65 lines
2.6 KiB
Docker
65 lines
2.6 KiB
Docker
# syntax=docker/dockerfile:1.7
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# ============================================================================
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# Build stage: Debian 12's Python (paths/libs match the distroless runtime)
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# ============================================================================
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# Don't use python:3.11-slim-bookworm — that image installs Python to /usr/local
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# with an RPATH that breaks under distroless. Debian's apt python3 lives at the
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# same paths as distroless's, so symlinks and libpython resolve correctly.
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FROM debian:12-slim AS builder
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ENV PYTHONDONTWRITEBYTECODE=1 \
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PYTHONUNBUFFERED=1 \
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PIP_NO_CACHE_DIR=1 \
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PIP_DISABLE_PIP_VERSION_CHECK=1
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RUN apt-get update \
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&& apt-get install -y --no-install-recommends \
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python3 python3-pip python3-venv \
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&& rm -rf /var/lib/apt/lists/*
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# Default (symlink) venv. /opt/venv/bin/python ends up as a symlink to
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# /usr/bin/python3, which distroless also provides.
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RUN python3 -m venv /opt/venv
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ENV PATH=/opt/venv/bin:$PATH
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# Install runtime deps (cached layer — only rebuilt when requirements.txt changes)
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COPY requirements.txt /tmp/requirements.txt
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RUN pip install -r /tmp/requirements.txt
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# Pre-compile bytecode for faster cold start on a read-only rootfs
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RUN python3 -m compileall -q /opt/venv
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# Pre-create writable mount points so the runtime rootfs can stay read-only.
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# `uploads/` always needs to be writable; `logs/` only if LOGGING_ENABLED=true.
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RUN mkdir -p /app/uploads /app/logs
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# ============================================================================
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# Runtime stage: distroless Python 3.11, non-root (uid 65532), no shell
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# ============================================================================
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# gcr.io/distroless/python3-debian12 ships Python 3.11 with NO shell, NO
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# package manager, and NO setuid binaries. The :nonroot tag pins USER to
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# uid 65532 / gid 65532.
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FROM gcr.io/distroless/python3-debian12:nonroot
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ENV PYTHONDONTWRITEBYTECODE=1 \
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PYTHONUNBUFFERED=1
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WORKDIR /app
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# Venv ships its site-packages; bin/python is a symlink resolved by distroless's
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# /usr/bin/python3 and Debian's libpython under /usr/lib.
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COPY --from=builder --chown=nonroot:nonroot /opt/venv /opt/venv
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# Pre-created data dirs owned by the runtime user (mount writable volumes here)
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COPY --from=builder --chown=nonroot:nonroot /app/uploads /app/uploads
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COPY --from=builder --chown=nonroot:nonroot /app/logs /app/logs
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# Application source — its own layer so app-only changes don't bust the dep cache
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COPY --chown=nonroot:nonroot main.py /app/
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USER nonroot
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EXPOSE 8000
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ENTRYPOINT ["/opt/venv/bin/python", "-m", "uvicorn"]
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CMD ["main:app", "--host", "0.0.0.0", "--port", "8000"]
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