如何在docker中安装lxml

Question

我想在docker中部署我的python项目,我在requirments.txt中写道lxml>=3.5.0,因为项目需要lxml.这是我的dockfile:

FROM gliderlabs/alpine:3.3
RUN set -x \
    && buildDeps='\
        python-dev \
        py-pip \
        build-base \
    ' \
    && apk --update add python py-lxml $buildDeps \
    && rm -rf /var/cache/apk/* \
    && mkdir -p /app
ENV INSTALL_PATH /app
WORKDIR $INSTALL_PATH
COPY requirements-docker.txt ./
RUN pip install -r requirements.txt
COPY . .
RUN apk del --purge $buildDeps
ENTRYPOINT ["celery", "-A", "tasks", "worker", "-l", "info", "-B"]

当我将它部署到docker时,我得到了这个:

*********************************************************************************
Could not find function xmlCheckVersion in library libxml2. Is libxml2 installed?
*********************************************************************************
error: command 'gcc' failed with exit status 1
----------------------------------------
Rolling back uninstall of lxml

我虽然是因为'python-dev'和'python-lxml',然后我像这样编辑了dockfile:

WORKDIR $INSTALL_PATH
COPY requirements-docker.txt ./
RUN apt-get build-dev python-lxml
RUN pip install -r requirements.txt

它不起作用,我又得到了一个错误:

---> Running in 73201a0dcd59
/bin/sh: apt-get: not found

如何在docker中正确安装lxml？谢谢

Answer 1

我RUN apk add --update --no-cache g++ gcc libxslt-dev之前添加了RUN pip install -r requirements.txt它并且它有效.

Answer 2

接受的答案不整洁并安装了冗余包。减小图像大小的更好解决方案是：

RUN apk add --no-cache --virtual .build-deps gcc libc-dev libxslt-dev && \
    apk add --no-cache libxslt && \
    pip install --no-cache-dir lxml>=3.5.0 && \
    apk del .build-deps

结果图像大小将 < 163MB

Answer 3

由于我使用的是更简单的图像，因此我需要更多的库/应用程序。

这对我有用：

RUN apk add --update --no-cache g++ gcc libxml2-dev libxslt-dev python-dev libffi-dev openssl-dev make

RUN pip install -r requirements.txt

Answer 4

做如下

https://hub.docker.com/r/ryanfox1985/docker-couchpotato/builds/boinrrs9dbhnutwjxjw2l8m/

下载apk并安装

RUN wget http://nl.alpinelinux.org/alpine/edge/main/x86_64/py-lxml-3.4.0-r0.apk -O /var/cache/apk/py-lxml.apk RUN apk add --allow-untrusted /var/cache/apk/py-lxml.apk