Docker未能安装php mysql扩展

Question

我只是尝试获得一个简单的docker环境设置，但docker没有安装php的mysql扩展。我得到了对未定义函数mysql_connect()的致命错误调用。我尝试过不同的php版本(5.4、5.5、5.6、7.0)，结果都是一样的。任何帮助都将不胜感激。

docker-compose.yml

version: '2'
volumes:
    database_data:
        driver: local
services:
  nginx:
    image: nginx:latest
    ports:
      - 8080:80
    volumes:
      - ./docker/nginx/default.conf:/etc/nginx/conf.d/default.conf
    volumes_from:
      - php
  php:
    build: ./docker/php/
    expose:
      - 9000
    volumes:
      - .:/var/www/html
  testing:
    build: ./docker/php/
    volumes_from:
      - php
  mysql:
    image: mysql:latest
    expose:
      - 3306
    volumes:
      - database_data:/var/lib/mysql
    environment:
      MYSQL_ROOT_PASSWORD: secret
      MYSQL_DATABASE: project
      MYSQL_USER: project
      MYSQL_PASSWORD: project

Dockerfile

FROM php:7.0-fpm
# Install pdo_mysql
RUN apt-get update \
  && echo 'deb http://packages.dotdeb.org jessie all' >> /etc/apt/sources.list \
  && echo 'deb-src http://packages.dotdeb.org jessie all' >> /etc/apt/sources.list \
  && apt-get install -y wget \
  && wget https://www.dotdeb.org/dotdeb.gpg \
  && apt-key add dotdeb.gpg \
  && apt-get update \
  && apt-get install -y php7.0-mysql \
  && docker-php-ext-install pdo_mysql mysqli mysql

Answer 1

如果安装这个php扩展名工作(在dockerfile中)

docker-php-ext-install mysqli

容器内：

docker-php-ext-install mysqli
apache2ctl restart

Answer 2

我查看了WP Dockerfile，并使用了它们的php Dockerfile，它起了作用。

# install the PHP extensions we need
RUN apt-get update && apt-get install -y libpng12-dev libjpeg-dev && rm -rf /var/lib/apt/lists/* \
    && docker-php-ext-configure gd --with-png-dir=/usr --with-jpeg-dir=/usr \
    && docker-php-ext-install gd
RUN docker-php-ext-install mysqli