Hi Thomas, thanks for the suggestion! I'm hoping for a built-in solution with the existing stats data. Would scur=0 on the server stats be an accurate test? I'm dubious because I tested disabling http-server-close and the active server in question still shows scur of 0 most of the time; the requests are for a web service that typically responds in <100ms, but it's still handling 500-1000 requests per minute, so I would expect to see more sessions.
Also, I just pulled stats for the server and scur for the frontend is 73 but total for all the backends is 1. Why is that if http-keep-alive is set? On Wed, Oct 29, 2014 at 6:41 PM, Thomas Heil <[email protected]> wrote: > Hi, > > On 29.10.2014 23:09, Tom Keyser wrote: > > Along this same vein... > > We're using HAProxy to execute seamless mid-day deployments of > high-volume critical services. The http-server-close option is set. The > backend of an example service is like so: > > server svr2 192.168.1.19:80 check > server svr2_staging 192.168.1.19:8080 disabled check > > Our deployment system is configured to copy new binaries to the > svr2_staging server, then use the stats socket to change the svr2_staging > state to "ready" and the svr2 state to "drain". My question is how can I be > sure all existing sessions to the svr2 server are closed before I start > copying binaries to it? > > One idea that comes into my mind is to use a stick table and and poll as > long as there are server_id that belongs to a server > that should be upgraded. > The worse case would be polling as long as the expire timeout for the > stick-table. > > > On Wed, Oct 29, 2014 at 12:06 PM, Baptiste <[email protected]> wrote: > >> On Fri, Oct 24, 2014 at 4:37 PM, Ian Cooke <[email protected]> wrote: >> > Hi, >> > >> > Can haproxy change the backend for an existing session? I have a >> stateless >> > client/server and I thought 'redispatch' did what I want but it seems >> that's >> > only for the initial connection. What I'd like is for a client that's >> > already been connected to maintain the frontend's connection but change >> the >> > session's backend server if the one it's connected to goes down. >> > >> > Thanks, >> > Ian >> >> Hi, >> >> maybe http-server-close is the option you're looking for. >> >> Baptiste >> >> > > > -- > > cheers, > thomas > > --
