[Openstack] How to achieve HA and Scalability for Neutron
Clint Byrum
clint at fewbar.com
Thu Dec 26 17:54:04 UTC 2013
Excerpts from Jay Pipes's message of 2013-12-26 08:58:10 -0800:
> On 12/26/2013 07:43 AM, skywalker.nick at gmail.com wrote:
> > Hi stackers,
> > I'm preparing for an OpenStack cloud in the production system. I've
> > achieved HA and load balancing for most of the components to a certain
> > degree.
> > Finally I find it hard for Neutron to do such configuration. Are there
> > any ways to run multiple l3-agents and dhcp-agents and cluster them
> > together?
>
> Right, the Neutron L3 agent is the only OpenStack service that is not
> stateless, and therefore you cannot use traditional load-balancing
> across a set of identical nodes.
>
> That said, there's nothing wrong with running multiple L3 nodes, with
> routers for different tenants hosted on different L3 agents. We do this
> successfully in our deployment using a custom Neutron scheduler that my
> colleague Alan Meadows wrote [1] and a Python script (also written by
> Alan) that runs in cron looking for failures on an L3 agent and if
> found, moves the routers from the failed node to a working one. [2]
>
This sounds pretty great Jay. Do you have plans to submit it to Neutron
as a standard feature? Pretty much everybody needs this.
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