BIND up and working. 3 zones in sync. Summary inside

[Barry Margolin]

In article <fdjg5m$2aq5$1 at sf1.isc.org>,
 "Ryan McCain" <Ryan.McCain at dss.state.la.us> wrote:

> Hopefully this will help others out in the future.
> 
> Summary: We have been using dss.state.la.us for ages and have now been told 
> to also start using dss.la.gov and dss.louisiana.gov.  Since any new DNS 
> record would go in all 3 zones I wanted to create a way where I didn't have 
> to manually update the 3 zone files.  With the help of many people on this 
> list, this is how I was able to accomplish that goal.
> 
> dss.state.la.us zone file:
> $TTL 3600       ; 1 hour
> @               IN SOA  dss-cs99la14.dss.state.la.us. 
> webmaster.dss.state.la.us. (
>                                 2007092802  ; serial
>                                 1200        ; refresh (20 minutes)
>                                 600         ; retry (10 minutes)
>                                 1209600     ; expire (2 weeks)
>                                 3600        ; minimum (1 hour)
> )
>                         NS      dss-cs99la14.dss.state.la.us.
>                         NS      dss-dr93la05.dss.state.la.us.
>                         MX      10 smtp1
> $INCLUDE /var/lib/named/shared.zone
> 
> ...Notice the $INCLUDE statement.  The shared.zone file contains the all of 
> our DNS records:
> 
> -SNIP-
> drac                    CNAME   dss-cs99ma22
> dss-ad-idm-test         A       10.120.160.188
> dss-adobe-suse          A       10.120.160.250
> dss-adobe-w2k3          A       10.120.160.249
> dss-as5300              CNAME   dss-sdis1722388
> dss-asfr1719680         A       172.21.6.154
> dss-br03nf03            A       10.122.32.239
> dss-br17nf01            A       10.122.11.239
> dss-br17nf02            A       10.122.13.239
> dss-br17nf05            A       10.120.100.216
> -SNIP-
> 
> I then linked the dss.la gov and dss.louisiana.gov  zone files to to the 
> dss.state.la.us zone file:
> # ln -s /var/lib/named/master/dss.state.la.us 
> /var/lib/named/master/dss.la.gov
> # ln -s /var/lib/named/master/dss.state.la.us 
> /var/lib/named/master/dss.louisiana.gov
> 
> ..This way, when I add a DNS record to the shared.zone file I only need to 
> update the serial number in one file since all 3 zones are linked to each 
> other.

If all the files are linked together, why do you need the $INCLUDE file?  
Just put everything in the dss.state.la.us file.

And why do you even need the links?  Just specify the same filename for 
all three zones in named.conf?

-- 
Barry Margolin, barmar at alum.mit.edu
Arlington, MA
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