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feat(images): build on rootless BuildKit over mTLS; verification moves into Containerfile verify stages

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Operator decision on PR #81: no CI job may reach a privileged daemon. The act runner is untouched.

- platform/buildkit (+ clusters/base/buildkit.yaml): moby/buildkit v0.34.1-rootless pinned by
  digest, uid 1000, not privileged; caps drop ALL + SETUID/SETGID, seccomp/AppArmor Unconfined,
  read-only rootfs (each measured under podman). cert-manager CA + server/client certs, ClusterIP
  :1234, default-deny with ingress only from the act-runner pod (DinD masquerades jobs to it).
  No Kyverno exception: every applied policy matches app-namespace=true only.
- Each Containerfile names its shipped stage and ends in a `verify` stage holding every former
  `docker run` assertion (uid 65532, RUN --network=none, writable-path inventory standing in for
  the read-only rootfs). The old `&& echo` checks that could never fail are real assertions now.
- images.sh drives buildkitd with a pinned buildx (sha256-checked) via bake; PRs build verify
  targets with agent-runner FROM the in-run toolbox (target: context); main verifies, then pushes.
  Fails loudly when the builder secrets are absent or buildkitd is unreachable.
- infra/gitea/buildkit-client-secret.sh copies the client cert into Actions secrets.

Co-Authored-By: Claude Opus 5.5 <[email protected]>
This commit is contained in:
jakman85andClaude Opus 5.5 committed 2026-10-29 22:21:03 -05:00
1 parent 65a7769f55
commit 310deb0f7d
28 files changed
+1490 -608
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conformance/tests/l0-static/alert-rules-unit-tested/check.sh
+2 -2
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@@ -250,8 +250,8 @@ check('echo "promtool=${PROMTOOL_VERSION}"' in cf_text,
# The build recipe moved from dev.sh into build-image.sh on 2026-10-29, so that `dev.sh build`
# and the CI image pipeline (.gitea/workflows/images.yaml) share ONE recipe. Check the recipe.
BUILDSH = ROOT / "infra/devcontainer/build-image.sh"
check(BUILDSH.is_file() and "--build-arg PROMTOOL_VERSION=" in BUILDSH.read_text(),
"infra/devcontainer/build-image.sh does not pass --build-arg PROMTOOL_VERSION — the ARG "
check(BUILDSH.is_file() and '"PROMTOOL_VERSION=$PROMTOOL_VERSION"' in BUILDSH.read_text(),
"infra/devcontainer/build-image.sh does not pass PROMTOOL_VERSION in its BUILD_ARGS — the ARG "
"would be empty and the build would fetch a bogus URL")
INSTALL = ROOT / ".gitea/workflows/scripts/install-tools.sh"