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On Wed, Sep 02, 2015 at 03:42:20PM -0400, Jeff Peeler wrote:
> Hi folks,
> 
> I'm currently looking at supporting Ironic in the Kolla project [1], but
> was unsure if it would be possible to run separate instances of nova
> compute and controller (and scheduler too?) to enable both baremetal and
> libvirt type deployments. I found this mailing list post from two years ago
> [2], asking the same question. The last response in the thread seemed to
> indicate work was being done on the scheduler to support multiple
> configurations, but the review [3] ended up abandoned.
> 
> Are the current requirements the same? Perhaps using two availability zones
> would work, but I'm not clear if that works on the same host.

At Rackspace we run Ironic in its own cell, and use cells filters to
direct builds to the right place.

The other option that supposedly works is host aggregates. I'm not sure
host aggregates supports running two scheduler instances (because you'll
want different filters), but maybe it does?

// jim