Fluent Bit v5.1.5 build recipe

github.com/fluent/fluent-bit (v5.1.5) at 0039c4f0d1b530bedd8448df2fa4c301d58a5b91

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/fluent/fluent-bit v5.1.5

• Base imageubuntu:24.04@sha256:24737cef17f4e22b1977df7d9a05e77c4e28b7da5b8911f8d8ccda136bf3573c
• BuildKitmoby/buildkit:v0.31.2
  sha256:e0e67ea9c4bb07bdef683e29f70f3b623d1eb9c82274a9ec04e6bb0511449fb0
• Build methodsource-rebuild-c
• SOURCE_DATE_EPOCH1792554706 (2026-10-21T03:51:46Z)
• Target digest (linux/amd64)sha256:bd3c6947d6a7f8b76e2bccc19ddbf3d53f92bc834f2bf5a7a1e17efe624af8c4
• Target config digestsha256:5c48813d7249d1f6c49dccdeb71d86bc1f94f4a638b9c9a72e795ae18f27f615
• Checksummed kit files24,615 (CHECKSUMS.sha256)

# GENERATED L-009 hermetic C build (--network=none, SBOM+SLSA-attestation-producing).
# Pinned bases; vendored source (in-tree deps) + extra build debs + runtime debs from Dockerfile.vendor.
FROM ubuntu:24.04@sha256:24737cef17f4e22b1977df7d9a05e77c4e28b7da5b8911f8d8ccda136bf3573c AS cbuild
# dpkg-install the vendored EXTRA build debs (pkg-config/libssl-dev/...) — gcc/make are in the builder.
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/fluentbit-src/ .
ARG SOURCE_DATE_EPOCH=1792554706
ENV SOURCE_DATE_EPOCH=${SOURCE_DATE_EPOCH}
RUN cmake -S . -B build -DFLB_RELEASE=On -DFLB_SIMD=On -DFLB_JEMALLOC=On -DFLB_TLS=On -DFLB_SHARED_LIB=Off -DFLB_EXAMPLES=Off -DFLB_HTTP_SERVER=On -DFLB_LOG_NO_CONTROL_CHARS=On -DFLB_CHUNK_TRACE=Off -DFLB_IN_SYSTEMD=On -DFLB_IN_KAFKA=On -DFLB_OUT_KAFKA=On -DFLB_OUT_PGSQL=Off -DFLB_IN_EXEC=Off -DFLB_WASM=Off -DFLB_IN_EXEC_WASI=Off -DFLB_FILTER_WASM=Off -DFLB_WAMRC=Off -DFLB_PROXY_GO=Off -DFLB_CUSTOM_CALYPTIA=Off -DFLB_IN_CALYPTIA_FLEET=Off -DFLB_OUT_CALYPTIA=Off -DFLB_ZIG=Off
RUN cmake --build build -j"$(nproc)"
RUN install -d /fluent-bit/bin /fluent-bit/etc && install -m 0755 build/bin/fluent-bit /fluent-bit/bin/fluent-bit && install -m 0644 conf/parsers.conf conf/parsers_ambassador.conf conf/parsers_java.conf conf/parsers_extra.conf conf/parsers_openstack.conf conf/parsers_cinder.conf /fluent-bit/etc/
RUN /fluent-bit/bin/fluent-bit --version > /tmp/flb.version && cat /tmp/flb.version && grep -qF 'Fluent Bit v5.1.5' /tmp/flb.version && grep -qF 'Git commit: 0039c4f0d1b530bedd8448df2fa4c301d58a5b91' /tmp/flb.version
FROM ubuntu:24.04@sha256:24737cef17f4e22b1977df7d9a05e77c4e28b7da5b8911f8d8ccda136bf3573c
ENV DEBIAN_FRONTEND=noninteractive PATH=/fluent-bit/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; \
    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); \

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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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