xiaoxia-saas/infra/docker/worker.Dockerfile

# ============================================================
# Worker Dockerfile - 优化版（多阶段构建 + 镜像瘦身 + cache mount加速）
# 优化项：
#   1. 多阶段构建：builder 阶段安装编译依赖，runtime 阶段只保留运行时
#   2. ffmpeg 静态编译替换：从 apt 安装(457MB) 改为静态二进制(~80MB)
#   3. Python 依赖瘦身：strip .so 调试符号 + 清理测试文件 + 清理缓存
#   4. pip cache mount：加速依赖下载（跨构建共享pip wheel缓存）
#   5. ffmpeg cache mount：避免每次重新下载静态编译包
# ============================================================

# ==================== Builder 阶段 ====================
FROM git.xiaoxiajianji.com/xiaoxia/base/python:3.12-slim AS builder

# 使用阿里云镜像加速
RUN sed -i 's|deb.debian.org|mirrors.aliyun.com|g' /etc/apt/sources.list.d/debian.sources 2>/dev/null || \
    sed -i 's|deb.debian.org|mirrors.aliyun.com|g' /etc/apt/sources.list 2>/dev/null || true

# 安装编译工具（仅 builder 需要）
RUN apt-get update && apt-get install -y --no-install-recommends \
    gcc \
    g++ \
    python3-dev \
    binutils \
    wget \
    xz-utils \
    && rm -rf /var/lib/apt/lists/*

# ---- 下载静态编译 ffmpeg（带缓存，避免每次重新下载）----
RUN --mount=type=cache,target=/tmp/ffmpeg-cache,sharing=locked \
    cd /tmp \
    && if [ ! -f /tmp/ffmpeg-cache/ffmpeg-release-amd64-static.tar.xz ]; then \
         wget -q -O /tmp/ffmpeg-cache/ffmpeg-release-amd64-static.tar.xz \
           https://johnvansickle.com/ffmpeg/releases/ffmpeg-release-amd64-static.tar.xz; \
       fi \
    && tar xf /tmp/ffmpeg-cache/ffmpeg-release-amd64-static.tar.xz \
    && cp ffmpeg-*-amd64-static/ffmpeg /usr/local/bin/ffmpeg \
    && cp ffmpeg-*-amd64-static/ffprobe /usr/local/bin/ffprobe \
    && chmod +x /usr/local/bin/ffmpeg /usr/local/bin/ffprobe \
    && rm -rf ffmpeg-*

# ---- 安装 Python 依赖 ----
WORKDIR /tmp

# 创建 venv
RUN python -m venv /opt/venv
ENV PATH="/opt/venv/bin:$PATH"

# 基础依赖
COPY requirements-base.txt /tmp/requirements-base.txt
RUN --mount=type=cache,target=/root/.cache/pip,sharing=locked \
    pip install --no-cache-dir -i https://mirrors.aliyun.com/pypi/simple/ --trusted-host mirrors.aliyun.com \
    -r /tmp/requirements-base.txt \
    && rm /tmp/requirements-base.txt

# Worker 专属大包
COPY requirements-worker.txt /tmp/requirements-worker.txt
RUN --mount=type=cache,target=/root/.cache/pip,sharing=locked \
    pip install --no-cache-dir -i https://mirrors.aliyun.com/pypi/simple/ --trusted-host mirrors.aliyun.com \
    -r /tmp/requirements-worker.txt \
    && rm /tmp/requirements-worker.txt

# 业务依赖
COPY requirements.txt /tmp/requirements.txt
RUN --mount=type=cache,target=/root/.cache/pip,sharing=locked \
    pip install --no-cache-dir -i https://mirrors.aliyun.com/pypi/simple/ --trusted-host mirrors.aliyun.com \
    -r /tmp/requirements.txt \
    && rm /tmp/requirements.txt

# ---- Python 依赖瘦身 ----
# 1. strip .so 文件的调试符号（节省约 80-100MB）
RUN find /opt/venv -name "*.so" -type f -exec strip --strip-all {} \; 2>/dev/null || true

# 2. 清理测试文件（节省约 20MB）
RUN find /opt/venv -type d -name "tests" -exec rm -rf {} + 2>/dev/null; \
    find /opt/venv -type d -name "test" -exec rm -rf {} + 2>/dev/null; \
    find /opt/venv -name "test_*.py" -delete 2>/dev/null || true

# 3. 清理 .pyc 缓存和 __pycache__（节省约 10MB，运行时按需生成）
RUN find /opt/venv -type d -name "__pycache__" -exec rm -rf {} + 2>/dev/null; \
    find /opt/venv -name "*.pyc" -delete 2>/dev/null || true

# 4. 清理 dist-info 中的文档
RUN find /opt/venv -name "*.dist-info" -type d -exec sh -c 'rm -f "$1"/DESCRIPTION.rst "$1"/INSTALLER "$1"/LICENSE* "$1"/WHEEL "$1"/entry_points.txt' _ {} \; 2>/dev/null || true

# ==================== Runtime 阶段 ====================
FROM git.xiaoxiajianji.com/xiaoxia/base/python:3.12-slim AS runtime

# 构建参数：版本号
ARG APP_VERSION=dev

# 使用阿里云镜像加速
RUN sed -i 's|deb.debian.org|mirrors.aliyun.com|g' /etc/apt/sources.list.d/debian.sources 2>/dev/null || \
    sed -i 's|deb.debian.org|mirrors.aliyun.com|g' /etc/apt/sources.list 2>/dev/null || true

# 安装最小运行时依赖（opencv-python-headless 需要 libglib2.0-0）
RUN apt-get update && apt-get install -y --no-install-recommends \
    libglib2.0-0 \
    && rm -rf /var/lib/apt/lists/*

# 从 builder 复制 ffmpeg 静态二进制
COPY --from=builder /usr/local/bin/ffmpeg /usr/local/bin/ffmpeg
COPY --from=builder /usr/local/bin/ffprobe /usr/local/bin/ffprobe

# 从 builder 复制 Python 虚拟环境
COPY --from=builder /opt/venv /opt/venv

# 设置工作目录
WORKDIR /app

# 复制应用代码
COPY apps/worker/ /app/apps/worker/
COPY apps/api/app/config.py /app/apps/api/app/config.py
COPY apps/api/app/core/ /app/apps/api/app/core/
COPY packages/ /app/packages/
COPY alembic.ini /app/alembic.ini
COPY migrations/ /app/migrations/

# 复制 Worker 启动脚本
COPY infra/docker/entrypoint-worker.sh /usr/local/bin/entrypoint-worker.sh
RUN chmod +x /usr/local/bin/entrypoint-worker.sh

# 设置 Python 路径
ENV PATH="/opt/venv/bin:$PATH"
ENV PYTHONPATH=/app:/app/packages
ENV PYTHONUNBUFFERED=1
ENV APP_VERSION=$APP_VERSION

# 创建非 root 用户运行 Worker
RUN groupadd -r celery && useradd -r -g celery -d /app -s /sbin/nologin celery \
    && mkdir -p /app/generated && chown celery:celery /app/generated

USER celery

# Worker 入口点
WORKDIR /app/apps/worker
CMD ["/usr/local/bin/entrypoint-worker.sh"]