[ovirt-users] Best practices for LACP bonds on oVirt

[Yaniv Kaul]

On Wed, Jul 5, 2017 at 7:12 AM, Vinícius Ferrão <ferrao at if.ufrj.br> wrote:

> Adding another question to what Matthias has said.
>
> I also noted that oVirt (and RHV) documentation does not mention the
> supported block size on iSCSI domains.
>
> RHV: https://access.redhat.com/documentation/en-us/red_
> hat_virtualization/4.0/html/administration_guide/chap-storage
> oVirt: http://www.ovirt.org/documentation/admin-guide/chap-Storage/
>
> I’m interested on 4K blocks over iSCSI, but this isn’t really widely
> supported. The question is: oVirt supports this? Or should we stay with the
> default 512 bytes of block size?
>

It does not.
Y.


>
> Thanks,
> V.
>
> On 4 Jul 2017, at 09:10, Matthias Leopold <matthias.leopold at meduniwien.
> ac.at> wrote:
>
>
>
> Am 2017-07-04 um 10:01 schrieb Simone Tiraboschi:
>
> On Tue, Jul 4, 2017 at 5:50 AM, Vinícius Ferrão <ferrao at if.ufrj.br <
> mailto:ferrao at if.ufrj.br <ferrao at if.ufrj.br>>> wrote:
>    Thanks, Konstantin.
>    Just to be clear enough: the first deployment would be made on
>    classic eth interfaces and later after the deployment of Hosted
>    Engine I can convert the "ovirtmgmt" network to a LACP Bond, right?
>    Another question: what about iSCSI Multipath on Self Hosted Engine?
>    I've looked through the net and only found this issue:
>    https://bugzilla.redhat.com/show_bug.cgi?id=1193961
>    <https://bugzilla.redhat.com/show_bug.cgi?id=1193961>
>    Appears to be unsupported as today, but there's an workaround on the
>    comments. It's safe to deploy this way? Should I use NFS instead?
> It's probably not the most tested path but once you have an engine you
> should be able to create an iSCSI bond on your hosts from the engine.
> Network configuration is persisted across host reboots and so the iSCSI
> bond configuration.
> A different story is instead having ovirt-ha-agent connecting multiple
> IQNs or multiple targets over your SAN. This is currently not supported for
> the hosted-engine storage domain.
> See:
> https://bugzilla.redhat.com/show_bug.cgi?id=1149579
>
>
> Hi Simone,
>
> i think my post to this list titled "iSCSI multipathing setup troubles"
> just recently is about the exact same problem, except i'm not talking about
> the hosted-engine storage domain. i would like to configure _any_ iSCSI
> storage domain the way you describe it in https://bugzilla.redhat.com/
> show_bug.cgi?id=1149579#c1. i would like to do so using the oVirt "iSCSI
> Multipathing" GUI after everything else is setup. i can't find a way to do
> this. is this now possible? i think the iSCSI Multipathing documentation
> could be improved by describing an example IP setup for this.
>
> thanks a lot
> matthias
>
>
>
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