[ClusterLabs] Pacemaker and OCFS2 on stand alone mode

[emmanuel segura]

have you configured the stonith and drbd stonith handler?

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.
>
>
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