Tracking all RRsets for a given host

[David Carmean]

I am developing an internal tool to apply my group's "business rules" 
to DNS zone management, via DDNS to BIND-9.  What I'm trying to 
figure out currently is whether I can use standard Resource Records 
to tie together all information for a given host, so that for example, 
if we get rid of a host all traces are removed from DNS.

For example, say I've got a multi-homed host with interfaces on 
three different networks.  What would /seem/ to be the thing to 
do, disregarding broken clients, is to pick a "canonical" hostname 
and list multiple A RRs with that domain name.  Then each IP 
address gets two (or more) PTR records, one with the hostname of 
that individual interface, and another with the "canonical" hostname.

e.g:

    $ORIGIN example.com.

    somehost-le0	IN	A	192.168.1.1
    somehost-qfe0	IN	A	192.168.2.2
    somehost-qfe1	IN	A	192.168.3.3
    somehost		IN	A	192.168.1.1
			IN	A	192.168.2.2
			IN	A	192.168.3.3

    $ORGIN 1.168.192.in-addr.arpa.
    
    1			IN	PTR	somehost-le0.example.com.
			IN	PTR	somehost.example.com.
    
    $ORGIN 2.168.192.in-addr.arpa.
    
    2			IN	PTR	somehost-qfe0.example.com.
			IN	PTR	somehost.example.com.


However...even if I manage to create good sortlist option statements for 
all 240 of my networks, or just turn off round-robin, DejaGoogle searches 
seem to indicate that the existence of multiple PTR records will be a 
nightmare.  And I guess multiple CNAME records are out of the 
question....

So can anyone think of a way to do this without doing something ugly like 
parsing formatted TXT records?  

Thanks....

(I suppose the real answer is to use another database as the "canonical" 
database, which contains this kind of glue, and populate DNS from it, but 
I don't have time to do something like that.)

-- 



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