Re: [Xen-users] xen and iscsi

[Simon Hobson <linux@xxxxxxxxxxxxxxxx>]

Christian Schneider <christian.schneider@xxxxxxxxxxxxxxx> wrote:

> 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? Thx

You can use a device by path. Configure your host as an iSCSI initiator, and 
reference the appropriate /dev/disk/by-path device.
Upsides: volume available to host when not in use by guest (useful for 
troubleshooting etc).
Downsides: Needs iSCSi setup in host.

Or you can do it in the guest, and have the guest run the iSCSI initiator.
Upsides: Doesn't need iSCSI in host
Downsides: Volume not accessible by host, may be performance issues depending 
on network config (has the single threaded networking in Dom0 been "fixed" ?)


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