Hi Stéphane,
Sorry I was busy and did not look at your previous answers... It is a
bit difficult for me to understand how you ended up in this situation
but for me it is strange that ceph-02 complains about a missing keyring
and the corruped rocks.db on a freshly created cluster is also a bit
strange for me. I don't think it makes sense to destroy and recreate the
OSD, I am running several clusters with hundreds of OSDs and I never saw
a mis-initialized one. The problem is hiding something else I'm afraid.
Because of some misconfiguration, may be one OSD is in a bad state and
may need to be reinitialized but first we should get the 3 mons running
properly and `cephadm shell` working properly on the 3 hosts. And the
rocks.db compaction issue for me is related to your mon, not to an OSD.
Have you checked that SSH configuration for cephadm is working well from
any host to any other one in your cluster (with 3 hosts, it should be
really straighforward to check). The ceph-02 problem may be the sign of
SSH misconfiguration as cephadm will use SSH connection to push the
keyring, if I am right.
Michel
Le 21/07/2025 à 12:17, Stéphane Barthes a écrit :
Hi,
Should I just wipe the OSD and let ceph rebuild it (as suggested there
:
https://ceph-users.ceph.narkive.com/LO6ebu9r/how-to-recover-from-corrupted-rocksdb)
?
Which would the suggested way be :
cephadm rm-daemon osd.ceph-01
then
cephadm deploy ?
Regards,
S. Barthes
T: +33 4 72 52 35 40 M: +33 6 14 73 18 34
InTest S.A.
4 Allée du Levant
69890 La Tour de Salvagny
Le 21/07/2025 à 10:33, Stéphane Barthes a écrit :
Michel,
ceph-02 logs :
root@srvr-ceph-02:/# ceph log last debug cephadm
2025-07-21T08:16:54.814+0000 7efe1a884640 -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
2025-07-21T08:16:54.814+0000 7efe1a884640 -1
AuthRegistry(0x7efe14064de0) no keyring found at
/etc/ceph/ceph.client.admin.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin,
disabling cephx
2025-07-21T08:16:54.818+0000 7efe1a884640 -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
2025-07-21T08:16:54.818+0000 7efe1a884640 -1
AuthRegistry(0x7efe1a883000) no keyring found at
/etc/ceph/ceph.client.admin.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin,
disabling cephx
2025-07-21T08:16:54.818+0000 7efe137fe640 -1 monclient(hunting):
handle_auth_bad_method server allowed_methods [2] but i only support [1]
2025-07-21T08:16:54.818+0000 7efe18e21640 -1 monclient(hunting):
handle_auth_bad_method server allowed_methods [2] but i only support [1]
2025-07-21T08:16:57.818+0000 7efe137fe640 -1 monclient(hunting):
handle_auth_bad_method server allowed_methods [2] but i only support [1]
2025-07-21T08:16:57.818+0000 7efe13fff640 -1 monclient(hunting):
handle_auth_bad_method server allowed_methods [2] but i only support [1]
2025-07-21T08:17:00.818+0000 7efe137fe640 -1 monclient(hunting):
handle_auth_bad_method server allowed_methods [2] but i only support [1]
2025-07-21T08:17:00.818+0000 7efe18e21640 -1 monclient(hunting):
handle_auth_bad_method server allowed_methods [2] but i only support [1]
^CCluster connection aborted
root@srvr-ceph-02:/#
Regarding the ceph-01 log, there is a LOT. looking from the end, I
see this :
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: debug -19>
2025-07-20T17:52:21.137+0000 7f359f42d8c0 2 auth: KeyRing::load:
loaded key file /var/lib/ceph/mon/ceph-srvr-ceph-01/keyring
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: debug -18>
2025-07-20T17:52:21.137+0000 7f359f42d8c0 2 mon.srvr-ceph-01@-1(???)
e5 init
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: debug -17>
2025-07-20T17:52:21.137+0000 7f359f42d8c0 4 mgrc handle_mgr_map Got
map version 73
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: debug -16>
2025-07-20T17:52:21.137+0000 7f359f42d8c0 4 mgrc handle_mgr_map
Active mgr is now
[v2:10.32.100.24:6800/4015208663,v1:10.32.100.24:6801/4015208663]
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: debug -15>
2025-07-20T17:52:21.137+0000 7f359f42d8c0 4 mgrc reconnect Starting
new session with
[v2:10.32.100.24:6800/4015208663,v1:10.32.100.24:6801/4015208663]
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: debug -14>
2025-07-20T17:52:21.137+0000 7f359c206640 -1 mon.srvr-ceph-01@-1(???)
e5 handle_auth_bad_method hmm, they didn't like 2 result (13)
Permission denied
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: debug -13>
2025-07-20T17:52:21.137+0000 7f359f42d8c0 0
mon.srvr-ceph-01@-1(probing) e5 my rank is now 0 (was -1)
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: debug -12>
2025-07-20T17:52:21.161+0000 7f359d208640 3 rocksdb:
[db/db_impl/db_impl_compaction_flush.cc:3026] Compaction error:
Corruption: block checksum mismatch: stored = 3368055299, computed =
2100551158 in
/var/lib/ceph/mon/ceph-srvr-ceph-01/store.db/061999.sst offset
10379525 size 91317
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: debug -11>
2025-07-20T17:52:21.161+0000 7f359d208640 4 rocksdb: (Original Log
Time 2025/07/20-17:52:21.164193)
[db/compaction/compaction_job.cc:812] [default] compacted to: base
level 6 level multiplier 10.00 max bytes base 268435456 files[4 0 0 0
0 0 1] max score 0.00, MB/sec: 514.9 rd, 272.6 wr, level 6, files
in(4, 1) out(0) MB in(4.0, 14.8) out(9.9), read-write-amplify(7.2)
write-amplify(2.5) Corruption: block checksum mismatch: stored =
3368055299, computed = 2100551158 in
/var/lib/ceph/mon/ceph-srvr-ceph-01/store.db/061999.sst offset
10379525 size 91317, records in: 25191, records dropped: 3
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: debug -10>
2025-07-20T17:52:21.161+0000 7f359d208640 4 rocksdb: (Original Log
Time 2025/07/20-17:52:21.164212) EVENT_LOG_v1 {"time_micros":
1753033941164205, "job": 3, "event": "compaction_finished",
"compaction_time_micros": 38166, "compaction_time_cpu_micros": 25133,
"output_level": 6, "num_output_files": 0, "total_output_size":
10404253, "num_input_records": 25191, "num_output_records": 21216,
"num_subcompactions": 1, "output_compression": "NoCompression",
"num_single_delete_mismatches": 0, "num_single_delete_fallthrough":
0, "lsm_state": [4, 0, 0, 0, 0, 0, 1]}
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: debug -9>
2025-07-20T17:52:21.161+0000 7f359d208640 2 rocksdb:
[db/db_impl/db_impl_compaction_flush.cc:2545] Waiting after
background compaction error: Corruption: block checksum mismatch:
stored = 3368055299, computed = 2100551158 in
/var/lib/ceph/mon/ceph-srvr-ceph-01/store.db/061999.sst offset
10379525 size 91317, Accumulated background error counts: 1
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: debug -8>
2025-07-20T17:52:21.341+0000 7f359c206640 -1
mon.srvr-ceph-01@0(probing) e5 handle_auth_bad_method hmm, they
didn't like 2 result (13) Permission denied
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: debug -7>
2025-07-20T17:52:21.741+0000 7f359c206640 -1
mon.srvr-ceph-01@0(probing) e5 handle_auth_bad_method hmm, they
didn't like 2 result (13) Permission denied
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: debug -6>
2025-07-20T17:52:21.741+0000 7f359c206640 1
mon.srvr-ceph-01@0(probing) e5 handle_auth_request failed to assign
global_id
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: debug -5>
2025-07-20T17:52:21.749+0000 7f35981fe640 5
mon.srvr-ceph-01@0(probing) e5 _ms_dispatch setting monitor caps on
this connection
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: debug -4>
2025-07-20T17:52:21.749+0000 7f35981fe640 1
mon.srvr-ceph-01@0(synchronizing) e5 sync_obtain_latest_monmap
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: debug -3>
2025-07-20T17:52:21.749+0000 7f35981fe640 1
mon.srvr-ceph-01@0(synchronizing) e5 sync_obtain_latest_monmap
obtained monmap e5
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: [285B blob data]
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: PutCF( prefix = mon_sync key
= 'latest_monmap' value size = 508)
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: PutCF( prefix = mon_sync key
= 'in_sync' value size = 8)
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: PutCF( prefix = mon_sync key
= 'last_committed_floor' value size = 8)
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: debug -1>
2025-07-20T17:52:21.749+0000 7f35981fe640 -1
/home/jenkins-build/build/workspace/ceph-build/ARCH/x86_64/AVAILABLE_ARCH/x86_64/AVAILABLE_DIST/centos9/DIST/centos9/MACHINE_SIZE/gigantic/release/17.2.8/rpm/el9/BUILD/ceph-17.2.8/src/mon/MonitorDBStore.h:
In function 'int
MonitorDBStore::apply_transaction(MonitorDBStore::TransactionRef)'
thread 7f35981fe640 time 2025-07-20T17:52:21.750611+0000
Jul 20 17:52:21 srvr-ceph-01 bash[3424]:
/home/jenkins-build/build/workspace/ceph-build/ARCH/x86_64/AVAILABLE_ARCH/x86_64/AVAILABLE_DIST/centos9/DIST/centos9/MACHINE_SIZE/gigantic/release/17.2.8/rpm/el9/BUILD/ceph-17.2.8/src/mon/MonitorDBStore.h:
355: ceph_abort_msg("failed to write to db")
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: ceph version 17.2.8
(f817ceb7f187defb1d021d6328fa833eb8e943b3) quincy (stable)
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: 1: (ceph::__ceph_abort(char
const*, int, char const*, std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char> > const&)+0xd3)
[0x7f35a03a5469]
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: 2:
/usr/bin/ceph-mon(+0x1e968e) [0x55e079c5768e]
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: 3:
(Monitor::sync_start(entity_addrvec_t&, bool)+0x3b5) [0x55e079c8a145]
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: 4:
(Monitor::handle_probe_reply(boost::intrusive_ptr<MonOpRequest>)+0x83f)
[0x55e079c90baf]
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: 5:
(Monitor::handle_probe(boost::intrusive_ptr<MonOpRequest>)+0x36c)
[0x55e079c925dc]
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: 6:
(Monitor::dispatch_op(boost::intrusive_ptr<MonOpRequest>)+0x112d)
[0x55e079cad20d]
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: 7:
(Monitor::_ms_dispatch(Message*)+0x7c9) [0x55e079cadd89]
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: 8:
/usr/bin/ceph-mon(+0x1f6d3e) [0x55e079c64d3e]
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: 9:
(DispatchQueue::entry()+0x53a) [0x7f35a058d34a]
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: 10:
/usr/lib64/ceph/libceph-common.so.2(+0x3bdea1) [0x7f35a061eea1]
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: 11:
/lib64/libc.so.6(+0x89e92) [0x7f359fb6ce92]
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: 12:
/lib64/libc.so.6(+0x10ef20) [0x7f359fbf1f20]
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: debug 0>
2025-07-20T17:52:21.749+0000 7f35981fe640 -1 *** Caught signal
(Aborted) **
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: in thread 7f35981fe640
thread_name:ms_dispatch
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: ceph version 17.2.8
(f817ceb7f187defb1d021d6328fa833eb8e943b3) quincy (stable)
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: 1:
/lib64/libc.so.6(+0x3e730) [0x7f359fb21730]
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: 2:
/lib64/libc.so.6(+0x8bbdc) [0x7f359fb6ebdc]
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: 3: raise()
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: 4: abort()
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: 5: (ceph::__ceph_abort(char
const*, int, char const*, std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char> > const&)+0x190)
[0x7f35a03a5526]
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: 6:
/usr/bin/ceph-mon(+0x1e968e) [0x55e079c5768e]
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: 7:
(Monitor::sync_start(entity_addrvec_t&, bool)+0x3b5) [0x55e079c8a145]
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: 8:
(Monitor::handle_probe_reply(boost::intrusive_ptr<MonOpRequest>)+0x83f)
[0x55e079c90baf]
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: 9:
(Monitor::handle_probe(boost::intrusive_ptr<MonOpRequest>)+0x36c)
[0x55e079c925dc]
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: 10:
(Monitor::dispatch_op(boost::intrusive_ptr<MonOpRequest>)+0x112d)
[0x55e079cad20d]
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: 11:
(Monitor::_ms_dispatch(Message*)+0x7c9) [0x55e079cadd89]
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: 12:
/usr/bin/ceph-mon(+0x1f6d3e) [0x55e079c64d3e]
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: 13:
(DispatchQueue::entry()+0x53a) [0x7f35a058d34a]
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: 14:
/usr/lib64/ceph/libceph-common.so.2(+0x3bdea1) [0x7f35a061eea1]
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: 15:
/lib64/libc.so.6(+0x89e92) [0x7f359fb6ce92]
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: 16:
/lib64/libc.so.6(+0x10ef20) [0x7f359fbf1f20]
Jul 20 17:52:21 srvr-ceph-01 bash[3424]: NOTE: a copy of the
executable, or `objdump -rdS <executable>` is needed to interpret this.
I do not know if the logs are purged from sensitive data that would
prevent emailing them. looking for "checksum mismatch", in the logs,
there are many of them (138).
How can I fix this checksum issue?
Regards,
S. Barthes
Le 21/07/2025 à 09:59, Michel Jouvin a écrit :
Stéphane,
On ceph-02, I am not sure why the ceph command is not installed as
on the other nodes, if you installed it the same way. One way to get
access to the ceph command on this server should be to execute:
cephadm shell
This will start a container where you have the ceph environment
installed and configured for your cluster.
The situation is not as bad as I thought reading your first message.
You have the mon quorum so at least ceph command should be usable.
The first thing to do is probably to log on your ceph-01 node and
try to understand why the mon daemon is crashing. You may want to
run on this node:
cephadm ls ---> Look for the exact daemon name corresponding to the
mon
cephadm logs --daemon $daemon_name
Apart from this, it is strange that ceph-03 report a RADOS error
with 'ceph log last...', this probably hides another issue. Could
you tell what the same command says on ceph-02 (when run in cephadm
shell)?
Michel
Le 21/07/2025 à 09:44, Stéphane Barthes a écrit :
Michel,
I ran "ceph log last debug cephadm" on my 3 nodes, and "mileage
varies"
ceph-01 :
some errors, and it ends with
2025-07-20T03:24:18.887889+0000 mgr.srvr-ceph-03.dhzbpe
(mgr.134360) 1368 : cephadm [INF] Deploying daemon mon.srvr-ceph-03
on srvr-ceph-03
when I had to remove the mon daemon and redeploy on ceph-03.
ceph-02 :
root@srvr-ceph-02:~# ceph log last debug cephadm
Command 'ceph' not found, but can be installed with:
snap install microceph # version 18.2.4+snapc9f2b08f92, or
apt install ceph-common # version 17.2.7-0ubuntu0.22.04.2
See 'snap info microceph' for additional versions.
??? should I install ceph-common ???
ceph-03 :
root@srvr-ceph-03:~# ceph log last debug cephadm
Error initializing cluster client: ObjectNotFound('RADOS object not
found (error calling conf_read_file)')
root@srvr-ceph-03:~#
FWIW : ceph health is :
root@srvr-ceph-01:~# ceph health detail
HEALTH_WARN 1 failed cephadm daemon(s); 1/3 mons down, quorum
srvr-ceph-03,srvr-ceph-02; 10 daemons have recently crashed
[WRN] CEPHADM_FAILED_DAEMON: 1 failed cephadm daemon(s)
daemon mon.srvr-ceph-01 on srvr-ceph-01 is in error state
[WRN] MON_DOWN: 1/3 mons down, quorum srvr-ceph-03,srvr-ceph-02
mon.srvr-ceph-01 (rank 0) addr
[v2:10.32.100.22:3300/0,v1:10.32.100.22:6789/0] is down (out of
quorum)
[WRN] RECENT_CRASH: 10 daemons have recently crashed
mon.srvr-ceph-01 crashed on host srvr-ceph-01 at
2025-07-20T17:50:10.202091Z
mon.srvr-ceph-01 crashed on host srvr-ceph-01 at
2025-07-20T17:49:47.712267Z
mon.srvr-ceph-01 crashed on host srvr-ceph-01 at
2025-07-20T17:50:21.464475Z
mon.srvr-ceph-01 crashed on host srvr-ceph-01 at
2025-07-20T17:49:36.609442Z
mon.srvr-ceph-01 crashed on host srvr-ceph-01 at
2025-07-20T17:49:58.966663Z
mon.srvr-ceph-01 crashed on host srvr-ceph-01 at
2025-07-20T17:51:36.947240Z
mon.srvr-ceph-01 crashed on host srvr-ceph-01 at
2025-07-20T17:52:21.751711Z
mon.srvr-ceph-01 crashed on host srvr-ceph-01 at
2025-07-20T17:51:48.490875Z
mon.srvr-ceph-01 crashed on host srvr-ceph-01 at
2025-07-20T17:51:59.651129Z
mon.srvr-ceph-01 crashed on host srvr-ceph-01 at
2025-07-20T17:52:10.552756Z
S. Barthes
Le 21/07/2025 à 09:31, Michel Jouvin a écrit :
Stephane,
If you are using cephadm, the OS (distrib and version) you use
should not matter. When using cephadm with several servers (the
general case!), it is important to setup properly the SSH key used
by cephadm for the communication between nodes (cephadm is sort of
a SSH-based management cluster) and to check that you can log in
from one node to the other using SSH. Can you confirm that it is
the case?
Also cephadm has a specific log file. I don't use much the
dashboard, not sure how you display it (it may be part of the logs
displayed by the dashboard) but you can access it with the command:
ceph log last debug cephadm
Michel
Le 21/07/2025 à 09:19, Stéphane Barthes a écrit :
Hi,
Yes, I did use cephadm, to bootstrap the 1st node in the cluster,
installed cephadm on the other nodes, and used the dashboard to
add the nodes to the cluster.
Regards,
S. Barthes
Le 21/07/2025 à 09:12, Michel Jouvin a écrit :
Hi Stephane,
How did you configure your cluster? Have you been using cephadm?
If not, I really advise you to recreate your cluster with
cephadm, that includes a script to bootstrap the cluster. In
particular if you don't have a detail knowledge about Ceph
architecture and management, it will ensure that your cluster is
properly configured and let you progressively learn about Ceph
details...
Best regards.
Michel
Le 21/07/2025 à 09:02, Stéphane Barthes a écrit :
Hello,
I am very new to ceph and have started a small cluster to get
started with ceph.
But so far my experience, is not very impressive, probably by
lack of knowledge and good practices.
I started with Ubuntu 24, installed 3 VM for a ceph cluster,
and some how could not get it running. Adding nodes would fail
adding OSDs with some weird error(I found it on the web but
could not solve the problem).
I then made a new cluster with 3 ubuntu 22 VM. Install ok,
start ok, I created 1 pool to test storing stuff there and work
my way across crash testing. However the cluster dies during
the weekly vm snapshot. It may not a good idea to run vm
backups on a ceph host, but I find this a little surprising.
(crash testing started earlier than expected)
Bottom line is that, after the backup the cluster is in warning
state with missing mons, or logrotate and sometimes crashed
machines. systemctl restart service or Rebooting node usually
fixes it.
I am now stuck in a situation I cannot fix :
- 1 Machine is ceph rbd client cannot auth : auth method
'x' error -13. I have tried quite a few things, and none
unlocked the situation. I am currently trying to reboot the
machine, but the busy/stuck rbd device seems to block it. I am
not looking forward to hard reset it.
- Node with the mgr service will not restart mon, or
logrotate. I did reboot it again today, but I guess this is not
how a node is expected to behave.
So my questions :
- How can I unlock my stuck ceph client, when this kind of
error occurs?
- Is this expected behavior that client looses access to
cluster, which kind of kills the machine?
- Where should I look in the ceph nodes logs to figure what
is going wrong, and how to fix it, so that is run in a stable
manner?
Regards,
--
S. Barthes
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