pause 3.10.2 build recipe

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

Fetched once, with the network on, by the vendor step (Dockerfile.vendor) when the kit was made; the offline build uses the kit's vendored copies:

• git https://github.com/kubernetes/kubernetes.git v1.36.6

• Base imagegolang:1.26.10-bookworm@sha256:632dff7351799a5a9954a48dc06670ade72ee44e8c351cdc0e5a57af2fea21af
• BuildKitmoby/buildkit:v0.31.2
  sha256:e0e67ea9c4bb07bdef683e29f70f3b623d1eb9c82274a9ec04e6bb0511449fb0
• Build methodsource-rebuild-c
• SOURCE_DATE_EPOCH1793102572 (2026-10-27T12:02:52Z)
• Target digest (linux/amd64)sha256:6b74cfa71db2c51e1a21e3342402d3993573ea02a0c85063897eda87958dca26
• Target config digestsha256:a08577913f860cca67c84dd79abf66673b6c3a10ef17ce5ecbc89b187ce3c337
• Checksummed kit files29,302 (CHECKSUMS.sha256)

# =====================================================================
# pause 3.10.2 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 --attest type=sbom --push <context>
# Pinned-public-base + vendored model: golang 1.26.10-bookworm (its gcc 12.2, Debian bookworm) pinned BY DIGEST
# (BASE_IMAGE_DIGESTS.lock) compiles; vendored/pause-src is build/pause/ of kubernetes v1.36.6. The image is FROM scratch.
# Dockerfile and Dockerfile.offline are byte copies of this file (the repo-wide convention).
#
# SHAPE (upstream build/pause/Dockerfile + Makefile at v1.36.6): FROM scratch, the static /pause, compiled from
# linux/pause.c with the Makefile's CFLAGS (-Os -Wall -Werror -static -DVERSION=v$(TAG)-$(REV), TAG ?= 3.10.2) and
# stripped as the Makefile strips it; USER 65535:65535 and ENTRYPOINT ["/pause"] as upstream. REV is empty, as in
# upstream's published build: registry.k8s.io/pause:3.10.2 (sha256:f548e0e8e3dc1896ca956272154dde3314e8cc4fde0a57577ee9fa1c63f5baf4)
# answers `/pause -v` with "pause.c v3.10.2-" (measured 2026-10-28), and so does this one.
# =====================================================================
FROM golang:1.26.10-bookworm@sha256:632dff7351799a5a9954a48dc06670ade72ee44e8c351cdc0e5a57af2fea21af AS build
ARG SOURCE_DATE_EPOCH=1793102572
WORKDIR /src
COPY vendored/pause-src/ .
COPY static-sbom.py /usr/local/bin/static-sbom.py
# TAG is read from build/pause/Makefile and must be 3.10.2 (the pin manifest's pause, kubeadm v1.36.6's PauseVersion);
# the binary must then report exactly pause.c v$(TAG)-. gcc -static copies glibc (libc6-dev's libc.a) and libgcc
# (libgcc-12-dev) into it, which no scanner can see in a binary: static-sbom.py declares both, at the builder's exact
# package versions, in an SPDX document the image ships under /usr/local/share/readystack/sbom/ (owner rule 2026-10-28:
# make linked code visible; chain 781 found the image read as 0 packages).

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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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