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This topic describes how to deploy a Koa.js application to Function Compute. Function Compute provides a method different from traditional deployment methods. You can deploy a traditional Koa.js application to Function Compute and use the application for production without performing operations such as purchasing a server. The deployed Koa.js application can use the auto scaling, pay-as-you-go, and O&M-free features of Function Compute.

Prerequisites

The following operations are complete:

Procedure

Run the following command in the specified directory to initialize a project:

s init devsapp/start-koa -d start-koa

The -d parameter specifies the project name. In this example, the project name is start-koa.

Note Skip this step if the item exists.

Sample command output:

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

 devsapp!start-koa@0.0.8.zip file decompression completed
 please select credential alias default

     _   __
    | | / /
    | |/ /  ___   __ _
    |    \ / _ \ / _` |
    | |\  \ (_) | (_| |
    \_| \_/\___/ \__,_|


    Welcome to the start-koa 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 Koa project:
         Full yaml configuration: https://github.com/devsapp/koa#%E5%AE%8C%E6%95%B4yaml
         Koa development docs   : https://www.koajs.com.cn/
     This application homepage: https://github.com/devsapp/start-koa


 Thanks for using Serverless-Devs
 You could [cd /test/start-koa] 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

Run the following command to go to the project directory:
```
cd start-koa
```

Run the following command to deploy the project:

s deploy

Sample command output:

[2021-08-30T15:40:24.764] [INFO ] [S-CLI] - Start ...
[2021-08-30T15:40:24.773] [INFO ] [S-CLI] - Start the pre-action
[2021-08-30T15:40:24.773] [INFO ] [S-CLI] - Action: npm install --production
npm notice created a lockfile as package-lock.json. You should commit this file.
npm WARN start-koa@1.0.0 No description
npm WARN start-koa@1.0.0 No repository field.

added 44 packages from 23 contributors in 1.399s

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

[2021-08-30T15:40:26.558] [INFO ] [S-CLI] - End the pre-action
  devsapp!koa@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.
[2021-08-30T15:40:40.923] [WARN ] [KOA] - The startup file is not found, create a [start.sh] as the startup file.
  Using web framework type: nas, If you want to deploy with container, you can [s cli fc-default set web-framework container] to switch.
(node:10777) [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)
  End of request
  Deployed.
  End of request
[2021-08-30T15:40:47.580] [INFO ] [FC-DEPLOY] - Using region: cn-shenzhen
[2021-08-30T15:40:47.581] [INFO ] [FC-DEPLOY] - Using access alias: default
[2021-08-30T15:40:47.581] [INFO ] [FC-DEPLOY] - Using accessKeyID: 188077086902****
[2021-08-30T15:40:47.581] [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.
[2021-08-30T15:40:48.291] [INFO ] [FC-DEPLOY] - Checking Service serverless-devs-koa exists
[2021-08-30T15:40:48.643] [INFO ] [FC-DEPLOY] - Setting role: AliyunFCDefaultRole
[2021-08-30T15:40:48.950] [INFO ] [RAM] - Checking Role AliyunFCDefaultRole exists
[2021-08-30T15:40:49.118] [INFO ] [RAM] - Updating role: AliyunFCDefaultRole
[2021-08-30T15:40:49.218] [INFO ] [RAM] - Checking Plicy AliyunFCDefaultRolePolicy exists
[2021-08-30T15:40:49.353] [INFO ] [FC-DEPLOY] - Using vpcConfig: auto: fc will try to generate related vpc resources automatically
[2021-08-30T15:40:50.147] [INFO ] [VPC] - Getting vpc: fc-deploy-component-generated-vpc-cn-shenzhen
[2021-08-30T15:40:50.308] [INFO ] [VPC] - Getting vswitch: fc-deploy-component-generated-vswitch-cn-shenzhen
[2021-08-30T15:40:50.443] [INFO ] [VPC] - Getting securityGroup: fc-deploy-component-generated-securityGroup-cn-shenzhen
[2021-08-30T15:40:50.626] [INFO ] [FC-DEPLOY] - Generated vpcConfig:
securityGroupId: sg-wz92ctigpi221smc****
vSwitchId: vsw-wz9qnuult4q5g4f7n****
vpcId: vpc-wz9x9bzs0wtvjgt6n****

[2021-08-30T15:40:50.627] [INFO ] [FC-DEPLOY] - Using nasConfig: auto: fc will try to generate related nas file system automatically
[2021-08-30T15:41:15.512] [INFO ] [FC-DEPLOY] - Generated nasConfig:
groupId: 10003
mountPoints:
  - fcDir: /mnt/auto
    nasDir: /serverless-devs-koa
    serverAddr: example.com
userId: 10003

[2021-08-30T15:41:15.514] [INFO ] [FC-DEPLOY] - Checking Function koa exists
[2021-08-30T15:41:15.617] [WARN ] [FC-DEPLOY] - Image registry.cn-shenzhen.aliyuncs.com/web-framework/nodejs12:0.0.1 dose not exist locally.
Maybe you need to run 's build' first if it dose not exist remotely.
[2021-08-30T15:41:15.621] [INFO ] [FC-DEPLOY] - Checking Trigger serverless-devs-koa exists
[2021-08-30T15:41:15.719] [INFO ] [FC-DEPLOY] - Checking Trigger serverless-devs-koa exists
[2021-08-30T15:41:15.824] [INFO ] [FC-DEPLOY] - Creating service: serverless-devs-koa
[2021-08-30T15:41:15.824] [INFO ] [FC-DEPLOY] - Creating function: koa
[2021-08-30T15:41:15.825] [INFO ] [FC-DEPLOY] - Creating triggers: ["serverless-devs-koa"]
  Make service serverless-devs-koa success.
  Make function serverless-devs-koa/koa success.
  Make trigger serverless-devs-koa/koa/serverless-devs-koa success.
[2021-08-30T15:41:18.879] [INFO ] [FC-DEPLOY] - Checking Service serverless-devs-koa exists
[2021-08-30T15:41:18.950] [INFO ] [FC-DEPLOY] - Checking Function koa exists
[2021-08-30T15:41:19.107] [INFO ] [FC-DEPLOY] - Checking Trigger serverless-devs-koa exists
[2021-08-30T15:41:19.323] [INFO ] [FC-DEPLOY] - Creating custom domain: koa.serverless-devs-koa.188077086902****.cn-shenzhen.fc.devsapp.net
[2021-08-30T15:41:20.017] [INFO ] [FC-DOMAIN] - Creating custom domain: koa.serverless-devs-koa.188077086902****.cn-shenzhen.fc.devsapp.net

There is auto config in the service: serverless-devs-koa
[2021-08-30T15:41:20.303] [INFO ] [WEB-FRAMEWORK] - nas component get src is: ./src
Packing ...
Package complete.
  Start uploading file: /mnt/2bfb748534-tpm20-cn-shenzhen/serverless-devs-koa/koa/src.zip
  File uploaded successfully: /mnt/2bfb748534-tpm20-cn-shenzhen/serverless-devs-koa/koa/src.zip
  upload done
[2021-08-30T15:41:54.207] [INFO ] [FC-NAS] - unzipping file
[2021-08-30T15:41:56.324] [INFO ] [FC-NAS] - unzip done
  Try container acceleration
framework-test:
  region: cn-shenzhen
  serviceName: serverless-devs-koa
  functionName: koa
  customDomains:
    - http://koa.serverless-devs-koa.188077086902****.cn-shenzhen.fc.devsapp.net

Result

After the project is deployed, you can view the temporary domain name generated by Function Compute in the execution output. The temporary domain name can be used to access the newly deployed application. For example, run the following command to access the application:

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

Note The temporary domain name is used only for demonstration and development purposes. It is valid for a limited period of time. You must use a domain name that has obtained an Internet Content Provider (ICP) filing from Alibaba Cloud for production. For more information, see Configure a custom domain name.