[ClusterLabs] RES: Pacemaker and OCFS2 on stand alone mode

[Carlos Xavier]

Tank you for the fast reply

> 
> have you configured the stonith and drbd stonith handler?
> 

Yes. they were configured.
The cluster was running fine for more than 4 years, until we loose one host by power supply failure.
Now I need to access the files on the host that is working.

> 2016-07-07 16:43 GMT+02:00 Carlos Xavier <cbastos at connection.com.br>:
> > Hi.
> > We had a Pacemaker cluster running OCFS2 filesystem over a DRBD device and we completely lost one of
> the hosts.
> > Now I need some help to recover the data on the remaining machine.
> > I was able to load the DRBD module by hand bring up the devices using the drbdadm command line:
> > apolo:~ # modprobe drbd
> > apolo:~ # cat /proc/drbd
> > version: 8.3.9 (api:88/proto:86-95)
> > srcversion: A67EB2D25C5AFBFF3D8B788
> >
> > apolo:~ # drbd-overview
> >   0:backup
> >   1:export
> > apolo:~ # drbdadm attach backup
> > apolo:~ # drbdadm attach export
> > apolo:~ # drbd-overview
> >   0:backup  StandAlone Secondary/Unknown UpToDate/DUnknown r-----
> >   1:export  StandAlone Secondary/Unknown UpToDate/DUnknown r-----
> > apolo:~ # drbdadm primary backup apolo:~ # drbdadm primary export apolo:~ # drbd-overview
> >   0:backup  StandAlone Primary/Unknown   UpToDate/DUnknown r-----
> >   1:export  StandAlone Primary/Unknown UpToDate/DUnknown r-----
> >
> > We have these resources and constraints configured:
> > primitive resDLM ocf:pacemaker:controld \
> >         op monitor interval="120s"
> > primitive resDRBD_0 ocf:linbit:drbd \
> >         params drbd_resource="backup" \
> >         operations $id="resDRBD_0-operations" \
> >         op start interval="0" timeout="240" \
> >         op stop interval="0" timeout="100" \
> >         op monitor interval="20" role="Master" timeout="20" \
> >         op monitor interval="30" role="Slave" timeout="20"
> > primitive resDRBD_1 ocf:linbit:drbd \
> >         params drbd_resource="export" \
> >         operations $id="resDRBD_1-operations" \
> >         op start interval="0" timeout="240" \
> >         op stop interval="0" timeout="100" \
> >         op monitor interval="20" role="Master" timeout="20" \
> >         op monitor interval="30" role="Slave" timeout="20"
> > primitive resFS_BACKUP ocf:heartbeat:Filesystem \
> >         params device="/dev/drbd/by-res/backup" directory="/backup"
> > fstype="ocfs2" options="rw,noatime" \
> >         op monitor interval="120s"
> > primitive resFS_EXPORT ocf:heartbeat:Filesystem \
> >         params device="/dev/drbd/by-res/export" directory="/export"
> > fstype="ocfs2" options="rw,noatime" \
> >         op monitor interval="120s"
> > primitive resO2CB ocf:ocfs2:o2cb \
> >         op monitor interval="120s"
> > group DRBD_01 resDRBD_0 resDRBD_1
> > ms msDRBD_01 DRBD_01 \
> >         meta resource-stickines="100" notify="true" master-max="2"
> > interleave="true" target-role="Started"
> > clone cloneDLM resDLM \
> >         meta globally-unique="false" interleave="true"
> > target-role="Started"
> > clone cloneFS_BACKUP resFS_BACKUP \
> >         meta interleave="true" ordered="true" target-role="Started"
> > clone cloneFS_EXPORT resFS_EXPORT \
> >         meta interleave="true" ordered="true" target-role="Started"
> > clone cloneO2CB resO2CB \
> >         meta globally-unique="false" interleave="true"
> > target-role="Started"
> > colocation colDLMDRBD inf: cloneDLM msDRBD_01:Master colocation
> > colFS_BACKUP-O2CB inf: cloneFS_BACKUP cloneO2CB colocation
> > colFS_EXPORT-O2CB inf: cloneFS_EXPORT cloneO2CB colocation colO2CBDLM inf: cloneO2CB cloneDLM order
> ordDLMO2CB 0: cloneDLM cloneO2CB order ordDRBDDLM 0: msDRBD_01:promote cloneDLM:start order ordO2CB-
> FS_BACKUP 0: cloneO2CB cloneFS_BACKUP order ordO2CB-FS_EXPORT 0:
> > cloneO2CB cloneFS_EXPORT
> >
> > As the DRBD devices were brought up by hand, Pacemaker doesn't
> > recognize they are up and so it doesn't start the DLM resource and all resources that depends on it
> stay stopped.
> > Is there any way I can circumvent this issue?
> > Is it possible to bring the OCFS2 resources working on standalone mode?
> > Please, any help will be very welcome.
> >
> > Best regards,
> > Carlos.
> >
> >