Hi all,
 
not sure it's ok to ask questions here as we are only a little Theater where I 
manage the data of our sound and video files.
I set up a ceph cluster as second backup location on bullseye with quincy which 
worked flawless.
All runs smooth but I thought I would have to do a step forward to get on track.
Yes I know: never change a running system. :-D
After updating all three nodes I forget to set the ceph packages on hold so 
they were updated to reef with trixie. No way to downgrade ...I tried a 
lot....! So I went forward.
After all all 3 nodes are back online running reef my cluster seems to work, my 
cephfs share is reachable by my client machine, backups are working.
This is my ceph status output:
 
cluster:
id: c5986871-ab9f-4365-8113-a1854fa07786
health: HEALTH_WARN
15 mgr modules have failed dependencies

services:
mon: 3 daemons, quorum ceph1,ceph2,ceph3 (age 19h)
mgr: ceph1(active, since 18h), standbys: ceph2, ceph3
mds: 1/1 daemons up, 2 standby
osd: 24 osds: 24 up (since 19h), 24 in (since 22M)

data:
volumes: 1/1 healthy
pools: 3 pools, 1041 pgs
objects: 3.34M objects, 11 TiB
usage: 32 TiB used, 56 TiB / 87 TiB avail
pgs: 1041 active+clean
 
Problem: dashboard is not working any more and I have this erre/warn:
 
15 mgr modules have failed dependencies
 
 
The cluster was made without podman/containers.
 
ceph-crash gives me a flood of this errors:
 
...
WARNING:ceph-crash:post 
/var/lib/ceph/crash/2025-08-21T11:51:45.411885Z_738ee242-f7bd-4f6c-bd90-d96a08e06bf6
 as client.admin failed: 2025-08-22T06:55:50.234+0000 7ff72cea96c0 -1 auth: 
unable to find a keyring on 
/etc/ceph/ceph.client.admin.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin:
 (2) No such file or directory
2025-08-22T06:55:50.234+0000 7ff72cea96c0 -1 AuthRegistry(0x7ff728064068) no 
keyring found at 
/etc/ceph/ceph.client.admin.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin,
 disabling cephx
2025-08-22T06:55:50.238+0000 7ff72cea96c0 -1 auth: unable to find a keyring on 
/etc/ceph/ceph.client.admin.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin:
 (2) No such file or directory
2025-08-22T06:55:50.238+0000 7ff72cea96c0 -1 AuthRegistry(0x7ff728068540) no 
keyring found at 
/etc/ceph/ceph.client.admin.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin,
 disabling cephx
2025-08-22T06:55:50.238+0000 7ff72cea96c0 -1 auth: unable to find a keyring on 
/etc/ceph/ceph.client.admin.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin:
 (2) No such file or directory
2025-08-22T06:55:50.238+0000 7ff72cea96c0 -1 AuthRegistry(0x7ff72cea8410) no 
keyring found at 
/etc/ceph/ceph.client.admin.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin,
 disabling cephx
[errno 2] RADOS object not found (error connecting to the cluster)
WARNING:ceph-crash:post 
/var/lib/ceph/crash/2025-08-21T10:54:08.817091Z_34eaeca9-7883-4b93-b75d-83102c113baa
 as client.crash.ceph1 failed: 2025-08-22T06:55:50.318+0000 7f81b3ea96c0 -1 
auth: unable to find a keyring on 
/etc/ceph/ceph.client.crash.ceph1.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin:
 (2) No such file or directory
2025-08-22T06:55:50.318+0000 7f81b3ea96c0 -1 AuthRegistry(0x7f81ac0640c8) no 
keyring found at 
/etc/ceph/ceph.client.crash.ceph1.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin,
 disabling cephx
2025-08-22T06:55:50.318+0000 7f81b3ea96c0 -1 auth: unable to find a keyring on 
/etc/ceph/ceph.client.crash.ceph1.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin:
 (2) No such file or directory
2025-08-22T06:55:50.318+0000 7f81b3ea96c0 -1 AuthRegistry(0x7f81ac0686c0) no 
keyring found at 
/etc/ceph/ceph.client.crash.ceph1.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin,
 disabling cephx
2025-08-22T06:55:50.318+0000 7f81b3ea96c0 -1 auth: unable to find a keyring on 
/etc/ceph/ceph.client.crash.ceph1.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin:
 (2) No such file or directory
2025-08-22T06:55:50.318+0000 7f81b3ea96c0 -1 AuthRegistry(0x7f81b3ea8410) no 
keyring found at 
/etc/ceph/ceph.client.crash.ceph1.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin,
 disabling cephx
[errno 2] RADOS object not found (error connecting to the cluster)
WARNING:ceph-crash:post 
/var/lib/ceph/crash/2025-08-21T10:54:08.817091Z_34eaeca9-7883-4b93-b75d-83102c113baa
 as client.crash failed: 2025-08-22T06:55:50.398+0000 7f5ba2ea96c0 -1 auth: 
unable to find a keyring on 
/etc/ceph/ceph.client.crash.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin:
 (2) No such file or directory
2025-08-22T06:55:50.398+0000 7f5ba2ea96c0 -1 AuthRegistry(0x7f5b9c064068) no 
keyring found at 
/etc/ceph/ceph.client.crash.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin,
 disabling cephx
2025-08-22T06:55:50.398+0000 7f5ba2ea96c0 -1 auth: unable to find a keyring on 
/etc/ceph/ceph.client.crash.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin:
 (2) No such file or directory
2025-08-22T06:55:50.398+0000 7f5ba2ea96c0 -1 AuthRegistry(0x7f5b9c068540) no 
keyring found at 
/etc/ceph/ceph.client.crash.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin,
 disabling cephx
2025-08-22T06:55:50.398+0000 7f5ba2ea96c0 -1 auth: unable to find a keyring on 
/etc/ceph/ceph.client.crash.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin:
 (2) No such file or directory
2025-08-22T06:55:50.398+0000 7f5ba2ea96c0 -1 AuthRegistry(0x7f5ba2ea8410) no 
keyring found at 
/etc/ceph/ceph.client.crash.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin,
 disabling cephx
[errno 2] RADOS object not found (error connecting to the cluster)
WARNING:ceph-crash:post 
/var/lib/ceph/crash/2025-08-21T10:54:08.817091Z_34eaeca9-7883-4b93-b75d-83102c113baa
 as client.admin failed: 2025-08-22T06:55:50.478+0000 7fc8494fe6c0 -1 auth: 
unable to find a keyring on 
/etc/ceph/ceph.client.admin.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin:
 (2) No such file or directory
2025-08-22T06:55:50.478+0000 7fc8494fe6c0 -1 AuthRegistry(0x7fc844064068) no 
keyring found at 
/etc/ceph/ceph.client.admin.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin,
 disabling cephx
2025-08-22T06:55:50.482+0000 7fc8494fe6c0 -1 auth: unable to find a keyring on 
/etc/ceph/ceph.client.admin.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin:
 (2) No such file or directory
2025-08-22T06:55:50.482+0000 7fc8494fe6c0 -1 AuthRegistry(0x7fc844068540) no 
keyring found at 
/etc/ceph/ceph.client.admin.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin,
 disabling cephx
2025-08-22T06:55:50.482+0000 7fc8494fe6c0 -1 auth: unable to find a keyring on 
/etc/ceph/ceph.client.admin.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin:
 (2) No such file or directory
2025-08-22T06:55:50.482+0000 7fc8494fe6c0 -1 AuthRegistry(0x7fc8494fd410) no 
keyring found at 
/etc/ceph/ceph.client.admin.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin,
 disabling cephx
[errno 2] RADOS object not found (error connecting to the cluster)
WARNING:ceph-crash:post 
/var/lib/ceph/crash/2025-08-21T10:28:14.730789Z_ad2ef583-85b7-4cf0-a2fd-2fa3b775a7a2
 as client.crash.ceph1 failed: 2025-08-22T06:55:50.562+0000 7f83d9aa96c0 -1 
auth: unable to find a keyring on 
/etc/ceph/ceph.client.crash.ceph1.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin:
 (2) No such file or directory
2025-08-22T06:55:50.562+0000 7f83d9aa96c0 -1 AuthRegistry(0x7f83d40640c8) no 
keyring found at 
/etc/ceph/ceph.client.crash.ceph1.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin,
 disabling cephx
2025-08-22T06:55:50.562+0000 7f83d9aa96c0 -1 auth: unable to find a keyring on 
/etc/ceph/ceph.client.crash.ceph1.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin:
 (2) No such file or directory
2025-08-22T06:55:50.562+0000 7f83d9aa96c0 -1 AuthRegistry(0x7f83d40686c0) no 
keyring found at 
/etc/ceph/ceph.client.crash.ceph1.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin,
 disabling cephx
2025-08-22T06:55:50.562+0000 7f83d9aa96c0 -1 auth: unable to find a keyring on 
/etc/ceph/ceph.client.crash.ceph1.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin:
 (2) No such file or directory
2025-08-22T06:55:50.562+0000 7f83d9aa96c0 -1 AuthRegistry(0x7f83d9aa8410) no 
keyring found at 
/etc/ceph/ceph.client.crash.ceph1.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin,
 disabling cephx
[errno 2] RADOS object not found (error connecting to the cluster)
WARNING:ceph-crash:post 
/var/lib/ceph/crash/2025-08-21T10:28:14.730789Z_ad2ef583-85b7-4cf0-a2fd-2fa3b775a7a2
 as client.crash failed: 2025-08-22T06:55:50.642+0000 7f2a37aa96c0 -1 auth: 
unable to find a keyring on 
/etc/ceph/ceph.client.crash.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin:
 (2) No such file or directory
2025-08-22T06:55:50.642+0000 7f2a37aa96c0 -1 AuthRegistry(0x7f2a30064068) no 
keyring found at 
/etc/ceph/ceph.client.crash.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin,
 disabling cephx
2025-08-22T06:55:50.646+0000 7f2a37aa96c0 -1 auth: unable to find a keyring on 
/etc/ceph/ceph.client.crash.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin:
 (2) No such file or directory
2025-08-22T06:55:50.646+0000 7f2a37aa96c0 -1 AuthRegistry(0x7f2a30068540) no 
keyring found at 
/etc/ceph/ceph.client.crash.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin,
 disabling cephx
2025-08-22T06:55:50.646+0000 7f2a37aa96c0 -1 auth: unable to find a keyring on 
/etc/ceph/ceph.client.crash.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin:
 (2) No such file or directory
2025-08-22T06:55:50.646+0000 7f2a37aa96c0 -1 AuthRegistry(0x7f2a37aa8410) no 
keyring found at 
/etc/ceph/ceph.client.crash.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin,
 disabling cephx
[errno 2] RADOS object not found (error connecting to the cluster)
WARNING:ceph-crash:post 
/var/lib/ceph/crash/2025-08-21T10:28:14.730789Z_ad2ef583-85b7-4cf0-a2fd-2fa3b775a7a2
 as client.admin failed: 2025-08-22T06:55:50.726+0000 7fa805ea96c0 -1 auth: 
unable to find a keyring on 
/etc/ceph/ceph.client.admin.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin:
 (2) No such file or directory
2025-08-22T06:55:50.726+0000 7fa805ea96c0 -1 AuthRegistry(0x7fa800064068) no 
keyring found at 
/etc/ceph/ceph.client.admin.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin,
 disabling cephx
2025-08-22T06:55:50.726+0000 7fa805ea96c0 -1 auth: unable to find a keyring on 
/etc/ceph/ceph.client.admin.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin:
 (2) No such file or directory
2025-08-22T06:55:50.726+0000 7fa805ea96c0 -1 AuthRegistry(0x7fa800068540) no 
keyring found at 
/etc/ceph/ceph.client.admin.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin,
 disabling cephx
2025-08-22T06:55:50.726+0000 7fa805ea96c0 -1 auth: unable to find a keyring on 
/etc/ceph/ceph.client.admin.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin:
 (2) No such file or directory
2025-08-22T06:55:50.726+0000 7fa805ea96c0 -1 AuthRegistry(0x7fa805ea8410) no 
keyring found at 
/etc/ceph/ceph.client.admin.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin,
 disabling cephx
[errno 2] RADOS object not found (error connecting to the cluster)
......
 
In /etc/ceph I have
 
ceph.client.admin.keyring
ceph.conf
rbdmap
 
 
Maye there is a way to fix this but if it's to complicated I will think about a 
complete re-install.
I'm not an admin but an amateur with some linux knowledge. 
If there is hope and someone could support to solev this I would be very happy!
 
Regards,
 
Christian Peters
 
 
 
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