Hi Frédéric,
I agree. Maybe we should re-frame things? Containers can run on
bare-metal and containers can run virtualized. And distribution packages
can run bare-metal and virtualized as well.
What about asking independently about:
* Do you run containers or distribution packages?
* Do you run bare-metal or virtualized?
Best,
Sebastian
Am 24.05.24 um 12:28 schrieb Frédéric Nass:
Hello everyone,
Nice talk yesterday. :-)
Regarding containers vs RPMs and orchestration, and the related discussion from
yesterday, I wanted to share a few things (which I wasn't able to share
yesterday on the call due to a headset/bluetooth stack issue) to explain why we
use cephadm and ceph orch these days with bare-metal clusters even though, as
someone said, cephadm was not supposed to work with (nor support) bare-metal
clusters (which actually surprised me since cephadm is all about managing
containers on a host, regardless of its type). I also think this explains the
observation that was made that half of the reports (iirc) are supposedly using
cephadm with bare-metal clusters.
Over the years, we've deployed and managed bare-metal clusters with ceph-deploy
in Hammer, then switched to ceph-ansible (take-over-existing-cluster.yml) with
Jewel (or was it Luminous?), and then moved to cephadm, cephadm-ansible and
ceph-orch with Pacific, to manage the exact same bare-metal cluster. I guess
this explains why some bare-metal cluster today are managed using cephadm.
These are not new clusters deployed with Rook in K8s environments, but existing
bare-metal clusters that continue to servce brilliantly 10 years after
installation.
Regarding rpms vs containers, as mentioned during the call, not sure why one
would still want to use rpms vs containers considering the simplicity and
velocity that containers offer regarding upgrades with ceph orch clever
automation. Some reported performance reasons between rpms vs containers,
meaning rpms binaries would perform better than containers. Is there any
evidence of that?
Perhaps the reason why people still use RPMs is instead that they have invested
a lot of time and effort into developing automation tools/scripts/playbooks for
RPMs installations and they consider the transition to ceph orch and
containerized environments as a significant challenge.
Regarding containerized Ceph, I remember asking Sage for a minimalist CephOS
back in 2018 (there was no containers by that time). IIRC, he said maintaining
a ceph-specific Linux distro would take too much time and resources, so it was
not something considered at that time. Now that Ceph is all containers, I
really hope that a minimalist rolling Ceph distro comes out one day. ceph orch
could even handle rare distro upgrades such as kernel upgrades as well as
ordered reboots. This would make ceph clusters really easier to maintain over
time (compared to the last complicated upgrade path from non-containerized
RHEL7+RHCS4.3 to containerized RHEL9+RHCS5.2 that we had to follow a year ago).
Bests,
Frédéric.
----- Le 23 Mai 24, à 15:58, Laura floreslflo...@redhat.com a écrit :
Hi all,
The meeting will be starting shortly! Join us at this link:
https://meet.jit.si/ceph-user-dev-monthly
- Laura
On Wed, May 22, 2024 at 2:55 PM Laura Flores<lflo...@redhat.com> wrote:
Hi all,
The User + Dev Meetup will be held tomorrow at 10:00 AM EDT. We will be
discussing the results of the latest survey, and users who attend will have
the opportunity to provide additional feedback in real time.
See you there!
Laura Flores
Meeting Details:
https://www.meetup.com/ceph-user-group/events/300883526/
--
Laura Flores
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Chicago, IL
lflo...@ibm.com |lflo...@redhat.com <lflo...@redhat.com>
M: +17087388804
--
Laura Flores
She/Her/Hers
Software Engineer, Ceph Storage<https://ceph.io>
Chicago, IL
lflo...@ibm.com |lflo...@redhat.com <lflo...@redhat.com>
M: +17087388804
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