On 9/18/2018 10:51 AM, Lars Ellenberg wrote:
On Thu, Sep 13, 2018 at 04:36:54PM -0400, Daniel Ragle wrote:
Anybody know where I need to start looking to figure this one out:
notify-split-brain.sh[153967]: Environment variable $DRBD_PEER not found
(this is normally passed in by drbdadm).
I have a split-brain situation and apparently this notification script tried
to run but failed.
This is in a pacemaker setup with ocf:linbit:drbd controlling DRBD.
# drbdadm --version
DRBDADM_BUILDTAG=GIT-hash:\ fed9a1df82015e52c14c912fa4b93336e2ab4fcc\ build\
by\ mockbuild@\,\ 2018-04-20\ 19:30:46
DRBDADM_API_VERSION=2
DRBD_KERNEL_VERSION_CODE=0x09000e
DRBD_KERNEL_VERSION=9.0.14
DRBDADM_VERSION_CODE=0x090301
DRBDADM_VERSION=9.3.1
Yup, sorry, even though apparently they are still documented in the UG,
those "notify*.sh" example scripts are not fit for DRBD 9 :-(
You want to configure proper fencing anyways,
to *avoid* split brain instead of being "maybe"
(or maybe not) notified by email.
Yah, in fact it was somewhere in the process of trying to get fencing
configured (and testing) that I managed to end up with the split-brain.
Unfortunately (see below) I don't know exactly what I did to trigger it.
For now, if you feel comfortable patching the script,
you could try adding something like this:
if [[ $DRBD_PEER_NODE_ID ]] ; then
k=DRBD_NODE_ID_${DRBD_PEER_NODE_ID};
v=${!k};
[[ $v ]] && DRBD_PEER=$v;
fi
Looks like it should work, I tried adding it, but now I can't figure out
how to test it. I tried:
drbdadm split-brain r0
And that gives me the same problem, as evidently that test doesn't set
any of the DRBD_PEER vars, only:
DRBD_CONF
DRBD_LL_DISK
DRBD_MINOR
DRBD_MY_NODE_ID
DRBD_NODE_ID_0
DRBD_NODE_ID_1
DRBD_RESOURCE
DRBD_VOLUME
And now of course I can't figure out how to manually create a
split-brain for testing. Tried dropping the network interface while both
nodes were up and primary, but that doesn't seem to be enough. Is there
a simple way to test?
_______________________________________________
drbd-user mailing list
[email protected]
http://lists.linbit.com/mailman/listinfo/drbd-user
