But you don't get to choose which one is active and which one is standby, as these are states that permute over time, not configurations, or do you? I mean there's no way to tell Rook 'i want this one to be active preferably' and have Rook operator monitor MDSs and restart the non-local one if ever active so that the local preferred one becomes active. Or is Rook doing this any better than cephadm? Frédéric. ________________________________ De : Travis Nielsen <tnielsen@xxxxxxxxxx> Envoyé : mardi 29 octobre 2024 23:56 À : Gregory Farnum Cc: Sake Ceph; Adam King; ceph-users Objet : Re: MDS and stretched clusters Yes, with Rook this is possible by adding zone anti-affinity for the MDS pods. Travis On Tue, Oct 29, 2024 at 3:35 PM Gregory Farnum <gfarnum@xxxxxxxxxx> wrote: > No, unfortunately this needs to be done at a higher level and is not > included in Ceph right now. Rook may be able to do this, but I don't think > cephadm does. > Adam, is there some way to finagle this with pod placement rules (ie, > tagging nodes as mds and mds-standby, and then assigning special mds config > info to corresponding pods)? > -Greg > > On Tue, Oct 29, 2024 at 12:46 PM Sake Ceph <ceph@xxxxxxxxxxx> wrote: > > > I hope someone of the development team can share some light on this. Will > > search the tracker if some else made a request about this. > > > > > Op 29-10-2024 16:02 CET schreef Frédéric Nass < > > frederic.nass@xxxxxxxxxxxxxxxx>: > > > > > > > > > Hi, > > > > > > I'm not aware of any service settings that would allow that. > > > > > > You'll have to monitor each MDS state and restart any non-local active > > MDSs to reverse roles. > > > > > > Regards, > > > Frédéric. > > > > > > ----- Le 29 Oct 24, à 14:06, Sake Ceph ceph@xxxxxxxxxxx a écrit : > > > > > > > Hi all > > > > We deployed successfully a stretched cluster and all is working fine. > > But is it > > > > possible to assign the active MDS services in one DC and the > > standby-replay in > > > > the other? > > > > > > > > We're running 18.2.4, deployed via cephadm. Using 4 MDS servers with > 2 > > active > > > > MDS on pinnend ranks and 2 in standby-replay mode. > > > > _______________________________________________ > > > > ceph-users mailing list -- ceph-users@xxxxxxx > > > > To unsubscribe send an email to ceph-users-leave@xxxxxxx > > > _______________________________________________ > > > ceph-users mailing list -- ceph-users@xxxxxxx > > > To unsubscribe send an email to ceph-users-leave@xxxxxxx > > _______________________________________________ > > ceph-users mailing list -- ceph-users@xxxxxxx > > To unsubscribe send an email to ceph-users-leave@xxxxxxx > > > _______________________________________________ > ceph-users mailing list -- ceph-users@xxxxxxx > To unsubscribe send an email to ceph-users-leave@xxxxxxx > _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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