61 lines
2.3 KiB
Docker
61 lines
2.3 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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# We deliberately do NOT use python:3.11-slim-bookworm here — that image is
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# Python.org's, which installs Python to /usr/local with an RPATH pointing
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# back into /usr/local/lib. Distroless has libpython under /usr/lib, so the
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# RPATH would break. Debian's apt-installed python3 lives at the same paths
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# as distroless's, so symlinks and libpython all 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 into the venv's site-packages
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RUN pip install \
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fastapi==0.115.* \
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"uvicorn[standard]==0.30.*" \
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redis==5.0.*
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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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# ============================================================================
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# Runtime stage: distroless Python 3.11, non-root, 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; its bin/python symlink resolves against
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# distroless's /usr/bin/python3 and Debian's libpython at /usr/lib/...
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COPY --from=builder --chown=nonroot:nonroot /opt/venv /opt/venv
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# Application source (its own layer so source-only changes don't bust dep cache)
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COPY --chown=nonroot:nonroot app.py favicon.ico /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 ["app:app", "--host", "0.0.0.0", "--port", "8000"]
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