Knot DNS Resolver

The Knot DNS Resolver is a minimalistic caching resolver implementation. The project provides both a resolver library and a small daemon. Modular architecture of the library keeps the core tiny and efficient, and provides a state-machine like API for extensions. There are three built-in modules: iterator, cache and stats, but each module can be flipped on and off.

Try it out?

The Knot DNS Resolver is currently in an early development phase, you shouldn't put it in the production right away.

Docker image

This is simple and doesn't require any dependencies or system modifications, just run:

$ docker run cznic/knot-resolver

See the build page https://registry.hub.docker.com/u/cznic/knot-resolver for more information and options. You can hack on the container by changing the container entrypoint to shell like:

$ docker run -it --entrypoint=/bin/bash cznic/knot-resolver

Building from sources

The Knot DNS Resolver depends on the development version of the Knot DNS library, and a reasonably recent version of libuv. Several dependencies may not be in the packages yet, the script pulls and installs all dependencies in a chroot.

$ FAKEROOT="/tmp/resolver-depends"
$ ./scripts/build-depends.sh ${FAKEROOT} 
$ export LDFLAGS="-L${FAKEROOT}/lib"
$ export PKG_CONFIG_PATH="${FAKEROOT}/lib/pkgconfig"
$ ./configure --enable-integration-tests
$ autoreconf -if
$ make
$ make check

Running

There is a separate resolver library in the lib directory, and a minimalistic daemon in the daemon directory. The daemon accepts a few CLI parameters, and there's no support for configuration right now.

$ ./daemon/kresolved -h
$ ./daemon/kresolved -a 127.0.0.1#53