[Openstack] transfer of IP address between ports

Misha Dobrovolskyy snake at snake.org.ua
Mon Aug 28 09:00:52 UTC 2017

Good morning,

Maybe external network without dhcp will do a work? It requires additional
interface, like rackspace did initially in their cloud, but customer can
maintain vrrp then in l2 network.


пн, 28 серп. 2017 о 11:24 Volodymyr Litovka <doka.ua at gmx.com> пише:

> Hi Andrew,
> sorry for delay in responding, there were Ukrainian Independence Day and
> we were on holidays, spending time with family and friends :)
> On 8/24/17 6:36 PM, 공용준 wrote:
> There is another scenario. It's going to be public cloud and there can be
> few reasons to allow customer to move pubic IP address between his VMs,
> e.g. he built another VM using another OS for same role and need to move
> this role from old VM to new VM, do not changing other infrastructure's
> configurations. Five or ten seconds of cool down time isn't a problem
> itself, since it's not for high availability
> Did you consider the lbaas for this purpose? I think floating IP’s concept
> is good, but the implementation I think we need to rethink about this.
> and I thinks opentack’s octavia also do the job.
> Yes, I'm considering LBaaS, but as another service in my public cloud :)
> So, don't want to provide it as part of base set of services.
> I will check what you did in order to solve this issue, but preliminary I
> think that you're right and floating IP is the best solution for this
> (since don't require Openstack modification). The only concern I have
> regarding floating IP is performance since NAT is involved and this can
> lead to performance degradation. I think I will provide two kinds of IP
> addresses - fixed and transferable. And if somebody needs to preserve IP
> address between two different instance, he will choose transferable IP for
> additional cost - this will prevent massive NAT, on the one hand and will
> compensate additional resources exhaustion, on the other.
> Thank you!
> --
> Volodymyr Litovka
>   "Vision without Execution is Hallucination." -- Thomas Edison
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