Re: [Xen-users] xen and iscsi

["Austin S. Hemmelgarn" <ahferroin7@xxxxxxxxx>]

On 2016-12-11 14:39, Christian Schneider wrote:
> Hey,
>
> I want to use Xen with iscsi as storage backend (FreeNAS). My problem is
> that I cannot find any information about how to configure a domU to use it.
>
> I am looking for something like:
>
> disk        = [
>
>                 'iscsi:???, xvda1, w'
>
>                ]
>
>
> Is this possible?
As far as I know, no (at least, not for PV domains, it might work for 
HVM domains), but there are two pretty easy solutions:
1. Configure Domain-0 (or possibly a storage stub-domain) to connect to 
the iSCSI devices, then point Xen at the local device nodes.  This has 
some slight efficiency issues because of Domain-0 needing to do two 
translations (iSCSI to local-block, then local-block to Xen), but is 
easy to set up and doesn't need the user domains to even support iSCSI.
2. Configure the user domains to use the iSCSI devices directly.  This 
is the more efficient option, but is not quite as easy to do, especially 
for PV domains.


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