本文介绍如何将Egg.js应用部署到函数计算。与传统的部署方法相比，您可以跳过购买机器等步骤，将传统的Egg.js应用一键部署至远端直接用于生产，并且拥有弹性伸缩、按量付费和免运维等特性。

前提条件

您已完成以下操作：

背景信息

Egg.js为企业级框架和应用而生，为开发人员提供了Web开发的核心功能和一套具有高扩展性的插件机制。开发人员按照统一的约定开发应用，从而降低开发和维护成本。关于Egg.js的更多信息，请参见Egg.js。

操作步骤

在目标目录中执行以下命令，初始化项目。

s init devsapp/start-egg -d start-egg

-d用于指定项名称，本示例以项目名称start-egg为例，介绍如何将Egg.js迁移到函数计算。

说明若已存在该项目则跳过此步骤。

输出示例：

 Serverless Awesome: https://github.com/Serverless-Devs/package-awesome

 devsapp!start-egg@0.1.11.zip file decompression completed
 Do you want to install dependencies? No
 please select credential alias default

     _____
    |  ___|
    | |__  __ _  __ _
    |  __|/ _` |/ _` |
    | |__| (_| | (_| |
    \____/\__, |\__, |
           __/ | __/ |
          |___/ |___/


    Welcome to the start-egg application
     This application requires to open these services:
         FC : https://fc.console.aliyun.com/
         ACR: https://cr.console.aliyun.com/
     This application can help you quickly deploy the Egg project:
         Full yaml configuration: https://github.com/devsapp/egg#%E5%AE%8C%E6%95%B4yaml
         Egg.js development docs: https://start-egg.org/zh-cn/tutorials/index.html
     This application homepage: https://github.com/devsapp/start-egg


‍ Thanks for using Serverless-Devs
 You could [cd /test/start-egg] and enjoy your serverless journey!
️ If you need help for this example, you can use [s -h] after you enter folder.
 Document Star：https://github.com/Serverless-Devs/Serverless-Devs

执行以下命令，进入项目目录：
```
cd start-egg
```

执行以下命令部署项目：

s deploy

输出示例：

[2021-08-17T14:31:03.383] [INFO ] [S-CLI] - Start ...
[2021-08-17T14:31:03.392] [INFO ] [S-CLI] - Start the pre-action
[2021-08-17T14:31:03.392] [INFO ] [S-CLI] - Action: npm install --production
npm WARN deprecated babel-eslint@8.2.6: babel-eslint is now @babel/eslint-parser. This package will no longer receive updates.
npm WARN deprecated debug@3.2.6: Debug versions >=3.2.0 <3.2.7 || >=4 <4.3.1 have a low-severity ReDos regression when used in a Node.js environment. It is recommended you upgrade to 3.2.7 or 4.3.1. (https://github.com/visionmedia/debug/issues/797)
npm WARN deprecated mkdirp@0.5.4: Legacy versions of mkdirp are no longer supported. Please update to mkdirp 1.x. (Note that the API surface has changed to use Promises in 1.x.)
npm WARN deprecated core-js@2.6.12: core-js@<3.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Please, upgrade your dependencies to the actual version of core-js.
npm WARN deprecated resolve-url@0.2.1: https://github.com/lydell/resolve-url#deprecated
npm WARN deprecated urix@0.1.0: Please see https://github.com/lydell/urix#deprecated
[            ......] - extract:component-emitter: sill extract component-emitter@^1.2.1 extracted to /test/start-egg/node_modules/.staging/component-emitter-009e97c5 (1358ms)
[            ......] - extract:component-emitter: sill extract component-emitter@^1.2.1 extracted to /test/start-egg/node_modules/.staging/component-emitter-009e97c5 (1358ms)
npm notice created a lockfile as package-lock.json. You should commit this file.
npm WARN co-mocha@1.2.2 requires a peer of mocha@>=1.18 <6 but none is installed. You must install peer dependencies yourself.
npm WARN acorn-jsx@5.3.2 requires a peer of acorn@^6.0.0 || ^7.0.0 || ^8.0.0 but none is installed. You must install peer dependencies yourself.

added 552 packages from 387 contributors in 50.881s

14 packages are looking for funding
  run `npm fund` for details

[2021-08-17T14:31:55.200] [INFO ] [S-CLI] - End the pre-action
 devsapp!egg@0.1.7.zip file decompression completed
 Using web framework type: nas, If you want to deploy with container, you can [s cli fc-default set web-framework container] to switch.
[2021-08-17T14:32:10.242] [WARN ] [EGG] - The startup file is not found, create a [start.sh] as the startup file.
 core-0.0.146.tgz file decompression completed
 Using web framework type: nas, If you want to deploy with container, you can [s cli fc-default set web-framework container] to switch.
 End of request
 Deployed.
 End of request
(node:18629) [DEP0005] DeprecationWarning: Buffer() is deprecated due to security and usability issues. Please use the Buffer.alloc(), Buffer.allocUnsafe(), or Buffer.from() methods instead.
(Use `node --trace-deprecation ...` to show where the warning was created)
[2021-08-17T14:32:22.474] [INFO ] [FC-DEPLOY] - Using region: cn-shenzhen
[2021-08-17T14:32:22.474] [INFO ] [FC-DEPLOY] - Using access alias: default
[2021-08-17T14:32:22.475] [INFO ] [FC-DEPLOY] - Using accessKeyID: 188077086902****
[2021-08-17T14:32:22.475] [INFO ] [FC-DEPLOY] - Using accessKeySecret: ldHUiJLoGto****
 Using fc deploy type: sdk, If you want to deploy with pulumi, you can [s cli fc-default set deploy-type pulumi] to switch.
[2021-08-17T14:32:23.193] [INFO ] [FC-DEPLOY] - Checking Service serverless-devs-egg exists
[2021-08-17T14:32:23.637] [INFO ] [FC-DEPLOY] - Setting role: fcDeployDefaultRole-serverless-devs-egg
[2021-08-17T14:32:24.423] [INFO ] [RAM] - Checking Role fcDeployDefaultRole-serverless-devs-egg exists
[2021-08-17T14:32:24.585] [INFO ] [RAM] - Creating role: fcDeployDefaultRole-serverless-devs-egg
[2021-08-17T14:32:24.685] [INFO ] [RAM] - Checking Plicy AliyunECSNetworkInterfaceManagementAccess exists
[2021-08-17T14:32:24.755] [INFO ] [RAM] - Checking Plicy AliyunContainerRegistryReadOnlyAccess exists
[2021-08-17T14:32:25.056] [INFO ] [FC-DEPLOY] - Using vpcConfig: auto: fc will try to generate related vpc resources automatically
[2021-08-17T14:32:26.375] [INFO ] [VPC] - Getting vpc: fc-deploy-component-generated-vpc-cn-shenzhen
[2021-08-17T14:32:26.477] [INFO ] [VPC] - Getting vswitch: fc-deploy-component-generated-vswitch-cn-shenzhen
[2021-08-17T14:32:26.636] [INFO ] [VPC] - Getting securityGroup: fc-deploy-component-generated-securityGroup-cn-shenzhen
[2021-08-17T14:32:26.842] [INFO ] [FC-DEPLOY] - Generated vpcConfig:
securityGroupId: sg-wz92ctigpi221smc****
vSwitchId: vsw-wz9qnuult4q5g4f7n****
vpcId: vpc-wz9x9bzs0wtvjgt6n****

[2021-08-17T14:32:26.843] [INFO ] [FC-DEPLOY] - Using nasConfig: auto: fc will try to generate related nas file system automatically
 upload done
[2021-08-17T14:32:53.524] [INFO ] [FC-DEPLOY] - Generated nasConfig:
groupId: 10003
mountPoints:
  - fcDir: /mnt/auto
    nasDir: /serverless-devs-egg
    serverAddr: example.com
userId: 10003

[2021-08-17T14:32:53.721] [INFO ] [FC-DEPLOY] - Checking Function egg exists
[2021-08-17T14:32:54.014] [INFO ] [FC-DEPLOY] - Checking Trigger serverless-devs-egg exists
[2021-08-17T14:32:54.233] [INFO ] [FC-DEPLOY] - Checking Trigger serverless-devs-egg exists
[2021-08-17T14:32:54.408] [INFO ] [FC-DEPLOY] - Creating service: serverless-devs-egg
[2021-08-17T14:32:54.409] [INFO ] [FC-DEPLOY] - Creating function: egg
[2021-08-17T14:32:54.409] [INFO ] [FC-DEPLOY] - Creating triggers: ["serverless-devs-egg"]
 Make service serverless-devs-egg success.
 Make function serverless-devs-egg/egg success.
 Make trigger serverless-devs-egg/egg/serverless-devs-egg success.
[2021-08-17T14:32:58.095] [INFO ] [FC-DEPLOY] - Checking Service serverless-devs-egg exists
[2021-08-17T14:32:58.617] [INFO ] [FC-DEPLOY] - Checking Function egg exists
[2021-08-17T14:32:59.122] [INFO ] [FC-DEPLOY] - Checking Trigger serverless-devs-egg exists
[2021-08-17T14:32:59.336] [INFO ] [FC-DEPLOY] - Creating custom domain: egg.serverless-devs-egg.188077086902****.cn-shenzhen.fc.devsapp.net
[2021-08-17T14:33:00.983] [INFO ] [FC-DOMAIN] - Creating custom domain: egg.serverless-devs-egg.188077086902****.cn-shenzhen.fc.devsapp.net

There is auto config in the service: serverless-devs-egg
[2021-08-17T14:33:01.494] [INFO ] [WEB-FRAMEWORK] - nas component get src is: .
 upload done
Packing ...
file /test/start-egg/.s/zip is ignored.
Package complete.
 Start uploading file: /mnt/2bfb748534-tpm20-cn-shenzhen/serverless-devs-egg/egg/start-egg.zip
 File uploaded successfully: /mnt/2bfb748534-tpm20-cn-shenzhen/serverless-devs-egg/egg/start-egg.zip
 upload done
[2021-08-17T14:33:58.326] [INFO ] [FC-NAS] - unzipping file
[2021-08-17T14:34:10.528] [INFO ] [FC-NAS] - unzip done
 Try container acceleration
function-test:
  region: cn-shenzhen
  serviceName: serverless-devs-egg
  functionName: egg
  customDomains:
    - http://egg.serverless-devs-egg.188077086902****.cn-shenzhen.fc.devsapp.net

执行结果

成功部署该项目后，您可以在执行输出中查看到函数计算生成的临时域名，通过该临时域名可以访问刚部署的应用，例如执行以下命令访问应用：

curl http://egg.serverless-devs-egg.188077086902****.cn-shenzhen.fc.devsapp.net