[lustre-discuss] OST is not mounting

[Backer]

Hi,

Sending this again. Appreciate your help.

On Sun, 5 Nov 2023 at 11:11, Backer <backer.kolo at gmail.com> wrote:

> Hi,
>
> I am new to this email list. Looking to get some help on why an OST is not
> getting mounted.
>
>
> The cluster was running healthy and the OST experienced an issue and Linux
> re-mounted the OST read only. After fixing the issue and rebooting the node
> multiple times, it wouldn't mount.
>
> When the mount is done, the mount command errors out stating that that the
> index is already in use. The index for the device is 33.  There is no place
> where this index is mounted.
>
> The debug message from the MGS during the mount is attached at the end of
> this email. It is asking to use writeconf. After using writeconfig, the
> device was mounted. Looking for a couple of things here.
>
> - I am hoping that the writeconf method is the right thing to do here.
> - Why did OST become in this state after the write failure and was mounted
> RO.  The write error was due to iSCSI target going offline and coming back
> after a few seconds later.
>
> 20000000:01000000:17.0:1698240468.758487:0:91492:0:(mgs_handler.c:496:mgs_target_reg())
> updating fs1-OST0021, index=33
>
> 20000000:00000001:17.0:1698240468.758488:0:91492:0:(mgs_llog.c:4403:mgs_write_log_target())
> Process entered
>
> 20000000:00000001:17.0:1698240468.758488:0:91492:0:(mgs_llog.c:671:mgs_set_index())
> Process entered
>
> 20000000:00000001:17.0:1698240468.758488:0:91492:0:(mgs_llog.c:572:mgs_find_or_make_fsdb())
> Process entered
>
> 20000000:00000001:17.0:1698240468.758489:0:91492:0:(mgs_llog.c:551:mgs_find_or_make_fsdb_nolock())
> Process entered
>
> 20000000:00000001:17.0:1698240468.758489:0:91492:0:(mgs_llog.c:565:mgs_find_or_make_fsdb_nolock())
> Process leaving (rc=0 : 0 : 0)
>
> 20000000:00000001:17.0:1698240468.758489:0:91492:0:(mgs_llog.c:578:mgs_find_or_make_fsdb())
> Process leaving (rc=0 : 0 : 0)
>
> 20000000:02020000:17.0:1698240468.758490:0:91492:0:(mgs_llog.c:711:mgs_set_index())
> 140-5: Server fs1-OST0021 requested index 33, but that index is already in
> use. Use --writeconf to force
>
> 20000000:00000001:17.0:1698240468.772355:0:91492:0:(mgs_llog.c:712:mgs_set_index())
> Process leaving via out_up (rc=18446744073709551518 : -98 :
> 0xffffffffffffff9e)
>
> 20000000:00000001:17.0:1698240468.772356:0:91492:0:(mgs_llog.c:4408:mgs_write_log_target())
> Process leaving (rc=18446744073709551518 : -98 : ffffffffffffff9e)
>
> 20000000:00020000:17.0:1698240468.772357:0:91492:0:(mgs_handler.c:503:mgs_target_reg())
> Failed to write fs1-OST0021 log (-98)
>
> 20000000:00000001:17.0:1698240468.783747:0:91492:0:(mgs_handler.c:504:mgs_target_reg())
> Process leaving via out (rc=18446744073709551518 : -98 : 0xffffffffffffff9e)
>
>
>
>
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