[Lustre-discuss] error while upgrading 1.6.5 to 1.6.7.2

[Michal Bialoskorski]

Hello All!

 I'm upgrading lustre from 1.6.5 to 1.6.7 version.
I've done all steps from manual and while probe of mounting OST I got an
error on MDS:

home-OST0000 claims to have registered, but this MGS does not know about
it, preventing registration

I've tried to do "if an error occurs" step:

ossh2:# tunefs.lustre --ost --fsname=home
--mgssnode=192.168.27.252 at o2ib,192.168.27.253 at o2ib1
--mgsnode=192.168.27.250 at o2ib,192.168.27.251 at o2ib1 /dev/mapper/home.ost.01
[...]
tunefs.lustre: cannot change the name of a registered target
tunefs.lustre: exiting with 1 (Operation not permitted)

Can any one help me?

I'm afraid of loosing all users data.

Regards,
Michal.


The details  are:

****************
First I mount MDT:
****************
Jun 26 11:19:03 mdsh kernel: Lustre: MGS MGS started
Jun 26 11:19:03 mdsh kernel: Lustre: MGC192.168.27.250 at o2ib:
Reactivating import
Jun 26 11:19:03 mdsh kernel: Lustre: Enabling user_xattr
Jun 26 11:19:03 mdsh kernel: Lustre:
23387:0:(mds_fs.c:511:mds_init_server_data()) RECOVERY: service
home-MDT0000, 981 recoverable clients, last_transno 2716170795
Jun 26 11:19:03 mdsh kernel: Lustre: MDT home-MDT0000 now serving
home-MDT0000_UUID (home-MDT0000/08f9d071-1eb1-a32e-4c3f-2beb50305606),
but will be in recovery for at least 5:00, or until 981 clients
reconnect. During this time new clients will not be allowed to connect.
Recovery progress can be monitored by watching
/proc/fs/lustre/mds/home-MDT0000/recovery_status.
Jun 26 11:19:03 mdsh kernel: Lustre:
23387:0:(lproc_mds.c:271:lprocfs_wr_group_upcall()) home-MDT0000: group
upcall set to /usr/sbin/l_getgroups
Jun 26 11:19:03 mdsh kernel: Lustre: home-MDT0000.mdt: set parameter
group_upcall=/usr/sbin/l_getgroups
Jun 26 11:19:03 mdsh kernel: Lustre: Server home-MDT0000 on device
/dev/mapper/home.mdt has started

********************
Second I try to mount OST:
********************
ossh2:~# mount -t lustre /dev/mapper/home.ost.01 /lustre/home/ost.01
mount.lustre: mount /dev/mapper/home.ost.01 at /lustre/home/ost.01
failed: No such device or address
The target service failed to start (bad config log?)
(/dev/mapper/home.ost.01).  See /var/log/messages.

syslog on OSS said:

Jun 26 11:23:58 ossh2 kernel: Lustre: MGC192.168.27.252 at o2ib:
Reactivating import
Jun 26 11:23:58 ossh2 kernel: LustreError: 11-0: an error occurred while
communicating with 192.168.27.252 at o2ib. The mgs_target_reg operation
failed with -2
Jun 26 11:23:59 ossh2 kernel: LustreError:
10467:0:(obd_mount.c:1129:server_start_targets()) no server named
home-OST0000 was started
Jun 26 11:23:59 ossh2 kernel: LustreError:
10467:0:(obd_mount.c:1628:server_fill_super()) Unable to start targets: -6
Jun 26 11:23:59 ossh2 kernel: LustreError:
10467:0:(obd_mount.c:1411:server_put_super()) no obd home-OST0000
Jun 26 11:23:59 ossh2 kernel: LustreError:
10467:0:(ldlm_request.c:1033:ldlm_cli_cancel_req()) Got rc -108 from
cancel RPC: canceling anyway
Jun 26 11:23:59 ossh2 kernel: LustreError:
10467:0:(ldlm_request.c:1622:ldlm_cli_cancel_list())
ldlm_cli_cancel_list: -108
Jun 26 11:23:59 ossh2 kernel: LDISKFS-fs: mballoc: 0 blocks 0 reqs (0
success)
Jun 26 11:23:59 ossh2 kernel: LDISKFS-fs: mballoc: 0 extents scanned, 0
goal hits, 0 2^N hits, 0 breaks, 0 lost
Jun 26 11:23:59 ossh2 kernel: LDISKFS-fs: mballoc: 0 generated and it took 0
Jun 26 11:23:59 ossh2 kernel: LDISKFS-fs: mballoc: 0 preallocated, 0
discarded
Jun 26 11:23:59 ossh2 kernel: Lustre: server umount home-OST0000 complete
Jun 26 11:23:59 ossh2 kernel: LustreError:
10467:0:(obd_mount.c:1991:lustre_fill_super()) Unable to mount  (-6)


syslog on MDS said:

Jun 26 11:23:59 mdsh kernel: LustreError: 13b-9: home-OST0000 claims to
have registered, but this MGS does not know about it, preventing
registration.
Jun 26 11:23:59 mdsh kernel: LustreError:
23383:0:(mgs_handler.c:654:mgs_handle()) MGS handle cmd=253 rc=-2
Jun 26 11:23:59 mdsh kernel: LustreError:
23383:0:(ldlm_lib.c:1643:target_send_reply_msg()) @@@ processing error
(-2)  req at ffff8107f06ea450 x34/t0
o253->123978a8-a36c-6f4c-9da9-521de5ecebd0 at NET_0x50000c0a81bf6_UUID:0/0
lens 4672/4672 e 0 to 0 dl 1246008339 ref 1 fl Interpret:/0/0 rc 0/0