Hi Sebastian,
On Thu, Sep 02, 2021 at 11:21:07AM +0200, Sebastian Wagner wrote:
On Mon, Aug 30, 2021 at 03:52:29PM +1000, Chris Dunlop wrote:
I'm stuck, mid upgrade from octopus to pacific using cephadm, at
the point of upgrading the mons.
Could you please verify that the mon_map of each mon contains all and
correct mons?
The existing octopus mons are in quorum with no health warnings so
yes, at that point the mon_maps are fine. This issue comes about when
trying to add a new pacific mon to the existing octopus mons.
The normal mon upgrade process is "in-place", i.e. taking down an old
version mon and bringing up a new version mon on top of the existing
mon database etc. Because of other problems (docker version too old,
and never having a cephfs on the cluster tickling a upgrade bug[0])
the in-place upgrade failed twice. That made me a bit wary of the
in-place upgrade, so once I'd recovered the cluster back to full
health I thought I'd try adding a new pacific mon rather than do an
in-place upgrade. That's when I came across this issue of the new
pacific mon not joining the old octopus mons. Whilst not the normal
upgrade path, adding a new version mon to old version mons is expected
to work, but in this case it didn't.
See also the thread started on ceph-devel on this issue, there's been
a bit more activity over there:
https://www.spinics.net/lists/ceph-devel/msg52181.html
Cheers,
Chris
[0] https://tracker.ceph.com/issues/51673
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