{"componentChunkName":"component---src-templates-blog-detail-tsx","path":"/blog/2020-07-17-serverlessdays-didi","result":{"data":{"currentBlog":{"id":"ecc61b91-6065-5cfc-94d1-15294badadb0","frontmatter":{"thumbnail":"https://img.serverlesscloud.cn/2020720/1595231990326-1594107290027-%E6%BB%B4%E6%BB%B4.jpg","authors":["张健/陈钦辉"],"categories":["news"],"date":"2020-07-17T00:00:00.000Z","title":"从零到一，Serverless 平台在滴滴内部落地","description":"本文整理自 ServerlessDay · China 大会，讲师为滴滴弹性云平台负责人张健、滴滴资深前端开发工程师陈钦辉。滴滴 Serverless FT 成员来自：滴滴基础平台部、车服技术部、金融事业部、普惠产品技术部。","authorslink":null,"translators":null,"translatorslink":null,"tags":["ServerlessDays","Meetup"],"keywords":"Serverless, ServerlessDays, Serverless实践","outdated":null},"wordCount":{"words":365,"sentences":79,"paragraphs":79},"fileAbsolutePath":"/opt/build/repo/content/blog/2020-07-17-serverlessdays-didi.md","fields":{"slug":"/blog/2020-07-17-serverlessdays-didi/","keywords":["faas","koa","nodejs","serverless","webpack","云函数","Serverless","serverlesscloud"]},"html":"
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本文整理自 ServerlessDay · China 大会 - 《从零到一，Serverless 平台在滴滴内部落地》分享，讲师滴滴弹性云平台负责人张健、滴滴资深前端开发工程师陈钦辉。滴滴 Serverless FT成员来自：滴滴基础平台部、车服技术部、金融事业部、普惠产品技术部。

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为什么（前端）要推动建设 Serverless

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我们的方案

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我们调研了业界的 Serverless 方案，最终决定了自己的方案： K8s + Knative + Istio 搭建应用级 Serverless。他的优势是：

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通过 Serverless 升级研发模式

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那有了 Severless 基础能力，如何通过他来升级我们的研发模式呢？

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Serverless 全局图 - 研发视角

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从研发视角看下，整个 Serverless的全局，自上而下是：

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右侧： 是业务服务环境，下面是常规的日志、监控、报警、性能分析的能力

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左下侧：是Nodejs生态体系，包括业务框架、SDK、Nodejs性能分析平台

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左上侧：是面向Serverless 研发体系的共享市场

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在虚线框里，就是面向一个业务场景，基于 Serverless 能力打造的一个通用解决方案。

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Serverless 流程图 - 研发视角

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将上面 Serverless 全局图拆分，我们把它分成三部分，这三部分也是我们年初立项，多个团队合作做这件事的一个模块分工，分为底层、平台层，和面向业务的研发层。

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在开发者使用过程中，他们的流程是这样的：

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Serverless-cli 的定位

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我们再来看下 Serverless-cli, 它的定位是，基于插件式命令行扩展框架。他包含如下3个核心能力：

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\"Serverless\"

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serverless-cli 的设计

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cli 设计包含核心模块、默认命令、webpack相关、配置规范、以及基于cli 框架上层打造的插件生态。

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\"Serverless\"

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场景方案

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场景方案 - FaaS（云函数）

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第一个场景方案：云函数。\n函数即服务，用户快速编写一个函数接口，这里创建了两个接口, 每个接口暴露一个函数，入参为param 和 context, 通过 async 返回函数同步异步结果。这个场景的插件为 @didi/sls-cli-plugin-faas, 用户通过 package.json 中声明依赖即可。 FaaS工程类型的优势，是简单高效，并且通过Serverless 路由可以灵活控制隔离粒度。

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\"Serverless\"

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\"Serverless\"

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场景方案 - Sma（微应用）

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第二个场景方案：微应用。\n页面即服务，前后端代码一体化，service.js 里保留出两个接口 list 和 add， 此时可以在前端组件中，类似远程调用，直接调用这两个方法，如同本地函数一样。另外它的服务端代码上下文和 FaaS 保持一致。

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\"Serverless\"

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场景方案 - Sma-light（微应用-轻量版）

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因为是应用级Severless方案，服务部署过程还是需要经历构建代码、编译镜像、以及整个应用级的部署。故我们基于Runtime的设计，结合Nodejs热更新能力，来支持页面级发布能力，轻量微应用类型工程。它支持

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\"Severless\"

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不同场景方案，一致开发体验

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我们来感受下，不同场景下一致的开发体验，包括创建、构建、开发、部署等\n执行dev 时会一件启动前端资源webpack服务，同时启动服务端runtime服务，打开导航页面。

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另外部署，可以执行 sls deploy, 通过 cli 将服务、按场景先后，按流量分组部署到 Severless 平台。\n也可以通过 Vscode 插件可视化方式进行操作，进行部署、回滚。

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\"Severless\"

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\"Severless\"

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云端开发

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更进一步，我们提供了云端开发能力，来满足一些如云函数，这类轻量创建服务的方式，开发者可以通过平台创建函数、页面，完成开发、调试，上线，且它的开发体验与本地是完全环境一致，并且是复用的。

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\"Severless\"

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基于 Serverless 面向业务聚合

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我们来看一个业务使用案例。\n这是我们普惠的工作台，是一个面向运营，集合了多个业务线后台系统。这里的菜单栏是配置集成起来的，每个菜单项是一个独立的页面，目前我们还没有采用微前端的一些轻量的隔离方案，使用的是简单、有效的iframe来进行隔离的。每个页面即服务，由每个业务线团队里的每个同学，用他们熟悉的技术栈，通过的前面介绍的微应用解决方案，独立运维。

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\"Serverless\"

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最后

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最后，我们也在积极探索用 V8 Isolate 与我们现有应用级Serverless + Runtime设计结合，实现面向nodejs更轻量高效的Serverless 隔离方案。

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传送门：

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欢迎访问：Serverless 中文网，您可以在 最佳实践 里体验更多关于 Serverless 应用的开发！

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