How to remove extra zonefiles from web server that aren't hosted locally?

[electric]

Hello,

When we were setting up our DNS Cluster, a mistake was made and all servers were syncing to each other for a while.

As a result, every web server now has a local copy of every zonefile for every domain on every server. (Several thousands zonefiles on each web server, even though each web server only hosts a few hundred domains...)

How can we remove all the "extra" zonefiles from each web server?

The only servers that need a copy of all zonefiles are the cpanel dns-only nameservers. The individual web servers should only have the zonefiles for domains that are hosted on that server.

Thanks.

 

[NixTree]

Re: How to remove extra zonefiles from web server that aren't hosted locall

Hello,

When we were setting up our DNS Cluster, a mistake was made and all servers were syncing to each other for a while.

As a result, every web server now has a local copy of every zonefile for every domain on every server. (Several thousands zonefiles on each web server, even though each web server only hosts a few hundred domains...)

How can we remove all the "extra" zonefiles from each web server?

The only servers that need a copy of all zonefiles are the cpanel dns-only nameservers. The individual web servers should only have the zonefiles for domains that are hosted on that server.

Thanks.

I think you have to do it manually ( checking locally hosted domains and remove the rest; a simple script can do it)...but make sure that you remove the "server" from cluster before removing DNS zone files!

 

[electric]

Re: How to remove extra zonefiles from web server that aren't hosted locall

Anyone from cpanel want to comment on this?

How can we "clean up" our web servers so that the zonefiles of domains hosted on different servers are removed?

 

[electric]

Re: How to remove extra zonefiles from web server that aren't hosted locall

*bump*

Should I submit this as a support ticket?

 

[electric]

Re: How to remove extra zonefiles from web server that aren't hosted locall

Can someone from cpanel please review this script and let me know if it will do the job? I am trying to remove all zonefiles from the server that are not locally hosted.

Thanks.

#!/bin/bash
IFS="$"

# -----------------------------------------------------------
#
# 
# local_hosted_dns_cleanup.sh
#
# This script will remove all zonefiles not hosted 
# locally on the server.
#
# -----------------------------------------------------------

DATE=$(date +"%Y%m%d%H%M")
BACKUP_FOLDER=/var/named_backup_of_all_zones_${DATE}
TMP_LOCALZONES_FOLDER=/var/named_localzones_tmp_${DATE};


echo "Backing up all current zonefiles to ${BACKUP_FOLDER}";
mkdir ${BACKUP_FOLDER};
cp /var/named/*.db ${BACKUP_FOLDER}/;

echo "Making temp folder to hold locally hosted zonefiles";
mkdir ${TMP_LOCALZONES_FOLDER};

echo "Moving 'localdomains' zonefiles to temp folder";

### Copy localdomains (zonefiles with local hosted MX records).
cat /etc/localdomains | while read CPDOMAIN; do 
   if [ -f /var/named/${CPDOMAIN}.db ]; then
      mv /var/named/${CPDOMAIN}.db ${TMP_LOCALZONES_FOLDER}/${CPDOMAIN}.db
   fi
done

echo "Copying 'removedomains' zonefiles to temp folder";

### Copy remotedomains (zonefiles with remote hosted MX records).
cat /etc/remotedomains | while read CPDOMAIN; do 
   if [ -f /var/named/${CPDOMAIN}.db ]; then
      mv /var/named/${CPDOMAIN}.db ${TMP_LOCALZONES_FOLDER}/${CPDOMAIN}.db
   fi
done

echo "Deleting all remaining zonefiles";
rm -f /var/named/*.db;

echo "Moving zonefiles from temp folder to /var/named";
mv ${TMP_LOCALZONES_FOLDER}/* /var/named/;

echo "Restarting BIND";
/usr/local/cpanel/scripts/restartsrv named

echo "Removing temp folder";
rmdir ${TMP_LOCALZONES_FOLDER};

echo "Done. This server now has only locally hosted zonefiles."
exit;

 

[electric]

Re: How to remove extra zonefiles from web server that aren't hosted locall

I cleaned up the script a little and removed unnecessary stuff. Here is the latest:

#!/bin/bash
IFS="$";

# -----------------------------------------------------------
#
# 
# only_locally_hosted_zonefiles_cleanup.sh
#
# This script will remove all zonefiles not hosted 
# locally on the server.
#
# -----------------------------------------------------------

DATE=$(date +"%Y%m%d%H%M")
BACKUP_FOLDER=/var/named_backup_of_all_zonefiles_${DATE}

echo "Backing up all zonefiles to ${BACKUP_FOLDER}";
mkdir ${BACKUP_FOLDER};
cp -p /var/named/*.db ${BACKUP_FOLDER}/;

echo "Removing all zonefiles from /var/named";
rm -f /var/named/*.db;

echo "Copying back zonefiles listed in 'localdomains' file";
cat /etc/localdomains | while read CPDOMAIN; do 
   if [ -f ${BACKUP_FOLDER}/${CPDOMAIN}.db ]; then
      cp -p ${BACKUP_FOLDER}/${CPDOMAIN}.db /var/named/;
   fi
done

echo "Moving back zonefiles listed in 'remotedomains' file";
cat /etc/remotedomains | while read CPDOMAIN; do 
   if [ -f ${BACKUP_FOLDER}/${CPDOMAIN}.db ]; then
      cp -p ${BACKUP_FOLDER}/${CPDOMAIN}.db /var/named/;
   fi
done

echo "Done. This server now has only locally hosted zonefiles.";

echo "Attempting to restart BIND";
/usr/local/cpanel/scripts/restartsrv named;

exit;