Just want to point out as well that the first thing I did when noticing this
bug was to add the `ceph` user to the group `disk` thus giving it write
permission to the devices. However this did not actually work (haven't checked
in 12.2.2 yet), and I suspect that something in the ceph code was checking
whether the devices are owned by ceph:ceph. I did not have time to hunt that
down though.
________________________________
From: ceph-users <ceph-users-boun...@lists.ceph.com> on behalf of Linh Vu
<v...@unimelb.edu.au>
Sent: Thursday, 4 January 2018 11:46:40 AM
To: Sergey Malinin; Steven Vacaroaia
Cc: ceph-users
Subject: Re: [ceph-users] ceph luminous - SSD partitions disssapeared
Seen this issue when I first created our Luminous cluster. I use a custom
systemd service to chown the DB and WAL partitions before ceph osd services get
started. The script in /usr/local/sbin just does the chowning.
ceph-nvme.service:
# This is a workaround to chown the rocksdb and wal partitions
# for ceph-osd on nvme, because ceph-disk currently does not
# chown them to ceph:ceph so OSDs can't come up at OS startup
[Unit]
Description=Chown rocksdb and wal partitions on NVMe workaround
ConditionFileIsExecutable=/usr/local/sbin/ceph-nvme.sh
After=local-fs.target
[Service]
Type=oneshot
ExecStart=/usr/local/sbin/ceph-nvme.sh
TimeoutSec=0
[Install]
WantedBy=multi-user.target
________________________________
From: ceph-users <ceph-users-boun...@lists.ceph.com> on behalf of Sergey
Malinin <h...@newmail.com>
Sent: Thursday, 4 January 2018 10:56:13 AM
To: Steven Vacaroaia
Cc: ceph-users
Subject: Re: [ceph-users] ceph luminous - SSD partitions disssapeared
To make device ownership persist over reboots, you can to set up udev rules.
The article you referenced seems to have nothing to do with bluestore. When you
had zapped /dev/sda, you zapped bluestore metadata stored on db partition so
newly created partitions, if they were created apart from block storage, are no
longer relevant and that’s why osd daemon throws error.
________________________________
From: Steven Vacaroaia <ste...@gmail.com>
Sent: Wednesday, January 3, 2018 7:20:12 PM
To: Sergey Malinin
Cc: ceph-users
Subject: Re: [ceph-users] ceph luminous - SSD partitions disssapeared
They were not
After I change it manually I was still unable to start the service
Further more, a reboot screed up permissions again
ls -al /dev/sda*
brw-rw---- 1 root disk 8, 0 Jan 3 11:10 /dev/sda
brw-rw---- 1 root disk 8, 1 Jan 3 11:10 /dev/sda1
brw-rw---- 1 root disk 8, 2 Jan 3 11:10 /dev/sda2
[root@osd01 ~]# chown ceph:ceph /dev/sda1
[root@osd01 ~]# chown ceph:ceph /dev/sda2
[root@osd01 ~]# ls -al /dev/sda*
brw-rw---- 1 root disk 8, 0 Jan 3 11:10 /dev/sda
brw-rw---- 1 ceph ceph 8, 1 Jan 3 11:10 /dev/sda1
brw-rw---- 1 ceph ceph 8, 2 Jan 3 11:10 /dev/sda2
[root@osd01 ~]# systemctl start ceph-osd@3
[root@osd01 ~]# systemctl status ceph-osd@3
● ceph-osd@3.service - Ceph object storage daemon osd.3
Loaded: loaded (/usr/lib/systemd/system/ceph-osd@.service; enabled-runtime;
vendor preset: disabled)
Active: activating (auto-restart) (Result: exit-code) since Wed 2018-01-03
11:18:09 EST; 5s ago
Process: 3823 ExecStart=/usr/bin/ceph-osd -f --cluster ${CLUSTER} --id %i
--setuser ceph --setgroup ceph (code=exited, status=1/FAILURE)
Process: 3818 ExecStartPre=/usr/lib/ceph/ceph-osd-prestart.sh --cluster
${CLUSTER} --id %i (code=exited, status=0/SUCCESS)
Main PID: 3823 (code=exited, status=1/FAILURE)
Jan 03 11:18:09 osd01.tor.medavail.net<http://osd01.tor.medavail.net>
systemd[1]: Unit ceph-osd@3.service entered failed state.
Jan 03 11:18:09 osd01.tor.medavail.net<http://osd01.tor.medavail.net>
systemd[1]: ceph-osd@3.service failed.
ceph-osd[3823]: 2018-01-03 11:18:08.515687 7fa55aec8d00 -1
bluestore(/var/lib/ceph/osd/ceph-3/block.db) _read_bdev_label unable to decode
label at offset 102: buffer::malformed_input: void bluesto
ceph-osd[3823]: 2018-01-03 11:18:08.515710 7fa55aec8d00 -1
bluestore(/var/lib/ceph/osd/ceph-3) _open_db check block
device(/var/lib/ceph/osd/ceph-3/block.db) label returned: (22) Invalid argument
This is very odd as the server was working fine
What is the proper procedure for replacing a failed SSD drive used by Blustore
?
On 3 January 2018 at 10:23, Sergey Malinin
<h...@newmail.com<mailto:h...@newmail.com>> wrote:
Are actual devices (not only udev links) owned by user “ceph”?
________________________________
From: ceph-users
<ceph-users-boun...@lists.ceph.com<mailto:ceph-users-boun...@lists.ceph.com>>
on behalf of Steven Vacaroaia <ste...@gmail.com<mailto:ste...@gmail.com>>
Sent: Wednesday, January 3, 2018 6:19:45 PM
To: ceph-users
Subject: [ceph-users] ceph luminous - SSD partitions disssapeared
Hi,
After a reboot, all the partitions created on the SSD drive dissapeared
They were used by bluestore DB and WAL so the OSD are down
The following error message are in /var/log/messages
Jan 3 09:54:12 osd01 ceph-osd: 2018-01-03 09:54:12.992218 7f4b52b9ed00 -1
bluestore(/var/lib/ceph/osd/ceph-6) _open_db /var/lib/ceph/osd/ceph-6/block.db
link target doesn't exist
Jan 3 09:54:12 osd01 ceph-osd: 2018-01-03 09:54:12.993231 7f7ad37b1d00 -1
bluestore(/var/lib/ceph/osd/ceph-5) _open_db /var/lib/ceph/osd/ceph-5/block.db
link target doesn't exist
Then I decided to take this opportunity and "assume" a dead SSD thiuse recreate
partitions
I zapped /dev/sda and then
I used this
http://ceph.com/geen-categorie/ceph-recover-osds-after-ssd-journal-failure/ to
recreate partition for ceph-3
Unfortunatelyy it is now "complaining' about permissions but they seem fine
Jan 3 09:54:12 osd01 ceph-osd: 2018-01-03 09:54:12.992120 7f74003d1d00 -1
bdev(0x562336677800 /var/lib/ceph/osd/ceph-3/block.db) open open got: (13)
Permission denied
Jan 3 09:54:12 osd01 ceph-osd: 2018-01-03 09:54:12.992131 7f74003d1d00 -1
bluestore(/var/lib/ceph/osd/ceph-3) _open_db add block
device(/var/lib/ceph/osd/ceph-3/block.db) returned: (13) Permission denied
ls -al /var/lib/ceph/osd/ceph-3/
total 60
drwxr-xr-x 2 ceph ceph 310 Jan 2 16:39 .
drwxr-x---. 7 ceph ceph 131 Jan 2 16:39 ..
-rw-r--r-- 1 root root 183 Jan 2 16:39 activate.monmap
-rw-r--r-- 1 ceph ceph 3 Jan 2 16:39 active
lrwxrwxrwx 1 ceph ceph 58 Jan 2 16:32 block ->
/dev/disk/by-partuuid/13560618-5942-4c7e-922a-1fafddb4a4d2
lrwxrwxrwx 1 ceph ceph 58 Jan 2 16:32 block.db ->
/dev/disk/by-partuuid/5f610ecb-cb78-44d3-b503-016840d33ff6
-rw-r--r-- 1 ceph ceph 37 Jan 2 16:32 block.db_uuid
-rw-r--r-- 1 ceph ceph 37 Jan 2 16:32 block_uuid
lrwxrwxrwx 1 ceph ceph 58 Jan 2 16:32 block.wal ->
/dev/disk/by-partuuid/04d38ce7-c9e7-4648-a3f5-7b459e508109
Anyone had to deal with a similar issue ?
How d I fix the permission ?
What is the proper procedure for dealing with a "dead' SSD ?
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