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二十三、Docker 部署 PHP 环境

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PHP 是当下最流行的 Web 服务器端开发语言,号称 地球上最好的语言,没有之一。Docker 部署 PHP 环境有两种方式: 通过 Dockerfile 构建 和 从 Docker 仓库拉取

我们以当前最新的版本 7.2.6 安装为例

1. 使用 docker pull php

这是最简单的方式,开箱即用

  1. 使用 docker search php 命令可以列出 docker.io 上所有的 PHP 有关的镜像

    [root@localhost ~]# docker search php
    NAME     DESCRIPTION                  OFFICIAL   
    php      While designed for web...     [OK]   
    ...

    有很多版本,我们选择官方的 php

  2. 拉取最新的 PHP 标签: 7.2.6-fpm-stretch

    [root@localhost ~]# docker pull php:7.2.6-fpm-stretch
  3. 稍等片刻,下载完成后,就可以在本地镜像列表里找到 REPOSITORY 为 php, 标签为 7.2.6-fpm-stretch 的镜像

    [root@localhost ~]# docker images php
    REPOSITORY TAG                IMAGE ID     ... SIZE
    php        7.2.6-fpm-stretch  0a757334c1f6 ... 367.7 MB

2. 通过 Dockerfile 文件构建

使用 Dockerfile 文件构建,我们可以实现定制,并且熟悉 PHP 的安装过程

  1. 创建目录 php,用于存放后面的相关东西

    [root@localhost ~]# mkdir -p php/logs php/conf
    文件 说明
    logs 该目录将映射为 phpops 容器的日志目录
    conf 该目录里的配置文件将映射为 phpops 容器的配置文件
  2. 进入 php 目录,并创建以下几个文件

    [root@localhost ~]# cd php

    如果你嫌复制太麻烦,可以直接去 GitHub 上下载

    1. docker-php-entrypoint

      # !/bin/sh
      # 移除第一行的 # ! 之间的空格
      set -e
      
      # first arg is -f or --some-option
      if [ "${1#-}" != "$1" ]; then
          set -- php-fpm "$@"
      fi
      
      exec "$@"
    2. docker-php-ext-configure

      # !/bin/sh
      # 移除第一行的 # ! 之间的空格
      set -e
      
      # prefer user supplied CFLAGS, but default to our PHP_CFLAGS
      : ${CFLAGS:=$PHP_CFLAGS}
      : ${CPPFLAGS:=$PHP_CPPFLAGS}
      : ${LDFLAGS:=$PHP_LDFLAGS}
      export CFLAGS CPPFLAGS LDFLAGS
      
      srcExists=
      if [ -d /usr/src/php ]; then
          srcExists=1
      fi
      docker-php-source extract
      if [ -z "$srcExists" ]; then
          touch /usr/src/php/.docker-delete-me
      fi
      
      cd /usr/src/php/ext
      
      usage() {
          echo "usage: $0 ext-name [configure flags]"
          echo "   ie: $0 gd --with-jpeg-dir=/usr/local/something"
          echo
          echo 'Possible values for ext-name:'
          find . 
                  -mindepth 2 
                  -maxdepth 2 
                  -type f 
                  -name 'config.m4' 
              | xargs -n1 dirname 
              | xargs -n1 basename 
              | sort 
              | xargs
          echo
          echo 'Some of the above modules are already compiled into PHP; please check'
          echo 'the output of "php -i" to see which modules are already loaded.'
      }
      
      ext="$1"
      if [ -z "$ext" ] || [ ! -d "$ext" ]; then
          usage >&2
          exit 1
      fi
      shift
      
      pm='unknown'
      if [ -e /lib/apk/db/installed ]; then
          pm='apk'
      fi
      
      if [ "$pm" = 'apk' ]; then
          if 
              [ -n "$PHPIZE_DEPS" ] 
              && ! apk info --installed .phpize-deps > /dev/null 
              && ! apk info --installed .phpize-deps-configure > /dev/null 
          ; then
              apk add --no-cache --virtual .phpize-deps-configure $PHPIZE_DEPS
          fi
      fi
      
      if command -v dpkg-architecture > /dev/null; then
          gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)"
          set -- --build="$gnuArch" "$@"
      fi
      
      cd "$ext"
      phpize
      ./configure "$@"
    3. docker-php-ext-enable

      # !/bin/sh
      # 移除第一行的 # ! 之间的空格
      set -e
      
      extDir="$(php -r 'echo ini_get("extension_dir");')"
      cd "$extDir"
      
      usage() {
          echo "usage: $0 [options] module-name [module-name ...]"
          echo "   ie: $0 gd mysqli"
          echo "       $0 pdo pdo_mysql"
          echo "       $0 --ini-name 0-apc.ini apcu apc"
          echo
          echo 'Possible values for module-name:'
          find -maxdepth 1 
                  -type f 
                  -name '*.so' 
                  -exec basename '{}' ';' 
              | sort 
              | xargs
          echo
          echo 'Some of the above modules are already compiled into PHP; please check'
          echo 'the output of "php -i" to see which modules are already loaded.'
      }
      
      opts="$(getopt -o 'h?' --long 'help,ini-name:' -- "$@" || { usage >&2 && false; })"
      eval set -- "$opts"
      
      iniName=
      while true; do
          flag="$1"
          shift
          case "$flag" in
              --help|-h|'-?') usage && exit 0 ;;
              --ini-name) iniName="$1" && shift ;;
              --) break ;;
              *)
                  {
                      echo "error: unknown flag: $flag"
                      usage
                  } >&2
                  exit 1
                  ;;
          esac
      done
      
      modules=
      for module; do
          if [ -z "$module" ]; then
              continue
          fi
          if [ -f "$module.so" ] && ! [ -f "$module" ]; then
              # allow ".so" to be optional
              module="$module.so"
          fi
          if ! [ -f "$module" ]; then
              echo >&2 "error: '$module' does not exist"
              echo >&2
              usage >&2
              exit 1
          fi
          modules="$modules $module"
      done
      
      if [ -z "$modules" ]; then
          usage >&2
          exit 1
      fi
      
      pm='unknown'
      if [ -e /lib/apk/db/installed ]; then
          pm='apk'
      fi
      
      apkDel=
      if [ "$pm" = 'apk' ]; then
          if 
              [ -n "$PHPIZE_DEPS" ] 
              && ! apk info --installed .phpize-deps > /dev/null 
              && ! apk info --installed .phpize-deps-configure > /dev/null 
          ; then
              apk add --no-cache --virtual '.docker-php-ext-enable-deps' binutils
              apkDel='.docker-php-ext-enable-deps'
          fi
      fi
      
      for module in $modules; do
          if readelf --wide --syms "$module" | grep -q ' zend_extension_entry$'; then
              # https://wiki.php.net/internals/extensions#loading_zend_extensions
              absModule="$(readlink -f "$module")"
              line="zend_extension=$absModule"
          else
              line="extension=$module"
          fi
      
          ext="$(basename "$module")"
          ext="${ext%.*}"
          if php -r 'exit(extension_loaded("'"$ext"'") ? 0 : 1);'; then
              # this isn't perfect, but it's better than nothing
              # (for example, 'opcache.so' presents inside PHP as 'Zend OPcache', not 'opcache')
              echo >&2
              echo >&2 "warning: $ext ($module) is already loaded!"
              echo >&2
              continue
          fi
      
          ini="/usr/local/etc/php/conf.d/${iniName:-"docker-php-ext-$ext.ini"}"
          if ! grep -q "$line" "$ini" 2>/dev/null; then
              echo "$line" >> "$ini"
          fi
      done
      
      if [ "$pm" = 'apk' ] && [ -n "$apkDel" ]; then
          apk del $apkDel
      fi
    4. docker-php-ext-install

      # !/bin/sh
      # 移除第一行的 # ! 之间的空格
      set -e
      
      # prefer user supplied CFLAGS, but default to our PHP_CFLAGS
      : ${CFLAGS:=$PHP_CFLAGS}
      : ${CPPFLAGS:=$PHP_CPPFLAGS}
      : ${LDFLAGS:=$PHP_LDFLAGS}
      export CFLAGS CPPFLAGS LDFLAGS
      
      srcExists=
      if [ -d /usr/src/php ]; then
          srcExists=1
      fi
      docker-php-source extract
      if [ -z "$srcExists" ]; then
          touch /usr/src/php/.docker-delete-me
      fi
      
      cd /usr/src/php/ext
      
      usage() {
          echo "usage: $0 [-jN] ext-name [ext-name ...]"
          echo "   ie: $0 gd mysqli"
          echo "       $0 pdo pdo_mysql"
          echo "       $0 -j5 gd mbstring mysqli pdo pdo_mysql shmop"
          echo
          echo 'if custom ./configure arguments are necessary, see docker-php-ext-configure'
          echo
          echo 'Possible values for ext-name:'
          find . 
                  -mindepth 2 
                  -maxdepth 2 
                  -type f 
                  -name 'config.m4' 
              | xargs -n1 dirname 
              | xargs -n1 basename 
              | sort 
              | xargs
          echo
          echo 'Some of the above modules are already compiled into PHP; please check'
          echo 'the output of "php -i" to see which modules are already loaded.'
      }
      
      opts="$(getopt -o 'h?j:' --long 'help,jobs:' -- "$@" || { usage >&2 && false; })"
      eval set -- "$opts"
      
      j=1
      while true; do
          flag="$1"
          shift
          case "$flag" in
              --help|-h|'-?') usage && exit 0 ;;
              --jobs|-j) j="$1" && shift ;;
              --) break ;;
              *)
                  {
                      echo "error: unknown flag: $flag"
                      usage
                  } >&2
                  exit 1
                  ;;
          esac
      done
      
      exts=
      for ext; do
          if [ -z "$ext" ]; then
              continue
          fi
          if [ ! -d "$ext" ]; then
              echo >&2 "error: $PWD/$ext does not exist"
              echo >&2
              usage >&2
              exit 1
          fi
          exts="$exts $ext"
      done
      
      if [ -z "$exts" ]; then
          usage >&2
          exit 1
      fi
      
      pm='unknown'
      if [ -e /lib/apk/db/installed ]; then
          pm='apk'
      fi
      
      apkDel=
      if [ "$pm" = 'apk' ]; then
          if [ -n "$PHPIZE_DEPS" ]; then
              if apk info --installed .phpize-deps-configure > /dev/null; then
                  apkDel='.phpize-deps-configure'
              elif ! apk info --installed .phpize-deps > /dev/null; then
                  apk add --no-cache --virtual .phpize-deps $PHPIZE_DEPS
                  apkDel='.phpize-deps'
              fi
          fi
      fi
      
      popDir="$PWD"
      for ext in $exts; do
          cd "$ext"
          [ -e Makefile ] || docker-php-ext-configure "$ext"
          make -j"$j"
          make -j"$j" install
          find modules 
              -maxdepth 1 
              -name '*.so' 
              -exec basename '{}' ';' 
                  | xargs -r docker-php-ext-enable
          make -j"$j" clean
          cd "$popDir"
      done
      
      if [ "$pm" = 'apk' ] && [ -n "$apkDel" ]; then
          apk del $apkDel
      fi
      
      if [ -e /usr/src/php/.docker-delete-me ]; then
          docker-php-source delete
      fi
    5. docker-php-source

      # !/bin/sh
      # 移除第一行的 # ! 之间的空格
      set -e
      
      dir=/usr/src/php
      
      usage() {
          echo "usage: $0 COMMAND"
          echo
          echo "Manage php source tarball lifecycle."
          echo
          echo "Commands:"
          echo "   extract  extract php source tarball into directory $dir if not already done."
          echo "   delete   delete extracted php source located into $dir if not already done."
          echo
      }
      
      case "$1" in
          extract)
              mkdir -p "$dir"
              if [ ! -f "$dir/.docker-extracted" ]; then
                  tar -Jxf /usr/src/php.tar.xz -C "$dir" --strip-components=1
                  touch "$dir/.docker-extracted"
              fi
              ;;
      
          delete)
              rm -rf "$dir"
              ;;
      
          *)
              usage
              exit 1
              ;;
      esac
  3. 创建 Dockerfile 文件

    [root@localhost php]# vi Dockerfile

    然后复制以下内容

    FROM debian:jessie
    
    # 编译和运行时依赖的工具
    ENV PHPIZE_DEPS autoconf file g++ gcc libc-dev make pkg-config re2c
    # 指定 php.ini目录
    ENV PHP_INI_DIR /usr/local/etc/php
    
    ## 指定 PHP 版本和编译的选项
    ENV PHP_EXTRA_CONFIGURE_ARGS --enable-fpm --with-fpm-user=www-data --with-fpm-group=www-data
    ENV PHP_VERSION 7.2.6
    ENV PHP_FILENAME php-7.2.6.tar.xz
    
    # 安装依赖的库和环境
    RUN apt-get update 
        && apt-get install -y $PHPIZE_DEPS ca-certificates curl libedit2 
        libsqlite3-0 libxml2 --no-install-recommends 
        && rm -r /var/lib/apt/lists/*
    
    RUN mkdir -p $PHP_INI_DIR/conf.d
    
    RUN set -xe && buildDeps=" $PHP_EXTRA_BUILD_DEPS libcurl4-openssl-dev libedit-dev libsqlite3-dev libssl-dev libxml2-dev xz-utils " 
        && apt-get update && apt-get install -y $buildDeps --no-install-recommends && rm -rf /var/lib/apt/lists/* 
        && curl -fSL "http://php.net/get/$PHP_FILENAME/from/this/mirror" -o "$PHP_FILENAME" 
        && mkdir -p /usr/src/php 
        && tar -xf "$PHP_FILENAME" -C /usr/src/php --strip-components=1 
        && rm "$PHP_FILENAME" 
        && cd /usr/src/php 
        && ./configure --with-config-file-path="$PHP_INI_DIR" 
            --with-config-file-scan-dir="$PHP_INI_DIR/conf.d" 
            $PHP_EXTRA_CONFIGURE_ARGS 
            --disable-cgi --enable-mysqlnd --enable-mbstring 
            --with-curl --with-libedit --with-openssl --with-zlib 
        && make -j"$(nproc)" 
        && make install 
        && { find /usr/local/bin /usr/local/sbin -type f -executable -exec strip --strip-all '{}' + || true; } 
        && make clean 
        && apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false -o APT::AutoRemove::SuggestsImportant=false $buildDeps
    
    COPY docker-php-ext-* /usr/local/bin/
    
    ##<autogenerated>##
    WORKDIR /var/www/html
    
    RUN set -ex 
        && cd /usr/local/etc 
        && if [ -d php-fpm.d ]; then 
            sed 's!=NONE/!=!g' php-fpm.conf.default | tee php-fpm.conf > /dev/null; 
            cp php-fpm.d/www.conf.default php-fpm.d/www.conf; 
        else 
            mkdir php-fpm.d; 
            cp php-fpm.conf.default php-fpm.d/www.conf; 
            { 
                echo '[global]'; 
                echo 'include=etc/php-fpm.d/*.conf'; 
            } | tee php-fpm.conf; 
        fi 
        && { 
            echo '[global]'; 
            echo 'error_log = /proc/self/fd/2'; 
            echo; 
            echo '[www]'; 
            echo '; if we send this to /proc/self/fd/1, it never appears'; 
            echo 'access.log = /proc/self/fd/2'; 
            echo; 
            echo 'clear_env = no'; 
            echo; 
            echo '; Ensure worker stdout and stderr are sent to the main error log.'; 
            echo 'catch_workers_output = yes'; 
        } | tee php-fpm.d/docker.conf 
        && { 
            echo '[global]'; 
            echo 'daemonize = no'; 
            echo; 
            echo '[www]'; 
            echo 'listen = [::]:9000'; 
        } | tee php-fpm.d/zz-docker.conf
    
    EXPOSE 9000
    CMD ["php-fpm"]
  4. 通过 docker build 命令创建镜像 my-php:7.2.6-fpm

    [root@localhost php]# docker build -t my-php:7.2.6-fpm .
  5. 稍等片刻,命令执行完成后,可以使用 docker images 命令显示刚刚创建的镜像

    [root@localhost php]# docker images my-php
    REPOSITORY   TAG                 IMAGE ID        ...  SIZE

运行 my-php 容器

先在当前目录下创建目录 www,然后在目录 www 中新建文件 i.php 内容如下

<?php 
phpinfo();

最后使用下面的命令运行容器

[root@localhost php]# docker run -it -p 9000:9000 --name  php-fpm -v $pwd/www:/www -v $PWD/conf:/usr/local/etc/php -v $PWD/logs:/phplogs my-php:7.2.6-fpm bash

这会直接进入容器

参数说明

  1. -p 9000:9000

    将容器的 9000 端口映射到主机的 9000 端口

  2. --name php-fpm

    将容器命名为 php-fpm

  3. -v $pwd/www:/www

    将主机中项目的目录 www 挂载到容器的 /www

  4. -v $PWD/conf:/usr/local/etc/php

    将主机中当前目录下的 conf 目录挂载到容器的 /usr/local/etc/php

  5. -v $PWD/logs:/phplogs

    将主机中当前目录下的 logs 目录挂载到容器的 /phplogs

然后使用下面的命令 CD 到 /www 目录,运行 php -s 0.0.0.0:9000 命令

root@bd90d7c7bbf9:/www# cd /www
root@bd90d7c7bbf9:/www# php -S 0.0.0.0:9000

通过浏览器访问 http://localhost:9000/i.php,输出如下

20201207122408566.png

如果要作为 php-fpm 运行,那么直接使用下面的命令

[root@localhost php]# docker run -d -p 9000:9000 --name  php-fpm -v $pwd/www:/www -v $PWD/conf:/usr/local/etc/php -v $PWD/logs:/phplogs my-php:7.2.6-fpm

查看容器启动情况

[root@localhost php]# docker ps -a
CONTAINER ID    IMAGE         COMMAND      ...    PORTS                    NAMES
00c5aa4c2f93    my-php:7.2.6-fpm   "php-fpm"    ...    0.0.0.0:9000->9000/tcp   myphp-fpm

查看容器的 IP

可以使用命令 docker inspect 查看容器的 IP

docker inspect --format '{{ .NetworkSettings.IPAddress }}' <container_id>

例如可以使用下面的命令查看刚刚创建的容器的 IP

[root@localhost php]# docker inspect --format '{{ .NetworkSettings.IPAddress }}' c929419b17cf
172.17.0.2

使用 Nginx + PHP 实现 Web 服务

我们是通过 Nginx + PHP 实现 Web 服务,Nginx 配置文件的 fastcgi_pass 应该配置为 myphp-fpm 容器的 IP

fastcgi_pass  172.17.0.2:9000;
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