[Gluster-users] Simulate split-brain on gluster 3.6
bturner at redhat.com
Mon Feb 16 20:00:47 UTC 2015
----- Original Message -----
> From: "Félix de Lelelis" <felix.delelisdd at gmail.com>
> To: gluster-users at gluster.org
> Sent: Monday, February 16, 2015 3:59:05 AM
> Subject: [Gluster-users] Simulate split-brain on gluster 3.6
> I am simulating a split brain condition on my cluster but I don't be able it.
> I have disconnected the nodes and creating a file with the same name and
> different contents but always the self-heal process take the last copy of
> the file.
> How can create thos condition?
1. Kill both brick processes
2. Edit the changelog on both files on the backend, make them different:
getfattr -d -e hex -m "trusted.afr." <my file>
You should see something like:
Next set them to values that clash:
setfattr -n "trusted.afrGLUSTER-SHARE-client-0" -v 0x000000000000000200000000
setfattr -n "trusted.afrGLUSTER-SHARE-client-1" -v 0x000000000000000300000000
setfattr -n "trusted.afrGLUSTER-SHARE-client-0" -v 0x000000000000000300000000
setfattr -n "trusted.afrGLUSTER-SHARE-client-1" -v 0x000000000000000200000000
3. Restart both brick processes.
4. Gluster v heal <my vol> info split-brain
I haven't done this for a while but IIRC those command will get you there. The -v syntax may not be correct on the setfattr, but this should get you going.
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