[Pacemaker] pacemaker & LIO

[jan.zeller at id.unibe.ch]

dear members of the pacemaker mailing list,

i am using pacemaker on Debian GNU/Linux testing (wheezy) in combination with LIO [1] and DRBD. The setup heavily relies on [2].
After fiddling around I am able to move the iscsi storage from one (storage-)node to the other successfully.

With this setup [3] I unfortunately always need to create the lun mapping manually like this :

/iscsi/iqn.20...:31f4493c3d6c> create mapped_lun=0 tpg_lun=0 Created Mapped LUN 0.
Entering new node /iscsi/iqn.2012-07.org.linux-iscsi.iscsi-storage.i686:sn.d94bc9daa270/tpgt1/acls/iqn.2012-07.lan.xcp1:01:31f4493c3d6c/mapped_lun0

/iscsi/iqn.20...:31f4493c3d6c> create mapped_lun=0 tpg_lun=0 Created Mapped LUN 0.
Entering new node /iscsi/iqn.2012-07.org.linux-iscsi.iscsi-storage.i686:sn.d94bc9daa270/tpgt1/acls/iqn.2012-07.lan.xcp2:02:31f4493c3d6c/mapped_lun0


'targetcli' output before
-----------------------------
/> ls iscsi/iqn.2012-07.org.linux-iscsi.iscsi-storage.i686:sn.d94bc9daa270/
o- iqn.2012-07.org.linux-iscsi.iscsi-storage.i686:sn.d94bc9daa270 ............... [1 TPG]
  o- tpgt1 .................................................................... [enabled]
    o- acls .................................................................... [2 ACLs]
    | o- iqn.2012-07.lan.xcp1:01:31f4493c3d6c ............................ [0 Mapped LUN]
    | o- iqn.2012-07.lan.xcp2:02:31f4493c3d6c ............................ [0 Mapped LUN]
    o- luns ..................................................................... [1 LUN]
    | o- lun0 .............................................. [iblock/r_lun0 (/dev/drbd0)]
    o- portals .............................................................. [2 Portals]
      o- 192.168.8.14:3260 ......................................................... [OK]
      o- 192.168.8.6:3260 .......................................................... [OK]


'targetcli' output after
---------------------------
/> ls iscsi/iqn.2012-07.org.linux-iscsi.iscsi-storage.i686:sn.d94bc9daa270
o- iqn.2012-07.org.linux-iscsi.iscsi-storage.i686:sn.d94bc9daa270 ............... [1 TPG]
  o- tpgt1 .................................................................... [enabled]
    o- acls .................................................................... [2 ACLs]
    | o- iqn.2012-07.lan.xcp1:01:31f4493c3d6c ............................ [1 Mapped LUN]
    | | o- mapped_lun0 ...................................................... [lun0 (rw)]
    | o- iqn.2012-07.lan.xcp2:02:31f4493c3d6c ............................ [1 Mapped LUN]
    |   o- mapped_lun0 ...................................................... [lun0 (rw)]
    o- luns ..................................................................... [1 LUN]
    | o- lun0 .............................................. [iblock/r_lun0 (/dev/drbd0)]
    o- portals .............................................................. [2 Portals]
      o- 192.168.8.14:3260 ......................................................... [OK]
      o- 192.168.8.6:3260 .......................................................... [OK]

Any way to get this working the pacemaker way ?


[3] 

root at iscsi-tgt1:~# crm configure show
node iscsi-tgt1
node iscsi-tgt2
primitive r_DRBD ocf:linbit:drbd \
        params drbd_resource="r0" \
        op monitor interval="10" role="Master" \
        op monitor interval="20" role="Slave" \
        op start interval="0" timeout="240" \
        op stop interval="0" timeout="240"
primitive r_iscsid ocf:heartbeat:iSCSITarget \
        params implementation="lio" portals="192.168.8.6 192.168.8.14" iqn="iqn.2012-07.org.linux-iscsi.iscsi-storage.i686:sn.d94bc9daa270" allowed_initiators="iqn.2012-07.lan.xcp1:01:31f4493c3d6c iqn.2012-07.lan.xcp2:02:31f4493c3d6c"
primitive r_lun0 ocf:heartbeat:iSCSILogicalUnit \
        params implementation="lio" target_iqn="iqn.2012-07.org.linux-iscsi.iscsi-storage.i686:sn.d94bc9daa270" lun="0" path="/dev/drbd0" \
        op monitor interval="30"
primitive r_target lsb:target \
        op monitor interval="30" timeout="30"
primitive r_vIP-1 ocf:heartbeat:IPaddr2 \
        params ip="192.168.8.6" cidr_netmask="255.255.255.248"
primitive r_vIP-2 ocf:heartbeat:IPaddr2 \
        params ip="192.168.8.14" cidr_netmask="255.255.255.248"
group g_iscsi r_target r_iscsid r_lun0
group g_vIP r_vIP-1 r_vIP-2
ms ms_DRBD r_DRBD \
        meta master-max="1" master-node-max="1" clone-max="2" clone-node-max="1" notify="true" target-role="Master"
colocation c0 inf: g_iscsi ms_DRBD:Master g_vIP order o0 inf: ms_DRBD:promote g_iscsi:start property $id="cib-bootstrap-options" \
        dc-version="1.1.7-ee0730e13d124c3d58f00016c3376a1de5323cff" \
        cluster-infrastructure="openais" \
        expected-quorum-votes="2" \
        no-quorum-policy="ignore" \
        stonith-enabled="false" \
        last-lrm-refresh="1343207694"


kind regards,

Jan

[1] http://linux-iscsi.org
[2] www.linbit.com/fileadmin/tech-guides/ha-iscsi.pdf