On 19/11/15 08:38, Ned Rhudy (BLOOMBERG/ 731 LEX) wrote:
Hello operator friends,
We're laying out our 2016 roadmaps now, and one of the projects the
Bloomberg cloud team would like to undertake is migrating from our
legacy nova-network setup to Neutron. Our current networking is pretty
simple, with tenancies getting /25s carved out from a single large
subnet for fixed IPs and floating IPs being assigned from another large
subnet as first-come-first serve. While there's room for improvement, we
are totally fine with the initial Neutron migration replicating as close
to the same user experience as possible; our primary interest now is
just getting to Neutron, then taking on larger overhauls once we're free
to navigate in the Neutron universe.
That being said, there's very little material out there on people
successfully pulling off nova-network to Neutron migrations. References
on the docs wiki to Neutron migration materials are unfinished and
mostly lead to some year-old abandoned changes in Gerrit, and Google
inexorably leads to the same eBay presentation about migrating from
Folsom nova-network to Havana Neutron+NSX SDN. It has some interesting
and useful information, but it's also about old releases and involved a
lot of additional changes (Folsom->Havana, integrating NSX, etc.),
whereas we're just interested in moving from nova-network to Neutron in
place on our Kilo clusters and carrying as little else along for the
ride as possible.
Therefore, I come to you all to ask for battle stories from anyone who's
gone up against migrating to Neutron and lived to tell the tale. Do your
users roundly curse you and speak angrily of the Great Networking
Betrayal, where you lost all their floating IPs and security groups, or
are you celebrated as the great warlord who slew the diabolical iptables
NAT monster and brought peace and stability (and LBaaS) to cloud
networks everywhere?
I heard NeCTAR used this script
(https://github.com/NeCTAR-RC/novanet2neutron ) with some success to do
a live nova-net to neutron, which might have been Juno or Kilo release.
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