[openstack-dev] [neutron] Clear all flows when ovs agent start? why and how avoid?

Hly henry4hly at gmail.com
Wed Oct 29 12:25:06 UTC 2014



Sent from my iPad

On 2014-10-29, at 下午8:01, Robert van Leeuwen <Robert.vanLeeuwen at spilgames.com> wrote:

>>> I find our current design is remove all flows then add flow by entry, this
>>> will cause every network node will break off all tunnels between other
>>> network node and all compute node.
>> Perhaps a way around this would be to add a flag on agent startup
>> which would have it skip reprogramming flows. This could be used for
>> the upgrade case.
> 
> I hit the same issue last week and filed a bug here:
> https://bugs.launchpad.net/neutron/+bug/1383674
> 
> From an operators perspective this is VERY annoying since you also cannot push any config changes that requires/triggers a restart of the agent.
> e.g. something simple like changing a log setting becomes a hassle.
> I would prefer the default behaviour to be to not clear the flows or at the least an config option to disable it.
> 

+1, we also suffered from this even when a very little patch is done

> 
> Cheers,
> Robert van Leeuwen
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