[Openstack] Neutron vs. FlatDHCP -- what's the latest?
abogott at wikimedia.org
Mon Dec 22 08:46:48 UTC 2014
On 12/22/14 2:08 PM, Kevin Benton wrote:
> Can't you simulate the same topology as the FlatDHCPManager + Floating
> IPs with a shared network attached to a router which is then attached
> to an external network?
Mmmmaybe? Floating IP support in nova-network is pretty great
(allocation, assignment, release, etc.) and allows us shuffle around a
small number of public IPs amongst a much larger number of instances.
Your suggestion doesn't address that, does it? Short of my implementing
a bunch of custom stuff on my own?
> On Sun, Dec 21, 2014 at 7:00 PM, Andrew Bogott <abogott at wikimedia.org
> <mailto:abogott at wikimedia.org>> wrote:
> I'm about to set up a new cloud, so for the second time this year
> I'm facing the question of Neutron vs. nova-network. In our
> current setup we're using nova.network.manager.FlatDHCPManager
> with floating IPs. This config has been working fine, and would
> probably be our first choice for the new cloud as well.
> At this point is there any compelling reason for us to switch to
> Neutron? My understanding is that the Neutron flat network model
> still doesn't support anything similar to floating IPs, so if we
> move to Neutron we'll need to switch to a subnet-per-tenant
> model. Is that still correct?
> I'm puzzled by the statement that " upgrades without instance
> downtime will be available in the Kilo release" -- surely for
> such a path to exist, Kilo/Neutron would need to support all the
> same use cases as nova-network. If that's right and Neutron is
> right on the verge of supporting flat-with-floating then we may
> just cool our jets and wait to build the new cloud until Kilo is
> released. I have no particular reason to prefer Neutron, but I'd
> like to avoid betting on a horse right before it's put down :)
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> Kevin Benton
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