A container image that provides CoreDNS compiled with the Unbound plugin. This provides a recursive DNS caching server. The image is based on Debian 11 Bullseye.

Default configuration:

$ docker run -p 53:53/tcp -p 53:53/udp -d --name coredns-unbound coredns-unbound:1.8.3-1

Custom Corefile configuration (an example is provided in this repository):

$ docker run -p 55:53/tcp -p 53:53/udp -v "$(pwd):/etc/coredns" -d --name coredns-unbound coredns-unbound:1.8.3-1

The container image is available on both Docker Hub and Quay.io.

$ docker pull ekultails/coredns-unbound

$ docker pull quay.io/ekultails/coredns-unbound

An automated build script is provided to download the source code, patch it to workaround a known bug with the Unbound plugin, create an image with the build dependencies, and then compile the coredns binary.

$ ./build.sh

Example container tag: 1.8.3-1

• 1.8.3 = The CoreDNS version.
• -1 = The release of container-coredns-unbound. If the container has changed but the CoreDNS version has not then this release number is increased by one. This is reset to 1 when the CoreDNS version is increased.

Apache Software License v2.0.