Configuration fields
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DNS zones is an array of strings, each of which represents a DNS zone to be transferred from the DNS server. All dns zones must have a trailing period (“.”) character.
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Hosts List is an array of hostname/ip and port pairs pointing to the DNS server(s) from which to fetch the DNS records. Multiple DNS servers may be configured here for HA purposes only. High Availability behavior across multiple DNS servers specified in the hosts_list is “first healthy server” and will favor the earlier entries in the hosts_list. Zones cannot be split across the DNS servers.