[linux-lvm] mirrored LV + cmirror problem

[Lajkó Attila]

Hello,


I have a problem with clvmd an cmirror:

We have a two nodes cluster (RHEL4.6). I created a mirrored LV on a  
clustered volume group on 2 iscsi LUNS (VTrak M200i).
When i disconnect one of the LUNs - simulating a storage problem -   
the mirrored LV doesn't go to linear mode, the LVM commands (lvs,  
lvconvert, etc.) get stuck and the GFS file system is not accessible  
(on both nodes).

What is see in /var/log/messages:

Feb 15 12:29:26 el42 kernel: dm-cmirror: server_complete_resync_work -  
Setting recovery_halted = 1
Feb 15 12:29:26 el42 kernel: dm-cmirror: Log flush failure: -5 -EIO
Feb 15 12:29:26 el42 last message repeated 4 times
Feb 15 12:29:26 el42 kernel: dm-cmirror: Log flush failure: -5 -EIO
Feb 15 12:29:26 el42 kernel: dm-cmirror: Recovery halted due to error  
on ItlWCmkP
Feb 15 12:29:26 el42 lvm[4929]: WARNING: dev_open(/dev/mapper/mirrp3)  
called while suspended
Feb 15 12:29:26 el42 kernel: dm-cmirror: LOG INFO:
Feb 15 12:29:26 el42 kernel: dm-cmirror:   uuid: LVM- 
zEHPYfjtLCL7yqQhsG2kcPzthyLbyBPd7xlok1gd7NHgXR3l2XaVQWEVItlWCmkP
Feb 15 12:29:26 el42 kernel: dm-cmirror:   uuid_ref    : 1
Feb 15 12:29:26 el42 kernel: dm-cmirror:   log type    : disk
Feb 15 12:29:26 el42 kernel: dm-cmirror:  ?region_count: 320
Feb 15 12:29:26 el42 kernel: dm-cmirror:  ?sync_count  : 320
Feb 15 12:29:26 el42 kernel: dm-cmirror:  ?sync_search : 320
Feb 15 12:29:26 el42 kernel: dm-cmirror:   in_sync     : YES
Feb 15 12:29:26 el42 kernel: dm-cmirror:   suspended   : NO
Feb 15 12:29:26 el42 kernel: dm-cmirror:   recovery_halted : YES
Feb 15 12:29:26 el42 kernel: dm-cmirror:   server_id   : 2
Feb 15 12:29:26 el42 kernel: dm-cmirror:   server_valid: YES
Feb 15 12:29:26 el42 kernel: dm-cmirror: cluster_presuspend: recovery  
halted on ItlWCmkP(1)
Feb 15 12:29:26 el42 kernel: dm-cmirror: cluster_postsuspend
Feb 15 12:29:26 el42 kernel: dm-cmirror: Telling everyone I'm  
suspending (ItlWCmkP)
Feb 15 12:29:26 el42 kernel: dm-cmirror: LRT_MASTER_LEAVING(13):  
(ItlWCmkP)
Feb 15 12:29:26 el42 kernel: dm-cmirror:   starter     : 2
Feb 15 12:29:26 el42 kernel: dm-cmirror:   co-ordinator: 0
Feb 15 12:29:26 el42 kernel: dm-cmirror:   node_count  : 0
Feb 15 12:29:26 el42 kernel: dm-cmirror: LRT_MASTER_LEAVING(13):  
(ItlWCmkP)
Feb 15 12:29:26 el42 kernel: dm-cmirror:   starter     : 2
Feb 15 12:29:26 el42 kernel: dm-cmirror:   co-ordinator: 0
Feb 15 12:29:26 el42 kernel: dm-cmirror:   node_count  : 2
Feb 15 12:29:26 el42 kernel: dm-cmirror: LRT_ELECTION(10): (ItlWCmkP)
Feb 15 12:29:26 el42 kernel: dm-cmirror:   starter     : 2
Feb 15 12:29:26 el42 kernel: dm-cmirror:   co-ordinator: 57005
Feb 15 12:29:26 el42 kernel: dm-cmirror:   node_count  : 0
Feb 15 12:29:26 el42 kernel: dm-cmirror: LRT_ELECTION(10): (ItlWCmkP)
Feb 15 12:29:26 el42 kernel: dm-cmirror:   starter     : 2
Feb 15 12:29:26 el42 lvm[4929]: WARNING: dev_open(/etc/lvm/lvm.conf)  
called while suspended
Feb 15 12:29:26 el42 kernel: dm-cmirror:   co-ordinator: 1
Feb 15 12:29:26 el42 kernel: dm-cmirror:   node_count  : 2
Feb 15 12:29:26 el42 kernel: dm-cmirror: LRT_SELECTION(11): (ItlWCmkP)
Feb 15 12:29:26 el42 kernel: dm-cmirror:   starter     : 2
Feb 15 12:29:27 el42 kernel: dm-cmirror:   co-ordinator: 1
Feb 15 12:29:27 el42 kernel: dm-cmirror:   node_count  : 2
Feb 15 12:29:27 el42 kernel: dm-cmirror: LRT_MASTER_ASSIGN(12):  
(ItlWCmkP)
Feb 15 12:29:27 el42 kernel: dm-cmirror:   starter     : 2
Feb 15 12:29:27 el42 kernel: dm-cmirror:   co-ordinator: 1
Feb 15 12:29:27 el42 lvm[4929]: Failed to remove faulty devices in  
vgtest-lvtest
Feb 15 12:29:27 el42 kernel: dm-cmirror:   node_count  : 1
Feb 15 12:29:27 el42 kernel: dm-cmirror: Suspending now (ItlWCmkP)
Feb 15 12:29:28 el42 lvm[4929]: No longer monitoring mirror device  
vgtest-lvtest for events

Regards,
Attila Lajkó