Dear Sage, Am 13.12.19 um 17:43 schrieb Sage Weil: > Ceph Octopus will be based on CentOS 8. It's due out in March. > > The centos8 transition is awkward because our python 2 dependencies don't > exist on in centos8, and it is a huge amount of effort to produce them. > Octopus switches to python 3, but those dependencies cannot be produces > for centos7. So the nautilus->octopus upgrade will be either involve a > transition to the new containerized deployment (either cephadm or > ceph-ansible's container mode) or a simultaneous upgrade of the OS and > Ceph. is there already a migration approach with minimum downtime for the non-containerized setup when using CephFS? The problem I see would be that after reducing to a single active MDS per rank, upgrading that "in place" would mean machine reinstallation. Would the following approach work? 1. Reinstall a standby MDS (upgrading to CentOS 8 and Octopus), but do not start the actual service yet. 2. Shut down all other MDS of that rank, and start the new MDS on the freshly installed node. This should minimize the downtime to the "failover time" as usual. Should that work without issues? If so, we'll try that out sometime summer next year on a less critical cluster ;-). Cheers, Oliver > > sage > > > >> >> Regards >> Manuel >> >> On Mon, 2 Dec 2019 11:16:01 +0100 >> Jan Kasprzak <kas@xxxxxxxxxx> wrote: >> >>> Hello, Ceph users, >>> >>> does anybody use Ceph on recently released CentOS 8? Apparently there >>> are no el8 packages neither at download.ceph.com, nor in the native >>> CentOS package tree. I am thinking about upgrading my cluster to C8 >>> (because of other software running on it apart from Ceph). Do el7 >>> packages simply work? Can they be rebuilt using rpmbuild --rebuild? >>> Or is running Ceph on C8 more complicated than that? >>> >>> Thanks, >>> >>> -Yenya >>> >> _______________________________________________ >> 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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