Kubernetes Node v1.36.6 build recipe

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

Also built from source:

• github.com/containerd/containerd (v2.3.7) at 6f589cf13dc01a5b493911355427e05b2ff005d7
• github.com/opencontainers/runc (v1.5.2) at 29dd3dc2b13b4123162e5fe132504bb4b15569f1
• github.com/seccomp/libseccomp (v2.6.1)
• github.com/containernetworking/plugins (v1.9.1) at adc3e6b5b581638afbd194cf2e9319ecbb0151a1
• github.com/kubernetes-sigs/cri-tools (v1.36.0) at 88d8ad9d40f82726fda53c2d271e6172b4c619c9
• github.com/kubernetes/release (master) at 39b0d3dbd9a063e6fc2e26b819de566a1d33b72d

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
• git https://github.com/containerd/containerd.git v2.3.7
• git https://github.com/opencontainers/runc.git v1.5.2
• git https://github.com/containernetworking/plugins.git v1.9.1
• git https://github.com/kubernetes-sigs/cri-tools.git v1.36.0
• https://github.com/kubernetes/release.git
• https://github.com/kubernetes/release

• 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)sha256:0a264881a0b7357fb20767b0922661bf4ba4423b3e90e595195bf18748a8d79c
• Target config digestsha256:788d2009ba5705e8d590096a0ecefd651ba0ce9d370fd3d36010ac6b203e0e1b
• Checksummed kit files71,087 (CHECKSUMS.sha256)

# =====================================================================
# Kubernetes Node v1.36.6 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) is the only base;
# vendored/*-src are fully vendored Go trees (vendored/kubernetesnode-src is kubernetes v1.36.6; GOPROXY=off, vendor/);
# vendored/libseccomp is the libseccomp release tarball runc links statically (and Debian's gperf .deb its configure needs), vendored/k8s-release-templates the systemd units of the official packages.
# Dockerfile and Dockerfile.offline are byte copies of this file (the repo-wide convention).
#
# SHAPE: a HOST BUNDLE. The image is FROM scratch and holds only the files a kubeadm node's host needs, at the paths
# they are installed to: /usr/local/bin (kubelet, kubeadm, kubectl, containerd, containerd-shim-runc-v2, ctr, runc,
# crictl), /opt/cni/bin (the CNI plugins), /etc/systemd/system (kubelet.service + kubeadm's 10-kubeadm.conf drop-in,
# containerd.service), /etc/containerd (config and registry hosts.toml templates), /etc/crictl.yaml, /etc/default/kubelet,
# /etc/modules-load.d and /etc/sysctl.d, and /usr/local/share/kubernetesnode (VERSIONS, SHA256SUMS, licences). Every
# binary is static, so each one runs in this image with no OS underneath. The image runs no service: its default user is
# 65534:65534 (nobody) and its default command prints kubeadm's version. The same tree is also packed as a
# deterministic tarball (target `tarball`) that install-node.sh unpacks on an Ubuntu 24.04 host.
# =====================================================================

# --- kubernetes v1.36.6: kubelet, kubeadm, kubectl ----------------------------------------------------------------------
FROM golang:1.26.10-bookworm@sha256:632dff7351799a5a9954a48dc06670ade72ee44e8c351cdc0e5a57af2fea21af AS kubernetes-build
WORKDIR /k8s
COPY vendored/kubernetesnode-src/ .
ENV CGO_ENABLED=0 GOTOOLCHAIN=local GOFLAGS=-buildvcs=false GOPROXY=off

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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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