Hello,
We are running a ceph nautilus cluster under centos 7. To upgrade to
pacific we need to change to a more recent distro (probably debian or
ubuntu because of the recent announcement about centos 8, but the distro
doesn't matter very much).
However, I could'nt find a clear procedure to upgrade ceph AND the
distro ! As we have more than 100 osds and ~600TB of data, we would
like to avoid as far as possible to wipe the disks and
rebuild/rebalance. It seems to be possible to reinstall a server and
reuse the osds, but the exact procedure remains quite unclear to me.
What is the best way to proceed ? Does someone have done that and have a
rather detailed doc on how to proceed ?
Thanks for your help !
F.
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