Hi, On Tue, Jun 05, Martel, Michael H. wrote: > We're running HAproxy 1.5.18 on RedHat Enterprise 7.4, as the load balancer > for our LMS (Moodle). We have found that the course backup feature in Moodle > will return a 5xx error on some backups. We have determined that the > "timeout server" value needed to be increased.
Do these backup requests have specific urls that you can match with acl ? If you use separate backend for moodle backups then it should be possible to increase timeout server for just the backup requests. Something like frontend fe_moodle acl backup_req path_sub /something/backup use_backend moodle_backup if backup_req default_backend moodle ... backend moodle timeout server 1m ... backend moodle_backup timeout server 12m server moodle1 ... track moodle/moodle1 ... server moodle2 ... track moodle/moodle2 ... > Initially we were using a "timeout client 1m" and "timeout server 1m" . > Adjusting the server to "timeout server 12m" fixes the problem and does not > appear to introduce any other issues in our testing. > > I can't see any reason that I should have the "timeout client" and the > "timeout server" set to the same value. > > Is there anything I should watch out for after increasing the "timeout > server" by such a large amount ? Probably not, but AFAIK if the backend server "dies" after haproxy has forwarded the request (and before server responds) then client has to wait for timeout server (in reality I think everyone will just click stop or reload instead of waiting for the really long timeout). -Jarno -- Jarno Huuskonen
