Hi Anze, On Sat, Jul 24, 2010 at 03:10:21PM +0200, Anze wrote: > Hi all! > > I hope this is not too "newbie" question, but... is it possible to redirect > to > a specified backend whenever a predefined value is found in a cookie? (or at > least, when a predefined cookie is found at all?) I have read through the > docs > and ACLs don't seem to be able to match the cookies... > > I am trying to find a way to test new versions of my app (final checks) > before > they go live. > > The idea was this: > - remove check.txt, thus taking server down > - upgrade web app on that server > - set a special cookie in my browser > - go to haproxy, it should see the cookie and redirect to "down" server > - test the app > - when satisfied: `touch check.txt` and upgrade others too > > Is this possible? > 1) can haproxy redirect to "down" server? > 2) can it redirect based on a cookie? (I wouldn't want to hardcode IPs and > URLs can't be changed)
all you have described is possible but needlessly complicated. You should simply use the "force-persist" statement. It was designed exactly for your usage. You set the persistence cookie in your browser so that it can go to the server you want to test, and you match anything in the request which identifies your browser, as opposed to anyone else's. Most often, the source IP address or a second cookie are used. That way, you can safely test the down server from your browser while nobody else sees it. Regards, Willy
