[Users] CentOS 6 and multiple ISCSI interfaces/multipath

[Dan Yasny]

This is an old issue with EQL, best practice is to have different iSCSI
paths on different subnets or VLANs, and to login to every iSCSI portal
when you create the storage domain.

Alternatively, you can use bonds of course


On Thu, Jun 13, 2013 at 4:41 PM, Martin Goldstone <m.j.goldstone at keele.ac.uk
> wrote:

> Hi all,
>
> I've recently started looking at oVirt to provide the next iteration of
> our virtualization infrastructure, as we have recently acquired some ISCSI
> storage. Up to now, we've been using KVM managed by libvirt/virt-manager
> locally on each of our hosts, using direct attached storage, which was
> obviously less than ideal.
>
> In setting it all up, I've hit a bit of a snag. We've got 4 GbE network
> interfaces on our pilot host (running vdsm on CentOS 6.4) which are
> connected to our storage arrays (equallogic). I've created 4 interfaces
> with iscsiadm for these and bound them, but when setting up the discs in
> oVirt, I've not seen a way of telling it which interfaces to use. The node
> makes the connection to the target successfully, but it seems its only
> connecting via the "default" iscsi interface, and not making a connection
> via each interface that I've defined. Obviously this means I can't use
> multipath, and being only GbE interfaces it means I'm not getting the
> performance I should.
>
> I've done some searching via Google, but I've not really found any thing
> that helps. Perhaps I've missed something, but can anyone give me any
> pointers for getting this to work across multiple interfaces?
>
> Thanks?
>
> Martin
>
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