Getting started w/ Serverless @ AWS UG

Transcript

1. Up, up and away Serverless on AWS Driss Amri @drissamri88
2. Who is Driss Amri? Blogger at drissamri.com Co-Founder ServerlessDays Belgium Traveler & Diver
3. Idea Customer
4. Idea Dude, Where’s my feature? Customer
5. Idea Request Servers Setup VMWares Customer Setup Network Security Functional testing Load testing Changing requirements Procurement new software Security testing
6. Idea Request Servers Setup VMWares Setup Network Security Functional testing Load testing Changing requirements Procurement new software Security testing Customer
7. Physical Servers Virtual Machines Containers Serverless Code Runtime OS Hardware
8. “The Cloud”
9. AWS
10. Virtual Machines Code Runtime OS Hardware Infrastructure as a Service
11. Code Runtime OS Hardware Container as a Service Containers
12. Serverless Code/Data Runtime OS Hardware Serverless
16. Technology is not the point
17. Services are not the point
18. Code is not the point
19. Code is a liability
21. AWS Lambda?
22. Example: Favorite Service
25. • First invocation • After deployment or configuration change • Instances killed due to age • Scaling out and existing instances busy Cold start frequency
26. The Burning Monk - I’m afraid you’re thinking about AWS Lambda cold starts all wrong
27. The Burning Monk - I’m afraid you’re thinking about AWS Lambda cold starts all wrong
28. The Burning Monk - I’m afraid you’re thinking about AWS Lambda cold starts all wrong
29. The Burning Monk - I’m afraid you’re thinking about AWS Lambda cold starts all wrong
30. • NO: Most likely not when using Node.js, Go, Python, … • MAYBE: Java (JVM) / .NET Are cold starts a big deal? * When used and optimized correctly
31. • NO: Asynchronous architectures - Event-Driven architectures are a best practise • NO: Batch processing • NO: User facing service with normal traffic patterns* - No problem for 99th percentile • MAYBE: User facing service with occasional traffic* • MAYBE: User facing service with lots of spread spiky traffic* Are cold starts a big deal? (Java/.NET edition) * When used and optimized correctly
32. • Keep function single purposed* • Minimize dependencies - webpack, serverless-optimizer-plugin, … • Use lightweight alternatives - Spring vs Dagger, Apache HTTP vs HttpUrlConnection • Prefer low overhead runtime (Go, node.js, Python) - Consider GraalVM - … possibly consider Provisioned Concurrency Minimize bootstrap
33. • Initialize as much as you can during startup - Static fields, constructor • Move state to global - But keep your invocations stateless • Avoid reflection • Fail fast • Right size memory usage - 1792 MB = 1 vCPU Optimize execution time
34. • AWS re:Invent 2019: [REPEAT 1] Best practices for AWS Lambda and Java (SVS403-R1) @sapessi ... more on AWS Lambda and Java • How to minimize AWS Lambda Java cold starts @drissamri88 • Programming AWS Lambda by John Chapin, Mike Roberts • Analyzing Cold Start latency of AWS Lambda @mikebroberts
36. Infrastructure-as-code
37. Infrastructure-as-code AWS • Serverless Framework • Terraform • Pulumi • CloudFormation • Serverless Application Model (SAM) • Cloud Development Kit (CDK) 3th party
38. Serverless Framework • Most widely used Serverless toolkit • Released in 2015 • Simple Developer Experience • Focus on Functions, not Cloud Infrastructure • Cloud-agnostic - AWS provider: - Compiles to CloudFormation - deployed as CloudFormation Stack
39. Serverless Framework
41. AWS SAM • Official AWS deployment framework • Released in 2016 • Built on top of CloudFormation - Deployed as CloudFormation Stack
42. AWS SAM
43. AWS SAM CLI sam init --runtime java11 sam package \ --output-template-file packaged.yaml \ --s3-bucket bucketname sam deploy \ --template-file packaged.yaml \ --stack-name sam-app \ --capabilities CAPABILITY_IAM \ --region eu-west-1 aws cloudformation delete-stack --stack-name sam-app
44. Cost control
45. https://theburningmonk.com/2019/01/you-are-thinking-about-serverless-costs-all-wrong/ “You are thinking about serverless costs all wrong” - @theburningmonk
46. https://forrestbrazeal.com/2020/01/05/code-wise-cloud-foolish-avoiding-bad-technology-choices/ “Code-wise, cloud-foolish: avoiding bad technology choices” - @forrestbrazeal
47. Determining the Total Cost of Ownership of Serverless Technologies when compared to Traditional Cloud
48. Resources ServerlessDays Belgium - Meetup Edition #1 YouTube - Join the meetup Presentations - Serverless - Lessons Learned - Nike Brown Bag