[lustre-discuss] Cannot mount lustre filesystem anymore

Wed Apr 26 01:27:12 PDT 2017

Actually, this is what I thought, but all files and directories are there

[root at newmaster ~]# ls -lrtd /dev/mapper/seqdata /mnt/lustre-ost /dev/dm-0
drwxr-xr-x 2 root root      6 Dec  2 13:35 /mnt/lustre-ost
brw-rw---- 1 root disk 253, 0 Apr 25 11:59 /dev/dm-0
lrwxrwxrwx 1 root root      7 Apr 25 11:59 /dev/mapper/seqdata -> ../dm-0

Besides that, the file system seems to be there
[root at newmaster ~]# e2fsck /dev/mapper/seqdata
e2fsck 1.42.13.wc5 (15-Apr-2016)
seqdata-OST0000: clean, 974805/31538944 files, 3578657570/8073955508 blocks

Stefano

On 04/25/2017 11:49 PM, Brett Lee wrote:
>
> "No such file or directory."
>
> Could that be the cause?
>
> Brett
> --
> Protect Yourself Against Cybercrime
> PDS Software Solutions LLC
> https://www.TrustPDS.com
>
> On Apr 25, 2017 4:25 AM, "Stefano Turolla" <turolla at genzentrum.lmu.de
> <mailto:turolla at genzentrum.lmu.de>> wrote:
>
>     Dear all, I am a newbie in lustre, I set up a simple configuration
>     to mount a filesystem from a Dell Powervault MD3800i (iscsi +
>     multipath enabled)
>     It was working properly but, after the last reboot I cannot mount
>     the lustre filesystem anymore
>     I am running lustre 3.10.0 on scientific linux 7.3.
>     I put MDT/MDS on the server
>     together with OST
>
>     Here is the relevant /etc/fstab
>
>     # Lustre MDT / MDS (Manage filenames, directories etc and Block
>     devices
>
>     /dev/sda1                       /mnt/lustre-mdt-mds    
>     lustre          noauto,_netdev        0 0
>
>     /dev/mapper/seqdata             /mnt/lustre-ost        
>     lustre          noauto,_netdev        0 0
>
>     # Lustre Client
>
>     master-mds at tcp:/seqdata         /seq_data              
>     lustre          noauto,_netdev        0 0
>
>
>     I can mount the /mnt/lustre-mdt-mds  filesystem but not the OST,
>     and of course no  client
>
>
>     here are the devices
>     [root at newmaster lustre]# cat /proc/fs/lustre/devices
>
>       0 UP osd-ldiskfs seqdata-MDT0000-osd seqdata-MDT0000-osd_UUID 9
>
>       1 UP mgs MGS MGS 5
>
>       2 UP mgc MGC10.163.85.99 at tcp 69e92317-78f6-eef7-1764-57da5aadafe2 5
>
>       3 UP mds MDS MDS_uuid 3
>
>       4 UP lod seqdata-MDT0000-mdtlov seqdata-MDT0000-mdtlov_UUID 4
>
>       5 UP mdt seqdata-MDT0000 seqdata-MDT0000_UUID 5
>
>       6 UP mdd seqdata-MDD0000 seqdata-MDD0000_UUID 4
>
>       7 UP qmt seqdata-QMT0000 seqdata-QMT0000_UUID 4
>
>       8 UP osp seqdata-OST0000-osc-MDT0000 seqdata-MDT0000-mdtlov_UUID 5
>
>       9 UP lwp seqdata-MDT0000-lwp-MDT0000
>     seqdata-MDT0000-lwp-MDT0000_UUID 5
>
>
>
>     Here are the errors when I try to mount the OST
>
>     [root at newmaster lustre]# mount /mnt/lustre-ost
>
>
>     Apr 25 12:13:41 newmaster kernel: LDISKFS-fs (dm-0): file extents
>     enabled, maximum tree depth=5
>
>     Apr 25 12:13:42 newmaster kernel: LDISKFS-fs (dm-0): mounted
>     filesystem with ordered data mode. Opts:
>     ,errors=remount-ro,no_mbcache,nodelalloc
>
>     Apr 25 12:13:42 newmaster kernel: LustreError:
>     11242:0:(llog_osd.c:246:llog_osd_read_header())
>     seqdata-OST0000-osd: error reading [0xa:0x14:0x0] log header size
>     8192: rc = -14
>
>     Apr 25 12:13:42 newmaster kernel: LustreError:
>     11242:0:(llog_osd.c:246:llog_osd_read_header()) Skipped 1 previous
>     similar message
>
>     Apr 25 12:13:42 newmaster kernel: LustreError:
>     11242:0:(mgc_request.c:1832:mgc_llog_local_copy())
>     MGC10.163.85.99 at tcp: failed to copy remote log seqdata-client: rc
>     = -14
>
>     Apr 25 12:13:42 newmaster kernel: LustreError: 13a-8: Failed to
>     get MGS log seqdata-client and no local copy.
>
>     Apr 25 12:13:42 newmaster kernel: LustreError: 15c-8:
>     MGC10.163.85.99 at tcp: The configuration from log 'seqdata-client'
>     failed (-2). This may be the result of communication errors
>     between this node and the MGS, a bad configuration, or other
>     errors. See the syslog for more information.
>
>     Apr 25 12:13:42 newmaster kernel: LustreError:
>     11242:0:(obd_mount_server.c:1369:server_start_targets())
>     seqdata-OST0000: failed to start LWP: -2
>
>     Apr 25 12:13:42 newmaster kernel: LustreError:
>     11242:0:(obd_mount_server.c:1844:server_fill_super()) Unable to
>     start targets: -2
>
>     Apr 25 12:13:42 newmaster kernel: Lustre: Failing over seqdata-OST0000
>
>     Apr 25 12:13:42 newmaster kernel: Lustre: server umount
>     seqdata-OST0000 complete
>
>     Apr 25 12:13:42 newmaster kernel: LustreError:
>     11242:0:(obd_mount.c:1449:lustre_fill_super()) Unable to mount  (-2)
>
>     mount.lustre: mount /dev/mapper/seqdata at /mnt/lustre-ost failed:
>     No such file or directory
>
>     Is the MGS specification correct?
>
>     Is the filesystem name correct?
>
>     If upgrading, is the copied client log valid? (see upgrade docs)
>
>
>
>     Here is the lnet configuration, currently only the server is listed
>     [root at newmaster lustre]# cat /etc/modprobe.d/lustre.conf
>
>     options lnet networks=tcp0(eth2)
>
>
>     I tried to search in the mailing list some good explanation of
>     what happened but I could not find any.
>     Could you please help me to debug the problem?
>     Thanks a lot in advance
>     Stefano Turolla
>
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>

-- 
Stefano Turolla
Gene Center
University of Munich
Feodor-Lynen-Str. 25 81377 Munich, Germany
tel. +49 (0)89 2180 71055
email. turolla at genzentrum.lmu.de

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