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