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Last pushed: a month ago
Short Description
The Knot DNS recursive name server by CZ.NIC
Full Description

Knot DNS Resolver




Knot DNS Resolver is a caching full resolver implementation written in C and LuaJIT, both a resolver library and a daemon. The core architecture is tiny and efficient, and provides a foundation and
a state-machine like API for extensions. There are four of those built-in - iterator, validator and two caching modules. Most of the rich features are written in Lua(JIT) and C. Batteries are included, but optional.

The LuaJIT modules, support DNS privacy and DNSSEC, and persistent cache with low memory footprint make it a great personal DNS resolver or a research tool to tap into DNS data. TL;DR it's the OpenResty of DNS.

Several cache backends (LMDB, Redis and Memcached), strong filtering rules, and auto-configuration with etcd make it a great large-scale resolver solution.

The server adopts a different scaling strategy than the rest of the DNS recursors - no threading, shared-nothing architecture (except MVCC cache that may be shared) that allows you to pin instances on available CPU cores and grow by self-replication. You can start and stop additional nodes depending on the contention without downtime.

It also has strong support for DNS over TCP, notably TCP Fast-Open, query pipelining and deduplication, and response reordering.

Packages

Knot Resolver is packaged for
Debian,
Fedora,
Ubuntu,
Homebrew and
NixOS/Nixpkgs.
You can also find it as the default DNS resolver in our open-source router Turris Omnia.
See the Knot-resolver homepage for more information.

<!-- [openSUSE](https://build.opensuse.org/package/show/server:dns/knot-resolver), (it seems to be in a bad shape) -->

Building from sources

Knot DNS Resolver mainly depends on Knot DNS libraries, LuaJIT and libuv.
See the Building project documentation page for more information.

Docker image

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

$ docker run -it cznic/knot-resolver

See the build page hub.docker.com/r/cznic/knot-resolver for more information and options.

Running

The project builds a resolver library in the lib directory, and a daemon in the daemon directory. It requires no configuration or parameters to run a server on localhost.

$ kresd

See the documentation at knot-resolver.readthedocs.io for more options.

Contacting us

Docker Pull Command
Owner
cznic
Source Repository

Comments (3)
kometchtech
5 months ago

Docker build error?

make[1]: Leaving directory '/tmp/build/.build-depend/libknot-v2.4.2'

  • build_pkg --with-library-only
  • '[' -f configure.ac ']'
  • '[' -f CMakeLists.txt ']'
  • make --with-library-only
    make: unrecognized option '--with-library-only'
    Usage: make [options] [target] ...
vavrusa
2 years ago

Fixed, thanks!

tomkukral
2 years ago

Entrypoint CMD should be ["/usr/local/bin/kresolved"], IMHO.
Thanks for publishing resolver image!