[openstack-dev] [Neutron][L3] Stop agent scheduling without topping sevices

Carl Baldwin carl at ecbaldwin.net
Thu Jan 8 23:09:10 UTC 2015

I added a link to @Jack's post to the ML to the bug report [1].  I am
willing to support @Itsuro with reviews of the implementation and am
willing to consult if you need and would like to ping me.


[1] https://bugs.launchpad.net/neutron/+bug/1408488

On Thu, Jan 8, 2015 at 7:49 AM, McCann, Jack <jack.mccann at hp.com> wrote:
> +1 on need for this feature
> The way I've thought about this is we need a mode that stops the *automatic*
> scheduling of routers/dhcp-servers to specific hosts/agents, while allowing
> manual assignment of routers/dhcp-servers to those hosts/agents, and where
> any existing routers/dhcp-servers on those hosts continue to operate as normal.
> The maintenance use case was mentioned: I want to evacuate routers/dhcp-servers
> from a host before taking it down, and having the scheduler add new routers/dhcp
> while I'm evacuating the node is a) an annoyance, and b) causes a service blip
> when I have to right away move that new router/dhcp to another host.
> The other use case is adding a new host/agent into an existing environment.
> I want to be able to bring the new host/agent up and into the neutron config, but
> I don't want any of my customers' routers/dhcp-servers scheduled there until I've
> had a chance to assign some test routers/dhcp-servers and make sure the new server
> is properly configured and fully operational.
> - Jack
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