Symptoms
DNS records are not synchronized with the slave DNS servers. On the OBAS container:
[root@obas ~]# dig axfr example.com @localhost
....
....
;; global options: printcmd
;; connection timed out; no servers could be reached
So zone transfers are prohibited in the PowerDNS server. Restarting pdns service fixes the issue:
# /etc/init.d/pdns restart
Cause
OBAS is installed on the EOLed Virtuozzo 4.0.
Resolution
Upgrade Virtuozzo on the management node to the version 4.7
Workaround:
Create a periodic task on the OBAS node for restarting pdns service each hour with the following script (please set permissions to 755 for this script):
/etc/cron.hourly/pdns
--->8---
#!/bin/sh
/etc/init.d/pdns restart
---8<---