For help!
Requirements are as follows: need to Linux system into a DNS server, first parsing aa under the domain of all IP addresses, and to extract all the IP address mapping to the custom of bb domain, and the operating time or the implementation of real-time (due to aa domain IP is polling)
For example, a certain period of time, the IP address of the aa domain is 1.1.1.1 and 2.2.2.2, we will need these two DNS IP extracted and mapped to your bb domain, that is to say, when I go to ping aa domain access to only one of the two IP, but go to ping bb domain names, we can ping to is next the two domain names, may need to use the bind and shell script, way, as long as you can achieve, but nginx is unable to realize,