The first question I have is to understand why some disks/OSDs showed status of
'DOWN' - there was no activity on the cluster. Last night all the OSDs were
up. What can cause OSDs to go down?
- epk
From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of EP
Komarla
Sent: Monday, July 18, 2016 6:43 PM
To: ceph-users@lists.ceph.com
Subject: [ceph-users] OSD dropped out, now trying to get them back on to the
cluster
Hi,
I have created a cluster with the below configuration:
- 6 Storage nodes, each with 20 disks
- I have total of 120 OSDs
Cluster was working fine. All of a sudden today morning I noticed some OSD's
(7 to be exact) were down on one server.
I rebooted the server, 4 OSDs came back. Three OSDs were stuck on 'down' state.
I tried to bring them online, wasn't successful.
I removed the OSDs using:
Ceph osd rm osd.0
Ceph osd crush remove osd.0
I ran the same command for all the 3 osd's that were done. Now I am left with
17 OSDs.
I am trying to bring them back online.
I used the commands:
Ceph-deploy osd create ep-storage-2-14:sda:sdu
Ceph-deploy osd create ep-storage-2-14:sda:sdu
Where sda is the OSD partition and sdu is the journal partition
I am getting this below error:
[cid:image002.png@01D1E125.5FC858A0]
I am not following what this error means. Can someone help me on how to bring
these OSDs back? I know I am making some mistake, but can't figure out.
Thanks in advance,
- epk
EP KOMARLA,
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Phone: 408-674-6090 (mobile)
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