Hi,
I've some experience with Ceph, but haven't used cephadm much before,
and am trying to configure a pair of reef clusters with cephadm. A
couple of newbie questions, if I may:
* cephadm shell image
I'm in an isolated environment, so pulling from a local repository. I
bootstrapped OK with
cephadm --image docker-registry.wikimedia.org/ceph bootstrap ...
And that worked nicely, but if I want to run cephadm shell (to do any
sort of admin), then I have to specify
cephadm --image docker-registry.wikimedia.org/ceph shell
(otherwise it just hangs failing to talk to quay.io).
I found the docs, which refer to setting lots of other images, but not
the one that cephadm uses:
https://docs.ceph.com/en/reef/cephadm/install/#deployment-in-an-isolated-environment
I found an old tracker in this area: https://tracker.ceph.com/issues/47274
...but is there a good way to arrange for cephadm to use the
already-downloaded image without having to remember to specify --image
each time?
* OS reimages
We do OS upgrades by reimaging the server (which doesn't touch the
storage disks); on an old-style deployment you could then use
ceph-volume to re-start the OSDs and away you went; how does one do this
in a cephadm cluster?
[I presume involves telling cephadm to download a new image for podman
to use and suchlike]
Would the process be smoother if we arranged to leave /var/lib/ceph
intact between reimages?
Thanks,
Matthew
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