为什么我需要Docker for nodejs？
我对Docker相对来说比较新。 这真是太神奇了。
那么，我明白，像PHP这样的语言。 我认为使用Docker确实有意义，因为PHP环境。
但是，为什么我需要使用docker的Node.js，而我可以简单地'npm安装'和'npm开始'，我都完成了。
我想我在这里错过了一些东西。 我错过了什么？
值得注意的主要问题是所有的应用程序都依赖于机器构build。 简单的应用程序（在节点或PHP或任何其他）可以在控制台上启动，但他们仍然需要一个服务器和一个包pipe理器。
该列表可能包含以下任何一项：
- 基本服务器的select是为了平衡速度，图像大小，安全方式或更新谨慎性（Ubuntu的function，CentOS谨慎，Alpine的图像大小等）
- 运行时软件，如PHP，Apache，NginX，Node等
- 服务器写入权限设置在内部caching文件夹上
- 安装一个特定版本的cURL
- 本地caching或队列安装（Redis，Memcache等）
- 安装了特定的PHP扩展，如数据库扩展（或另一种语言的系统等效）
- 用户帐户
- 包装pipe理软件，如Composer和NPM
- 您的应用程序，从版本控制或生成服务器获取
- 为您的应用程序安装软件包
- 安装字体
- 设置时区和本地化
这里是我最近写的一个Dockerfile（用于一套相对简单的functiontesting）：
# Docker build script for the Command Agent system FROM ubuntu # Do a system update RUN apt-get update && apt-get install -y # Basic dependencies RUN apt-get install -y git openssl # Install PHP # Composer needs openssl, json, phar, iconv/mbstring # Composer recommends zlib # PHPUnit needs dom, mbstring RUN apt-get install -y php php-json php-phar php-mbstring php-dom php-zip # @todo What names are php-ssl and php-zlib under? # Install SSH server # Expect is to handle tty automation # Netcat is required to send messages RUN apt-get install -y openssh-server expect netcat RUN adduser --disabled-password --gecos "" nonpriv # It looks like passwordless access does not work unless the user has a password! RUN echo 'nonpriv:Password123' | chpasswd # We need to be able to ask for a root password (so lets give it one) RUN echo 'root:Password123' | chpasswd # Copy over installation scripts COPY install /tmp/install RUN chmod u+rx /tmp/install/_*.sh && \ chown -R nonpriv:nonpriv /tmp/install # Install Composer # See https://getcomposer.org/doc/faqs/how-to-install-composer-programmatically.md RUN cd /tmp && sh /tmp/install/composer.sh # Copy dependendencies COPY composer.json /root/command-agent/composer.json COPY composer.lock /root/command-agent/composer.lock # Install deps using Composer (include dev deps) # @todo Don't run composer as root, https://getcomposer.org/root RUN cd /root/command-agent && php /tmp/composer.phar install # Apply patch to PHPUnit. This is a bit hacky, but the only way I can see to # fully turn off output buffering. Unfortunately these methods are private, # so standard approaches to removing them (an override method) would not work. # The only other alternative is using runkit, and I think that might be +more+ # hacky :) COPY patch /root/command-agent/patch RUN patch -p1 \ /root/command-agent/vendor/phpunit/phpunit/src/Framework/TestCase.php \ /root/command-agent/patch/disable_ob.patch # Copy code COPY bin /root/command-agent/bin COPY src /root/command-agent/src COPY test /root/command-agent/test COPY entry-point.sh /root/command-agent/entry-point.sh COPY expect.sh /root/command-agent/expect.sh COPY phpunit.xml /root/command-agent/phpunit.xml RUN ln -s /root/command-agent/vendor/bin/phpunit /root/command-agent/phpunit # Allow non-priv user to read/exec root files RUN chown -R root:nonpriv /root && \ chmod -R gw /root && \ chmod -R g+rx /root # This should be privileged access only COPY test/functional/assets/agent_auth /root/.agent_auth COPY test/functional/assets/agent_auth_wrong /root/.agent_auth_wrong COPY test/functional/assets/bad_perms_agent_auth /root/.bad_perms_agent_auth RUN chmod 400 /root/.agent_auth* # Run tests ENTRYPOINT ["sh", "/root/command-agent/entry-point.sh"]
这是相当漫长的，当然我不想重复每一次重新部署。