Re: Extending UPDATE to add/remove zones

Mukund Sivaraman <[email protected]>
Newsgroups gmane.ietf.dnsext
Message-ID <[email protected]>
On Thu, Oct 17, 2013 at 11:34:06PM +1300, Jay Daley wrote:
> 
> On 17/10/2013, at 5:58 PM, Mukund Sivaraman <[email protected]> wrote:
> 
> > On Wed, Oct 16, 2013 at 10:33:03PM +1300, Jay Daley wrote:
> >> 5.  If there is data in the Additional section then that signifies
> >> that the zones to be added are slaves.  The records here must be NS
> >> records that specify the masters for the zones to be added.  There can
> >> only be records here or in the Update section but not both as zones
> >> cannot be both masters and slaves.
> > 
> > Would glue be allowed here?
> 
> I see what you are getting at and I think that rather than NS + glue
> the records that must be here are either A or AAAA records that are
> the addresses of the servers to contact to pull the zone from.

One more thing:

RFC 1035 calls for durable storage of zone data. This is not a strict
requirement for configured secondaries if you consider that a secondary
can AXFR data from scratch during startup and store it in volatile
memory. There are no updates to zone data made at secondaries -
transfers not being considered as updates to data.

So far, the "catalog" (RFC 1035) is a part of the secondary
implementation's static configuration. The secondary can run without
writing to durable storage.

The case where a secondary crashes, loses its dynamic configuration
should be addressed. Is an admin expected to reconfigure the secondary
on startup each time? Is the secondary expected to save the updated
catalog to durable storage? (The latter may not be agreeable to
everyone, so support for both should be considered.)

		Mukund

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