Inline, Salvatore On 12 October 2015 at 10:23, Germy Lure <germy.l...@gmail.com> wrote:
> Thank you, Kevin. > So the community just divided the whole openstack into separate > sub-projects(Nova,Neutron and etc.) but it's not taken into account that if > those modules can work together with different versions. Yes? > The developer community has been addressing this by ensuring, to some extent, backward compatibility between the APIs used for communicating across services. This is what allows a component at version X to operate with another component at version Y. In the case of Neutron and Nova, this is only done with REST over HTTP. Other projects also use RPC over AMQP. Neutron strived to be backward compatible since the v2 API was introduced in Folsom. Therefore you should be able to run Neutron Kilo with Nova Havana; as Kevin noted, you might want to disable notifications on the Neutron side as the nova extension that processes them does not exist in Havana. > > If so, is it possible to keep being compatible with each other in > technology? How about just N+1? And how about just in Neutron? > While it is surely possible, enforcing this, as far as I can tell, is not a requirement for Openstack projects. Indeed, it is not something which is tested in the gate. It would be interesting to have it as a part of a rolling upgrade test for an OpenStack cloud, where, for instance, you first upgrade the networking service and then the compute service. But beyond that I do not think the upstream developer community should provide any additional guarantee, notwithstanding guarantees on API backward compatibility. > Germy > . > > On Sun, Oct 11, 2015 at 4:33 PM, Kevin Benton <blak...@gmail.com> wrote: > >> For the particular Nova Neutron example, the Neutron Kilo API should >> still be compatible with the calls Havana Nova makes. I think you will need >> to disable the Nova callbacks on the Neutron side because the Havana >> version wasn't expecting them. >> >> I've tried out many N+1 combinations (e.g. Icehouse + Juno, Juno + Kilo) >> but I haven't tried a gap that big. >> >> Cheers, >> Kevin Benton >> >> On Sat, Oct 10, 2015 at 1:50 AM, Germy Lure <germy.l...@gmail.com> wrote: >> >>> Hi all, >>> >>> As you know, openstack projects are developed separately. And >>> theoretically, people can create networks with Neutron in Kilo version for >>> Nova in Havana version. >>> >>> Did Anyone tried it? >>> Do we have some pages to show what combination can work together? >>> >>> Thanks. >>> Germy >>> . >>> >>> >>> __________________________________________________________________________ >>> OpenStack Development Mailing List (not for usage questions) >>> Unsubscribe: >>> openstack-dev-requ...@lists.openstack.org?subject:unsubscribe >>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev >>> >>> >> >> >> -- >> Kevin Benton >> >> __________________________________________________________________________ >> OpenStack Development Mailing List (not for usage questions) >> Unsubscribe: >> openstack-dev-requ...@lists.openstack.org?subject:unsubscribe >> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev >> >> > > __________________________________________________________________________ > OpenStack Development Mailing List (not for usage questions) > Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev > >
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