If you really wanted to make sure the standby was serving requests during that period, you could try starting and stopping via the ha-maintenance-start command. I don't do it that frequently, but I run that command before installing updates and rebooting the main kea server.
--Dan On Wed, Nov 16, 2022 at 10:42 AM perl-list <perl-l...@network1.net> wrote: > The hot-standby will only start after some criteria are met. Some of the > parameters are tunable. See: > https://kea.readthedocs.io/en/kea-1.8.1/arm/hooks.html#load-balancing-configuration > Not sure if you can tune it to start responding within a 30 to 35 second > window. > > We just modify the config on disk and then restart the kea process, but > then we aren't doing anything special with databases or anything, just the > JSON config in a single file. We also aren't changing the config and > restarting every 5 minutes. > > ----- Original Message ----- > > From: "Veronique Lefebure" <veronique.lefeb...@cern.ch> > > To: "kea-users" <kea-users@lists.isc.org> > > Sent: Wednesday, November 16, 2022 11:27:07 AM > > Subject: [Kea-users] How to best update the KEA configuration on a HA > hot-standby KEA setup > > > Hi, > > > When running KEA on one single server, (no HA), and updating the KEA dhcp > > configuration file every 5 minute, using "config-set" > > [ > > > https://kea.readthedocs.io/en/latest/arm/ctrl-channel.html?highlight=config-set#the-config-set-command > > | > > > https://kea.readthedocs.io/en/latest/arm/ctrl-channel.html?highlight=config-set#the-config-set-command > > ] , > > we can see that KEA does not reply to the DHCP requests during 30-35 > seconds > > while "config-set" is running. > > > Is it expected ? > > If yes, if we add a second server in a HA hot-standby mode, can we > expect it to > > answer to the DHCP requests while the first server is busy with > config-set ? > > If yes, we need to update the second server asynchronously with respect > to the > > first one, else they would both be busy with "config-set" at the same > time. > > > I would be interested to know how people are updating the KEA DHCP > configuration > > in a HA hot-standby setup. > > > Thanks, > > Veronique > > > -- > > ISC funds the development of this software with paid support > subscriptions. > > Contact us at https://www.isc.org/contact/ for more information. > > > To unsubscribe visit https://lists.isc.org/mailman/listinfo/kea-users. > > > Kea-users mailing list > > Kea-users@lists.isc.org > > https://lists.isc.org/mailman/listinfo/kea-users > -- > ISC funds the development of this software with paid support > subscriptions. Contact us at https://www.isc.org/contact/ for more > information. > > To unsubscribe visit https://lists.isc.org/mailman/listinfo/kea-users. > > Kea-users mailing list > Kea-users@lists.isc.org > https://lists.isc.org/mailman/listinfo/kea-users >
-- ISC funds the development of this software with paid support subscriptions. Contact us at https://www.isc.org/contact/ for more information. To unsubscribe visit https://lists.isc.org/mailman/listinfo/kea-users. Kea-users mailing list Kea-users@lists.isc.org https://lists.isc.org/mailman/listinfo/kea-users