On Wed, Jul 15, 2020 at 10:33 AM Girish Moodalbail <gmoodalb...@gmail.com> wrote: > > Hello Numan, > > We found a minor issue with this patch in our OVN K8s setup. Say, we have set > the northd_probe_interval to 50ms, and we have 3 instances of `ovn-northd` > running. In this setup, one of the ovn-northd instances will be active, > whilst the remaining two instances will be in 'standby' mode. > > From my reading of ovn-northd.c`main(), the active instance will read the > northd_probe_interval value and set it on its NB and SB IDLs. However, for > the two standby instances we wouldn't have set that value on their NB and SB > IDLs. Until all the standby instances become active, they will still have the > default inactivity probe interval value of 5sec. > > So, in a large k8s cluster we are seeing that the standby ovn-northd > instances are not able to latch on to connections for a long time due to the > short inactivity probe interval value.
Hi Girish, Thanks for reporting the issue. I'll take a look into it next week. Thanks Numan > > Regards, > ~Girish > > On Wed, Mar 4, 2020 at 10:54 PM Numan Siddique <num...@ovn.org> wrote: >> >> On Thu, Mar 5, 2020 at 11:40 AM Girish Moodalbail >> <gmoodalb...@nvidia.com> wrote: >> > >> > Hello Numan, >> > >> > On 3/4/20, 9:58 PM, "Numan Siddique" <num...@ovn.org> wrote: >> > >> > External email: Use caution opening links or attachments >> > >> > >> > On Thu, Mar 5, 2020 at 10:22 AM Girish Moodalbail >> > <gmoodalb...@nvidia.com> wrote: >> > > >> > > Hello Numan, >> > > >> > > Thank you for getting this done __. >> > > >> > > Quick comment: The option set on NB_Global also affects ovn-northd's >> > connection to OVN SB as well. Typically, one would expect any option on >> > NB_Global should affect ovsdb-server managing OVN NB DB alone, right? >> > Should we add similar option to SB_Global as well? >> > >> > Hi Girish, >> > >> > This newly added option probe_interval (which will be renamed to >> > northd_probe_interval) applies to both Northbound and Southbound >> > connections from ovn-northd. >> > So there is no need to add in SB_Global. And CMS is not supposed to do >> > any write txns to Southbound db. >> > >> > I see. If that is the case, then one option should be fine then. >> >> Thanks Han and Girish for the review and comments. >> >> I applied this patch to master with the changes suggested by Han. >> >> Thanks >> Numan >> >> > >> > Regards, >> > ~Girish >> > >> > >> > >> > ----------------------------------------------------------------------------------- >> > This email message is for the sole use of the intended recipient(s) and >> > may contain >> > confidential information. Any unauthorized review, use, disclosure or >> > distribution >> > is prohibited. If you are not the intended recipient, please contact the >> > sender by >> > reply email and destroy all copies of the original message. >> > ----------------------------------------------------------------------------------- >> > _______________________________________________ >> > dev mailing list >> > d...@openvswitch.org >> > https://mail.openvswitch.org/mailman/listinfo/ovs-dev >> _______________________________________________ >> dev mailing list >> d...@openvswitch.org >> https://mail.openvswitch.org/mailman/listinfo/ovs-dev > > -- > You received this message because you are subscribed to the Google Groups > "ovn-kubernetes" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to ovn-kubernetes+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/ovn-kubernetes/CAAF2STRuQX-Ft-S6RLeJFTdvVe2Z46eQsTg8H9nixhDFzOppJw%40mail.gmail.com. _______________________________________________ dev mailing list d...@openvswitch.org https://mail.openvswitch.org/mailman/listinfo/ovs-dev
