[DRBD-user] Split brain when starting resources by Pacemaker

[Carlos Xavier]

Hi.

Since there was no one hint to solve this trouble, the only temporary 
solution I found to allow me to continue with the cluster configuration
was wipe out all the related DRBD configuration from the crm and start the 
DRBD resources by the /etc/init.d/drbd init script.

If someone have another solution I´ll be glad to hear about.

Kind regards,
Carlos.


----- Original Message ----- 
From: "Carlos Xavier" <cbastos at connection.com.br>
To: <drbd-user at lists.linbit.com>
Sent: Friday, August 24, 2012 9:56 AM
Subject: [DRBD-user] Split brain when starting resources by Pacemaker


> Hi.
>
> Im trying to setup a two node cluster with two DRBD resources that will be 
> working with OCFS2.
>
> The configuration is :
> running on OpenSuse 12.1
> kernel 2.6.37.6-101-desktop - I had to downgrade it as I had trouble with 
> DRBD and the original kernel before.
> DRBD version drbd-8.3.9-
> Pacemaker version pacemaker-1.1.6
>
> If I start the DRBD with the initscript of the system everything works 
> fine and we get both resources started as primary/primary.
>
> apolo:~ # cat /proc/drbd
> version: 8.3.9 (api:88/proto:86-95)
> srcversion: A67EB2D25C5AFBFF3D8B788
> 0: cs:Connected ro:Primary/Primary ds:UpToDate/UpToDate C r-----
> ns:0 nr:0 dw:0 dr:672 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:0
> 1: cs:Connected ro:Primary/Primary ds:UpToDate/UpToDate C r-----
> ns:0 nr:0 dw:0 dr:680 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:0
>
> When the start of the resources is configured on the cluster, the 
> resources arent properly started at a random base. It ends
> up with a split brain at one of the resouces, although the crm says its 
> all ok because there is at least one resource im primary state but 
> Standalone.
>
> apolo:~ # crm resource
> crm(live)resource# status
> Master/Slave Set: msDRBD_0 [resDRBD_0]
> Masters: [ apolo diana ]
> Master/Slave Set: msDRBD_1 [resDRBD_1]
> Masters: [ apolo diana ]
>
> apolo:~ # cat /proc/drbd
> version: 8.3.9 (api:88/proto:86-95)
> srcversion: A67EB2D25C5AFBFF3D8B788
> 0: cs:Connected ro:Primary/Primary ds:UpToDate/UpToDate C r-----
> ns:0 nr:0 dw:0 dr:672 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:0
> 1: cs:StandAlone ro:Primary/Unknown ds:UpToDate/DUnknown r-----
> ns:0 nr:0 dw:0 dr:680 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:0
> Here are my configuration files for the DRBD resources and the cluster
>
> https://dl.dropbox.com/u/96446079/backup.res
> https://dl.dropbox.com/u/96446079/export.res
> https://dl.dropbox.com/u/96446079/crm_resources.txt
>
> I even tryed tho add some delay on the start/stop process but with no 
> results
>
> op start interval="0" timeout="240" \
> op stop interval="0" timeout="100" \
>
> Can you please help me to solve this issue?
>
> Best regards,
> Carlos
>
>
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>