m/p/watchdog: add watchdog package

This adds the watchdog package for interfacing with devices implementing
the Linux watchdog API. There is one alternative implementation at
github.com/mdlayher/watchdog but it is too minimal for our use case.

The kernel API contains a bunch of weird status bits only relevant for
physical watchdog cards which are not made accessible through the
Go package.

Sadly there are no integration tests for this package as ktest wouldn't
work for this because a) no watchdog HW and b) the test success depends
on a condition outside the kernel.

Change-Id: If138a97bc655025da4426665f8cbf1f093cc3bb1
Reviewed-on: https://review.monogon.dev/c/monogon/+/2142
Reviewed-by: Serge Bazanski <serge@monogon.tech>
Tested-by: Jenkins CI
2 files changed
tree: 0d3ffd008695edc1a4b9afde63ac8f149d7d6d94
  1. .github/
  2. build/
  3. cloud/
  4. go/
  5. intellij/
  6. metropolis/
  7. net/
  8. third_party/
  9. tools/
  10. .bazelignore
  11. .bazelproject
  12. .bazelrc
  13. .bazelrc.sandboxroot
  14. .bazelversion
  15. .git-ignore-revs
  16. .gitignore
  17. BUILD.bazel
  18. CODING_STANDARDS.md
  19. go.mod
  20. go.sum
  21. LICENSE
  22. README.md
  23. SETUP.md
  24. shell.nix
  25. 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!

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

Run a single node demo cluster

Build CLI and node image:

bazel build //metropolis/cli/dbg //:launch --config dbg

Launch an ephemeral test node:

bazel test //:launch --config dbg --test_output=streamed

Run a kubectl command while the test is running:

bazel-bin/metropolis/cli/dbg/dbg_/dbg kubectl describe node

Test suite

Run full test suite:

bazel test --config dbg //...