[Openstack] Floating IP in OpenStack API

Mark Washenberger mark.washenberger at rackspace.com
Sun Apr 17 14:24:20 UTC 2011


Eldar,
 
I'm having some trouble finding the diff for your implementation of approach #1. Any chance you can share it on the list?
 
Thanks
 
"Erik Carlin" <erik.carlin at rackspace.com> said:

> Cool.  Got it.  Floating IPs or what Amazon calls Elastic IPs.  How are you
> solving the cross L2 problem?
> 
> Erik
> 
> Sent from my iPhone
> 
> On Apr 15, 2011, at 7:28 PM, "Eldar Nugaev" <enugaev at griddynamics.com>
> wrote:
> 
> > Hi Erik
> >
> > Thank you for response!
> > Yes, you are absolutely right OpenStack API already support shared IP
> groups.
> > Suppose there are some misunderstanding, because I wrote about floating IPs.
> >
> > I want to have API for association IPs from floating IPs pool with
> > particular VM.
> >
> > At this moment we have #1 implementation as a path in our RPM repo
> > http://yum.griddynamics.net/. And going to make the merge proposal to
> > trunk.
> >
> > Also we going to create blueprint about #3 and attach branch to it.
> >
> > Eldar
> >
> > On Sat, Apr 16, 2011 at 2:34 AM, Erik Carlin
> <erik.carlin at rackspace.com> wrote:
> >> Eldar -
> >>
> >> The OpenStack API already supports sharing IPs between instances
> (although
> >> this may be an extension?).  What exact behavior are you after?  More
> >> important than the way in which we expose via the API is how it's
> >> implemented.  It's important to note that this is extremely network
> >> topology dependent.  Sharing IPs today requires L2 adjacency so other
> VMs
> >> can GARP for the IP.  L2 doesn't work at scale so you need another
> >> mechanism.  I'm pretty sure the way AWS does it is to have a separate
> pool
> >> of IPs and inject /32 routes higher up that route towards the
> appropriate
> >> VM IP.  What are your thoughts around how this would be implemented?
> >>
> >> Multiple people are working towards an independent Network as a Service
> >> external to nova so it may make sense to plug this requirement in there.
> >>
> >> Erik
> >>
> >> On 4/11/11 8:31 AM, "Eldar Nugaev" <enugaev at griddynamics.com>
> wrote:
> >>
> >>> Hello everyone,
> >>>
> >>> We going to add possibility to assigning floating IP addresses in
> >>> OpenStack API.
> >>> Our goal reproduce AWS behavior when creating instance automatically
> >>> assigns any free floating IP or add methods to OpenStack API for
> >>> allocation and association API addresses.
> >>>
> >>> At this time we see three way:
> >>>
> >>> 1. FLAG --auto_assign_floating_ip (default=False)
> >>> 2. Optional parameter "auto_assign_floating_ip" in existing "create"
> >>> method
> >>> 3. OpenStack API add floating_ip - allocate_floating_ip,
> >>> associate_floating_ip
> >>>
> >>> What way is more suitable at this time?
> >>>
> >>> --
> >>> Eldar
> >>> Skype: eldar.nugaev
> >>>
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> >>
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> >>
> >
> >
> >
> > --
> > Eldar
> > Skype: eldar.nugaev
> 
> 
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