Hello, dear community!
I kindly ask for your help in resolving my issue.
I have a server with a single-node CEPH setup with 5 OSDs. This server
has been powered off for about two years, and when I needed the data
from it, I found that the SSD where the system was installed had died.
I tried to recover the cluster. First, assuming the old CEPH is there I
installed Debian 10 with CEPH 12.2.11, mounted the OSDs to
/var/lib/ceph/osd/ceph-xx and assembled the monitor, as described here
https://forum.proxmox.com/threads/recover-ceph-from-osds-only.113699/.
However, the monitor wouldn't start, giving an error I don't remember.
Then I made a series of mistakes, upgrading the system and CEPH first to
Nautilus and then to Pacific. Eventually, I managed to start the
monitor, but a compatibility issue with the OSDs remains.
When the OSDs start, I see the message: /check_osdmap_features
require_osd_release unknown -> luminous
/At the same time, the monitor log shows: /disallowing boot of octopus+
OSD osd.xx.
/After starting, the OSD remains in the state: /tick checking mon for
new map/
Then I enabledmsgrv2 protocol and tried enabling RocksDB sharding for
the OSD, as described here
https://docs.ceph.com/en/latest/rados/configuration/bluestore-config-ref/#bluestore-rocksdb-sharding,
but it didn’t help.
Attempts to start the OSD with lower versions of CEPH event with Octopus
end with the error:
/2024-10-08 10:45:38.402975 7fba61b34ec0 -1 bluefs _replay 0x0: stop:
unrecognized op 12
2024-10-08 10:45:38.402992 7fba61b34ec0 -1 bluefs mount failed to replay
log: (5) Input/output error/
So, currently, I have CEPH 16.2.15, and the OSD is in the following state:
/"/var/lib/ceph/osd/ceph-1/block": {
"osd_uuid": "2bb56721-28c7-45cc-9344-6cc5c699a642",
"size": 4000681103360,
"btime": "2018-06-02 13:16:57.042205",
"description": "main",
"bfm_blocks": "61045632",
"bfm_blocks_per_key": "128",
"bfm_bytes_per_block": "65536",
"bfm_size": "4000681099264",
"bluefs": "1",
"ceph_fsid": "96b6ff1d-25bf-403f-be3d-78c2fb0ff747",
"kv_backend": "rocksdb",
"magic": "ceph osd volume v026",
"mkfs_done": "yes",
"ready": "ready",
"require_osd_release": "12",
"whoami": "1"
}/
with modified RocksDB to enable sharding.
Suggest me, please, Is there a way to upgrade such OSDs so they can run
with this version of Ceph?
If you need more information here, let me know and I will provide
whatever is needed.
--
Alexander Rydzewski
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