On 3/25/20 10:24 AM, Simon Oosthoek wrote:
On 25/03/2020 10:10, konstantin.ilyasov(a)mediascope.net
wrote:
That is why i am asking that question about
upgrade instruction.
I really don`t understand, how to upgrade/reinstall CentOS 7 to 8 without affecting the
work of cluster.
As i know, this process is easier on Debian, but we deployed our cluster Nautilus on
CentOS because there weren`t any packages for 14.x for Debian Stretch (9) or Buster(10).
P.s.: if this is even possible, i would like to know how to upgrade servers with CentOs7
+ ceph 14.2.8 to Debian 10 with ceph 15.2.0 (we have servers with OSD only and 3 servers
with Mon/Mgr/Mds)
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I guess you could upgrade each node one by one. So upgrade/reinstall the
OS, install Ceph 15 and re-initialise the OSDs if necessary. Though it
would be nice if there was a way to re-integrate the OSDs from the
previous installation...
That works just fine. You can re-install the host OS and have
ceph-volume scan all the volumes. The OSDs should then just come back.
Or you can take the even safer route by removing OSDs completely from
the cluster and wiping a box.
Did this recently with a customer. In the meantime they took the
oppertunity to also flash the firmware of all the components and the
machines came back again with a complete fresh installation.
Personally, I'm planning to wait for a while to
upgrade to Ceph 15, not
in the least because it's not convenient to do stuff like OS upgrades
from home ;-)
Currently we're running ubuntu 18.04 on the ceph nodes, I'd like to
upgrade to ubuntu 20.04 and then to ceph 15.
I think many people will do this. I wouldn't run 15.2.0 on my production
environment right away.
Wido
> Cheers
>
> /Simon
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