On 5/17/22 16:10, Dumitru Ceara wrote:
> Hi Justin,
> 
> I know it's a while ago since this patch [0][1] made it in OVN but I was
> wondering if you remembered some of the reasons behind doing this.
> 
> More recently, OVN got a new feature to allow the CMS to explicitly
> specify a zone ID to be used for conntrack for gateway routers [2].
> 
> The reason behind that was that, in some cases, ovn-kubernetes shares
> the gateway router conntrack zone with the host [3].
> 
> The fact that an ovn-controller restart flushes the shared zone becomes
> an issue sometimes.  We're trying to see if there's a way to avoid that,
> potentially via an ovn-controller cmdline argument or configuration.
> 
> But before that, I wonder if you know of any CMS that relies on the
> flush-on-use behavior.

Sorry for the noise.  I think we figured out the context and we also
found the bug that was strictly related to conntrack zone ID 0.

I posted a fix for that:

https://patchwork.ozlabs.org/project/ovn/patch/[email protected]/

Regards,
Dumitru

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