I don't have much content on CoreDNS. But from the description in the README, https://github.com/coredns/coredns/blob/master/README.md https://github.com/coredn

I don't have much content on CoreDNS. But from the description in the README, https://github.com/coredns/coredns/blob/master/README.md https://github.com/coredns/coredns/blob/master/README.md, I guess it acts as a flexible and programmable entry service for underlying services and can do many applications such as Load Balance, depending on plugins.