[openstack-dev] [ptl][tc] Accessible upgrade support

Sean Dague sean at dague.net
Sat Oct 7 09:31:30 UTC 2017

On 10/06/2017 07:23 PM, Kevin Benton wrote:
>  >The neutron story is mixed on accessable upgrade, because at least in 
> some cases, like ovs, upgrade might trigger a network tear down / 
> rebuild that generates an outage (though typically a pretty small one).
> This shouldn't happen. If it does it should be reported as a bug. All 
> existing OVS flows are left in place during agent initialization and we 
> don't get rid of the old ones until the agent finishes setting up the 
> new ones.

I thought it was literally a problem with the daemon restart where it is 
stateful and does a teardown / rebuild when started. I'd be happy to be 
wrong about that, but was told in the past that it was just an OVS 


Sean Dague

More information about the OpenStack-dev mailing list