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Hi Andrew,

Yes - That makes sense. Thanks!

So, Another question. On EC2, Querying for the external DNS name of an
instance will return its internal IP, if the query originates from the
same availability zone (or maybe region, I can't remember offhand). Is
this planned?

This would (in a roundabout way) resolve the issue of being unable to
access the local instance via its floating IP..

Thanks,
Kiall


On Fri, Jan 6, 2012 at 7:47 PM, Andrew Bogott <abogott at wikimedia.org> wrote:

>  Kiall --
>
> There's a bit of terminology confusion in that blueprint, which I'm trying
> to resolve.  For starters, 'dns zone' and 'availability zone' were both
> getting called 'zones' which I've tried to resolve by replacing 'dns zone'
> with 'dns domain' wherever possible.
>
> The other confusion is that the blueprint says 'public/private' where it
> should probably say 'floating/instance'.  The current design assumes that
> instance DNS entries (which are automatically created and deleted as
> instances are added and removed) will always be placed in private DNS
> domains.  Specifically, all the instances in a given availability zone will
> be assigned DNS entries in the private domain that is associated with that
> zone.
>
> So, for example, in availability zone1, you would:
>
> a) Create a DNS domain called 'somedomain.internal' and assign it to zone1
> b) Set FLAGS.instance_dns_domain for zone1 to 'somedomain.internal'
> c) After which, a new instance in zone1 would be automatically assigned a
> DNS name e.g. 'instance1.somedomain.internal'.
>
> It would be possible to eliminate step a) and have step c) implicitly
> create 'somedomain.internal' if it doesn't already exist.  I'm not yet
> clear on whether that's better or worse.  Either way it's important that
> 'somedomain.internal' be specifically assigned to zone1 so that other
> unrelated activities don't drop entries into that domain.
>
> Does that clarify?
>
> -Andrew
>
>
> On 1/6/12 12:24 AM, Kiall Mac Innes wrote:
>
> Hi Andrew,
>
>  One question, can you clarify/expand on the following sentence from the
> blueprint?
>
>  Users can create new domains or delete existing ones. When a private
>> domain is created it can be assigned to an availability zone.
>
>
>  Specifically, the assignment of a domain to an availability zone.
>
> Thanks,
> Kiall
>
>
> On Fri, Jan 6, 2012 at 8:21 AM, Kiall Mac Innes <kiall at managedit.ie>wrote:
>
>>  On Thu, Jan 5, 2012 at 10:05 PM, Andrew Bogott <andrewbogott at gmail.com>wrote:
>>
>>> I doubt that anyone but me is keeping much of an eye on this extension,
>>> but it nonetheless feels rude for me to unilaterally modify it when it is
>>> already a part of a release schedule.
>>
>>
>>   I've been keeping an eye on it... and the additions are welcome in my
>> view..
>>
>>  Kiall
>>
>
>
>
>
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