hi, thanks for the idea and i too use a static healthcheck file, though i have been burned a few times when mongrel dished up the file, but rails was in fact hung so am going to go back to rails method as soon as i can get queued healthchecks. not sure which version that is.
anyway, it has been my experience if i remove all the healthcheck files, then haproxy skips the queue and starts returning 5xx (no servers available) errors right away which defeats the purpose. On Fri, Feb 5, 2010 at 11:12 PM, David Birdsong <david.birds...@gmail.com> wrote: > On Fri, Feb 5, 2010 at 7:50 PM, Greg Gard <gg...@carepaths.com> wrote: >> hi, >> >> i would like to be able to pause traffic for a minute or so whilst i >> reload rails servers to use a different database. i have three >> different webservers and can probably write a script to nolb one >> server, reboot with new backend then turn that on while at the same >> time turn the remaing servers to nolb. the problem is that due to >> healtchecks not being queued in 1.13.20, i have turned their frequency >> down to like 30sec so i may have some data go to the old backend >> before the server gets marked down. i can make it work most likely, i >> was just wondering if there was a clean way to just "pause" all >> traffic so that all requests are queued for say a minute while i do >> what i need to and then resume traffic. >> >> is there a way to do this? > make the server fail the health check. > > if you health check is a static file, remove it. > > ...expand on that for dynamic health checks. > >> >> great work willy and friends. haproxy brings home the bacon every day...gg >> >> -- >> greg gard, psyd >> www.carepaths.com >> >> > -- greg gard, psyd www.carepaths.com
