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jakman85andClaude Opus 5.5 f65c12b395 feat(images): build on rootless BuildKit over mTLS; verification moves into Containerfile verify stages
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]>
2026-10-29 23:59:55 -05:00

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YAML

---
# The address CI dials: tcp://buildkitd.buildkit.svc.cluster.local:1234 (platform/buildkit/
# versions.env), mTLS only. ClusterIP — never exposed on the Gateway.
apiVersion: v1
kind: Service
metadata:
name: buildkitd
namespace: buildkit
labels:
app.kubernetes.io/name: buildkitd
spec:
type: ClusterIP
selector:
app.kubernetes.io/name: buildkitd
ports:
- name: buildkit
port: 1234
targetPort: buildkit
protocol: TCP