[Pacemaker] Help with DRBD resources on Pacemaker
Carlos Xavier
cbastos at connection.com.br
Thu Aug 23 19:17:03 EDT 2012
Please forgive me for the confusing reply I sent before. My crappy email
cliente isn´t adding the char > on the original message so Ill do it by hand
:-(
> Hi,
>
> I would just try to remove the last 2 lines in the "net" column of DRBD
> Config. I had the same behavior with the option "ping-timeout" in the
> "net" column.
> Starting DRBD via init-script worked but not managed via pacemaker.
> Just try it!
> I am still investigating the reason for that.
>
I tryed removing the lines you sugested but the results are the same :-(
> Additionaly i would remove the line with "become primary on both " in the
> DRBD Config since Pacemaker will promote the DRBD Resources itself to
> Master/Primary.
>
I need this statement because it will be running a OCFS2 filesystem and both
hosts will be using those directories for HTTP/HTTPS services
> Regards
>
> Matthias
>
Regards,
Carlos.
> Carlos Xavier <cbastos at connection.com.br> schrieb:
>
>
> Hi.
>
> I configured one cluster using one resouce of DRBD and it works fine,
> althoug I had to downgrade the kernel to the version 2.6.37.6 to get it
> stable.
> Now I´m configuring another cluster but two DRBD resources are required.
> They were created and if I use the system init script to start them both
> get
> up
>
> 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 I try to start them using the cluster stack i get some random results
> like this one:
>
> 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:WFConnection ro:Primary/Unknown ds:UpToDate/DUnknown 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
>
> crm(live)resource# status
> Master/Slave Set: msDRBD_0 [resDRBD_0]
> Masters: [ apolo diana ]
> Master/Slave Set: msDRBD_1 [resDRBD_1]
> Masters: [ apolo ]
> Stopped: [ resDRBD_1:1 ]
>
> This was solved with a cleanup on the resource resDRBD_1:1
>
> crm(live)resource# cleanup resDRBD_1:1
> Cleaning up resDRBD_1:1 on apolo
> Cleaning up resDRBD_1:1 on diana
> Waiting for 3 replies from the CRMd... OK
> 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: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
>
> Trying to test a litle more the configuration I took down the resources
> and
> tryed to get them up again
>
> crm(live)resource# stop resDRBD_1
> crm(live)resource# stop resDRBD_0
> crm(live)resource# status
> Master/Slave Set: msDRBD_0 [resDRBD_0]
> Stopped: [ resDRBD_0:0 resDRBD_0:1 ]
> Master/Slave Set: msDRBD_1 [resDRBD_1]
> Stopped: [ resDRBD_1:0 resDRBD_1:1 ]
> crm(live)resource# start resDRBD_1
> crm(live)resource# start resDRBD_0
> crm(live)resource# status
> Master/Slave Set: msDRBD_0 [resDRBD_0]
> Masters: [ apolo diana ]
> Master/Slave Set: msDRBD_1 [resDRBD_1]
> Masters: [ apolo diana ]
>
> The crm says its all ok but if you go on the command line what you see is
> a
> split brain:
>
> apolo:~ # cat /proc/drbd
> version: 8.3.9 (api:88/proto:86-95)
> srcversion: A67EB2D25C5AFBFF3D8B788
> 0: cs:StandAlone ro:Primary/Unknown ds:UpToDate/DUnknown 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
>
> Those are my DRBD resource configurations and the cluster configuration:
> 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
>
> Can you help me to fix this issue?
>
> Best regards,
> Carlos Xavier.
> _______________________________________________
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