When and how to use (or not use) Amazon Web Services for .NET developers. FaaS and Serverless on AWS

1. FaaS on AWS
for .NET developers
Taras Romanyk
.NET Technical Lead

2. What is Serverless?
 Run code without
managing operating
system
 Horizontal scaling
 Reduce operation cost
 Reduce development cost
 Improved Latency and
Geolocation
 No specific framework
 Limited in execution
duration
 Startup latency and “cold
starts”
 Multitenancy problems

3. What isn’t Serverless?
 PaaS
 Containers
 Stored Procedure as a Service

4. Platforms
 Azure Functions
 Amazon - AWS Lambda Functions
 Google Cloud Functions
 IBM Cloud Functions (based on Apache OpenWhisk)
 Oracle Cloud Fn
 Alibaba - Function Compute

5. How to start
 AWS Free Tier
12 month free
Always free
 Setup a billing alert

6. Supported languages & platforms
 Node.js (4.3/6.10/8.10)
 Python (2.7/3.6)
 Java (8)
 .NET Core 1.0/.NET Core 2.0
 Go (1.x)

7. We are using...
 Node.js (4.3/6.10/8.10)
 Python (2.7/3.6)
 Java (8)
 .NET Core 1.0/.NET Core 2.0
 Go (1.x)

8. Lambda execution model
 Synchronous (push)
 Asynchronous (event)
 Stream-based

9. Use cases

10. AWS integrations
 18 geographic Regions + 4 in progress
 98 services

11. AWS Lambda Limitation
 3008 MB allocated CPU
 5 min execution

12. Step functions
Orchestrate AWS Lambda functions

13. Pitfalls: cold start
 Warm in background
 Warm with CloudWatch
 JavaScript, Python
 Remove access to VPC

14. Pitfalls: price for API Gateway

15. How to code on Python
 Boto 3
 Moto: Mock AWS Services
 LocalStack
 Placebo
 Cloud9

16. AWS SDK for .NET
 AWS SDK for .NET
 AWS SDK for Unity
 AWS SDK for Xamarin

17. AWS Toolkit for Visual Studio
 AWS Lambda Project (.NET Core)
 AWS Serverless Application (.NET Core)
 NodeJS

18. Pitfall: bad design

19. AWS Serverless Application (.NET Core)
 CloudFormation
 SAM (Serverless Application Model)
 Xunit
 YAML/JSON

20. Deployment
 All at once
 Blue/Green
 Canaries/Linear

21. Q&A
 Taras Romanyk
 http://rredcat.blogspot.com/
 rredcat@gmail.com
 https://www.linkedin.com/in/rredcat/