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[Xen-API] multipath on 'dual-head' configuration
- To: xen-api@xxxxxxxxxxxxxxxxxxx
- From: George Shuklin <george.shuklin@xxxxxxxxx>
- Date: Mon, 16 May 2011 20:05:39 +0400
- Delivery-date: Mon, 16 May 2011 09:06:36 -0700
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- List-id: Discussion of API issues surrounding Xen <xen-api.lists.xensource.com>
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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