[ovirt-users] iSCSI Multipath issues

[Maor Lipchuk]

Hi Vinícius,

For some reason it looks like your networks are both connected to the same IPs.

based on the  VDSM logs:
      u'connectionParams':[
         {
            u'netIfaceName':u'eno3.11',
            u'connection':u'192.168.11.14',
         },
         {
            u'netIfaceName':u'eno3.11',
            u'connection':u'192.168.12.14',
         }
            u'netIfaceName':u'eno4.12',
            u'connection':u'192.168.11.14',
         },
         {
            u'netIfaceName':u'eno4.12',
            u'connection':u'192.168.12.14',
         }
      ],

Can you try to reconnect to the iSCSI storage domain after
re-initializing your iscsiadm on your host.

1. Move your iSCSI storage domain to maintenance in oVirt by deactivating it

2. In your VDSM host, log out from your iscsi open sessions which are
related to this storage domain
if that is your only iSCSI storage domain log out from all the sessions:
   "iscsiadm -m session -u"

3. Stop the iscsid service:
   "service iscsid stop"

4. Move your network interfaces configured in the iscsiadm to a
temporary folder:
    mv /var/lib/iscsi/ifaces/* /tmp/ifaces

5. Start the iscsid service
   "service iscsid start"

Regards,
Maor and Benny

On Wed, Jul 19, 2017 at 1:01 PM, Uwe Laverenz <uwe at laverenz.de> wrote:
> 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
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