[ovirt-users] iSCSI Multipath issues

[Uwe Laverenz]

Hi,


Am 19.07.2017 um 04:52 schrieb Vinícius Ferrão:

> I’m joining the crowd with iSCSI Multipath issues on oVirt here. I’m 
> trying to enable the feature without success too.
> 
> Here’s what I’ve done, step-by-step.
> 
> 1. Installed oVirt Node 4.1.3 with the following network settings:
> 
> eno1 and eno2 on a 802.3ad (LACP) Bond, creating a bond0 interface.
> eno3 with 9216 MTU.
> eno4 with 9216 MTU.
> vlan11 on eno3 with 9216 MTU and fixed IP addresses.
> vlan12 on eno4 with 9216 MTU and fixed IP addresses.
> 
> eno3 and eno4 are my iSCSI MPIO Interfaces, completelly segregated, on 
> different switches.

This is the point: the OVirt implementation of iSCSI-Bonding assumes 
that all network interfaces in the bond can connect/reach all targets, 
including those in the other net(s). The fact that you use separate, 
isolated networks means that this is not the case in your setup (and not 
in mine).

I am not sure if this is a bug, a design flaw or a feature, but as a 
result of this OVirt's iSCSI-Bonding does not work for us.

Please see my mail from yesterday for a workaround.

cu,
Uwe