dynamic zone file "style"
rob0 at gmx.co.uk
Wed Jul 8 20:07:40 UTC 2015
On Wed, Jul 08, 2015 at 05:38:59PM +0200,
Stefan.Lasche at t-systems.com wrote:
> Mark Andrews:
> >> By default, the bind daemon uses the "relative" style (or
> >> something similar) when writing dynamic zone files to disk.
> >> Guess what... all those "$ORIGIN" lines make it more difficult
> >> to parse the f ile by a separate script... ;)
> > Truly, you don't wan't to be reading master files. If you need
> > the content of the zone transfer it from the server. Doing that
> > you will always get the latest content and don't have to worry
> > about merging the journal etc.
> I understand your point. But for the script, I'll need the content
> of all my zones in all views. Zone transfers won't be very
> efficient for that.
I am not sure how you figure this. I think a
$ dig @127.0.0.1 example.com axfr
will be far MORE efficient than a
$ cat /path/to/zonefile/for/example.com
In the former you are writing/reading an UDP socket on localhost,
receiving data which is in named's memory. In the latter you are
opening and reading from a file on disk, which, as noted by Mark,
might not contain all the data you need.
> Until now I have experimented with the "-j" option from
> named-compilezone to take care of the journals. Though, I'm not
> sure this is much more efficient.
> Another option I evaluated was "rndc sync", but it isn't available
> on bind 9.8
I suppose you know this already, but 9.8 is in EOL status.
> But your reply made me think of yet another solution. "rndc dumpdb
> -zones" gives me the latest content of all zones of all views in a
> single file. And, luckily, it uses the "full" style :) So this
> should be fine for me.
> But before I try to re-invent the wheel:
> Does anyone know if there is already a parser for multiple
> zone_files/zone_dumps/zone_transfers? I'm trying to filter all DNS
> records that are related to a given host/ip?
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