Getting Started with Serverless Architectures using Azure Functions @ TechDays 2017

The presentation I gave at TechDays 2017 in Amsterdam.
First, the concepts of serverless architectures are explained. Then Azure Functions is introduced. The corresponding demo code can be found at https://github.com/marcduiker/demos-serverless-architectures-functions.

Transcript

1. Getting Started with Serverless Architectures using Azure Functions MARC DUIKER
2. Marc Duiker Lead Consultant Xpirit Netherlands @marcduiker – mduiker@xpirit.com
3. Current situation Client PlaceOrder Search ValidateOrder CalculatePrice Orders Products Prices
4. Current situation - Problems Client PlaceOrder Search ValidateOrder CalculatePrice Orders Products Prices Expensive infrastructure Performance issues Teams require synced delivery
5. POC to redesign – Conditions & Requirements Client PlaceOrder Search ValidateOrder CalculatePrice Orders Products Prices Uneven & spikey workload 2 weeks Limited budget Fault tolerant Independent delivery
8. What are serverless architectures?
9. 1. Application that fully depends on a 3rd party service in the cloud to manage logic and state. Multiple interpretations for Serverless
10. 2. Application where some code is written by the developer but is run in stateless compute containers that are event-triggered, short lived and fully managed by a 3rd party. Multiple interpretations for Serverless
11. • Serverless is a misleading term • Functions as a Service (FaaS) is better “Serverless”
12. Traditional n-tier architecture Client PlaceOrder Search ValidateOrder CalculatePrice Orders Products Prices
13. Serverless architecture with FaaS Client PlaceOrder Gateway Search Validate Order Calculate Price Temp Storage Perm Storage Products Prices
14. Why a serverless architecture?
15. What we all want • A responsive application • Regardless of workload • Regardless of failures
16. Solution: Reactive Systems Responsive Message driven Resilient Elastic https://www.reactivemanifesto.org/ FaaS enables Reactive Systems
17. Serverless architecture with FaaS Client Temp Storage Gateway Search Products PlaceOrder Perm Storage Calculate Price Prices Validate Order
18. Serverless architecture with FaaS Client Temp Storage Gateway Search Products PlaceOrder Perm Storage Calculate Price Prices Validate Order
19. Benefits of FaaS • Focus on code instead of servers & runtime • Node.js , Python, C#, Java … • Reduced operational costs • Allows easier experimentation • Shorter time to market
20. Benefits of FaaS • Consumption based pricing • Resource consumption & number of executions # Executions / month 2m Time / execution 0.5 sec Time consumption 2m * 0.5 = 1m sec Avg memory consumption 1.5 GB Resource consumption 1.5 * 1m = 1.5m GB-s Resource price* 0.000014 Eur / GB-s Resource costs 1.5m * 0.000014 = 21 EUR Execution price* 0.169 EUR/1m executions Execution costs 2m * 0.169 = 0.34 EUR *Based on Azure Functions consumption plan dd 11 Oct 2017 2 1
21. Benefits of FaaS • Automatic scaling • Can reduce compute costs for spikey workloads constant spikey
22. Disadvantages of FaaS • Learning curve • Limited execution duration • Startup latency • Development tooling
23. FaaS offerings AWS Lambda (2014) Google Cloud Functions (2016) Azure Functions (2016)
24. How do Azure Functions fit in?
25. What is Azure Functions? “Azure Functions is a serverless compute service that enables you to run code on-demand without having to explicitly provision or manage infrastructure.” https://docs.microsoft.com/en-us/azure/azure-functions/
26. What is Azure Functions?
27. Function Anatomy: Triggers & Bindings Input Output Trigger Code 1 0-n 0-n Function
28. Function Anatomy: Function App Input Output Trigger Code Function Function App Settings
29. The rise of the Functions WebJobs Functions
30. Differences with WebJobs • Seamless integration with Azure services • Azure Storage (Queues, Blobs) • Service Bus (Queues, Topics) • CosmosDB • Event Hubs • Webhooks • Timer • Consumption based pricing • Improved automatic scaling
31. Automatic scaling
32. Azure Functions Limitations • Max execution duration: 10 min (default 5 min) • Available memory: 1.5 GB
33. Developing Azure Functions
34. • Function scripts - Directly in the portal - Visual Studio Code • Compiled Functions - Visual Studio 2017 with Azure Function Tools Developing Functions
35. Demo: Developing Function Scripts
36. Benefits of Compiled Functions: • Enjoy the VS IDE features • Local debugging • Easier package management • Configure CI/CD pipelines • Reduce cold start time Developing in Visual Studio
37. Demo: Developing Compiled Functions
38. User uploads image Image requires validation Image needs to be analyzed Analysis result need to be stored Use case
39. Solution using Azure Functions & Queues images input images to analyze images too large analysis results to store validate analyze store blob DB
40. Solution using Azure Functions & Queues Upload images images input images to analyze images too large analysis results to store validate analyze store blob DB
41. Solution using Azure Functions & Queues Validate images images input images to analyze images too large analysis results to store validate analyze store blob DB
42. Solution using Azure Functions & Queues Analyze images images input images to analyze images too large analysis results to store validate analyze store blob DB
43. Solution using Azure Functions & Queues Store analysis data images input images to analyze images too large analysis results to store validate analyze store blob DB
44. Solution using Azure Functions & Queues Scope of the demo images input images to analyze images too large analysis results to store validate analyze store blob DB
45. Demo: Multiple Functions in one App
46. Demo data
47. Solution using Azure Functions & Queues Start situation images input images to analyze images too large analysis results to store validate analyze store blob DB 3 3
48. Solution using Azure Functions & Queues End situation images input images to analyze images too large analysis results to store validate analyze store blob DB 3 1 2
49. Demo: Doing the magic
50. ✓ Develop function using the Azure portal ✓ Develop function using Visual Studio ✓ Multiple functions in one Function App ✓ Microsoft Azure Storage Explorer ✓ Function App Logs Developing Functions Demos
51. Deploying Azure Functions
52. Edit & save scripts in Portal Publish from Visual Studio Deploy straight from source control Deploy from VSTS Deploying Functions
53. Demo: Deploying Functions
54. ✓ Configure deployment using Azure Portal ✓ Configure deployment using VSTS Deploying Functions Demos
55. Other scenarios
56. Currently you need to provide a message queue to chain functions. Function Chaining & Durable Functions
57. Function Chaining & Durable Functions https://azure.github.io/azure-functions-durable-extension/ Durable Functions will use Orchestrator and Action functions making it easier for developers to chain functions.
58. Use Functions as Actions Functions & Logic Apps
59. Use an API gateway to manage your Functions API Gateway Client PlaceOrder Search Validate Calculate Temp Storage Perm Storage Products Gateway
61. Marc Duiker Lead Consultant Xpirit Netherlands @marcduiker – mduiker@xpirit.com Go and discover endless possibilities with Azure Functions! https://github.com/marcduiker/ demos-serverless-architectures-functions/