[lustre-discuss] request for help - ZFS based Lustre, MDT disk not mounting

[Hebenstreit, Michael]

Yes, both mgs and mdt modules are present

Module                  Size  Used by
osp                   341968  27
mdd                   408582  17
lod                   508629  17
mdt                   818340  18
lfsck                 735096  20 lod,mdd,mdt
mgs                   351348  1
mgc                    94061  2 mgs
osd_zfs               363587  31
lquota                363475  77 mdt,osd_zfs

From: Feng Zhang [mailto:prod.feng at gmail.com]
Sent: Tuesday, June 19, 2018 8:13 AM
To: Hebenstreit, Michael <michael.hebenstreit at intel.com>
Cc: lustre-discuss <lustre-discuss at lists.lustre.org>
Subject: Re: [lustre-discuss] request for help - ZFS based Lustre, MDT disk not mounting

Is lustre module loaded already in kernel and started?

On Tue, Jun 19, 2018 at 10:07 AM, Hebenstreit, Michael <michael.hebenstreit at intel.com<mailto:michael.hebenstreit at intel.com>> wrote:
Mount commands hangs, no error messages in kernel log, tried already rebooting (twice)  - any ideas?

Thanks
Michael

root       4137  0.0  0.0 123520  1048 pts/0    S+   07:56   0:00 mount -t lustre mgsmdt/mdt /lfs/lfs11/mdt
root       4138  0.0  0.0  81728  3272 pts/0    S+   07:56   0:00 /sbin/mount.lustre mgsmdt/mdt /lfs/lfs11/mdt -o rw

[root at elfs11m1 ~]# dmesg | grep -i MDT
[  107.238438] LustreError: 137-5: lfs11-MDT0000_UUID: not available for connect from 36.101.16.38 at tcp<mailto:36.101.16.38 at tcp> (no target). If you are running an HA pair check that the target is mounted on the other server.
[  107.656990] Lustre: lfs11-MDT0000: Not available for connect from 36.101.16.39 at tcp<mailto:36.101.16.39 at tcp> (not set up)

ZFS does not report any issues, mgs (on the same zpool) mounted without issues

[root at elfs11m1 ~]# zfs list
NAME         USED  AVAIL  REFER  MOUNTPOINT
mgsmdt       149G  18.9T  40.8K  /mgsmdt
mgsmdt/mdt   147G  18.9T   147G  /mgsmdt/mdt
mgsmdt/mgs  4.48M  18.9T  4.48M  /mgsmdt/mgs
[root at elfs11m1 ~]# zpool status
  pool: mgsmdt
 state: ONLINE
status: Some supported features are not enabled on the pool. The pool can
        still be used, but some features are unavailable.
action: Enable all features using 'zpool upgrade'. Once this is done,
        the pool may no longer be accessible by software that does not support
        the features. See zpool-features(5) for details.
  scan: scrub repaired 0B in 2h14m with 0 errors on Thu May 31 13:36:58 2018
config:

        NAME        STATE     READ WRITE CKSUM
        mgsmdt      ONLINE       0     0     0
          raidz2-0  ONLINE       0     0     0
            sdb     ONLINE       0     0     0
            sdc     ONLINE       0     0     0
            sdd     ONLINE       0     0     0
            sde     ONLINE       0     0     0
            sdf     ONLINE       0     0     0
            sdg     ONLINE       0     0     0
            sdh     ONLINE       0     0     0
            sdi     ONLINE       0     0     0
            sdj     ONLINE       0     0     0
            sdk     ONLINE       0     0     0
            sdl     ONLINE       0     0     0
            sdm     ONLINE       0     0     0
            sdn     ONLINE       0     0     0
            sdo     ONLINE       0     0     0
            sdp     ONLINE       0     0     0
            sdq     ONLINE       0     0     0
            sdr     ONLINE       0     0     0
            sds     ONLINE       0     0     0
            sdt     ONLINE       0     0     0
            sdu     ONLINE       0     0     0
            sdv     ONLINE       0     0     0
            sdw     ONLINE       0     0     0
            sdx     ONLINE       0     0     0
            sdy     ONLINE       0     0     0

errors: No known data errors



------------------------------------------------------------------------
Michael Hebenstreit                 Senior Cluster Architect
Intel Corporation, MS: RR1-105/H14  Core and Visual Compute Group (DCE)
4100 Sara Road                      Tel.:   +1 505-794-3144
Rio Rancho, NM 87124
UNITED STATES                       E-mail: michael.hebenstreit at intel.com<mailto:michael.hebenstreit at intel.com>


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--
Best,

Feng
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