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通过函数计算的Custom Runtime，您可以使用Ruby 2.7在函数计算平台编写函数。本文介绍如何快速部署和调用Ruby函数。您可以修改Ruby示例中的代码实现二次开发，满足您的需求。

前提条件

您已完成以下操作：

操作步骤

在目标目录中，执行以下命令，初始化项目。
```
s init start-fc-custom-samples -d start-fc-custom-samples
```

执行以下命令，进入项目目录。

cd start-fc-custom-samples/ruby/event-demo/

执行以下命令，安装依赖。

s deploy

输出示例：

[2021-09-08T15:23:15.388] [INFO ] [S-CLI] - Start ...
[2021-09-08T15:23:15.941] [INFO ] [FC-DEPLOY] - Using region: cn-hangzhou
[2021-09-08T15:23:15.942] [INFO ] [FC-DEPLOY] - Using access alias: default
[2021-09-08T15:23:15.942] [INFO ] [FC-DEPLOY] - Using accessKeyID: 188077086902****
[2021-09-08T15:23:15.942] [INFO ] [FC-DEPLOY] - Using accessKeySecret: LTAI4G4cwJkK4Rza6xd9****
  Using fc deploy type: sdk, If you want to deploy with pulumi, you can [s cli fc-default set deploy-type pulumi] to switch.
[2021-09-08T15:23:16.159] [INFO ] [FC-DEPLOY] - Checking Service custom-demo exists
[2021-09-08T15:23:16.352] [INFO ] [FC-DEPLOY] - Checking Function rubyEventFunc exists
  Make service custom-demo success.
  Make function custom-demo/rubyEventFunc success.
[2021-09-08T15:23:17.100] [INFO ] [FC-DEPLOY] - Checking Service custom-demo exists
[2021-09-08T15:23:17.197] [INFO ] [FC-DEPLOY] - Checking Function rubyEventFunc exists

Tips for next step
======================
* Display information of the deployed resource: s info
* Display metrics: s metrics
* Display logs: s logs
* Invoke remote function: s invoke
* Remove Service: s remove service
* Remove Function: s remove function
* Remove Trigger: s remove trigger
* Remove CustomDomain: s remove domain

fc-ruby-demo-fc-ruby:
  region: cn-hangzhou
  service:
    name: custom-demo
  function:
    name: rubyEventFunc
    runtime: custom
    handler: index.handler
    memorySize: 512
    timeout: 3

执行以下命令，远程调用函数。

s invoke -e "{}"

输出示例：

[2021-09-08T15:24:43.530] [INFO ] [S-CLI] - Start ...
========= FC invoke Logs begin =========
FC Invoke Start RequestId: 76b7c995-f8d3-411e-8da0-c674facb3a20
{}
FC Invoke End RequestId: 76b7c995-f8d3-411e-8da0-c674facb3a20

Duration: 3.75 ms, Billed Duration: 4 ms, Memory Size: 512 MB, Max Memory Used: 18.71 MB
========= FC invoke Logs end =========

FC Invoke Result:
{}


End of method: invoke