Apache Kafka 4.4.0 build recipe

github.com/apache/kafka (4.4.0-rc4) at 1156b2752aaa28eafc0b4c4d387e63356793268d

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/apache/kafka 4.4.0-rc4

• Base imageeclipse-temurin:25-jdk-noble@sha256:589ff4cc3f71aab462e7048a47a0d10edf57fbccde3fceea2281e610bf5880b4
• Base imageeclipse-temurin:25-jre-noble@sha256:ce8543ddd3070ccbeaac2106a74c9387ddeb8d47a1c43348345715c1ef245c7f
• BuildKitmoby/buildkit:v0.31.2
  sha256:e0e67ea9c4bb07bdef683e29f70f3b623d1eb9c82274a9ec04e6bb0511449fb0
• Build methodsource-rebuild-java
• SOURCE_DATE_EPOCH1791303144 (2026-10-06T16:12:24Z)
• Target digest (linux/amd64)sha256:d3f92612901df9e1b5427c406b7b4ddf8f46dcc56501ef558e7888fdd585eec4
• Target config digestsha256:7ffd1a2154b549b218e84ea7666be2404f4a9f1d561e9020df6636eadb5a9bef
• Checksummed kit files23,431 (CHECKSUMS.sha256)

# GENERATED L-009 hermetic Java build (--network=none, SBOM+SLSA-attestation-producing).
# Pinned bases; vendored source + gradle cache(s) + toolchain/runtime debs from Dockerfile.vendor.
FROM eclipse-temurin:25-jdk-noble@sha256:589ff4cc3f71aab462e7048a47a0d10edf57fbccde3fceea2281e610bf5880b4 AS jbuild
# dpkg-install the vendored build toolchain (git/unzip) — no apt, fully offline.
RUN --mount=type=bind,source=vendored/build-debs,target=/tmp/bdebs \
    set --; for f in /tmp/bdebs/*.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; }; }
WORKDIR /src
COPY vendored/kafka-src/ .
COPY vendored/caches/gradle-home/ /gradle-home/
ENV GRADLE_USER_HOME="/gradle-home"
ENV GRADLE_OPTS="-Dorg.gradle.daemon=false"
RUN GH="${GRADLE_USER_HOME:-/gradle-home}"; rm -rf "$GH"/caches/*/transforms "$GH"/caches/*/transforms-* "$GH"/caches/*/groovy-dsl "$GH"/caches/*/kotlin-dsl "$GH"/caches/*/generated-gradle-jars "$GH"/caches/*/dependencies-accessors "$GH"/caches/jars-* "$GH"/caches/build-cache-* 2>/dev/null; true
RUN mkdir -p "${GRADLE_USER_HOME:-/root/.gradle}/init.d" && printf '%s\n' 'allprojects { configurations.all { resolutionStrategy { force("at.yawk.lz4:lz4-java:1.11.4") } } }' > "${GRADLE_USER_HOME:-/root/.gradle}/init.d/kitforge-cve-forces.gradle" && cat "${GRADLE_USER_HOME:-/root/.gradle}/init.d/kitforge-cve-forces.gradle"
RUN cd /src && ./gradlew --no-daemon --offline --console=plain -PcommitId=1156b2752aaa28eafc0b4c4d387e63356793268d releaseTarGz
RUN mkdir -p /opt/kafka && tar -xzf /src/core/build/distributions/kafka_2.13-4.4.0.tgz -C /opt/kafka --strip-components=1 && rm -rf /opt/kafka/site-docs
RUN mkdir -p /opt/kafka/readystack-docker && cp /src/docker/resources/common-scripts/bash-config /src/docker/resources/common-scripts/configure /src/docker/resources/common-scripts/configureDefaults /src/docker/resources/common-scripts/run /src/docker/jvm/launch /opt/kafka/readystack-docker/ && sed -i '/SharedArchiveFile/d' /opt/kafka/readystack-docker/launch && ! grep -q SharedArchiveFile /opt/kafka/readystack-docker/launch
FROM eclipse-temurin:25-jre-noble@sha256:ce8543ddd3070ccbeaac2106a74c9387ddeb8d47a1c43348345715c1ef245c7f
ENV DEBIAN_FRONTEND=noninteractive PATH=/opt/kafka/bin:/opt/java/openjdk/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
RUN --mount=type=bind,source=vendored/debs,target=/tmp/debs \
    set --; for f in /tmp/debs/*.deb; do [ -e "$f" ] && set -- "$@" "$f"; done; \

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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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