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title: "Public Cloud Learning Sessions (OpenText)- Serverless Computing - 20240903"
type: source
tags:
- Serverless
- AWS
- Lambda
- OpenText
- Cloud Learning
date: 2024-09-03
---
## Source File
- [[raw/Cloud & DevOps/Public-Cloud-Learning-Sessions/09_Serverless_AI/public-cloud-learning-sessions-opentext-serverless-computing-20240903-160139-mee.md]]
## Summary
- 核心主题AWS 无服务器计算Serverless Computing学习会议
- 问题域:云原生架构、事件驱动计算、无服务器函数
- 方法/机制Lambda 事件触发机制、Step Functions 工作流编排、API Gateway API 管理、SAM 本地开发
- 结论/价值Serverless 模式帮助企业快速上市、聚焦业务、降低 TCO、按需付费、自动扩展
## Key Claims
- Lambda 函数由事件触发(状态变化),支持同步、异步、事件源映射三种调用方式
- AWS 与客户共担运维责任AWS 负责基础设施,客户负责代码
- Lambda 版本和别名用于管理代码变更,发布新版本后可通过别名指向
- Lambda Layers 支持跨函数共享公共代码
## Key Quotes
> "Lambda functions are triggered by events, which are changes in state."
> Whenever you see that you have written code and you want that this code is final, you can publish as a new version.
## Key Concepts
- [[Lambda]]AWS 无服务器计算服务开发者只需编写业务逻辑AWS 处理基础设施
- [[Step Functions]]:无服务器工作流服务,基于状态机编排多个 AWS 服务
- [[API Gateway]]:托管服务,用于创建、发布和保护 API
- [[Serverless Application Model]]SAM本地开发和部署无服务器应用的工具基于 CloudFormation
- [[Event-driven Computing]]事件驱动计算Lambda 函数的触发机制
- [[Execution Role]]Lambda 执行角色,定义函数可以执行的操作
- [[Resource-based Policy]]:基于资源的策略,定义谁可以触发函数
## Key Entities
- [[AWS]]:云服务提供商
- [[OpenText]]:企业软件公司
## Connections
- [[Lambda]] ← powers ← [[Step Functions]]
- [[Lambda]] ← exposed_by ← [[API Gateway]]
- [[Lambda]] ← deployed_with ← [[Serverless Application Model]]
- [[AWS Lambda]] ← manages_infrastructure ← [[Event-driven Computing]]
## Contradictions
- 与传统 EC2 对比EC2 提供灵活性和控制Lambda 允许开发者聚焦业务逻辑