I assume upgrading cluster running in docker / podman containers should be
non issue is it? Just making sure. Also wonder if anything is different
in this case from normal container upgrade scenario
I.e. monitors -> mgrs -> osds -> mdss -> clients.
Thank you,
On Wed, Mar 25, 2020, 5:32 AM Wido den Hollander <wido(a)42on.com> wrote:
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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