[lustre-discuss] FW: mdt mounting error

[Parag Khuraswar]

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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