[Lustre-discuss] unable to mount ost after mdt migration and mds/mgs failover configuration

[D. Marc Stearman]

According to the Lustre Manual, you specify multiple mgsnode  
parameters on the OSTs, for example:

tunefs.lustre --writeconf --erase-param --param  
mgsnode=172.17.4.123 at o2ib --param mgsnode=172.17.4.124 at o2ib --param  
ost.quota_type=ug2 --fsname=lustre /dev/sdc

should accomplish what you are trying to do.

When building the file system using mkfs.lustre, the syntax is  
slightly different with multiple --mgsnode=  options specified.

The clients would then mount using:

mount -t lustre 172.17.4.123 at o2ib:172.17.4.124 at o2ib:/lustre <mountpoint>

This is in section 4.4.1 of the manual (at least the version I'm  
looking at - from July 2010)

-Marc

----
D. Marc Stearman
Lustre Operations Lead
marc at llnl.gov
925.423.9670
Pager: 1.888.203.0641




On Feb 24, 2011, at 10:36 AM, Michael Barnes wrote:

>
> Update:
>
> If I do this:
>
> tunefs.lustre --writeconf --erase-param --param  
> mgsnode=172.17.4.123 at o2ib --param ost.quota_type=ug2 -- 
> fsname=lustre /dev/sdc
>
> ie, no failover specification on the mgsnode the ost mounts.
>
> Do I have the wrong syntax in the below line?
>
> tunefs.lustre --writeconf --erase-param --param  
> mgsnode=172.17.4.123 at o2ib:172.17.4.124 at o2ib --param  
> ost.quota_type=ug2 --fsname=lustre /dev/sdc
>
> Thanks in advance,
>
> -mb
>
> On Feb 24, 2011, at 10:38 AM, Michael Barnes wrote:
>
>>
>> Hello list,
>>
>> I've migrated our mdt data to a new machine via tar and getfattr,  
>> and then did the following:
>>
>> mds/mgs: rm OBJECTS/* CATALOGS
>>
>> mds/mgs: tunefs.lustre --writeconf --mgs --mdt --fsname=lustre -- 
>> erase-param --param mdt.quota_type=ug2 --param mdt.group_upcall=/ 
>> usr/sbin/l_getgroups --param failover.node=172.17.4.124 at o2ib /dev/sdb
>>
>> mds/mgs: mount -t lustre /dev/sdb /mdt
>>
>>
>> Everything seems OK up to this point.
>>
>>
>> I then modified each ost with:
>>
>> oss: tunefs.lustre --writeconf --erase-param --param  
>> mgsnode=172.17.4.123 at o2ib:172.17.4.124 at o2ib --param  
>> ost.quota_type=ug2 /dev/sdb
>>
>>
>> Then, when I try to mount the ost I get in dmesg:
>>
>> Lustre: 3269:0:(client.c:1476:ptlrpc_expire_one_request()) @@@  
>> Request x1361639653769217 sent from MGC172.17.4.123 at o2ib to NID  
>> 172.17.4.124 at o2ib 0s ago has failed due to network error (5s prior  
>> to deadline).
>> req at ffff810133f24800 x1361639653769217/t0 o250- 
>> >MGS at MGC172.17.4.123@o2ib_0:26/25 lens 368/584 e 0 to 1 dl  
>> 1298560772 ref 1 fl Rpc:N/0/0 rc 0/0
>> LustreError: 3164:0:(client.c:858:ptlrpc_import_delay_req()) @@@  
>> IMP_INVALID  req at ffff810106b39c00 x1361639653769218/t0 o253->MGS at MGC172.17.4.123 
>> @o2ib_0:26/25 lens 4736/4928 e 0 to 1 dl 0 ref 1 fl Rpc:/0/0 rc 0/0
>> LustreError: 3164:0:(obd_mount.c:1097:server_start_targets())  
>> Required registration failed for lustre-OST0037: -108
>> LustreError: 3164:0:(obd_mount.c:1655:server_fill_super()) Unable  
>> to start targets: -108
>> LustreError: 3164:0:(obd_mount.c:1438:server_put_super()) no obd  
>> lustre-OST0037
>> LustreError: 3164:0:(obd_mount.c:147:server_deregister_mount())  
>> lustre-OST0037 not registered
>>
>>
>> The first mds/mgsnode has the mdt mounted.  lctl ping and regular  
>> TCP/ip works over the ib interface.  Did I miss something that the  
>> ost needs to join the new mds/mgs configuration?
>>
>> Thanks,
>>
>> -mb
>>
>> --
>> +-----------------------------------------------
>> | Michael Barnes
>> |
>> | Thomas Jefferson National Accelerator Facility
>> | Scientific Computing Group
>> | 12000 Jefferson Ave.
>> | Newport News, VA 23606
>> | (757) 269-7634
>> +-----------------------------------------------
>>
>>
>>
>>
>> _______________________________________________
>> Lustre-discuss mailing list
>> Lustre-discuss at lists.lustre.org
>> http://lists.lustre.org/mailman/listinfo/lustre-discuss
>
> --
> +-----------------------------------------------
> | Michael Barnes
> |
> | Thomas Jefferson National Accelerator Facility
> | Scientific Computing Group
> | 12000 Jefferson Ave.
> | Newport News, VA 23606
> | (757) 269-7634
> +-----------------------------------------------
>
>
>
>
> _______________________________________________
> Lustre-discuss mailing list
> Lustre-discuss at lists.lustre.org
> http://lists.lustre.org/mailman/listinfo/lustre-discuss