[Xen-API] multipath on 'dual-head' configuration

[George Shuklin <george.shuklin@xxxxxxxxx>]

Good day.

Found I unable to setup multipath (XCP 0.5) with two separate hosts
connecting to same storage device.

Every iscsi target has been sent only it own ip-addresses for target.

>From generic linux machine it looks like:

10.1.4.2:3260,1 iqn.2011-04.test:test.test
10.1.4.102:3260,1 iqn.2011-04.test:test.test

Those IP actually belongs to different machines but allow to access the
same block device.

In usual linux I simply add iscsi login process to startup, multipath
script and it joins paths just by identical serial number and IQN.

In XCP I found I need to serve single portal address with all available
paths (IPs) to target. 

Using ISNS is not very good (i do need to build a HA-cluster for that,
and it seems be little overkill).

That's kinda stuck for me.

Here questions:

Can I somehow say XCP 'do discovery targets (paths) from two portals for
single SR?

If I add multipathed device 'by hand' (f.e. by adding iscsi and
multipath processing to startup scripts), can I add it to XCP as
'shared' resource (regardless it seems be 'local' for xapi)?

Thanks.


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