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sec: CHANGE Dockerfile multilayer and distroless #24

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Caffeine Fueled 2026-05-25 02:48:11 +02:00
parent 5eeddecf7d
commit fc1be4e278
Signed by: cf7
GPG key ID: CA295D643074C68C
1 changed files with 38 additions and 18 deletions
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@ -1,29 +1,49 @@
# syntax=docker/dockerfile:1 # syntax=docker/dockerfile:1.7
FROM python:3.12-slim
# ============================================================================
# Build stage: install Python dependencies into a dedicated prefix
# ============================================================================
FROM python:3.11-slim-bookworm AS builder
ENV PYTHONDONTWRITEBYTECODE=1 \ ENV PYTHONDONTWRITEBYTECODE=1 \
PYTHONUNBUFFERED=1 \ PYTHONUNBUFFERED=1 \
PIP_NO_CACHE_DIR=1 PIP_NO_CACHE_DIR=1 \
PIP_DISABLE_PIP_VERSION_CHECK=1
# Non-root user (uid 1000 to match the run script) # Install runtime deps into /install. --target keeps everything in one tree
RUN useradd -m -u 1000 appuser # so we can copy it cleanly to a distroless image without venv/shebang issues.
RUN pip install --target=/install \
fastapi==0.115.* \
"uvicorn[standard]==0.30.*" \
redis==5.0.*
WORKDIR /home/appuser/app # Pre-compile bytecode for faster cold start under a read-only rootfs
RUN python -m compileall -q /install
# (Optional) tini for proper signal handling # ============================================================================
RUN apt-get update && apt-get install -y --no-install-recommends tini \ # Runtime stage: distroless Python 3.11, non-root, no shell
&& rm -rf /var/lib/apt/lists/* # ============================================================================
# gcr.io/distroless/python3-debian12 ships Python 3.11 with NO shell, NO
# package manager, and NO setuid binaries. The :nonroot tag pins USER to
# uid 65532 / gid 65532.
FROM gcr.io/distroless/python3-debian12:nonroot
# Runtime deps ENV PYTHONDONTWRITEBYTECODE=1 \
RUN pip install --no-cache-dir fastapi==0.115.* uvicorn[standard]==0.30.* redis==5.0.* PYTHONUNBUFFERED=1 \
PYTHONPATH=/app/lib
# Copy your app WORKDIR /app
COPY --chown=appuser:appuser app.py .
COPY --chown=appuser:appuser favicon.ico .
USER appuser # Site-packages first (rarely changes → maximises layer cache)
COPY --from=builder --chown=nonroot:nonroot /install /app/lib
# Application source (changes most often → its own layer)
COPY --chown=nonroot:nonroot app.py favicon.ico /app/
USER nonroot
EXPOSE 8000 EXPOSE 8000
ENTRYPOINT ["/usr/bin/tini","--"] # Module form (-m uvicorn) sidesteps broken shebangs in /app/lib/bin/uvicorn
CMD ["uvicorn","app:app","--host","0.0.0.0","--port","8000"] # (those were generated against the builder's Python path, not distroless's).
ENTRYPOINT ["/usr/bin/python3", "-m", "uvicorn"]
CMD ["app:app", "--host", "0.0.0.0", "--port", "8000"]