[ClusterLabs] Lost access with the volume while ZFS and other resources migrate to other node (reset VM)

[Ken Gaillot]

On Mon, 2023-04-03 at 02:47 +0300, Александр via Users wrote:
> Pacemaker + corosync cluster with 2 virtual machines (ubuntu 22.04,
> 16 Gb RAM, 8 CPU each) are assembled into a cluster, an HBA is
> forwarded to each of them to connect to a disk shelf according to the
> instructions https://netbergtw.com/top-support/articles/zfs-cib /. A 

That looks like a well-thought-out guide. One minor correction, since
Corosync 3, no-quorum-policy=ignore is no longer needed. Instead, set
"two_node: 1" in corosync.conf (which may be automatic depending on
what tools you're using).

That's unlikely to be causing any issues, though.

> ZFS pool was assembled from 4 disks in draid1, resources were
> configured - virtual IP, iSCSITarget, iSCSILun. LUN connected in
> VMware. During an abnormal shutdown of the node, resources move, but 

How are you testing abnormal shutdown? For something like a power
interruption. I'd expect that the node would be fenced, but in your
logs it looks like recovery is taking place between clean nodes.

> at the moment this happens, VMware loses contact with the LUN, which
> should not happen. The journalctl log at the time of the move is
> here: https://pastebin.com/eLj8DdtY. I also tried to build a common
> storage on drbd with cloned VIP and Target resources, but this also
> does not work, besides, every time I move, there are always some
> problems with the start of resources. Any ideas what can be done
> about this? Loss of communication with the LUN even for a couple of
> seconds is already critical.
>  
> corosync-qdevice/jammy,now 3.0.1-1 amd64 [installed]
> corosync-qnetd/jammy,now 3.0.1-1 amd64 [installed]
> corosync/jammy,now 3.1.6-1ubuntu1 amd64 [installed]
> pacemaker-cli-utils/jammy,now 2.1.2-1ubuntu3 amd64
> [installed,automatic]
> pacemaker-common/jammy,now 2.1.2-1ubuntu3 all [installed,automatic]
> pacemaker-resource-agents/jammy,now 2.1.2-1ubuntu3 all
> [installed,automatic]
> pacemaker/jammy,now 2.1.2-1ubuntu3 amd64 [installed]
> pcs/jammy,now 0.10.11-2ubuntu3 all [installed]
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-- 
Ken Gaillot <kgaillot at redhat.com>