metropolis: fix handling GPT holes

GPT tables can have "holes" i.e. unused partition slots. These are
represented as nil values. Code walking these tables did not consider
that partition entries might be nil.
Fix the call sites and improve the gpt package documentation to
explicitly mention the need to check IsUnused.

Change-Id: I27f5db31e14a4907a84d6069ddcc267b25871f72
Reviewed-on: https://review.monogon.dev/c/monogon/+/2208
Reviewed-by: Tim Windelschmidt <tim@monogon.tech>
Tested-by: Jenkins CI
3 files changed
tree: b6e2bfe17aa8ccb532aeca405e17fc2eda99dc5f
  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 //...