> Op 20 december 2016 om 9:50 schreef Kees Meijs <k...@nefos.nl>: > > > Hi Wido, > > At the moment, we're running Ubuntu 14.04 LTS using the Ubuntu Cloud > Archive. To be precise again, it's QEMU/KVM 2.3+dfsg-5ubuntu9.4~cloud2 > linked to Ceph 0.94.8-0ubuntu0.15.10.1~cloud0. > > So yes, it's all about running a newer QEMU/KVM on a not so new version > of Ubuntu. > > Question is, are we able to run against a Ceph cluster running Jewel > instead of Hammer. Or, do we need to upgrade our OpenStack installation > first?
No, you don't. A Hammer/Jewel client can talk to a Hammer/Jewel cluster. One thing, don't change any CRUSH tunables if the cluster runs Jewel and the client is still on Hammer. The librados/librbd version is what matters. If you upgrade the cluster to Jewel and leave the client on Hammer it works. Wido > > Regards, > Kees > > On 13-12-16 09:26, Wido den Hollander wrote: > > Why? The Ubuntu Cloud Archive is there to provide you a newer Qemu on a > > older Ubuntu system. > > > > If you run Qemu under Ubuntu 16.04 and use the DEB packages directly from > > Ceph you should be fine. > > > > Recent Qemu and recent Ceph :) > _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
