Add Custom CoreDNS Configuration
It may be desirable to enhance the configuration of CoreDNS by incorporating additional settings. To ensure the persistence of these changes during control plane maintenance, it is necessary to create a ConfigMap within the
kube-systemnamespace. The ConfigMap should be named
coredns-additional-confand should include a data entry with the key
extra.conf. The value associated with this entry must be a string that encompasses the supplementary configuration.
Below is an illustrative example that demonstrates the process of adding a custom DNS entry for