求助: PHP 安装 gd 库相关扩展遇到的问题(docker)

当前所使用的用于构建镜像的 Dockerfile

FROM php:7.1-fpm

MAINTAINER Lestat Lee <lestat@lestat.me>

#更新 apt-get 源 使用 163 的源,同时备份现有 sources.list
RUN mv /etc/apt/sources.list /etc/apt/sources.list.bak && \
        echo "deb http://mirrors.163.com/debian/ jessie main non-free contrib" >/etc/apt/sources.list && \
        echo "deb http://mirrors.163.com/debian/ jessie-proposed-updates main non-free contrib" >>/etc/apt/sources.list && \
        echo "deb-src http://mirrors.163.com/debian/ jessie main non-free contrib" >>/etc/apt/sources.list && \
        echo "deb-src http://mirrors.163.com/debian/ jessie-proposed-updates main non-free contrib" >>/etc/apt/sources.list


RUN apt-get update \
    && apt-get install -y \
    git \
    zlib1g-dev \
    libjpeg-dev \
    libpng-dev \
&& curl -sS https://getcomposer.org/installer \
        | php -- --install-dir=/usr/local/bin --filename=composer \
&& composer config -g repo.packagist composer https://packagist.phpcomposer.com \
    && composer global require hirak/prestissimo


#安装 gd 库
RUN docker-php-ext-install -j$(nproc) iconv
    #&& docker-php-ext-configure gd --with-freetype-dir=/usr/include/ --with-jpeg-dir=/usr/include/ \
    #&& docker-php-ext-install -j$(nproc) gd

#安装 redis 扩展
RUN pecl install redis-4.0.1 \
    && pecl install xdebug-2.6.0 \
    && docker-php-ext-enable redis xdebug

EXPOSE 9000

问题描述

如果直接在上述 Dockerfile 目录执行docker build .,则会出现和下面一样的错误提示(下面的错误提示是我在没有安装 gd 扩展以及相关依赖的情况下构建镜像后进入到镜像内执行安装命令的提示),php7.1-fpm 默认系统是Debian GNU/Linux 9

root@78e2aff8c028:/var/www/html# apt-get install -y zlib1g-dev libpng-dev && docker-php-ext-install gd
Reading package lists... Done
Building dependency tree
Reading state information... Done
Note, selecting 'libpng12-dev' instead of 'libpng-dev'
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 zlib1g-dev : Depends: zlib1g (= 1:1.2.8.dfsg-2+b1) but 1:1.2.8.dfsg-5 is to be installed
E: Unable to correct problems, you have held broken packages.

在 google 上也找了很久,都说指定zlib1g的版本后可以解决这个问题,但是我在指定zlib1g版本后依然出现以下的提示

root@78e2aff8c028:/var/www/html# apt-get install -y zlib1g-dev=1:1.2.8.dfsg-2+b1 libpng-dev && docker-php-ext-install gd
Reading package lists... Done
Building dependency tree
Reading state information... Done
Note, selecting 'libpng12-dev' instead of 'libpng-dev'
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 zlib1g-dev : Depends: zlib1g (= 1:1.2.8.dfsg-2+b1) but 1:1.2.8.dfsg-5 is to be installed
E: Unable to correct problems, you have held broken packages.

我在 php7.0-fpm 镜像的 gd 库安装过程中也遇到同样的问题除此之外其他扩展安装都很顺利,想请教一下各位这可能是什么原因造成的呢?