> Op 28 juni 2017 om 22:12 schreef Gregory Farnum <gfarnum@xxxxxxxxxx>: > > > On Wed, Jun 28, 2017 at 6:33 AM <george.vasilakakos@xxxxxxxxxx> wrote: > > > > I don't think either. I don't think there is another way then just > > 'hacky' changing the MONMaps. There have been talks of being able to make > > Ceph dual-stack, but I don't think there is any code in the source right > > now. > > > > Yeah, that's what I'd like to know. What do the Ceph team think of > > providing ways for switching? > > We're not in any need to do so now but, it'd be good to know if the team > > dual-stack support or at least to test and document a way to do it as > > opposed to a "this should work but you're on your own" kind of deal. > > > > My understanding is that sepia's current infrastructure hosting can't give > us real IPv6, so we're not in any position to really make any promises > about interoperability. Sorry. :( > > That said, I think Wido's list is the way to go — but I don't remember the > problem with running mixed. Is it just that the messenger implementations > don't handle it live, I think? Certainly shutting down, updating all the > monmaps/configs (if you are setting monitor IP addresses instead of hosts), > and then turning it all back on should work but you're on your own... ;) > -Greg > The problem with mixed is this: - The OSDMap/MONMap can only contain ONE IP, eg, IPv4 or IPv6 - Messengers can't talk dual-stacked So you have to shut down the whole cluster and update the MONMap. Afterwards the OSDs will boot and 'up' themselves in the cluster with their IPv6 address and that will be recorded in the OSDMap. Wido > > > > > > > > ________________________________________ > > > From: Wido den Hollander [wido@xxxxxxxx] > > > Sent: 27 June 2017 19:19 > > > To: Vasilakakos, George (STFC,RAL,SC); ceph-users@xxxxxxxxxxxxxx > > > Subject: Re: Ceph and IPv4 -> IPv6 > > > > > > > Op 27 juni 2017 om 19:00 schreef george.vasilakakos@xxxxxxxxxx: > > > > > > > > > > > > Hey Ceph folks, > > > > > > > > I was wondering what the current status/roadmap/intentions etc. are on > > the possibility of providing a way of transitioning a cluster from IPv4 to > > IPv6 in the future. > > > > > > > > My current understanding is that this not possible at the moment and > > that one should deploy initially with the version they want long term. > > > > > > > > However, given the general lack of widespread readiness, I think lots > > of us have deployed with IPv4 and were hoping to go to IPv6 when the rest > > of our environments enabled it. > > > > > > > > Is adding such a capability to a future version of Ceph being > > considered? > > > > > > > > > > I think you can, but not without downtime. > > > > > > The main problem is the monmap which contains IPv4 addresses and you > > want to change that to IPv6. > > > > > > I haven't tried this, but I think you should be able to: > > > - Extract MONMap > > > - Update the IPv4 addresses to IPv6 using monmaptool > > > - Set noout flag > > > - Stop all OSDs > > > - Inject new monmap > > > - Stop MONs > > > - Make sure IPv6 is fixed on MONs > > > - Start MONs > > > - Start OSDs > > > > > > Again, this is from the top of my head, haven't tried it, but something > > like that should probably work. > > > > > > Wido > > > > > > > > > > > > > > Best regards, > > > > > > > > George V. > > > > _______________________________________________ > > > > ceph-users mailing list > > > > ceph-users@xxxxxxxxxxxxxx > > > > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > _______________________________________________ > > ceph-users mailing list > > ceph-users@xxxxxxxxxxxxxx > > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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