00 · AWS Lambda 心智模型学习指南：总览、思维导图与阅读路线（专栏目录）

🇬🇧 English version ｜ 📦 GitHub: https://github.com/geekchow/aws-lambda-guide

你在这里： 本指南包的入口。

读完本文你将知道： 整个知识版图的全貌、指南包的组织方式，以及下一步该读哪个文件。

本指南包从第一性原理讲解 AWS（Amazon Web Services，亚马逊云服务）Lambda：它为什么存在、一次调用在服务内部究竟如何流转，以及版本（Version） 、**别名（Alias）和预置并发（Provisioned Concurrency）**如何嵌入这幅图景。全篇沿一条主线展开：Why（为什么）→ What（是什么）→ 概念地图 → 贯穿示例 → 组件深入 → 完整走查 ，并由一个贯穿始终的示例串联：网店 ShopFast 的 checkout（结账）函数在黑色星期五那一周的经历。

缩写对照表

缩写	英文全称	中文	在本指南中的含义
AWS	Amazon Web Services	亚马逊云服务	亚马逊的云平台
API	Application Programming Interface	应用程序编程接口	如 Lambda `Invoke` API、Runtime API
ARN	Amazon Resource Name	亚马逊资源名称	AWS 资源的全局唯一标识
PC	Provisioned Concurrency	预置并发	预先初始化好的 Lambda 执行环境
RC	Reserved Concurrency	预留并发	函数级并发的下限兼上限
VM	Virtual Machine	虚拟机	隔离的客户机操作系统
microVM	micro Virtual Machine	微虚拟机	极简、快速启动的虚拟机（Firecracker）
VMM	Virtual Machine Monitor	虚拟机监视器	管理虚拟机的程序（Firecracker 本身）
KVM	Kernel-based Virtual Machine	基于内核的虚拟机	Firecracker 使用的 Linux 内核虚拟化
AZ	Availability Zone	可用区	Region 内彼此隔离的数据中心组
RPS	Requests Per Second	每秒请求数	请求速率
GB-s	Gigabyte-second	GB 秒	计费单位 = 内存（GB）× 时长（秒）
IAM	Identity and Access Management	身份与访问管理	AWS 权限体系
SQS	Simple Queue Service	简单队列服务	AWS 消息队列
SNS	Simple Notification Service	简单通知服务	AWS 发布/订阅服务
S3	Simple Storage Service	简单存储服务	AWS 对象存储
ECR	Elastic Container Registry	弹性容器镜像仓库	AWS 容器镜像仓库
EC2	Elastic Compute Cloud	弹性计算云	AWS 虚拟服务器
ECS	Elastic Container Service	弹性容器服务	AWS 容器编排服务
CLI	Command Line Interface	命令行接口	`aws` 命令
SDK	Software Development Kit	软件开发工具包	各语言的 AWS 客户端库
SAM	Serverless Application Model	无服务器应用模型	AWS 的 CloudFormation 无服务器扩展
CDK	Cloud Development Kit	云开发工具包	用通用编程语言写基础设施即代码
CI/CD	Continuous Integration / Continuous Delivery	持续集成/持续交付	自动化构建与部署流水线
ESM	Event Source Mapping	事件源映射	Lambda 托管的队列/流轮询器
VPC	Virtual Private Cloud	虚拟私有云	AWS 中的私有网络
CPU	Central Processing Unit	中央处理器	算力
HTTP	Hypertext Transfer Protocol	超文本传输协议	Web 通信协议
SigV4	Signature Version 4	签名版本 4	AWS 请求签名算法
PaaS	Platform as a Service	平台即服务	如 Heroku、Elastic Beanstalk
p99	99th percentile	第 99 百分位	99% 的请求都快于该延迟

一图看全貌（必备思维导图）

本图回答：Lambda 有哪些组成部分，它们如何分组？
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要解决的问题
闲置服务器也要付费
容量规划靠猜
打补丁与扩缩容的苦活
原地部署风险高
核心概念
函数 Function
执行环境
调用与并发
版本: 不可变快照
别名: 可移动指针
预置并发 PC
派生: 冷启动
派生: 预留并发
关键组件
版本存储
负责不可变快照
别名路由
负责限定符到版本
PC 管理器与自动扩缩
负责预热池大小
调用前端与计数服务
负责准入与限额
分配与放置服务
负责找到或创建环境
执行环境
负责运行你的代码
贯穿示例
ShopFast 黑五结账
v8 经 prod 别名

金丝雀发布
09:00 开售前预热 PC 400
关键流程
热调用正常路径
冷启动溢出
达上限时 429 限流
切换别名回滚
连接数先于容量耗尽

指南包的组织方式

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02 是什么
03 概念地图
04 贯穿示例
05.1 版本
05.2 别名
05.3 预置并发
05.4 调用前端

与计数服务
05.5 分配与

放置服务
05.6 执行环境
05.7 受连接数

约束的后端
06 完整走查
07 后续练习

图注：阅读顺序------先广度（01--04），再按示例中出场顺序对每个关键组件深入（05.1--05.6），外加受连接数约束的后端（05.7），最后完整重放（06）。

#	文件	阶段	你将获得
01	01 为什么	为什么	服务器、容量规划与原地部署之痛
02	02 是什么	是什么	一句话定义、边界、生态位置
03	03 概念地图	概念地图	6 个核心概念、6 个关键组件、协作总图
04	04 贯穿示例	贯穿示例	ShopFast `checkout` 黑五一周，浅层追踪
05.1	05.1 版本	深入	不可变快照、`$LATEST`、限定 ARN
05.2	05.2 别名	深入	指针、加权路由、金丝雀与回滚
05.3	05.3 预置并发	深入	预热池、溢出、自动扩缩、成本
05.4	05.4 调用前端与并发	深入	准入、并发计算、预留并发、限流
05.5	05.5 分配与放置	深入	找到热环境或新建环境
05.6	05.6 执行环境	深入	Firecracker 微虚拟机、Init/Invoke/Shutdown、冻结/解冻
05.7	05.7 受连接数约束的后端	深入	CloudHSM/数据库连接为何先耗尽；RDS Proxy、KMS 密钥存储、服务层
06	06 完整走查	走查	示例端到端的完整深度重放
07	07 自测与实验	练习	自测题、动手实验脚本、延伸阅读

配套图源：diagrams/lambda-architecture.drawio ------ 包含控制面与数据面的泳道全景图（用 draw.io / diagrams.net 打开）。

关于内部实现的说明。 Frontend Invoke service（调用前端） 、Counting service（计数服务） 、Assignment service（分配服务）、*Placement service（放置服务）*等名称来自 AWS 公开的架构演讲（re:Invent "A closer look at AWS Lambda" 系列）和 Firecracker 论文。它们是可靠的心智模型，但不是公开的 API 契约，AWS 会持续演进。你能配置的一切（版本、别名、PC（Provisioned Concurrency，预置并发）、预留并发）都是公开且有文档的 API。

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