docker - 如何在Docker中公开从主机到容器的端口？

Question

您可以使用 EXPOSE在 Docker 中:

The EXPOSE instructions informs Docker that the container will listen on the specified network ports at runtime.

我可以做相反的事情吗？我可以将端口从我的 Ubuntu 公开到 docker 容器吗？

背景:我正在尝试将一个简单的 php7-fpm 设置为 docker 镜像，并且我想将端口 3306(MySQL 服务)暴露给 docker 容器。

我的 Dockerfile :

FROM debian:jessie

# persistent / runtime deps
RUN apt-get update && apt-get install -y ca-certificates curl libpcre3 librecode0 libsqlite3-0 libxml2 --no-install-recommends && rm -r /var/lib/apt/lists/*

# phpize deps
RUN apt-get update && apt-get install -y autoconf file g++ gcc libc-dev make pkg-config re2c --no-install-recommends && rm -r /var/lib/apt/lists/*

ENV PHP_INI_DIR /usr/local/etc/php
RUN mkdir -p $PHP_INI_DIR/conf.d

##<autogenerated>##
ENV PHP_EXTRA_CONFIGURE_ARGS --enable-fpm --with-fpm-user=www-data --with-fpm-group=www-data
##</autogenerated>##

ENV PHP_VERSION 7.0.0RC2

# --enable-mysqlnd is included below because it's harder to compile after the fact the extensions are (since it's a plugin for several extensions, not an extension in itself)
RUN buildDeps=" \
        $PHP_EXTRA_BUILD_DEPS \
        libcurl4-openssl-dev \
        libpcre3-dev \
        libreadline6-dev \
        librecode-dev \
        libsqlite3-dev \
        libssl-dev \
        libxml2-dev \
        xz-utils \
    " \
    && set -x \
    && apt-get update && apt-get install -y $buildDeps --no-install-recommends && rm -rf /var/lib/apt/lists/* \
    && curl -SL "https://downloads.php.net/~ab/php-$PHP_VERSION.tar.xz" -o php.tar.xz \
    && mkdir -p /usr/src/php \
    && tar -xof php.tar.xz -C /usr/src/php --strip-components=1 \
    && rm php.tar.xz* \
    && cd /usr/src/php \
    && ./configure \
        --with-config-file-path="$PHP_INI_DIR" \
        --with-config-file-scan-dir="$PHP_INI_DIR/conf.d" \
        $PHP_EXTRA_CONFIGURE_ARGS \
        --disable-cgi \
        --enable-mysqlnd \
        --with-pdo-mysql \
        --enable-mbstring \
        --with-curl \       
        --with-openssl \
        --with-pcre \
        --with-readline \
        --with-recode \
        --with-zlib \
    && make -j"$(nproc)" \
    && make install \
    && { find /usr/local/bin /usr/local/sbin -type f -executable -exec strip --strip-all '{}' + || true; } \
    && apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false -o APT::AutoRemove::SuggestsImportant=false $buildDeps \
    && make clean

COPY docker-php-ext-* /usr/local/bin/

##<autogenerated>##
WORKDIR /var/www/html
COPY php-fpm.conf /usr/local/etc/

EXPOSE 9000
CMD ["php-fpm"]
##</autogenerated>## 

这是我用来运行容器的命令:

docker run --name=php7-fpm -v /var/www/html/:/var/www/html/ -p 9002:9000 marty/php7

我的 PHP 应用程序数据库配置:

database:
    main:
        host: 127.0.0.1
        dbname: edu
        user: root
        password: myPassword
        port: 3306

Answer 1

您可以使用 --net=host 运行容器然后它将可以直接访问主机的端口。见 https://docs.docker.com/engine/reference/run/#network-settings