18 Mar
2021
18 Mar
'21
2:49 p.m.
Yeah, finally started just super slow.
Currently I want to export import the pgs from the died OSDs make the cluster be able to
start cephfs and save the data. Also looking for some space to be able to export the pg
because it's quite big, 100s of gb.
Istvan Szabo
Senior Infrastructure Engineer
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Agoda Services Co., Ltd.
e: istvan.szabo(a)agoda.com
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-----Original Message-----
From: Frank Schilder <frans(a)dtu.dk>
Sent: Thursday, March 18, 2021 6:16 PM
To: Szabo, Istvan (Agoda) <Istvan.Szabo(a)agoda.com>om>; Ceph Users
<ceph-users(a)ceph.io>
Subject: Re: PG export import
It sounds like there is a general problem on this cluster with OSDs not starting. You
probably need to go back to the logs and try to find out why the MONs don't allow the
OSDs to join. MON IPs, cluster ID, network config in ceph.conf and on host, cluster name,
authentication, ports, messenger version etc.
Best regards,
=================
Frank Schilder
AIT Risø Campus
Bygning 109, rum S14
________________________________________
From: Szabo, Istvan (Agoda) <Istvan.Szabo(a)agoda.com>
Sent: 18 March 2021 10:48:05
To: Ceph Users
Subject: [ceph-users] PG export import
Hi,
I’ve tried to save some pg from a dead osd, I made this:
Picked on the same server an osd which is not really used and stopped that osd and import
the exported one from the dead one.
root@server:~# ceph-objectstore-tool --data-path /var/lib/ceph/osd/ceph-33 --no-mon-config
--pgid 44.c0s0 --op export --file ./pg44c0s0 Exporting 44.c0s0 info 44.c0s0( empty
local-lis/les=0/0 n=0 ec=192123/175799 lis/c=4865474/4851556 les/c/f=4865475/4851557/0
sis=4865493) Export successful
root@server:~# ceph-objectstore-tool --data-path /var/lib/ceph/osd/ceph-34 --no-mon-config
--op import --file ./pg44c0s0 get_pg_num_history pg_num_history pg_num_history(e5583546
pg_nums
{20={173213=256},21={219434=64},22={220991=64},24={219240=32},25={1446965=128},42={175793=32},43={197388=64},44={192123=512}}
deleted_pools ) Importing pgid 44.c0s0 write_pg epoch 4865498 info 44.c0s0( empty
local-lis/les=0/0 n=0 ec=192123/175799 lis/c=4865474/4851556 les/c/f=4865475/4851557/0
sis=4865493) Import successful
Started back 34 and it says the osd is running but in the cluster map it is down :/
root@server:~# systemctl status ceph-osd@34 -l ●
ceph-osd@34.service<mailto:ceph-osd@34.service> - Ceph object storage daemon
osd.34
Loaded: loaded
(/lib/systemd/system/ceph-osd@.service<mailto:/lib/systemd/system/ceph-osd@.service>;
enabled-runtime; vendor preset: enabled)
Active: active (running) since Thu 2021-03-18 10:38:00 CET; 8min ago
Process: 45388 ExecStartPre=/usr/lib/ceph/ceph-osd-prestart.sh --cluster ${CLUSTER}
--id 34 (code=exited, sta>
Main PID: 45392 (ceph-osd)
Tasks: 60
Memory: 856.2M
CGroup: /system.slice/system-ceph\x2dosd.slice/ceph-osd(a)34.service
└─45392 /usr/bin/ceph-osd -f --cluster ceph --id 34 --setuser ceph --setgroup
ceph
Mar 18 10:38:00 server systemd[1]: Starting Ceph object storage daemon osd.34...
Mar 18 10:38:00 server systemd[1]: Started Ceph object storage daemon osd.34.
Mar 18 10:38:21 server ceph-osd[45392]: 2021-03-18T10:38:21.817+0100 7f41738d5dc0 -1
osd.34 5583546 log_to_mon> Mar 18 10:38:21 server ceph-osd[45392]:
2021-03-18T10:38:21.825+0100 7f41738d5dc0 -1 osd.34 5583546 mon_cmd_ma>
Any idea?
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