Hello Christiaan,
thank you for your detailed report.
On a test cluster, I was able to reproduce the situation where node A
stays "Inconsistent" after resyncing from node B, and node C refuses to
connect to node A. This seems to be a generic problem, not related to
the hard crash of node A, but related to the fact that node A is "weakly
connected" at the time of the resync ("weak" meaning that it is not
directly connected to the "Primary", which would be impossible in this
case, because the primary node is a diskless client).
We are currently investigating this issue.
By the way, recovery of a failed resource (such as resolving a split
brain) can be done directly through the drbd-utils without having to
perform additional actions in drbdmanage, so your use of drbdmanage and
the drbd-utils in the logs you posted appears to be correct.
Best regards,
--
: Robert Altnoeder
: LINBIT | Your Way to High Availability
:
: http://www.linbit.com
DRBD® and LINBIT® are registered trademarks of LINBIT.
On 06/29/2015 09:26 PM, Christiaan den Besten wrote:
Hi !
Just posted this on the drbd-dev list, but I think it might be better for
drbd-users to share with others:
I just started testing the (official) drbd9 modules and tools on thee CentOS 7
VMx (running on Xen Hypervisor) in PV mode.
My DRBD ‘cluster’ has 3 nodes :
cluster1-a.storage.as41887.net
cluster1-b.storage.as41887.net
cluster1-c.storage.as41887.net
[...snip...]
[root@cluster1-a ~]# drbdadm status | grep 'testvm_prolocation_net' -A 6
testvm_prolocation_net role:Secondary
disk:Inconsistent
cluster1-b.storage.as41887.net role:Secondary
replication:SyncTarget peer-disk:UpToDate done:91.61
cluster1-c.storage.as41887.net connection:Connecting
[...snip...]
Above steps where a replay I did today after having seen this behaviour last
night. So it seems to be reproducible. Also wondering if the ‘recover’ steps
should be done though drbdmanage as well? Can’t seem to find any complete
documentation on drbdmanage besides the man-page.
Yours,
Chris
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