Hello everybody! I am fascinated by Ceph, but now I live in moments of
terror and despair. I'm using ceph 18.2.2 (reef) and at the moment We need
to import 4 OSDs from an old cluster (which was removed by accident).
In short, we suspect that the cause and solution for this case lies in the
information in the OSD log below: (all OSD daemons repeat the same
information)
After importing I receive the following information in the "journalctl -u
ceph-osd@2" log:
---
Jul 17 20:09:55 pxm3 ceph-osd[647313]: in thread 702342c006c0
thread_name:ms_dispatch
Jul 17 20:09:55 pxm3 ceph-osd[647313]: ceph version 18.2.2
(e9fe820e7fffd1b7cde143a9f77653b73fcec748) reef (stable)
Jul 17 20:09:55 pxm3 ceph-osd[647313]: 1:
/lib/x86_64-linux-gnu/libc.so.6(+0x3c050) [0x70235785b050]
Jul 17 20:09:55 pxm3 ceph-osd[647313]: 2:
/lib/x86_64-linux-gnu/libc.so.6(+0x8ae2c) [0x7023578a9e2c]
Jul 17 20:09:55 pxm3 ceph-osd[647313]: 3: gsignal()
Jul 17 20:09:55 pxm3 ceph-osd[647313]: 4: abort()
Jul 17 20:09:55 pxm3 ceph-osd[647313]: 5: (ceph::__ceph_abort(char const*,
int, char const*, std::__cxx11::basic_string<char, std::char_traits<char>,
std::allocator<char> > const&)+0x18a) [0x62edaeab47>
Jul 17 20:09:55 pxm3 ceph-osd[647313]: 6:
(OSD::handle_osd_map(MOSDMap*)+0x384a) [0x62edaec0aeca]
Jul 17 20:09:55 pxm3 ceph-osd[647313]: 7:
(OSD::ms_dispatch(Message*)+0x62) [0x62edaec0b332]
Jul 17 20:09:55 pxm3 ceph-osd[647313]: 8:
(Messenger::ms_deliver_dispatch(boost::intrusive_ptr<Message> const&)+0xc1)
[0x62edaf5eea51]
Jul 17 20:09:55 pxm3 ceph-osd[647313]: 9: (DispatchQueue::entry()+0x6cf)
[0x62edaf5ed53f]
Jul 17 20:09:55 pxm3 ceph-osd[647313]: 10:
(DispatchQueue::DispatchThread::entry()+0xd) [0x62edaf40fd5d]
Jul 17 20:09:55 pxm3 ceph-osd[647313]: 11:
/lib/x86_64-linux-gnu/libc.so.6(+0x89134) [0x7023578a8134]
Jul 17 20:09:55 pxm3 ceph-osd[647313]: 12:
/lib/x86_64-linux-gnu/libc.so.6(+0x1097dc) [0x7023579287dc]
Jul 17 20:09:55 pxm3 ceph-osd[647313]: NOTE: a copy of the executable, or
`objdump -rdS <executable>` is needed to interpret this.
Jul 17 20:09:55 pxm3 ceph-osd[647313]: -142> 2024-07-17T20:09:54.845-0300
702356d616c0 -1 osd.2 71 log_to_monitors true
Jul 17 20:09:55 pxm3 ceph-osd[647313]: -2> 2024-07-17T20:09:55.362-0300
702342c006c0 -1 osd.2 71 ERROR: bad fsid? i have
5514a69a-46ba-4a44-bb56-8d3109c6c9e0 and inc has
f4466e33-b57d-4d68-9909-346>
Jul 17 20:09:55 pxm3 ceph-osd[647313]: -1> 2024-07-17T20:09:55.366-0300
702342c006c0 -1 ./src/osd/OSD.cc: In function 'void
OSD::handle_osd_map(MOSDMap*)' thread 702342c006c0 time 2024-07-17T20:09:5>
Jul 17 20:09:55 pxm3 ceph-osd[647313]: ./src/osd/OSD.cc: 8098:
ceph_abort_msg("bad fsid")
Jul 17 20:09:55 pxm3 ceph-osd[647313]: ceph version 18.2.2
(e9fe820e7fffd1b7cde143a9f77653b73fcec748) reef (stable)
---
Above in the OSDs daemon log, we see the "bad fsid" error which indicates
that the OSDs are trying to connect to a different Ceph cluster than the
one they were initially configured for. Each Ceph cluster has a unique
identifier, the FSID, and if the OSDs detect a different FSID, they cannot
connect correctly.
Note: I believe this is the root cause of the problem and the solution.
Problem: OSD has fsid from the old cluster.
This would be the solution, change the ceph_fsid (fsid) of the OSDs to the
fsid of the new cluster, or recreate a new cluster using the fsid that is
recorded in the OSD metadata, that is, recreate the cluster with the fsid
of the old cluster? would it be possible?)
I also opened a topic for this case on the proxmox forum and inserted a lot
of data about this scenario there:
https://forum.proxmox.com/threads/ceph-cluster-rebuild-import-bluestore-osds-from-old-cluster-bad-fsid-osd-dont-start-he-only-stays-in-down-state.151349/
-----
~# cat /etc/ceph/ceph.conf
[global]
auth_client_required = cephx
auth_cluster_required = cephx
auth_service_required = cephx
cluster_network = 192.168.0.2/24
fsid = f4466e33-b57d-4d68-9909-3468afd9e5c2
mon_allow_pool_delete = true
mon_host = 192.168.0.2 192.168.0.3 192.168.0.1
ms_bind_ipv4 = true
ms_bind_ipv6 = false
osd_pool_default_min_size = 2
osd_pool_default_size = 3
public_network = 192.168.0.0/24
[client]
# keyring = /etc/pve/priv/$cluster.$name.keyring
keyring = /etc/pve/priv/ceph.client.admin.keyring
#[client.crash]
# keyring = /etc/pve/ceph/$cluster.$name.keyring
[client.crash]
key = AQAl95NmlvL0HRAAovpivsfHqqokmO0vqIR5Lg==
[client.admin]
key = AQAk95NmSjMdORAAiAHkTSSMquKkBAGpALjwQA==
caps mds = "allow *"
caps mgr = "allow *"
caps mon = "allow *"
caps osd = "allow *"
[mon.pxm1]
public_addr = 192.168.0.1
[mon.pxm2]
public_addr = 192.168.0.2
[mon.pxm3]
public_addr = 192.168.0.3
---
root@pxm3:~# ceph fsid
f4466e33-b57d-4d68-9909-3468afd9e5c2
---
~# ceph -s
cluster:
id: f4466e33-b57d-4d68-9909-3468afd9e5c2
health: HEALTH_WARN
mon pxm1 is low on available space
4 osds down
2 hosts (4 osds) down
1 root (4 osds) down
170 daemons have recently crashed
services:
mon: 3 daemons, quorum pxm2,pxm3,pxm1 (age 3h)
mgr: pxm2(active, since 3h), standbys: pxm1, pxm3
osd: 4 osds: 0 up, 4 in (since 2h)
data:
pools: 0 pools, 0 pgs
objects: 0 objects, 0 B
usage: 0 B used, 0 B / 0 B avail
pgs:
---
~# cephadm ls
[
{
"style": "legacy",
"name": "osd.0",
"fsid": "5514a69a-46ba-4a44-bb56-8d3109c6c9e0",
"systemd_unit": "ceph-osd@0",
"enabled": true,
"state": "error",
"host_version": "18.2.2"
},
{
"style": "legacy",
"name": "osd.1",
"fsid": "5514a69a-46ba-4a44-bb56-8d3109c6c9e0",
"systemd_unit": "ceph-osd@1",
"enabled": true,
"state": "error",
"host_version": "18.2.2"
},
{
"style": "legacy",
"name": "mon.pxm2",
"fsid": "f4466e33-b57d-4d68-9909-3468afd9e5c2",
"systemd_unit": "ceph-mon@pxm2",
"enabled": true,
"state": "running",
"host_version": "18.2.2"
},
{
"style": "legacy",
"name": "mgr.pxm2",
"fsid": "f4466e33-b57d-4d68-9909-3468afd9e5c2",
"systemd_unit": "ceph-mgr@pxm2",
"enabled": true,
"state": "running",
"host_version": "18.2.2"
}
]
root@pxm3:~# cephadm ls
[
{
"style": "legacy",
"name": "osd.3",
"fsid": "5514a69a-46ba-4a44-bb56-8d3109c6c9e0",
"systemd_unit": "ceph-osd@3",
"enabled": true,
"state": "error",
"host_version": "18.2.2"
},
{
"style": "legacy",
"name": "osd.2",
"fsid": "5514a69a-46ba-4a44-bb56-8d3109c6c9e0",
"systemd_unit": "ceph-osd@2",
"enabled": true,
"state": "error",
"host_version": "18.2.2"
},
{
"style": "legacy",
"name": "mon.pxm3",
"fsid": "f4466e33-b57d-4d68-9909-3468afd9e5c2",
"systemd_unit": "ceph-mon@pxm3",
"enabled": true,
"state": "running",
"host_version": "18.2.2"
},
{
"style": "legacy",
"name": "mgr.pxm3",
"fsid": "f4466e33-b57d-4d68-9909-3468afd9e5c2",
"systemd_unit": "ceph-mgr@pxm3",
"enabled": true,
"state": "running",
"host_version": "18.2.2"
}
]
---
To import the OSDs, we first increased the epoch of the new cluster,
repeating the commands below until the cluster's epoch count number was
greater than the OSDs' epoch number:
Bash:
ceph osd set noin
ceph osd set noout
ceph osd set noup
ceph osd set nodown
ceph osd set norebalance
ceph osd set nobackfill
ceph osd unset noin
ceph osd unset noout
ceph osd unset noup
ceph osd unset nodown
ceph osd unset norebalance
ceph osd unset nobackfill
---
OSD volumes:
Code:
pxm2:
-> OSD.0:
/dev/ceph-1740d41a-2ae7-4c4d-820f-ec3702e3ba90/osd-block-39f9b32f-c6e7-4b3f-b7f0-9b11a5832aaa
-> OSD.1:
/dev/ceph-ad425d70-4aa3-419a-997f-f3a4082c9904/osd-block-bb4df480-2b9b-4604-a44d-6151d5c0cb33
pxm3:
-> OSD.2:
/dev/ceph-94682b88-d09c-4eab-9170-c6d31eac79e6/osd-block-3f6756d6-e64b-4c60-9ac2-305c0e71cc51
-> OSD.3:
/dev/ceph-d5ffd027-8289-4a1c-9378-6687d9f950ad/osd-block-eece9fc9-44d6-460b-aced-572c79a98be8
---
ceph-bluestore-tool show-label:
-> osb.0:
Bash:
root@pxm2:~# ceph-bluestore-tool show-label --path /var/lib/ceph/osd/ceph-0
inferring bluefs devices from bluestore path
{
"/var/lib/ceph/osd/ceph-0/block": {
"osd_uuid": "39f9b32f-c6e7-4b3f-b7f0-9b11a5832aaa",
"size": 2000397795328,
"btime": "2024-07-07T21:32:30.861509-0300",
"description": "main",
"bfm_blocks": "488378368",
"bfm_blocks_per_key": "128",
"bfm_bytes_per_block": "4096",
"bfm_size": "2000397795328",
"bluefs": "1",
"ceph_fsid": "5514a69a-46ba-4a44-bb56-8d3109c6c9e0",
"ceph_version_when_created": "ceph version 18.2.2
(e9fe820e7fffd1b7cde143a9f77653b73fcec748) reef (stable)",
"created_at": "2024-07-08T00:32:32.459102Z",
"kv_backend": "rocksdb",
"magic": "ceph osd volume v026",
"mkfs_done": "yes",
"osd_key": "AQCdM4tmHR5tLRAA5AikqvQyMqOoH5MnL8Qdtg==",
"ready": "ready",
"require_osd_release": "18",
"whoami": "0"
}
}
-> osd.1:
Bash:
root@pxm2:~# ceph-bluestore-tool show-label --path /var/lib/ceph/osd/ceph-1
inferring bluefs devices from bluestore path
{
"/var/lib/ceph/osd/ceph-1/block": {
"osd_uuid": "bb4df480-2b9b-4604-a44d-6151d5c0cb33",
"size": 2000397795328,
"btime": "2024-07-07T21:32:43.729638-0300",
"description": "main",
"bfm_blocks": "488378368",
"bfm_blocks_per_key": "128",
"bfm_bytes_per_block": "4096",
"bfm_size": "2000397795328",
"bluefs": "1",
"ceph_fsid": "5514a69a-46ba-4a44-bb56-8d3109c6c9e0",
"ceph_version_when_created": "ceph version 18.2.2
(e9fe820e7fffd1b7cde143a9f77653b73fcec748) reef (stable)",
"created_at": "2024-07-08T00:32:45.577456Z",
"kv_backend": "rocksdb",
"magic": "ceph osd volume v026",
"mkfs_done": "yes",
"osd_key": "AQCqM4tmTy87JxAAJVK1NokBDjdKSe+Z8OjwMA==",
"ready": "ready",
"require_osd_release": "18",
"whoami": "1"
}
}
-> osd.2
Bash:
root@pxm3:~# ceph-bluestore-tool show-label --path /var/lib/ceph/osd/ceph-2
inferring bluefs devices from bluestore path
{
"/var/lib/ceph/osd/ceph-2/block": {
"osd_uuid": "3f6756d6-e64b-4c60-9ac2-305c0e71cc51",
"size": 2000397795328,
"btime": "2024-07-07T21:33:07.812888-0300",
"description": "main",
"bfm_blocks": "488378368",
"bfm_blocks_per_key": "128",
"bfm_bytes_per_block": "4096",
"bfm_size": "2000397795328",
"bluefs": "1",
"ceph_fsid": "5514a69a-46ba-4a44-bb56-8d3109c6c9e0",
"ceph_version_when_created": "ceph version 18.2.2
(e9fe820e7fffd1b7cde143a9f77653b73fcec748) reef (stable)",
"created_at": "2024-07-08T00:33:09.404317Z",
"kv_backend": "rocksdb",
"magic": "ceph osd volume v026",
"mkfs_done": "yes",
"osd_key": "AQDCM4tmu++vLRAAuJOXjTuEHR9VsKz7ShVEPg==",
"ready": "ready",
"require_osd_release": "18",
"whoami": "2"
}
}
-> osd.3
Bash:
root@pxm3:~# ceph-bluestore-tool show-label --path /var/lib/ceph/osd/ceph-3
inferring bluefs devices from bluestore path
{
"/var/lib/ceph/osd/ceph-3/block": {
"osd_uuid": "eece9fc9-44d6-460b-aced-572c79a98be8",
"size": 2000397795328,
"btime": "2024-07-07T21:33:25.725294-0300",
"description": "main",
"bfm_blocks": "488378368",
"bfm_blocks_per_key": "128",
"bfm_bytes_per_block": "4096",
"bfm_size": "2000397795328",
"bluefs": "1",
"ceph_fsid": "5514a69a-46ba-4a44-bb56-8d3109c6c9e0",
"ceph_version_when_created": "ceph version 18.2.2
(e9fe820e7fffd1b7cde143a9f77653b73fcec748) reef (stable)",
"created_at": "2024-07-08T00:33:27.323085Z",
"kv_backend": "rocksdb",
"magic": "ceph osd volume v026",
"mkfs_done": "yes",
"osd_key": "AQDUM4tmagOEKBAAeAfZXcyU1naRkqIE5iVOfw==",
"ready": "ready",
"require_osd_release": "18",
"whoami": "3"
}
}
---
root@pxm2:~# cat /var/lib/ceph/osd/ceph-0/ceph_fsid
5514a69a-46ba-4a44-bb56-8d3109c6c9e0
root@pxm2:~# cat /var/lib/ceph/osd/ceph-1/ceph_fsid
5514a69a-46ba-4a44-bb56-8d3109c6c9e0
root@pxm3:~# cat /var/lib/ceph/osd/ceph-2/ceph_fsid
5514a69a-46ba-4a44-bb56-8d3109c6c9e0
root@pxm3:~# cat /var/lib/ceph/osd/ceph-3/ceph_fsid
5514a69a-46ba-4a44-bb56-8d3109c6c9e0
---
~# ceph daemon osd.0 status
no valid command found; 10 closest matches:
0
1
2
abort
assert
bluefs debug_inject_read_zeros
bluefs files list
bluefs stats
bluestore allocator dump block
bluestore allocator fragmentation block
admin_socket: invalid command
---
~# ceph osd info osd.0
osd.0 down in weight 1 up_from 0 up_thru 0 down_at 0 last_clean_interval
[0,0) exists 39f9b32f-c6e7-4b3f-b7f0-9b11a5832aaa
---
~# ceph osd status
ID HOST USED AVAIL WR OPS WR DATA RD OPS RD DATA STATE
0 0 0 0 0 0 0 exists
1 0 0 0 0 0 0 exists
2 0 0 0 0 0 0 exists
3 0 0 0 0 0 0 exists
root@pxm3:~# ceph osd tree
ID CLASS WEIGHT TYPE NAME STATUS REWEIGHT PRI-AFF
-1 7.27759 root default
-2 3.63879 host pxm2
0 1.81940 osd.0 down 1.00000 1.00000
1 1.81940 osd.1 down 1.00000 1.00000
-5 3.63879 host pxm3
3 1.81940 osd.3 down 1.00000 1.00000
2 ssd 1.81940 osd.2 down 1.00000 1.00000
---
~# ceph osd dump
epoch 164
fsid f4466e33-b57d-4d68-9909-3468afd9e5c2
created 2024-07-14T13:04:53.354056-0300
modified 2024-07-17T20:24:17.550123-0300
flags sortbitwise,recovery_deletes,purged_snapdirs,pglog_hardlimit
crush_version 63
full_ratio 0.95
backfillfull_ratio 0.9
nearfull_ratio 0.85
require_min_compat_client luminous
min_compat_client jewel
require_osd_release reef
stretch_mode_enabled false
max_osd 4
osd.0 down in weight 1 up_from 0 up_thru 0 down_at 0 last_clean_interval
[0,0) exists 39f9b32f-c6e7-4b3f-b7f0-9b11a5832aaa
osd.1 down in weight 1 up_from 0 up_thru 0 down_at 0 last_clean_interval
[0,0) exists bb4df480-2b9b-4604-a44d-6151d5c0cb33
osd.2 down in weight 1 up_from 0 up_thru 0 down_at 0 last_clean_interval
[0,0) exists 3f6756d6-e64b-4c60-9ac2-305c0e71cc51
osd.3 down in weight 1 up_from 0 up_thru 0 down_at 0 last_clean_interval
[0,0) exists eece9fc9-44d6-460b-aced-572c79a98be8
blocklist 192.168.0.1:0/1377959162 expires 2024-07-18T17:16:21.635340-0300
blocklist 192.168.0.1:6800/49511 expires 2024-07-18T17:16:21.635340-0300
blocklist 192.168.0.1:0/3150227222 expires 2024-07-18T17:16:21.635340-0300
blocklist 192.168.0.2:0/1759809784 expires 2024-07-18T00:56:24.333969-0300
blocklist 192.168.0.1:0/3747372149 expires 2024-07-18T17:16:21.635340-0300
blocklist 192.168.0.1:6801/49511 expires 2024-07-18T17:16:21.635340-0300
blocklist 192.168.0.2:0/1472036822 expires 2024-07-18T00:56:24.333969-0300
blocklist 192.168.0.2:0/571633622 expires 2024-07-18T00:56:24.333969-0300
blocklist 192.168.0.2:6801/10543 expires 2024-07-18T00:56:24.333969-0300
blocklist 192.168.0.2:6800/10543 expires 2024-07-18T00:56:24.333969-0300
---
~# ceph osd metadata
[
{
"id": 0
},
{
"id": 1
},
{
"id": 2
},
{
"id": 3
}
]
---
~# cat /var/lib/ceph/osd/ceph-0/keyring
[osd.0]
key = AQCdM4tmHR5tLRAA5AikqvQyMqOoH5MnL8Qdtg==
root@pxm2:~# cat /var/lib/ceph/osd/ceph-1/keyring
[osd.1]
key = AQCqM4tmTy87JxAAJVK1NokBDjdKSe+Z8OjwMA==
root@pxm3:~# cat /var/lib/ceph/osd/ceph-2/keyring
[osd.2]
key = AQDCM4tmu++vLRAAuJOXjTuEHR9VsKz7ShVEPg==
root@pxm3:~# cat /var/lib/ceph/osd/ceph-3/keyring
[osd.3]
key = AQDUM4tmagOEKBAAeAfZXcyU1naRkqIE5iVOfw==
---
~# ceph auth list
osd.0
key: AQCKQJhmMYWeEhAAosrE8Ff+1kZbKcroi22TvQ==
caps: [mon] allow profile osd
caps: [osd] allow *
osd.1
key: AQCTQJhm2uLvAxAAC3uIcRk9d0sxLJgIxcivtw==
caps: [mon] allow profile osd
caps: [osd] allow *
osd.2
key: AQDCM4tmu++vLRAAuJOXjTuEHR9VsKz7ShVEPg==
caps: [mon] allow profile osd
caps: [osd] allow *
osd.3
key: AQBYMZhmmlaFDRAAtoy4//XweaI94OvrPV1aiQ==
caps: [mon] allow profile osd
caps: [osd] allow *
client.admin
key: AQAk95NmSjMdORAAiAHkTSSMquKkBAGpALjwQA==
caps: [mds] allow *
caps: [mgr] allow *
caps: [mon] allow *
caps: [osd] allow *
client.bootstrap-mds
key: AQAl95NmWuofFRAAhV7/f1PykW/KlcB8Rede9w==
caps: [mon] allow profile bootstrap-mds
client.bootstrap-mgr
key: AQAl95NmmPQfFRAAG2cQNiWQgdx0Rvr7ZFmuhg==
caps: [mon] allow profile bootstrap-mgr
client.bootstrap-osd
key: AQAl95Nmr/0fFRAA4TahG5PCbZIsltFgkRNEgA==
caps: [mon] allow profile bootstrap-osd
client.bootstrap-rbd
key: AQAl95Nm0gYgFRAAWBvqfphKk62InqY9x0ijHg==
caps: [mon] allow profile bootstrap-rbd
client.bootstrap-rbd-mirror
key: AQAl95Nmxg8gFRAAomFkp299Ca04NwGpfbSZRg==
caps: [mon] allow profile bootstrap-rbd-mirror
client.bootstrap-rgw
key: AQAl95Nm3RwgFRAA/QoIemXPFv5Gs1/PWfJuYw==
caps: [mon] allow profile bootstrap-rgw
client.crash
key: AQAl95NmlvL0HRAAovpivsfHqqokmO0vqIR5Lg==
caps: [mgr] profile crash
caps: [mon] profile crash
mgr.pxm1
key: AQDm+JNmtJ3CCRAAl/wZaT6z12LCfAghvm6s4w==
caps: [mds] allow *
caps: [mon] allow profile mgr
caps: [osd] allow *
mgr.pxm2
key: AQAm95Nm6+dmABAA6405D8ROtNpJf6iVhMegQA==
caps: [mds] allow *
caps: [mon] allow profile mgr
caps: [osd] allow *
mgr.pxm3
key: AQDp95Nm3ZbLDxAAWc1zLaVOhE0wMxLJCL5IGg==
caps: [mds] allow *
caps: [mon] allow profile mgr
caps: [osd] allow *
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