CoreDNS-005 Release

CoreDNS-005 Release Notes.

CoreDNS-005 has been released!

CoreDNS is a DNS server that chains plugins, where each plugin implements a DNS feature.

What is New


A way to configure (external) plugin was added. Edit plugin.cfg and do a go generate && go build and your plugin has been added. This allows for out-of-tree plugin to be easily added. Documentation can be found in plugin.cfg.

Plugin improvements


  • erratic: a new plugin that can drop queries, limited in the current functionality, but useful for testing.
  • trace: a new plugin that implements OpenTracing-based tracing using Zipkin.


  • proxy: fix a bug when a connection hangs and never gets release (#467)
  • proxy: Fold httpproxy into it, which is now a normal proxy with a special protocol. For Monitoring an extra label was added: proxy_proto that shows the protocol used (dns or https_google). See the proxy for details.
  • httpproxy: removed because functionality is moved to proxy.
  • kubernetes: Now implements the full Kubernetes DNS Specification, including regular and headless services, endpoint hostnames, A, SRV, and PTR records.
  • kubernetes: Implements the pod type for requests in both a Kube-DNS compatible mode (insecure) and a mode which validates that the IP in question belongs to a pod in the specified namespace (verified)
  • kubernetes: Simplified the configuration of reverse zones. Instead of listing the zones in the zone list, you can just add a list of CIDRs using the cidrs option.
  • rewrite: allow rewriting more bits of the incoming packet. This required some backward incompatible changes, e.g. a new FIELD keyword is now required. See the rewrite for details.


The following people helped with getting this release done:

Bob Wasniak, Chris O’Haver, devnev, Dmytro Kislov, John Belamaric, Miek Gieben, Yong Tang.

If you want to help, please check out one of the issues and start coding!

For documentation and help, see our community page.

CoreDNS Authors
Published: and tagged Notes, Release and 005 using 307 words.