[lustre-discuss] Fwd: FW: mdt mounting error

[Parag Khuraswar]

Hi,

Any resolution on this ?

Regards,
Parag.



-------- Original Message --------
Subject: [lustre-discuss] FW:  mdt mounting error
Date: 2017-11-07 15:29
 From: "Parag Khuraswar" <parag_k at citilindia.com>
To: "'Lustre discussion'" <lustre-discuss at lists.lustre.org>

Hi,

Lustre module is loaded.  I am getting bellow errors in
/var/log/messaged while mounting mdt.

Nov  7 14:10:03 mds1 kernel: LDISKFS-fs (dm-2): mounted filesystem with
ordered data mode. Opts:
user_xattr,errors=remount-ro,no_mbcache,nodelalloc

Nov  7 14:10:03 mds1 kernel: LustreError:
4852:0:(ldlm_lib.c:483:client_obd_setup()) can't add initial connection

Nov  7 14:10:03 mds1 kernel: LustreError:
4852:0:(obd_config.c:608:class_setup()) setup MGC10.2.1.204 at o2ib failed
(-2)

Nov  7 14:10:03 mds1 kernel: LustreError:
4852:0:(obd_mount.c:202:lustre_start_simple()) MGC10.2.1.204 at o2ib setup
error -2

Nov  7 14:10:03 mds1 kernel: LustreError:
4852:0:(obd_mount_server.c:1573:server_put_super()) no obd home-MDT0000

Nov  7 14:10:03 mds1 kernel: LustreError:
4852:0:(obd_mount_server.c:132:server_deregister_mount()) home-MDT0000
not registered

Nov  7 14:10:03 mds1 kernel: Lustre: server umount home-MDT0000 complete

Nov  7 14:10:03 mds1 kernel: LustreError:
4852:0:(obd_mount.c:1504:lustre_fill_super()) Unable to mount  (-2)

Regards,

Parag

FROM: Ben Evans [mailto:bevans at cray.com]
SENT: Wednesday, November , 2017 6:19 PM
TO: Raj; Parag Khuraswar
CC: Lustre discussion
SUBJECT: Re: [lustre-discuss] mdt mounting error

On the node in question Try: lsmod | grep lustre

followed by: modprobe lustre

I'm betting the modules aren't loaded for some reason, generally that
reason is found in dmesg.

FROM: lustre-discuss <lustre-discuss-bounces at lists.lustre.org> on behalf
of Raj <rajgautam at gmail.com>
DATE: Wednesday, November 1, 2017 at 7:48 AM
TO: Parag Khuraswar <parag_k at citilindia.com>
CC: Lustre discussion <lustre-discuss at lists.lustre.org>
SUBJECT: Re: [lustre-discuss] mdt mounting error

Parag, I have not tested two FS using a common MGT and I don't know
whether it is supported.

On Wed, Nov 1, 2017 at 6:37 AM Parag Khuraswar <parag_k at citilindia.com>
wrote:

> Hi Raj,
> 
> But I have two file systems,
> And I think I can use one mgt for two filesystems. Please correct me
> if
> I am wrong.
> 
> Regards,
> Parag
> 
> On 2017-11-01 16:56, Raj wrote:
>> The following can contribute to this issue:
>> - Missing FS name in mgt creation (it must be <=9 character long):
>> --fsname=
>> mkfs.lustre --servicenode=10.2.1.204 at o2ib
>> --servicenode=10.2.1.205 at o2ib --FSNAME=HOME --mgs /dev/mapper/mpathc
>> 
>> - verify if /mdt directory exists
>> 
>> On Wed, Nov 1, 2017 at 6:16 AM Raj <rajgautam at gmail.com> wrote:
>> 
>>> What options in mkfs.lustre did you use to format with lustre?
>>> 
>>> On Wed, Nov 1, 2017 at 6:14 AM Parag Khuraswar
>>> <parag_k at citilindia.com> wrote:
>>> 
>>> Hi Raj,
>>> 
>>> Yes, /dev/mapper/mpatha available.
>>> 
>>> I could format and mount using ext4.
> 
>>> 
>>> Regards,
>>> 
>>> Parag
>>> 
>>> FROM: Raj [mailto:rajgautam at gmail.com]
>>> SENT: Wednesday, November , 2017 4:39 PM
>>> TO: Parag Khuraswar; Lustre discussion
>>> SUBJECT: Re: [lustre-discuss] mdt mounting error
>>> 
>>> Parag,
>>> Is the device /dev/mapper/mpatha available?
>>> If not, the multipathd may not have started or the multipath
>>> configuration may not be correct.
>>> 
>>> On Wed, Nov 1, 2017 at 5:18 AM Parag Khuraswar
>>> <parag_k at citilindia.com> wrote:
>>> 
>>> Hi,
>>> 
>>> I am getting below error while mounting mdt. Mgt is mounted.
>>> 
>>> Please suggest
>>> 
>>> [root at mds2 ~]# mount -t lustre /dev/mapper/mpatha /mdt
>>> 
>>> mount.lustre: mount /dev/mapper/mpatha at /mdt 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)
>>> 
>>> Regards,
>>> 
>>> Parag
>>> 
>>> _______________________________________________
>>> lustre-discuss mailing list
>>> lustre-discuss at lists.lustre.org
>>> http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org
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