Serverless AWS Lambda Development · 课时

无服务器框架入门

了解 Serverless Framework，这是一个与云服务商无关的工具，可简化跨多个提供商部署和管理无服务器应用的过程

无服务器框架入门 是 CoddyKit 上的免费 Serverless AWS Lambda Development 课时。这是第 2 节课，共 4 节。你可以在下方免费阅读本课时的完整内容 — 然后在浏览器中使用内置代码编辑器和全天候 AI 导师进行实践。这是 Serverless AWS Lambda Development 学习路径的一部分，你的进度在网页和 CoddyKit 应用中同步。 Serverless AWS Lambda Development 课程共包含 4 节课。

本课时的部分内容尚未翻译，以英文显示。

Intro to Serverless Framework

Welcome! In this lesson, we'll get acquainted with the Serverless Framework, a powerful command-line interface (CLI) tool.

It helps you build, deploy, and manage serverless applications across different cloud providers, including AWS Lambda.

Why Use Serverless Framework?

The Serverless Framework simplifies serverless development significantly. Here's why it's popular:

Cloud-Agnostic: Works with AWS, Azure, Google Cloud, and more.
Simplified Deployment: Automates the creation of cloud resources needed for your functions.
Consistency: Provides a standardized way to define and manage your serverless applications.
Focus on Code: Lets you concentrate on writing your application logic, not infrastructure setup.

Core Concepts: Services & Functions

Let's understand some key terms:

Service: Your project. It's a collection of related functions, events, and resources. Defined in a serverless.yml file.
Function: A single Lambda function (or similar compute unit in other clouds). It's your actual code.
Event: What triggers your function. Examples include HTTP requests, S3 uploads, or database changes.

Installing the Serverless CLI

First, you'll need Node.js and npm installed on your machine. Then, you can install the Serverless Framework CLI globally using npm:

npm install -g serverless

Creating Your First Service

Once installed, you can create a new serverless service using the serverless create command. You'll specify a template for your desired cloud provider and runtime.

For an AWS Node.js service, you might use:

serverless create --template aws-nodejs --path my-first-service

Understanding serverless.yml

The core of your Serverless Framework project is the serverless.yml file. This YAML file defines your service's configuration, including provider, functions, and events.

Here's a basic structure:

service: my-first-service
frameworkVersion: '3'

provider:
  name: aws
  runtime: nodejs18.x

functions:
  hello:
    handler: handler.hello

Defining a Lambda Function & Event

In serverless.yml, you define your Lambda functions and the events that trigger them. For example, to make our hello function accessible via an HTTP API endpoint:

service: my-first-service
frameworkVersion: '3'

provider:
  name: aws
  runtime: nodejs18.x

functions:
  hello:
    handler: handler.hello
    events:
      - httpApi:
          path: /hello
          method: get

Writing the Handler Code

Now, let's look at the actual Node.js code for our hello function, typically located in handler.js. This code will be executed when the HTTP API event triggers it.

Try running this example:

'use strict';

module.exports.hello = async (event) => {
  return {
    statusCode: 200,
    body: JSON.stringify(
      {
        message: 'Hello from Serverless Framework!',
        input: event,
      },
      null,
      2
    ),
  };
};

Deploying Your Service

Once your serverless.yml and handler code are ready, deploying your serverless application to AWS is as simple as running a single command:

The framework will package your code, create the necessary AWS resources (Lambda function, API Gateway endpoint, IAM roles), and deploy them.

serverless deploy

Quick Check: Serverless Concepts

What is the primary purpose of the serverless.yml file in a Serverless Framework project?

Recap: Serverless Framework Intro

Great job! In this lesson, you've been introduced to the Serverless Framework. You learned:

What the Serverless Framework is and why it's useful.
Key concepts like services, functions, and events.
How to install the CLI and create a new service.
The role of serverless.yml in defining your application.
How to write a simple Lambda handler and deploy your service.

Next up, we'll dive deeper into more advanced deployment strategies!

常见问题解答

「无服务器框架入门」课时是免费的吗？

是的 — 「无服务器框架入门」的完整文本可在网页上免费阅读。要进行交互式练习（内置代码编辑器和全天候 AI 导师）并解锁 Serverless AWS Lambda Development 课程的其余内容，请升级到 CoddyKit PRO。 Serverless AWS Lambda Development 课程共包含 4 节课。

「无服务器框架入门」这节课中我会学到什么？

了解 Serverless Framework，这是一个与云服务商无关的工具，可简化跨多个提供商部署和管理无服务器应用的过程你通过在浏览器中直接运行的动手代码来练习 Serverless AWS Lambda Development，全天候 AI 导师会在你学习这节课的过程中回答你的问题。

学习 Serverless AWS Lambda Development 需要有经验吗？

无需任何先前经验。CoddyKit 上的 Serverless AWS Lambda Development 课程适合初学者到高级学习者，你可以从这里开始或从头开始，按照自己的节奏学习。这是第 2 节课，共 4 节。

「无服务器框架入门」课时需要多长时间？

大多数 CoddyKit 课程大约需要 5–10 分钟。每节课都很精短且互动，所以你能稳步进步，并在网页和应用中从离开的地方继续。

我能在这节 Serverless AWS Lambda Development 课中编写并运行代码吗？

能。每节 Serverless AWS Lambda Development 课都包含内置代码编辑器，你可以在浏览器中直接编写并运行真实代码，并获得即时 AI 反馈 — 无需本地设置。

此课程中的所有课时

← 返回 Serverless AWS Lambda Development