OpenBao v2.7.2 build recipe

github.com/openbao/openbao (v2.7.2) at 9e0a0d3c3504a0a00b45e61355afac5e35c78379

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/openbao/openbao v2.7.2

• Base imagegolang:1.27.3-bookworm@sha256:972b4110ba0f47539a975c31e52c64765e1ff19f2d74469ae4a595c6676e80a5
• Base imageubuntu:24.04@sha256:24737cef17f4e22b1977df7d9a05e77c4e28b7da5b8911f8d8ccda136bf3573c
• BuildKitmoby/buildkit:v0.31.2
  sha256:e0e67ea9c4bb07bdef683e29f70f3b623d1eb9c82274a9ec04e6bb0511449fb0
• Build methodsource-rebuild-go
• SOURCE_DATE_EPOCH1793043147 (2026-10-26T19:32:27Z)
• Target digest (linux/amd64)sha256:4eafd7bfd952cc01a016796173f74b90d1cd329b8cf8c25f63de5efd0d538696
• Target config digestsha256:b85a6ef3e59e11d7b7807c4dc2223b3715c3c68e1d0f98976b8814841455eceb
• Checksummed kit files23,078 (CHECKSUMS.sha256)

# GENERATED L-009 hermetic build (--network=none, SBOM+SLSA-attestation-producing).
# Pinned bases from BASE_IMAGE_DIGESTS.lock; vendored Go tree + debs from Dockerfile.vendor.
FROM golang:1.27.3-bookworm@sha256:972b4110ba0f47539a975c31e52c64765e1ff19f2d74469ae4a595c6676e80a5 AS build_bao
COPY vendored/openbao-src/ /src/
WORKDIR /src/
ENV CGO_ENABLED=0 GOTOOLCHAIN=local GOWORK=off GOFLAGS="-mod=vendor -buildvcs=false" GOPROXY=off SOURCE_DATE_EPOCH=1793043147
RUN go build -trimpath -ldflags='-s -w -X github.com/openbao/openbao/v2/internal/version.fullVersion=2.7.2 -X github.com/openbao/openbao/v2/internal/version.GitCommit=9e0a0d3c3504a0a00b45e61355afac5e35c78379' -o /bao . && /bao version > /tmp/bao.version 2>&1; cat /tmp/bao.version; grep -qF '2.7.2' /tmp/bao.version || { echo 'bao version does not report 2.7.2'; exit 1; }
FROM ubuntu:24.04@sha256:24737cef17f4e22b1977df7d9a05e77c4e28b7da5b8911f8d8ccda136bf3573c
ENV DEBIAN_FRONTEND=noninteractive BAO_ADDR=http://127.0.0.1:8200
RUN --mount=type=bind,source=vendored/debs,target=/tmp/debs \
    set --; for f in /tmp/debs/*.deb; do [ -e "$f" ] && set -- "$@" "$f"; done; \
    for pass in 1 2 3 4 5; do [ $# -eq 0 ] || dpkg -i --skip-same-version "$@" >/dev/null 2>&1 && break; done; \
    dpkg --configure -a && bad= && for d in "$@"; do p=$(dpkg-deb -f "$d" Package) v=$(dpkg-deb -f "$d" Version); \
      case "$(dpkg-query -W -f='${Version} ${db:Status-Abbrev}' "$p" 2>/dev/null)" in "$v ii"*) ;; *) bad="$bad $p=$v" ;; esac; done && \
    { [ -z "$bad" ] || { echo "vendored debs not installed at their vendored version:$bad" >&2; false; }; } && \
    rm -rf /var/lib/apt/lists/* \
           /var/log/dpkg.log /var/log/alternatives.log /var/log/apt /var/cache/ldconfig/aux-cache /var/cache/fontconfig
ARG SOURCE_DATE_EPOCH=1793043147
RUN (! getent passwd ubuntu >/dev/null || userdel --remove ubuntu) && groupadd -r -g 1000 openbao && useradd -r -u 100 -g openbao -d /openbao -m openbao && \
    mkdir -p /openbao/data /openbao/config && chown -R openbao:openbao /openbao/data /openbao/config && \
    : "${SOURCE_DATE_EPOCH:?SOURCE_DATE_EPOCH must be set for a reproducible build}" && \
    sed -ri "s/^([^:]*:[^:]*):[0-9]*:/\1:$((SOURCE_DATE_EPOCH/86400)):/" /etc/shadow && \
    rm -f /etc/passwd- /etc/shadow- /etc/group- /etc/gshadow-
COPY --from=build_bao /bao /usr/bin/bao

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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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