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Accepted
Chris
Asked: 2009-07-23 10:31:22 +0800 CST

Quick way to duplicate zones in BIND

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We have a standard high-availability setup at a co-location facility that we host client programs on. For some programs, we host the DNS, but I find that setting up multiple zones manually can be tedious and prone to error. Is there an easy way to setup a standard zone file template and some how run sed, awk, or some other program to process a set of variables from another file and merge them with the template to create a zone file?

I thought about using m4, but I'm not well versed and it only seems ideal for merging one template at a time.

Ideally, I'd like to take a standard zone file template and merge it with a list like so:

domain1=ip1
domain2=ip2
domain3=ip1
domain4=ip1
etc...

Is there a way to script this?

linux scripting domain-name-system bind

1 Answers

  1. Best Answer

    I think m4 would be overkill. My first instinct would be bash + sed, but if you have any familiarity with a higher-level language that might be easier. Off the top of my head, I would imagine something like this:

    Data file:

    example.com:192.168.10.1
fake.com:192.168.10.2
foo.com:192.168.10.3
bar.com:192.168.10.4

    Script:

    #!/bin/bash

DATAFILE=datafile
TEMPLATE=template.txt

for data in $(cat $DATAFILE)
do
    dom=${data%:*}
    ip=${data#*:}
    sed "{ s/DOMAIN/$dom/;
           s/IPADDR/$ip/;
         }" $TEMPLATE > $dom.zone
done

    And your template zone file would have "DOMAIN" or "IPADDR" where appropriate.

    This is completely untested and should be refined before use.

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