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Let me talk a bit about this...   :-)


On 7 July 2014 14:43, Andrew Mann <andrew at divvycloud.com> wrote:

> What's the use case for an IPv6 endpoint? This service is just for
> instance metadata, so as long as a requirement to support IPv4 is in place,
> using solely an IPv4 endpoint avoids a number of complexities:
> - Which one to try first?
>
- Which one is authoritative?
>

Only 1, IPv6 metadata network via link-local (fe80::)...


> - Are both required to be present? I.e. can an instance really not have
> any IPv4 support and expect to work?
>

No.

Yes, I have tons of IPv6-Only machines, to reach IPv4, I'm using the couple
DNS64 + NAT64. I see no use for IPv4 anymore... IPv4 can be deployed only
at the border (i.e. as a legacy Floating IPv4 using NAT46)...

- I'd presume the IPv6 endpoint would have to be link-local scope? Would
> that mean that each subnet would need a compute metadata endpoint?
>

Good question... Apparently, IPv6 Link-Local fe80:: is the equivalent of
169.254 in IPv4 world...

Just my two bitcents...   ;-)


>
>
> On Mon, Jul 7, 2014 at 12:28 PM, Vishvananda Ishaya <vishvananda at gmail.com
> > wrote:
>
>> I haven’t heard of anyone addressing this, but it seems useful.
>>
>> Vish
>>
>> On Jul 7, 2014, at 9:15 AM, Nir Yechiel <nyechiel at redhat.com> wrote:
>>
>> > AFAIK, the cloud-init metadata service can currently be accessed only
>> by sending a request to http://169.254.169.254, and no IPv6 equivalent
>> is currently implemented. Does anyone working on this or tried to address
>> this before?
>> >
>> > Thanks,
>> > Nir
>> >
>> > _______________________________________________
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>> > OpenStack-dev at lists.openstack.org
>> > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
>>
>>
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>>
>
>
> --
> Andrew Mann
> DivvyCloud Inc.
> www.divvycloud.com
>
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