[ovs-dev] [PATCH 22/22] ovn: Change strategy for tunnel keys.

Ben Pfaff blp at nicira.com
Tue Jul 28 15:42:36 UTC 2015


On Wed, Jul 22, 2015 at 05:17:22PM +0000, Chandran, Sugesh wrote:
> I am just trying out this new patches in my OVN setup.
> This setup has two logical network span across two nodes/Chassis. 
> I found two  issues with the new patch set as below
> 1) The controller cannot start properly due to the outdated Southbound DB. Do we have any provision in OVN to update the DB and its contents for schema changes such this? 
> If not how does this impact the OVN upgrade/downgrade functionality in the future??

Of course we'll add support for upgrading from one OVN version to
another.  It's not there yet.

(I'll note that OVSDB has pretty good support for upgrading databases.
We'll probably use that.)

> 2) As a workaround, I started the OVN with empty DB and populated everything from scratch, which works fine. But the OVS  forwarding rules are not populated properly in the datapath.
> I noticed that the traffic between VMs in same node dropped because there is no rule created to process it, at the same time the traffic between VMs in different node(using geneve tunnel) flows perfectly. 
> Please note, The rules are programmed correctly when I tested the same two node OVN setup without these patches before. 

I can believe that there are bugs right now.  I'm working on writing
end-to-end tests for OVN; I suspect that those will fix many bugs, and
prevent many more new bugs from ever getting into OVN.



More information about the dev mailing list