some analysis on it, and > > injects a Cookie: header into the request > > 3) The request goes to a backend, where the cookie is used to determine > the > > server the request should be dispatched too. > > > > This behaviour seems to work fine with the http-server-close or httpclose > > options, but I'm not entirely sure what would happen in a keep-alive > session > > when the backend server switches. I've set http-reuse to 'safe' but when > > the second request goes to a different backend server to the first, what > > happens to the original socket on the first server? Will it be reused by > > other connections or does it just get dropped in a 1:1 mapping style? > Given > > that it's rare that two subsequent requests on a single connection will > > arrive at the same server, is it even worth having keep-alive support on > the > > backends? > > > > Hopefully you guys can help. > > > > Thanks! > > Hi Craig, > > We miss the backend configuration and how you perform this persistence > to be able to deliver you the best support. > As far as I can tell, the persistence will have precedence over > keep-alive connections, if that helps. So Imagine a client which did a > first request which has been routed to server 1 where the connection > is now established, a second request comes from this same client and > your lua script sets a cookie to point it to server 2, then HAProxy > will close the first connection and establish a new one on the new > server. > > Baptiste >
