[ClusterLabs] SLES15 SP2: Problem deactivating Clustered RAID

[heming.zhao at suse.com]

On 1/11/21 11:17 PM, Ulrich Windl wrote:
> Hi!
> 
> I'm fixing my configuration after each unexpected fencing. Probably I missed some dependency, but these messages seem somewhat unexpected to me:
> 
> Jan 11 15:54:32 h18 Raid1(prm_lockspace_raid_md10)[30630]: INFO: running lsof to list /dev/md10 users...
> Jan 11 15:54:32 h18 systemd[1]: Stopping LVM event activation on device 9:1...
> Jan 11 15:54:32 h18 Raid1(prm_lockspace_raid_md10)[30645]: WARNING: command failed: lsof /dev/md10

I am not familiar with RA raid1, and try to share my looking.
The warning is about lsof executing failed.
the related RA code is in stop routine:
```
raid1_stop
  stop_raid_users
   get_users_pids
    lsof $mddev | tail -n +2  <=== failed!
```
what's status about /dev/md10? what's the machine's disks layout?

> Jan 11 15:54:32 h18 Raid1(prm_lockspace_raid_md10)[30651]: INFO: Attempting to mark array /dev/md10 readonly
> Jan 11 15:54:32 h18 Raid1(prm_lockspace_raid_md10)[30659]: ERROR: Failed to set /dev/md10 readonly (rc=1)

The reason is failed to set up readonly that maybe /dev/md10 was locking by virtlockd.
I guess virtlockd conflict with RA raid1.

> 
> (resource-agents-4.4.0+git57.70549516-3.12.1.x86_64)
> 
> Earlier the RA had reported:
> Jan 11 15:54:31 h18 Raid1(prm_lockspace_raid_md10)[30537]: WARNING: virtlockd 4684 root   12uw  REG   9,10        0 124945 /var/lib/libvirt/lockd/lvmvolumes/6X7qr3-GXDN-zjMo-vwF2-2MeG-vftx-XzFxOb
> Jan 11 15:54:31 h18 Raid1(prm_lockspace_raid_md10)[30550]: WARNING: virtlockd 4684 root   13uw  REG   9,10        0 124946 /var/lib/libvirt/lockd/lvmvolumes/VaKRkB-ap2u-flZm-1RDY-Ba5u-222P-cL3c1A
> 
> (virtlockd.socket is enabled in systemd)
> So how do you implement clusterwide virtlockd?

I saw you set up RA with Raid1, so I guess you set up a shared raid1 array.
Why could you try mdcluster to directly set up a cluster raid1?

> 
> Regards,
> Ulrich
> 
> 
> 
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