Traefik v3.7.16 build recipe

github.com/traefik/traefik (v3.7.16) at af6d927c51191ae1df104aaf907793386b816c28

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/traefik/traefik v3.7.16

• Base imagegolang:1.26.10-bookworm@sha256:632dff7351799a5a9954a48dc06670ade72ee44e8c351cdc0e5a57af2fea21af
• Base imageubuntu:24.04@sha256:24737cef17f4e22b1977df7d9a05e77c4e28b7da5b8911f8d8ccda136bf3573c
• BuildKitmoby/buildkit:v0.31.2
  sha256:e0e67ea9c4bb07bdef683e29f70f3b623d1eb9c82274a9ec04e6bb0511449fb0
• Build methodsource-rebuild-go
• SOURCE_DATE_EPOCH1792485846 (2026-10-20T08:44:06Z)
• Target digest (linux/amd64)sha256:f3d711110aab6de0a6062da2f35c31b3b3d18bc0b9eadbc95c03dff9ec7bbd81
• Target config digestsha256:2094696a5754be12f42fcb3022aac8e878fed74a0fe24a05a5e42c51a2a7b945
• Checksummed kit files24,556 (CHECKSUMS.sha256)

# =====================================================================
# L-009 HERMETIC OFFLINE BUILD (traefik) — the canonical, attestation-
# producing build. Run by build_kit's L-009 buildx:
#   docker buildx build --builder readystack-builder-max --network=none
#     --attest type=provenance,mode=max --attest type=sbom --push <git-context>
# That command CREATES the DockerHub image WITH SBOM + SLSA-max provenance.
#
# Pinned-public-base + vendored model (the container builder can't see host
# images, so everything is vendored):
#   - golang 1.26.10 + ubuntu pinned BY DIGEST (BASE_IMAGE_DIGESTS.lock; RUN steps
#     are --network=none hermetic)
#   - vendored/traefik-src : fully-vendored Go tree + prebuilt webui/static
#                            (GOPROXY=off, -mod=vendor)
#   - vendored/debs        : apt CVE-upgrade closure + runtime pkgs, dpkg offline
# =====================================================================
FROM golang:1.26.10-bookworm@sha256:632dff7351799a5a9954a48dc06670ade72ee44e8c351cdc0e5a57af2fea21af AS build
WORKDIR /src
COPY vendored/traefik-src/ .
ENV CGO_ENABLED=0 GOTOOLCHAIN=local GOFLAGS="-mod=vendor -buildvcs=false" GOPROXY=off
RUN go build -trimpath -ldflags='-s -w -X github.com/traefik/traefik/v3/pkg/version.Version=3.7.16' \
      -o /traefik ./cmd/traefik
# Fail closed on a stale toolchain. The digest this kit used to pin under golang:1.26-bookworm
# was go1.26.4 (published 2026-06-11) long after the tag had moved on, so chain 491 shipped
# stdlib 1.26.4 with 7 fixable critical/high (fixed in 1.26.6). `go version <binary>` reads the

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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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