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

[Julian Chesterfield <julian.chesterfield@xxxxxxxxxxxxx>]

Hi George,

You can specify a comma separated list for the iSCSI target in XCP. If 
both targets advertise the same IQN then you can specify that IQN 
explicitly as the targetIQN parameter. Alternatively you can select the 
wildcard entry '*' which will connect to all advertised sessions on 
every IP address specified in the comma separated list.
Thanks,
Julian

On 16/05/11 17:05, George Shuklin wrote:
> 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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