SCST iSCSI OCF Update Released

I've just released an update for my iSCSI SCST OCF Resource Agents.

This release improves reliability during migration under high IO pressure and solves problem of unmanaged/failed LUN resources issuing crm node standby/online commands.

Download is available from my Github account ...

SCST iSCSI Resource agents for pacemaker.

Inspired by Openfiler I built my own DIY Highly Available SAN using Pacemaker, DRBD, LVM and SCST.
 
My current setup is:
- Two servers running gentoo
- a DRBD device in single primary
- a floating IP address
- an iSCSI Target with one LUN pointing straight to the DRBD device (vdisk_fileio, nv_cache).

The cib looks like:

node isan01 \
    attributes standby="off"
node isan02 \
    attributes standby="off"
primitive DRBD_VG1 ocf:linbit:drbd \
    params drbd_resource="ISCSIVG1" \
    op monitor interval="29" role="Master" \
    op monitor interval="31" role="Slave"
primitive ISCSI_IP1 ocf:heartbeat:IPaddr2 \
    params ip="192.168.100.20" \
    op monitor interval="10s"
primitive ISCSI_LUN_LUN10 ocf:scst:SCSTLun \
    params target_iqn="iqn.2012-02.com.


isan:vdisk.lun10" lun="0" path="/dev/drbd/by-res/DRBD_VG1" handler="vdisk_fileio" device_name="VDISK-LUN10" additional_parameters="nv_cache=1" \
    op monitor interval="10s"
primitive ISCSI_TGT_LUN10 ocf:scst:SCSTTarget \
    params iqn="iqn.2012-02.com.isan:vdisk.lun10" portals="192.168.100.20" \
    op monitor interval="10s" timeout="60s"
group GR_ISCSIVG1 ISCSI_TGT_LUN10 ISCSI_LUN_LUN10 ISCSI_IP1
ms MS_DRBD_VG1 DRBD_VG1 \
    meta master-max="1" master-node-max="1" clone-max="2" clone-node-max="1" notify="true"
colocation CO_ISCSI_ON_DRBD_VG1 inf: GR_ISCSIVG1 MS_DRBD_VG1:Master 
order OR_TARGET_BEFORE_VG1 inf: CL_ISCSI_TGT_LUN1:start GR_ISCSIVG1:start
order OR_DRBD_BEFORE_VG1 inf: MS_DRBD_VG1:promote GR_ISCSIVG1:start
property $id="cib-bootstrap-options" \
    dc-version="1.0.9-da7075976b5ff0bee71074385f8fd02f296ec8a3" \
    cluster-infrastructure="openais" \
    expected-quorum-votes="2" \
    stonith-enabled="false" \
    no-quorum-policy="ignore" \
    default-action-timeout="240"
rsc_defaults $id="rsc-options" \
    resource-stickiness="200"



Now I'm testing it  using vmware ESXi 5 as initiator. Seems working.

You can download them from my Github account ...

... and put them in /usr/lib/ocf/resource.d/scst.

UPDATE

SCST resource agent are now included in head revision of SCST project.
I'm just finished writing a master/slave version of SCSTLun, suitable only for iSCSI vdisk.
In the next days I'll test it and soon publish a little howto :)