Bind log file rotation strategies?

[Pepe]

Hello.

I have configured Bind 9 to log to a file. But I want to rotate AND 
COMPRESS (gzip) the rotated files, for lets say a cycle of 30 days. I am 
aware of the "versions" option, which does the rotation part, but how do 
you people go about compressing the already rotated files, in an easy 
*automated* way which plays nice with BIND log creation?

I have resorted to a logrotate pre-script that does the preparation, but 
I guess better ideas may exist...

This is my current configuration:


---------------------
File /etc/bind/named.conf:

logging {
         channel mi_fichero {
                 file "/var/log/bind/bind.log" versions 1 size 10M;
                 severity info;
                 print-category yes;
                 print-severity yes;
                 print-time yes;
         };
         category client { mi_fichero; };
         category config { mi_fichero; };
         category database { mi_fichero; };
         category dnssec { mi_fichero; };
         category lame-servers { mi_fichero; };
         category network { mi_fichero; };
         category notify { mi_fichero; };
         category queries { mi_fichero; };
         category resolver { mi_fichero; };
         category security { mi_fichero; };
         category update { mi_fichero; };
         category xfer-in { mi_fichero; };
         category xfer-out { mi_fichero; };
         category general { mi_fichero; };
};


---------------------
File /etc/logrotate.d/bind:

/var/log/bind/bind.log.rotado {
         daily
         missingok
         nocreate
         rotate 30
         compress
         notifempty
         sharedscripts
         prerotate
                 /usr/local/sbin/bind9-pre-rotate.sh
         endscript
}


---------------------
File /usr/local/sbin/bind9-pre-rotate.sh:

#!/bin/bash
[ -f /var/log/bind/bind.log.0 ] \
&& mv /var/log/bind/bind.log.0 /var/log/bind/bind.log.rotado


It works, provided the daily BIND log does not grow bigger than 10 MB 
(If that happens, I guess I would loose the log because of "versions 1". 
However configuring "versions" higher that 1 would mean the script 
"bind9-pre-rotate.sh" would have to account also for an additional 
"/var/log/bind/bind.log.1" BIND log file... and probably configure 
another logrotate.d entry for it...)

So I am not really happy and would like to hear any suggestion or 
improvement.

Thank you very much.

Regards,

Pepe.