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dns cluster out of sync / zones missing

Discussion in 'Bind/DNS/Nameserver' started by mike25, Jan 9, 2007.

  1. mike25

    mike25 Well-Known Member

    Aug 29, 2003
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    Raleigh NC, USA
    I have been moving domains to a new server for a few days. I have setup clustering and everything seemed well. I moved the old IP addresses for the name servers over to the new server only to discover that the DNS records for domains located elsewhere in the cluster where now not resolving correctly from the new server. All account that had been moved were resolving fine. I had synced all records correctly. the entires for the domains were in the /etc/named.conf and the zone records were present in the /var/named/ directory. terminating and then recreating the dns zone on the new server would correct the problem, but that was to time consuming for thousands of zones. after a close inspection it seemed that the zone files were missing from the /var/named/chroot/var/named/ directory. copying all of the missing zones to from /var/named to /var/named/chroot/var/named corrected the issue, there were about 2000 zones missing. Does any one know what would cause this to happen? Why are there two seperate locations for db files to begin with? shouldnt this all be in one central location?
  2. freedman

    freedman Well-Known Member

    Feb 13, 2005
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    most likely the serial numbers for the new entries aren't newer than the old ones.. you may have to update them manually
    the .db files in /var/named should start with something like this:

    ; cPanel 10
    ; Zone file for
    $TTL 14400
    @ 86400 IN SOA (
    2007012900 ; serial, todays date+todays
    86400 ; refresh, seconds
    7200 ; retry, seconds
    3600000 ; expire, seconds
    86400 ) ; minimum, seconds

    the serial number is the critical piece.. go with the convention YYYMMDDxx and increment xx.. that way when it's edited in cpanel later, when they update the date, it'll all work fine.

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