[lustre-discuss] Cannot mount lustre filesystem anymore

Brett Lee brettlee.lustre at gmail.com
Tue Apr 25 14:49:48 PDT 2017


"No such file or directory."

Could that be the cause?

Brett
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On Apr 25, 2017 4:25 AM, "Stefano Turolla" <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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>
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