87 lines
2.7 KiB
Markdown
87 lines
2.7 KiB
Markdown
---
|
||
title: "SAM Serverless Application Model"
|
||
type: entity
|
||
tags:
|
||
- AWS
|
||
- Serverless
|
||
- IaC
|
||
- CloudFormation
|
||
sources:
|
||
- public-cloud-learning-sessions-opentext-serverless-computing-20240903-160139-mee
|
||
last_updated: 2026-04-14
|
||
---
|
||
|
||
## Aliases
|
||
- SAM
|
||
- AWS SAM
|
||
- Serverless Application Model
|
||
|
||
## Definition
|
||
|
||
AWS SAM（Serverless Application Model）是 AWS 官方的开源 IaC 工具，基于 AWS CloudFormation 构建，专门简化无服务器应用（Lambda、API Gateway、Step Functions 等）的定义、部署和管理。SAM 提供简化的 YAML 语法，降低 CloudFormation 模板的复杂度，同时支持本地开发和测试。
|
||
|
||
## Core Properties
|
||
|
||
| 属性 | 值 |
|
||
|------|-----|
|
||
| 基础 | AWS CloudFormation |
|
||
| 配置格式 | YAML（简化语法） |
|
||
| CLI | AWS SAM CLI，支持本地调用和测试 |
|
||
| 本地测试 | SAM Local — 本地启动 API Gateway + Lambda |
|
||
| 部署 | `sam deploy`、`sam build`、`sam package` |
|
||
| 应用发布 | AWS Serverless Application Repository（应用市场） |
|
||
|
||
## SAM vs CloudFormation
|
||
|
||
| 特性 | SAM | CloudFormation |
|
||
|------|-----|----------------|
|
||
| 语法 | 简化 YAML | JSON/YAML |
|
||
| 资源类型 | 仅 Serverless 资源 | 全部 AWS 资源 |
|
||
| 本地测试 | SAM Local | 不支持 |
|
||
| 打包上传 | `sam package` | `aws cloudformation package` |
|
||
| 模板继承 | `!Sub`、`!Ref` | 原生支持 |
|
||
|
||
## Typical SAM Template
|
||
|
||
```yaml
|
||
AWSTemplateFormatVersion: '2010-09-09'
|
||
Transform: AWS::Serverless-2016-10-31
|
||
Resources:
|
||
MyFunction:
|
||
Type: AWS::Serverless::Function
|
||
Properties:
|
||
Handler: app.handler
|
||
Runtime: python3.12
|
||
Events:
|
||
ApiEvent:
|
||
Type: Api
|
||
Properties:
|
||
Path: /hello
|
||
Method: get
|
||
MyApi:
|
||
Type: AWS::Serverless::Api
|
||
Properties:
|
||
StageName: prod
|
||
DefinitionBody:
|
||
# OpenAPI spec
|
||
```
|
||
|
||
## SAM CLI 常用命令
|
||
|
||
| 命令 | 作用 |
|
||
|------|------|
|
||
| `sam init` | 初始化新 SAM 项目 |
|
||
| `sam build` | 构建应用（处理依赖、Layer） |
|
||
| `sam local invoke` | 本地调用 Lambda 函数 |
|
||
| `sam local start-api` | 本地启动完整 API（API Gateway + Lambda） |
|
||
| `sam deploy` | 交互式部署到 AWS |
|
||
| `sam package` | 打包模板和代码到 S3 |
|
||
| `sam validate` | 验证模板语法 |
|
||
|
||
## Connections
|
||
- [[SAM-Serverless-Application-Model]] ← builds_on ← [[CloudFormation]]
|
||
- [[SAM-Serverless-Application-Model]] ← deploys ← [[AWS-Lambda]]
|
||
- [[SAM-Serverless-Application-Model]] ← deploys ← [[Amazon-API-Gateway]]
|
||
- [[SAM-Serverless-Application-Model]] ← deploys ← [[AWS-Step-Functions]]
|
||
- [[SAM-Serverless-Application-Model]] ← is_tool_of ← [[Serverless-Computing]]
|