cname

The cname plugin eliminates CNAME records.

Syntax

cname

This will transform responses like this:

;; ANSWER SECTION:
example.com.		3600	IN	CNAME	two.example.org.
two.example.org.	3600	IN	CNAME	one.example.net.
one.example.net.	3600	IN	A	127.0.0.1

into

;; ANSWER SECTION:
example.com.		3600	IN	A	127.0.0.1

Installation

As per CoreDNS docs, there are two ways.

Build with compile-time configuration file

$ git clone https://github.com/coredns/coredns
$ cd coredns
$ vim plugin.cfg
# Add the line cname:github.com/iandri/cname before the file middleware
$ go generate
$ go build
$ ./coredns -plugins | grep cname

Build with external golang source code

$ git clone https://github.com/iandri/cname
$ cd cname/coredns
$ go build
$ ./coredns -plugins | grep cname