Delegation of part of a zone to a global server load balancer

[McDonald, Dan]

What’s the right way to delegate individual zone records to a “global server load balancer”, which is just a simple DNS server that checks to see if a server is up and if so adds the address to the rotation for resolution.

I’ve tried simple delegation using ns records, but I don’t get resolution.  In this example, nsg3 and 4 are my global server load balancers for the outlook.aelabad.net zone,  and ns3.aelabad.net is the start of authority for  the aelabad.net zone.



Daniel-McDonalds-iMac:~ mcdonalddj$ dig outlook.aelabad.net +norecurse @ns3.aelabad.net


; <<>> DiG 9.8.3-P1 <<>> outlook.aelabad.net +norecurse @ns3.aelabad.net

;; global options: +cmd

;; Got answer:

;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 25051

;; flags: qr ra; QUERY: 1, ANSWER: 0, AUTHORITY: 2, ADDITIONAL: 1


;; QUESTION SECTION:

;outlook.aelabad.net. IN A


;; AUTHORITY SECTION:

outlook.aelabad.net. 1200 IN NS nsg4.austin-energy.net.

outlook.aelabad.net. 1200 IN NS nsg3.austin-energy.net.


;; ADDITIONAL SECTION:

nsg3.austin-energy.net. 918 IN A 10.10.9.3


;; Query time: 1 msec

;; SERVER: 10.1.9.34#53(10.1.9.34)

;; WHEN: Mon Apr  7 09:05:42 2014

;; MSG SIZE  rcvd: 105

Daniel-McDonalds-iMac:~ mcdonalddj$ dig outlook.aelabad.net @nsg3.austin-energy.net


; <<>> DiG 9.8.3-P1 <<>> outlook.aelabad.net @nsg3.austin-energy.net

;; global options: +cmd

;; Got answer:

;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 8783

;; flags: qr aa ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0


;; QUESTION SECTION:

;outlook.aelabad.net. IN A


;; ANSWER SECTION:

outlook.aelabad.net. 10 IN A 10.10.223.52


;; Query time: 3 msec

;; SERVER: 10.10.9.3#53(10.10.9.3)

;; WHEN: Mon Apr  7 09:03:03 2014

;; MSG SIZE  rcvd: 72

Daniel-McDonalds-iMac:~ mcdonalddj$ dig outlook.aelabad.net @ns3.aelabad.net


; <<>> DiG 9.8.3-P1 <<>> outlook.aelabad.net @ns3.aelabad.net

;; global options: +cmd

;; Got answer:

;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 14770

;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0


;; QUESTION SECTION:

;outlook.aelabad.net. IN A


;; AUTHORITY SECTION:

net. 686 IN SOA a.gtld-servers.net. nstld.verisign-grs.com. 1396879162 1800 900 604800 86400


;; Query time: 2 msec

;; SERVER: 10.1.9.34#53(10.1.9.34)

;; WHEN: Mon Apr  7 09:03:17 2014

;; MSG SIZE  rcvd: 110



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