osbase/net/dns/kubernetes: add Kubernetes DNS handler

This adds a DNS server handler for Kubernetes DNS service discovery. It
is partially based on the CoreDNS Kubernetes plugin. The query handler
however is written completely from scratch. The handler in the CoreDNS
plugin is very weird; it first handles each query type separately, and
generates msg.Service objects which then need to be converted to dns
records. The new implementation is much simpler, and also more correct:
It handles ANY queries, and follows the rules for NXDOMAIN (If a name is
NXDOMAIN for one qtype, it is NXDOMAIN for all qtypes, and subdomains of
the name are also NXDOMAIN.)

Change-Id: Id1d498ca5384a3b047587ed73e95e4871d82d499
Reviewed-on: https://review.monogon.dev/c/monogon/+/3259
Reviewed-by: Lorenz Brun <lorenz@monogon.tech>
Tested-by: Jenkins CI
16 files changed
tree: 980731df4a124623e3785b05be5d61d00e063462
  1. .github/
  2. build/
  3. cloud/
  4. go/
  5. intellij/
  6. metropolis/
  7. net/
  8. osbase/
  9. third_party/
  10. tools/
  11. version/
  12. .bazelignore
  13. .bazelproject
  14. .bazelrc
  15. .bazelrc.ci
  16. .bazelrc.sandboxroot
  17. .bazelversion
  18. .git-ignore-revs
  19. .gitignore
  20. BUILD.bazel
  21. CODING_STANDARDS.md
  22. go.mod
  23. go.MODULE.bazel
  24. go.sum
  25. LICENSE
  26. MODULE.bazel
  27. MODULE.bazel.lock
  28. oci.MODULE.bazel
  29. README.md
  30. rust.MODULE.bazel
  31. SETUP.md
  32. shell.nix
  33. third_party.MODULE.bazel
  34. WORKSPACE
README.md

Monogon Monorepo

This is the main repository containing the source code for the Monogon Platform.

This is pre-release software - take a look, and check back later! In the meantime, join us on Matrix (#monogon-os-community:matrix.org) or Discord.

Environment

Our build environment is self-contained and requires only minimal host dependencies:

  • A Linux machine or VM.
  • Bazelisk >= v1.15.0 (or a working Nix environment).
  • A reasonably recent kernel with user namespaces enabled.
  • Working KVM with access to /dev/kvm (if you want to run tests).

Our docs assume that Bazelisk is available as bazel on your PATH.

Refer to SETUP.md for detailed instructions.

Monogon OS

The source code lives in //metropolis (Metropolis is the codename of Monogon OS).

See the //metropolis/README.md for a developer quick start guide, or see the Monogon OS Handbook for user documentation.