定義Dockerfile,采用官方php鏡像安裝，下面安裝了拓展:
FROM php:5.6-fpm RUN apt-get update && apt-get install -y libfreetype6-dev libjpeg62-turbo-dev libmcrypt-dev libpng12-dev && docker-php-ext-install -j$(nproc) iconv mcrypt gd MySQLi mysql pdo pdo_mysql && docker-php-ext-configure gd --with-freetype-dir=/usr/include/ --with-jpeg-dir=/usr/include/ && docker-php-ext-enable mysql
docker-php-ext-install [-jN] ext-name [ext-name ...]
安裝模塊，docker-php-ext-install，如mysql模塊：’docker-php-ext-install mysql’
可能的模塊： bcmath bz2 calendar ctype curl dba dom enchant exif fileinfo filter ftp gd gettext gmp hash iconv imap interbase intl json ldap mbstring mcrypt mssql mysql mysqli oci8 odbc opcache pcntl pdo pdo_dblib pdo_firebird pdo_mysql pdo_oci pdo_odbc pdo_pgsql pdo_sqlite pgsql phar posix pspell readline recode reflection session shmop simplexml snmp soap sockets spl standard sybase_ct sysvmsg sysvsem sysvshm tidy tokenizer wddx xml xmlreader xmlrpc xmlwriter xsl zip
docker-php-ext-enable [options] module-name [module-name ...]
啟用模塊，docker-php-ext-enable，如’mysqli’模塊：’docker-php-ext-enable mysql’
可能的模塊： gd.so iconv.so mcrypt.so mysql.so mysqli.so opcache.so pdo.so pdo_mysql.so
docker-php-ext-configure ext-name [configure flags]
配置模塊,docker-php-ext-configure,如gd配置：docker-php-ext-configure gd --with-freetype-dir=/usr/include/ --with-jpeg-dir=/usr/include/
可能的值： bcmath bz2 calendar ctype curl dba dom enchant exif fileinfo filter ftp gd gettext gmp hash iconv imap interbase intl json ldap mbstring mcrypt mssql mysql mysqli oci8 odbc opcache pcntl pdo pdo_dblib pdo_firebird pdo_mysql pdo_oci pdo_odbc pdo_pgsql pdo_sqlite pgsql phar posix pspell readline recode reflection session shmop simplexml snmp soap sockets spl standard sybase_ct sysvmsg sysvsem sysvshm tidy tokenizer wddx xml xmlreader xmlrpc xmlwriter xsl zip
如果需要安裝外置拓展必須要用到pecl命令，如安裝redis:pecl install redis-3.1.0.
最后要啟用docker-php-ext-enable redis
定義docker-compose.yml:
php: build: ./php container_name: php56 expose: - 9000 volumes: - /data/wwwroot:/var/www/html/data/wwwroot restart: always external_links: - mysql
這樣在我們的php連接數據的host可以采用mysql去代替
