Serverless

 最近做的 Serverless 概念的課程簡報

Serverless

 留言

開發工程必備的雲端架構知識

Paul Chen
DevOps @ 104 開發營運部

    

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• Serverless 由來
• FaaS？SaaS？Serverless？
• Serverless Architecture
• Serverless Limits
• Serverless Pros and Cons
• Recap
 留言

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Serverless 由來

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Serverless Providers

• AWS Lambda 
• Microsoft Azure Function
• Google Cloud Functions
• IBM Cloud Functions

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FaaS？SaaS？Serverless？

Note:

IaaS example: AWS EC2, OpenStack
PaaS example: Heroku, AWS Elastic Beanstalk
FaaS example: AWS Lambda
SaaS example: Gmail, Youtube, Office365, TravisCI

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So… What is Serverless?

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Serverless computing is a cloud computing execution model in which the cloud provider runs the server, and dynamically manages the allocation of machine resources. – Wiki

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Function as a service (FaaS) is a category of cloud computing services that provides a platform allowing customers to develop, run, and manage application functionalities without the complexity of building and maintaining the infrastructure. Building an application following this model is one way of achieving a “serverless” architecture. – Wiki

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Serverless Architecture on AWS

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The AWS serverless platform

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The AWS serverless platform

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Serverless Develop Limits

• Functional Programming
• Execution Duration
• Stateless

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Serverless Pros and Cons

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Pros : Cost-effective

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Pros : Scalability and Availability

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Pros of Serverless

• Cost-effective
• Efficient scalability
• High availability
• Reduced operational costs
• Focus on business, not on infrastructure

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Serverless Cons

and how AWS can help

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Cons of Serverless

• Complex system architecture
  • Latency
  • Difficulty in debugging and running local test
• Vendor lock-in

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AWS X-Ray

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AWS X-Ray Traces

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Serverless Application Model (SAM)

$ sam build --use-container
$ sam local invoke -e event.json ExampleLambda

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Recap

• Serverless architecture have servers, but they are not managed by you
• Functions are a core concept
• Scaling and High Availability is done by cloud providers
• Keeps cost low, by covering spikes and idle
• Focus on business, not on infrastructure

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End