Hi,
I'm trying to figure out how to configure constraints for
ocf:heartbeat:ManageRAID (RAID5) with iSCSI devices.
This is a visual representation of my resources:
A: Initiator_6 |
B: Initiator_7 | --> D: ManageRAID_MD2 --> E: other stuff relying the mounted FS
C: Initiator_8 |
These are the definitions:
primitive Initiator_7 ocf:heartbeat:iscsi \
params portal="172.20.4.12"
target="iqn.2010-10.com.example:storage.drbd.iscsi040501" \
op monitor interval="120" timeout="30" depth="0" \
primitive Initiator_8 ocf:heartbeat:iscsi \
params portal="172.20.5.12"
target="iqn.2010-10.com.example:storage.drbd.iscsi060701" \
op monitor interval="120" timeout="30" depth="0" \
primitive Initiator_9 ocf:heartbeat:iscsi \
params portal="172.20.6.12"
target="iqn.2010-10.com.example:storage.drbd.iscsi080901" \
op monitor interval="120" timeout="30" depth="0"
primitive ManageRAID_MD2 ocf:heartbeat:ManageRAID \
params raidname="MD2" \
op monitor interval="10" timeout="0" depth="0"
And here my /etc/HB-ManageRAID
MD2_UUID="dec8980a:3a7eba1a:d36d14f2:9c1f2fea"
MD2_DEV="md2"
MD2_MOUNTPOINT="/mnt/md2"
MD2_MOUNTOPTIONS="noatime"
MD2_LOCALDISKS="/dev/disk/iscsi/d1e1e429899fbd06796f8c9d-part1
/dev/disk/iscsi/38275716e86870dd6c85286a-part1
/dev/disk/iscsi/e101097db6842e0814b1e537-part1"
And the constraints:
<rsc_colocation id="RAID_MD2" score="INFINITY">
<resource_set id="RAID_MD2-0" sequential="false">
<resource_ref id="Initiator_7"/>
<resource_ref id="Initiator_8"/>
<resource_ref id="Initiator_9"/>
</resource_set>
<resource_set id="RAID_MD2-1" sequential="true">
<resource_ref id="ManageRAID_MD2"/>
</resource_set>
</rsc_colocation>
When I manually start the Initiators on the same node and then ManageRAID
everything works fine as soon as one of the target goes offline.
So, here my problems:
1) how can I define the constraints so that the resources are automatically
started in the correct order (group is not a good idea... see 2) )?
2) how can I define the constraints so that when one initiators goes offlinte
ManagerRAID stays active (and working)?
3) is it possible to start ManageRAID with just 2 Initiators online?
4) finally, how can I recover from an Initiator failure when it comes again
online?
Thank you.
Bye
Eugene
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