[ovirt-users] Communicate between the guest vm's hosted on, different hosts on different data centres using OVS

[Charles Tassell]

Hi Suresh,

   You would need to connect the two OVN instances somehow.  If it's 
just two single hosts, I think the easiest way would be to create a VPN 
connection between the two hosts with OpenVPN or the like and then add 
the tun/tap interfaces into the OVN on each box.  You might run into 
problems if you start adding more hosts though, as if the host with the 
VPN goes down it would disconnect the two datacenters.

   If the two datacenters are on the same physical network (ie, you just 
mean oVirt datacenter and not different colocation providers) then 
adding a VLAN to the NICs connected to the OVN interface would work.  
You would probably have to setup some sort of channel bonding/LACP as 
you add more hosts, but OVN should be able to handle that simply enough.

On 2017-04-20 07:33 PM, users-request at ovirt.org wrote:
> Date: Thu, 20 Apr 2017 14:43:26 -0400
> From: Linov Suresh <linov.suresh at gmail.com>
> To: users at ovirt.org
> Subject: [ovirt-users] Communicate between the guest vm's hosted on
> 	different hosts on different data centres using OVS
> Message-ID:
> 	<CALdvvBP6MwbKa-P=q-UeZHMayZ3YPRpjersL0u=2srG=pcCnkQ at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Hello,
>
> I have configured OVS network on oVirt 4.1.1, following the document
> https://www.ovirt.org/blog/2016/11/ovirt-provider-ovn/
>
> I have created OVN Provider, and created new Logical Network for OVS using
> OVN Provider. I have synced the network also selected OVS when I created
> the cluster.
>
> I have two data centres and each data centre has one host each.
>
> Now I have created VM's selecting OVS network (not ovirtmgmt). VM's in the
> same data centre can talk to each other.
>
> How do i make the VM's hosted on different data centre can talk to each
> other?
>
> Appreciate your help in advance,
>
> Sincerely,
>
> Suresh.