Comment 1 for bug 1524320

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Aleksandr Didenko (adidenko) wrote : Re: Nailgun throws Internal Server Error if controllers are in different nodegroups

It looks like we need to update these lines:

https://github.com/openstack/fuel-web/blob/master/nailgun/nailgun/objects/cluster.py#L895-L898

and return cls.get_default_group(instance) if len(nodegroups) > 1. Otherwise it won't be possible to deploy controllers in different racks.