本文介绍如何将Tornado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Tornado应用一键部署至云端直接用于生产，并且拥有弹性伸缩、按量付费及免运维等特性。

前提条件

您已完成以下操作：

操作步骤

在目标目录内执行以下命令，初始化项目。

s init devsapp/start-tornado -d start-tornado

-d用于指定项目名称，本示例以项目名称start-tornado为例，介绍如何迁移Tornado至函数计算。

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-tornado@0.0.7.zip file decompression completed
 please select credential alias default

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


    Welcome to the start-tornado 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 Tornado project:
         Full yaml configuration : https://github.com/devsapp/tornado#%E5%AE%8C%E6%95%B4yaml
         Tornado development docs: https://www.tornadoweb.org/en/stable/
     This application homepage: https://github.com/devsapp/start-tornado


‍ Thanks for using Serverless-Devs
 You could [cd /test/start-flask/strat-tornado] 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-tornado
```

执行以下命令，部署项目。

s deploy

输出示例：

[2021-08-30T17:41:56.340] [INFO ] [S-CLI] - Start ...
[2021-08-30T17:41:56.350] [INFO ] [S-CLI] - Start the pre-action
[2021-08-30T17:41:56.350] [INFO ] [S-CLI] - Action: pip3 install -t . -r requirements.txt
WARNING: Running pip install with root privileges is generally not a good idea. Try `pip3 install --user` instead.
Collecting tornado==6.0.4 (from -r requirements.txt (line 1))
  Downloading http://mirrors.cloud.aliyuncs.com/pypi/packages/95/84/119a46d494f008969bf0c775cb2c6b3579d3c4cc1bb1b41a022aa93ee242/tornado-6.0.4.tar.gz (496kB)
    100% |████████████████████████████████| 501kB 32.8MB/s
Installing collected packages: tornado
  Running setup.py install for tornado ... done
Successfully installed tornado-6.0.4
[2021-08-30T17:41:57.847] [INFO ] [S-CLI] - End the pre-action
 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:13961) [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
[2021-08-30T17:42:03.253] [INFO ] [FC-DEPLOY] - Using region: cn-shenzhen
[2021-08-30T17:42:03.254] [INFO ] [FC-DEPLOY] - Using access alias: default
[2021-08-30T17:42:03.254] [INFO ] [FC-DEPLOY] - Using accessKeyID: 188077086902****
[2021-08-30T17:42:03.255] [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.
[2021-08-30T17:42:03.608] [INFO ] [FC-DEPLOY] - Checking Service serverless-devs-tornado exists
[2021-08-30T17:42:03.784] [INFO ] [FC-DEPLOY] - Setting role: AliyunFCDefaultRole
[2021-08-30T17:42:03.884] [INFO ] [RAM] - Checking Role AliyunFCDefaultRole exists
[2021-08-30T17:42:04.004] [INFO ] [RAM] - Updating role: AliyunFCDefaultRole
[2021-08-30T17:42:04.107] [INFO ] [RAM] - Checking Plicy AliyunFCDefaultRolePolicy exists
[2021-08-30T17:42:04.253] [INFO ] [FC-DEPLOY] - Using vpcConfig: auto: fc will try to generate related vpc resources automatically
[2021-08-30T17:42:04.891] [INFO ] [VPC] - Getting vpc: fc-deploy-component-generated-vpc-cn-shenzhen
[2021-08-30T17:42:04.982] [INFO ] [VPC] - Getting vswitch: fc-deploy-component-generated-vswitch-cn-shenzhen
[2021-08-30T17:42:05.125] [INFO ] [VPC] - Getting securityGroup: fc-deploy-component-generated-securityGroup-cn-shenzhen
[2021-08-30T17:42:05.335] [INFO ] [FC-DEPLOY] - Generated vpcConfig:
securityGroupId: sg-wz92ctigpi221smc****
vSwitchId: vsw-wz9qnuult4q5g4f7n****
vpcId: vpc-wz9x9bzs0wtvjgt6n****

[2021-08-30T17:42:05.335] [INFO ] [FC-DEPLOY] - Using nasConfig: auto: fc will try to generate related nas file system automatically
[2021-08-30T17:42:21.530] [INFO ] [FC-DEPLOY] - Generated nasConfig:
groupId: 10003
mountPoints:
  - fcDir: /mnt/auto
    nasDir: /serverless-devs-tornado
    serverAddr: example.com
userId: 10003

[2021-08-30T17:42:21.532] [INFO ] [FC-DEPLOY] - Checking Function tornado exists
[2021-08-30T17:42:21.648] [WARN ] [FC-DEPLOY] - Image registry.cn-shenzhen.aliyuncs.com/web-framework/python3:0.0.1 dose not exist locally.
Maybe you need to run 's build' first if it dose not exist remotely.
[2021-08-30T17:42:21.663] [INFO ] [FC-DEPLOY] - Checking Trigger serverless-devs-tornado exists
[2021-08-30T17:42:21.766] [INFO ] [FC-DEPLOY] - Checking Trigger serverless-devs-tornado exists
[2021-08-30T17:42:21.908] [INFO ] [FC-DEPLOY] - Creating service: serverless-devs-tornado
[2021-08-30T17:42:21.909] [INFO ] [FC-DEPLOY] - Creating function: tornado
[2021-08-30T17:42:21.909] [INFO ] [FC-DEPLOY] - Creating triggers: ["serverless-devs-tornado"]
  Make service serverless-devs-tornado success.
  Make function serverless-devs-tornado/tornado success.
  Make trigger serverless-devs-tornado/tornado/serverless-devs-tornado success.
[2021-08-30T17:42:24.947] [INFO ] [FC-DEPLOY] - Checking Service serverless-devs-tornado exists
[2021-08-30T17:42:25.023] [INFO ] [FC-DEPLOY] - Checking Function tornado exists
[2021-08-30T17:42:25.157] [INFO ] [FC-DEPLOY] - Checking Trigger serverless-devs-tornado exists
[2021-08-30T17:42:25.374] [INFO ] [FC-DEPLOY] - Creating custom domain: tornado.serverless-devs-tornado.188077086902****.cn-shenzhen.fc.devsapp.net
[2021-08-30T17:42:26.033] [INFO ] [FC-DOMAIN] - Creating custom domain: tornado.serverless-devs-tornado.188077086902****.cn-shenzhen.fc.devsapp.net

There is auto config in the service: serverless-devs-tornado
[2021-08-30T17:42:26.484] [INFO ] [WEB-FRAMEWORK] - nas component get src is: ./src
Packing ...
Package complete.
  Start uploading file: /mnt/2bfb748534-tpm20-cn-shenzhen/serverless-devs-tornado/tornado/src.zip
  File uploaded successfully: /mnt/2bfb748534-tpm20-cn-shenzhen/serverless-devs-tornado/tornado/src.zip
  upload done
[2021-08-30T17:43:01.283] [INFO ] [FC-NAS] - unzipping file
[2021-08-30T17:43:02.783] [INFO ] [FC-NAS] - unzip done
  Try container acceleration
framework-test:
  region: cn-shenzhen
  serviceName: serverless-devs-tornado
  functionName: tornado
  customDomains:
    - >-
      http://tornado.serverless-devs-tornado.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://tornado.serverless-devs-tornado.188077086902****.cn-shenzhen.fc.devsapp.net