On 10/1/21 07:07, von Hoesslin, Volker wrote:
hi!
my cephfs is broken and i can not recover the mds-daemons. yesterday i have update my ceph-cluster from v15 to v16 and i thought all working fine.
Do you use cephadm? There was (is?) an issue with the way cephadm
upgrades the MDS, see the fix: https://github.com/ceph/ceph/pull/43214.
The procedure for updating MDS has changed:
https://docs.ceph.com/en/pacific/cephfs/upgrading/#upgrading-the-mds-cluster
Look on the mailinglist for "Cephfs - MDS all up:standby, not becoming
up:active" thread. If that is indeed the case, the solution would be to
set a cephfs flag: ceph fs compat cephfs add_incompat 7 "mds uses inline
data"
But make sure you are indeed facing the same issue. You don't want to
mess around with MDS.
Gr. Stefan
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