m/node/kubernetes: implement storage resizing

This implements persistent volume resizing in the storage provisioner.
The logic is based on https://github.com/kubernetes-csi/external-resizer

The mutation caches are an optimization to prevent unnecessary repeated
processing, because they make the controller remember changes that it
has made itself, when the watch events for those changes have not
arrived yet.

The controller supports the RecoverVolumeExpansionFailure feature, which
allows reducing the requested size when the previous resize fails due to
insufficient space. When resize fails, it is retried with backoff.

Change-Id: I0f3d40c1a592b30d25739f5d20b529dfe25dfbe1
Reviewed-on: https://review.monogon.dev/c/monogon/+/4008
Reviewed-by: Lorenz Brun <lorenz@monogon.tech>
Tested-by: Jenkins CI
7 files changed
tree: 46517933cf9c0d9fc18ccf085dcf335d664e2b94
  1. .github/
  2. .vscode/
  3. build/
  4. cloud/
  5. go/
  6. intellij/
  7. metropolis/
  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.sum
  24. LICENSE
  25. MODULE.bazel
  26. MODULE.bazel.lock
  27. README.md
  28. SETUP.md
  29. shell.nix
  30. 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.