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<p>根据User Story，应用至少包含用户管理、文件管理等微服务，每个微服务都行使不一样的功能。下面是分解后设计的微服务结构：</p>
<p><img alt="" src="microservices.png" /></p>
<p><strong>网关：</strong>负责进行请求转发、用户认证以及其他内容，比如解决跨站访问、设置HTTP安全消息头等。通过设置防火墙，所有的请求都必须经过网关，这样就将内部服务与外部用户隔离起来，防止内部服务被非法访问。</p>
<p><strong>文件管理：</strong>提供文件上传、删除等文件管理功能。</p>
<p><strong>用户管理：</strong>提供认证、角色和权限管理等功能。</p>
<p><strong>界面: </strong> 采用静态页面技术, html+js+css实现。界面可以作为一个单独的微服务，也可以直接放到网关服务里面。</p>
<p>为了可靠性，这些服务都应该支持分布式集群部署。因此在业务逻辑中涉及到并发和负载均衡的场景，都需要考虑无状态设计。可以给网关配置域名或者在上层再挂一个弹性负载均衡器，实现网关的多实例部署。</p>
<p>微服务设计好以后，可以通过已有项目快速搭建项目架子。可以从：</p>
<p><a href="https://github.com/apache/servicecomb-samples/tree/master/porter_lightweight">Porter应用</a> </p>
<p>下载该项目。</p>
<p>初始的项目是一个maven项目，主要内容包括pom.xml文件、microservice.yam文件和一个Main函数。microservice.yam文件配置了微服务的基本信息和访问服务中心的地址。</p>
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