Hey Wido, Thanks for your suggestion. It sounds like the process might be feasible but I'd be looking for an "official" thing to do to a production cluster. Something that's documented ceph.com/docs, tested and "endorsed" if you will by the Ceph team. We could try this on a pre-prod environment but it sounds rather "hacky", as in, there's a number of manual steps involved, including a couple where you're basically manipulating internal, persistent state information. I think most people would not be too inclined to do this to their production set ups. Best regards, George ________________________________________ 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
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