On Wed, Mar 8, 2017 at 2:18 AM, Gurucharan Shetty <g...@ovn.org> wrote:
> There are multiple reasons why a interface can exist
> in the Open vSwitch database but not exist in the system.
> For e.g, a restart of a host after a system crash. Ideally,
> whoever added the interface in the Open vSwitch database
> should remove those interfaces. But that usually does not
> happen in practise. Based on experience, I have observerd

practice and observed

> that on any long lasting OVS installation there are always
> a couple of stale interfaces.
>
> When a stale interface remains in the Open vSwitch database
> and the container/VM initially backing that stale interface
> is moved to a different machine, the two ovn-controllers
> start over-writing the OVN-SB's port_binding table in a loop.
>
> This situation can be avoided, if ovn-controller only binds
> the interfaces that actually have a valid 'ofport'.
>
> Signed-off-by: Gurucharan Shetty <g...@ovn.org>

This sounds reasonable to me.

Acked-by: Russell Bryant <russ...@ovn.org>
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