Kubernetes VM Stack v1.36.6-kubevirt1.9.1 build recipe

github.com/kubernetes/kubernetes (v1.36.6) at 1b2171b110bb2a2542e1322035c6583ec86eb976

• Base imagegolang:1.26.10-bookworm@sha256:632dff7351799a5a9954a48dc06670ade72ee44e8c351cdc0e5a57af2fea21af
• BuildKitmoby/buildkit:v0.31.2
  sha256:e0e67ea9c4bb07bdef683e29f70f3b623d1eb9c82274a9ec04e6bb0511449fb0
• Build methodsource-rebuild-go
• SOURCE_DATE_EPOCH1793102572 (2026-10-27T12:02:52Z)
• Target digest (linux/amd64)sha256:0268790dadac6fbc392784cb7f77f996526f4d1b6394bb30228d19ddaae062e9
• Target config digestsha256:46ed88f233dc993f1e2a59dac2e31b3efbc8b370f58b6b063a79db1ff1931f28
• Checksummed kit files29,345 (CHECKSUMS.sha256)

# =====================================================================
# Kubernetes VM Stack L-009 HERMETIC OFFLINE BUILD: the canonical, attestation-producing build. build_kit runs
#   docker buildx build --builder readystack-builder-max --network=none
#     --attest type=provenance,mode=max,version=v1 --attest type=sbom --push <directory context>
# Pinned-public-base + vendored model: golang 1.26.10 pinned BY DIGEST (BASE_IMAGE_DIGESTS.lock) compiles stack-bundle
# from the kit's stack-bundle.go (standard library only); vendored/kubernetesvmstack-src is the kit's bundle/.
# Dockerfile and Dockerfile.offline are byte copies of this file (the repo-wide convention).
#
# SHAPE: a BUNDLE IMAGE (owner 2026-10-29: the stack ships as an image). FROM scratch: /kubernetesvmstack holds the
# install bundle (install/), the pin manifest (kubevirt-stack.json), the operator runbook and the record of its cluster
# run (runbook/), and SHA256SUMS of every file; /usr/local/bin/stack-bundle checks them (`verify`, the default command
# and the component check), lists them (`list`) and prints the stack's version (`version`). It runs no service: its
# default user is 65534:65534.
# =====================================================================
FROM golang:1.26.10-bookworm@sha256:632dff7351799a5a9954a48dc06670ade72ee44e8c351cdc0e5a57af2fea21af AS build
WORKDIR /src
COPY stack-bundle.go main.go
COPY stack-bundle.mod go.mod
ENV CGO_ENABLED=0 GOTOOLCHAIN=local GOFLAGS="-buildvcs=false" GOPROXY=off
# the stack's version (strategies/kubernetesvmstack.json, the pin manifest's own) is stamped into the program; the ARG is
# the kit's version pin (scripts/check-kit-version.py: a stack's release is its own version, not its source.ref)
ARG STACK_VERSION=v1.36.6-kubevirt1.9.1
RUN go build -trimpath -ldflags="-s -w -X main.version=${STACK_VERSION}" -o /out/stack-bundle . && \
    [ "$(go version /out/stack-bundle | awk '{print $2}')" = go1.26.10 ]

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#!/usr/bin/env bash
# =============================================================================
# ReadyStack — offline reproducible rebuild.
#
# Rebuilds this product's image from THIS ARCHIVE ALONE, with no network access
# of any kind, and prints the resulting linux/amd64 image-manifest digest.
# Run ./VERIFY_OFFLINE.sh afterwards to assert it equals the published digest.
#
# Requirements: linux/amd64 Docker host, docker buildx >= 0.30, jq, tar.
# No git, no registry access, no additional tooling.
#
#   ./BUILD_OFFLINE.sh                the rebuild (OCI image + a docker-loadable copy)
#   ./BUILD_OFFLINE.sh --provenance   the same rebuild with SLSA v1 build provenance (mode=max) attached to the OCI
#                                     image, generated by BuildKit, not by any build step. Run on your own hardened,
#                                     isolated build platform and sign that provenance with a key the build cannot
#                                     reach, and the result meets SLSA Build Level 3 (see REBUILD.md). The image
#                                     digest is the same either way.
# =============================================================================
set -euo pipefail
PROVENANCE=0
for arg in "$@"; do
  case "$arg" in
    --provenance) PROVENANCE=1 ;;
    -h|--help) sed -n '2,20p' "$0"; exit 0 ;;

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