On Fri, Feb 05, 2010 at 11:43:31PM -0500, Greg Gard wrote:
> 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.
Then I suspect you can do that using the tcp-inspect rules. Warning,
this is dirty. You have been warned. Basically :
frontend xxx
tcp-request inspect-delay 1m
tcp-request content accept if nbsrv(yyy) gt 0
...
backend yyy
server zzz check
Doing that should make the request wait up to one minute if no server
appears up in backend bk_name. The request will not be automatically
unblocked one a server is there, it will only be unblocked if there
is some activity on the socket when one server is OK (very unlikely),
or after the timeout delay.
Regards,
Willy
