52 lines
2.4 KiB
Markdown
52 lines
2.4 KiB
Markdown
---
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title: "Public Cloud Learning Sessions (OpenText)- Serverless Computing - 20240903"
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type: source
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tags:
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- Serverless
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- AWS
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- Lambda
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- OpenText
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- Cloud Learning
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date: 2024-09-03
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---
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## Source File
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- [[raw/Cloud & DevOps/Public-Cloud-Learning-Sessions/09_Serverless_AI/public-cloud-learning-sessions-opentext-serverless-computing-20240903-160139-mee.md]]
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## Summary
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- 核心主题：AWS 无服务器计算（Serverless Computing）学习会议
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- 问题域：云原生架构、事件驱动计算、无服务器函数
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- 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
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- 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
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## Key Claims
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- 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
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- AWS 与客户共担运维责任，AWS 负责基础设施，客户负责代码
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- 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
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- Lambda Layers 支持跨函数共享公共代码
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## Key Quotes
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> "Lambda functions are triggered by events, which are changes in state."
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> Whenever you see that you have written code and you want that this code is final, you can publish as a new version.
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## Key Concepts
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- [[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
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- [[Step Functions]]：无服务器工作流服务，基于状态机编排多个 AWS 服务
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- [[API Gateway]]：托管服务，用于创建、发布和保护 API
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- [[Serverless Application Model]]：SAM，本地开发和部署无服务器应用的工具，基于 CloudFormation
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- [[Event-driven Computing]]：事件驱动计算，Lambda 函数的触发机制
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- [[Execution Role]]：Lambda 执行角色，定义函数可以执行的操作
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- [[Resource-based Policy]]：基于资源的策略，定义谁可以触发函数
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## Key Entities
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- [[AWS]]：云服务提供商
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- [[OpenText]]：企业软件公司
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## Connections
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- [[Lambda]] ← powers ← [[Step Functions]]
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- [[Lambda]] ← exposed_by ← [[API Gateway]]
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- [[Lambda]] ← deployed_with ← [[Serverless Application Model]]
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- [[AWS Lambda]] ← manages_infrastructure ← [[Event-driven Computing]]
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## Contradictions
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- 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 |