[H-SASIG] Move of Excalibur

[Russell Stuart]

On Fri, 2010-01-01 at 16:16 +1000, James Iseppi wrote:
> This is because my server was still  
> using the old excalibur's IP address as the master, and the zone on  
> the old server had not been changed to reflect the changes, therefore  
> creating two different views of the humbug.org.au domain in the DNS.  

Bugger.  I hadn't removed cartman.pipegrep.com.au from the registrar.  I
had removed it from the zone file, but forgot to do the second bit.  Now
it has been updated I have added it back in.

> This means that there is minimal chance of having different records  
> being provided by the various name servers (including the old and new  
> masters). It also means that if you can't re-configure one of the  
> slaves immediately the changes will still make it to that slave  
> through the old master.

Yes, well I was close to that.  I wanted to change the old excalibur as
little as possible, so rather than making it a slave I just ensured
excalibur.humbug.org.au (what the NS record points to) had the new
servers IP.  In retrospect making a slave would have been just as easy,
so I have done that now.

> Also the old excalibur is not receiving any zone updates from the new  
> excalibur which could cause issues if glue records aren't up to date  
> in a cache somewhere, and you can't control the TTL [5] of glue  
> records at the registry, so there is little you can do to prevent  
> this.

Yes.  The glue record for NS excalibur.humbug.org.au is indeed the
problem I was referring to originally.  Are you sure TTL's apply to
glue?  After you fixed cartman, all servers were reporting the new
servers IP for excalibur.humbug.org.au.  Decidedly more than 4 hours
have passed since then, but the glue records stubbornly continue to
point to the old server.  I have tried removing and adding excalibur at
the registrar.  Still no go.  I have always had to make a phone call to
the registrar to fix problem in the past.