Question

这是Dockerfile的内容，我从高山映像更改为瘦身映像。我真的很想知道为什么要花这么长时间，我认为这与所有aps im更新和apt-get update中的安装有关。我可能正在重新安装可能不需要的软件包或不需要做的事情，有没有办法加快速度？

# pull official base image
FROM python:3.8-slim-buster

# set work directory
WORKDIR /opt/workspace

# set environment variables
ENV PYTHONDONTWRITEBYTECODE 1
ENV PYTHONUNBUFFERED 1

# Need this crap for wkhtml old install because any version after this doesn't work with charts and javascript
RUN echo "deb http://security.debian.org/debian-security jessie/updates main" >> /etc/apt/sources.list

# Pillow and Psycopg Dependencies
RUN apt-get update && apt-get install -y --no-install-recommends \
        build-essential \
        wget \ 
        libpq-dev \
        libpng-dev \
        libjpeg-dev \
        python-dev \
        postgresql-client \
        python3-pip \
        python3-setuptools \
        python3-wheel \
        python3-cffi \
        libssl1.0.0 \
        libpng12-0 \
        xfonts-base \
        xfonts-75dpi \
        libcairo2 \
        libpango-1.0-0 \
        libpangocairo-1.0-0 \
        libgdk-pixbuf2.0-0 \
        libffi-dev \
        shared-mime-info\
        gcc \
        musl-dev \
        python3-dev \
        tk-dev \
        uuid-dev \ 
    && rm -rf /var/lib/apt/lists/*

# fetch wait for it script
RUN wget -q -O /usr/bin/wait-for-it https://raw.githubusercontent.com/vishnubob/wait-for-it/master/wait-for-it.sh && \
    chmod +x /usr/bin/wait-for-it

RUN pip install psycopg2

# bunch of wkhtmltopdf shit only works with charts on this image.
RUN wget http://archive.ubuntu.com/ubuntu/pool/main/libj/libjpeg-turbo/libjpeg-turbo8_2.0.3-0ubuntu1_amd64.deb
RUN dpkg -i libjpeg-turbo8_2.0.3-0ubuntu1_amd64.deb

RUN wget https://github.com/wkhtmltopdf/wkhtmltopdf/releases/download/0.12.2.1/wkhtmltox-0.12.2.1_linux-trusty-amd64.deb
RUN dpkg -i wkhtmltox-0.12.2.1_linux-trusty-amd64.deb

# Install Dependencies
COPY requirements.txt /opt/workspace/requirements.txt
RUN pip install --no-cache-dir -r requirements.txt

# copy entrypoint.sh
COPY ./entrypoint.sh /opt/workspace/entrypoint.sh

# copy project
COPY . /opt/workspace

# run entrypoint.sh
ENTRYPOINT ["/opt/workspace/entrypoint.sh"]

编辑：收到答案后，我已将dockerfile更新为以下内容。记住，我需要使用apt-get安装的唯一软件包是wkhtmltopdf需要运行的软件包！它现在运行速度快得多，并且工作得更好。

FROM python:3.8-slim-buster

# set work directory
WORKDIR /opt/workspace

# set environment variables
ENV PYTHONDONTWRITEBYTECODE 1
ENV PYTHONUNBUFFERED 1
ENV DEBIAN_FRONTEND=noninteractive

# Need this crap for wkhtml old install
RUN echo "deb http://security.debian.org/debian-security jessie/updates main" >> /etc/apt/sources.list

RUN apt-get update && apt-get install -y --no-install-recommends \
        wget \
        fontconfig \
        xfonts-base \
        xfonts-75dpi \
        libssl1.0.0 \
        libpq-dev \
        libpng-dev \
        libjpeg-dev \
        libffi-dev \
        libpng12-0 \
        libxext6 \
        libx11-6 \
        libxrender1 \ 
        gcc \
    && rm -rf /var/lib/apt/lists/*

# fetch wait for it script
RUN wget -q -O /usr/bin/wait-for-it https://raw.githubusercontent.com/vishnubob/wait-for-it/master/wait-for-it.sh && \
    chmod +x /usr/bin/wait-for-it

# bunch of wkhtmltopdf shit only works with charts on this image.
RUN wget http://archive.ubuntu.com/ubuntu/pool/main/libj/libjpeg-turbo/libjpeg-turbo8_2.0.3-0ubuntu1_amd64.deb
RUN dpkg -i libjpeg-turbo8_2.0.3-0ubuntu1_amd64.deb

RUN wget https://github.com/wkhtmltopdf/wkhtmltopdf/releases/download/0.12.2.1/wkhtmltox-0.12.2.1_linux-trusty-amd64.deb
RUN dpkg -i wkhtmltox-0.12.2.1_linux-trusty-amd64.deb

# Install Dependencies
COPY requirements.txt /opt/workspace/requirements.txt
RUN pip install --no-cache-dir -r requirements.txt

# copy entrypoint.sh
COPY ./entrypoint.sh /opt/workspace/entrypoint.sh

# copy project
COPY . /opt/workspace

# run entrypoint.sh
ENTRYPOINT ["/opt/workspace/entrypoint.sh"]

Answer 1

这里有很多问题。首先，有一些您不需要的软件包：

您要安装python两次。您正在安装python（ Debian Python软件包），但是Docker python映像具有自己的Python版本（在/ usr / local中），并且已经有dev标头。您不需要它，并且会导致混乱，因为您最终获得了两个版本的Python（https://pythonspeed.com/articles/importerror-docker/）。
musl-dev是不必要的。 Debian使用glibc，而不是musl。我怀疑这是来自Alpine的延期。
您正在安装编译器，通常是一堆C头文件，所有这些* -dev软件包。您完全有可能根本不需要！在Alpine上，您需要编译所有内容，因为Alpine无法使用普通的二进制轮子。（https://pythonspeed.com/articles/alpine-docker-python/）由于您使用的是Debian，因此很可能您所有的操作都具有二进制轮子。您仍然需要自己的代码使用编译器，但是如果使用的是纯Python，则很有可能。

所以我的建议是：删除整个apt-get行。没有它的机会很大。

Docker映像需要很长时间才能构建

1 个答案: