[DRBD-user] ZFS storage backend failed
escario at azylog.net
Fri Feb 9 18:35:47 CET 2018
I'm just doing a lab about zpool as storage backend for DRBD (storing VM images
Right now, it's pretty good once tuned and I've been able to achieve 500MB/s
write speed with just a little curiosity about concurrent write from both
hypervisors cluster but that's not the point here.
To complete resiliancy tests, I simplify unplugged a disk from a node. My toughs
was DRBD was just going to detect ZFS failure and detach the ressources from
But ... nothing. I/O just hangs on VMs ran on the 'failed' node.
My zpool status :
NAME STATE READ WRITE CKSUM
drbdpool UNAVAIL 0 0 0 insufficient replicas
sda UNAVAIL 0 0 0
but drbdadm show this for locally hosted VM (on the failed node) :
and remote VM (on the 'sane' node from failed node point of view) :
So it seems that DRBD didn't detect the I/O failure.
Is there a way to force automatic failover in this case ? I probably missed a
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