----- Original Message ----- > Dear All, > > I was just thinking whether it is possible to have a some type of > health checking of servers through BIND DNS Server and DNS Server > should replied to clients based on that only. > > > > i.e., Suppose I have two entries of www record for domain xyz.in > having ip address 10.1.1.10 and 10.2.2.10. > > Now I want that my DNS Server should check whether the server is up > or not before replying to clients. > > If one is down, then DNS server should reply the IP address of the > second one. > > > > Although this is not a DNS Job and we should use Load-Balancer for > this. > > But I just wanna to check whether this feature is available in Bind > or in any Open-Source Program which in turn can be combined with > BIND to achieve the desired result. >
Well, doesn't DNS kind of already do this...if the first DNS server isn' up, then the user's resolver will timeout and try the next resolver.... OTOH, for Load-Balancer.... we use a BigIP LTM, where I have a pool with two DNS servers and use the DNS_Monitor script F5 (which basically does a 'dig @<node> <lookup-name> | grep <expected-response> >/dev/null' ) Works pretty well, one of the nodes is usually the first one I do when there's a bind update. Additionally I hit all my DNS servers from nagios with the check_dns plugin. _______________________________________________ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
