eXtreme Serverless Azure Data, Compute, Realtime - in Action! Christian Weyer @christianweyer CTO 

2 § Founder & CTO at Thinktecture AG § Personal focus on § Mobile & web-based application architectures § Interoperability, cross-device § Pragmatic end-to-end solutions § Cloud-native & serverless architectures § Independent Microsoft Regional Director § Microsoft MVP for ASP.NET (Architecture) ASPInsider, AzureInsider § Google GDE for Web Technologies § [email protected] § ! @christianweyer Christian Weyer Data, Compute, Realtime - in Action! eXtreme Serverless Azure 

3 § Microservices, Nanoservices § Serverless in Azure § Azure Functions § Azure Cosmos DB § Azure SignalR Service eXtreme Serverless Azure Data, Compute, Realtime - in Action! Topics 

4 How ‘large’ is ‘small’? Microservices Data, Compute, Realtime - in Action! eXtreme Serverless Azure 

5 § Modern business applications architectures: we strive for isolating functional services § Choice of technology, use best communication means § Microservice: unit of independent deployment for a business domain-specific service § Nanoservice: like Microservice, but more focused & lightweight; can be replaced easier § Functions as the mental model § Make things easier, get productive eXtreme Serverless Azure Data, Compute, Realtime - in Action! Microservices – or rather: Nanoservices ! 

6 A different approach Serverless Data, Compute, Realtime - in Action! eXtreme Serverless Azure 

7 § We can choose from a continuum § VM ➔ § Containers ➔ § Orchestrators ➔ § PaaS ➔ § Serverless eXtreme Serverless Azure Data, Compute, Realtime - in Action! Evolution to Cloud Compute Continuum PaaS IaaS On-Premises Serverless 

8 What is Serverless, anyway? Data, Compute, Realtime - in Action! eXtreme Serverless Azure 

9 § Serverless Compute → Azure Functions § Serverless Database → Azure Cosmos DB § Serverless Storage → Azure Storage § Serverless Realtime → Azure SignalR Service § Serverless Events → Azure Event Grid § Serverless Messaging → Azure Service Bus § Serverless Workflows → Azure Logic Apps Azure Durable Functions § Serverless IoT → Azure IoT Hub § Serverless Analytics → Azure Application Insights § Serverless Containers → Azure Container Instances Data, Compute, Realtime - in Action! Serverless in Azure eXtreme Serverless Azure 

10 eXtreme Serverless Azure Data, Compute, Realtime - in Action! There are NO servers! https://twitter.com/jeffhollan/status/1030244102082682880 

11 eXtreme Serverless Azure Data, Compute, Realtime - in Action! Sample Architecture 

12 Azure Functions Serverless Code / Compute Data, Compute, Realtime - in Action! eXtreme Serverless Azure 

13 § Azure Functions is code being triggered by an event § Focused code + events § Basic principles enable powerful use cases § Events § Triggers § Bindings § Two ways of operation § Cost-optimized, automatic scale (aka Consumption Plan) § Always-on § V2 Runtime built on .NET Core § Available for e.g. self-hosting Data, Compute, Realtime - in Action! Azure Functions: Functions-as-a-Service eXtreme Serverless Azure 

14 § Incoming event triggers function § Input bindings enable easy access to data from various data sources § Output bindings offer easy access to outbound data sinks Data, Compute, Realtime - in Action! Triggers & Bindings eXtreme Serverless Azure Your code logic Runtime Azure Function HTTP Trigger Storage Input Binding Push Notification Output Binding Database Output Binding Email Output Binding Example 

15 Data, Compute, Realtime - in Action! Triggers & Bindings in Code eXtreme Serverless Azure 

16 § In portal, via CLI, or in IDE § Visual Studio wizards for pre-compiled Functions § Local tooling & runtime available § Debugging locally or remote § Multiple language bindings supported § C# & C# Script (CSX) § F# § JavaScript, TypeScript (node.js) § Java (preview) Data, Compute, Realtime - in Action! Developing Functions eXtreme Serverless Azure 

17 Data, Compute, Realtime - in Action! eXtreme Serverless Azure https://docs.microsoft.com/en-us/azure/azure-functions/functions-triggers-bindings Triggers & Bindings 

18 Azure Cosmos DB Serverless Database Data, Compute, Realtime - in Action! eXtreme Serverless Azure 

19 § Globally distributed, elastically scalable § Fully managed by Azure § But not yet fully automatically scaling § Pricing not (yet?) suitable for low-entry projects § Multi-model database § Key-value, document, graph ➔ NoSQL § Multiple APIs § DocumentDB, with SQL & JS APIs § MongoDB API § Cassandra API § Table Storage API § Graph Database with Gremlin API Data, Compute, Realtime - in Action! Cosmos DB: A Database with Many Faces eXtreme Serverless Azure 

20 § Building event-driven architectures with Cosmos DB § Listening to Azure Cosmos DB collection for any changes § Inserts, updates, soft-deletes § Subscribe to collection changes § Can be used as a trigger for Azure Functions Data, Compute, Realtime - in Action! Cosmos DB Change Feed eXtreme Serverless Azure 

21 Serverless Realtime Azure SignalR Service Data, Compute, Realtime - in Action! eXtreme Serverless Azure 

22 § Realtime is a wanted feature nowadays § Dashboards and monitoring apps § Collaborative apps § Apps that require notifications § ASP.NET Core SignalR provides programming model for bi-directional ‘method invocation’ – via WebSockets, SSE or Long Polling § Wanted: “SignalR messaging & scale-out”-as-a-Service ➔ Azure SignalR Service § Azure Functions bindings available (in preview) eXtreme Serverless Azure Data, Compute, Realtime - in Action! Azure SignalR Service 

23 eXtreme Serverless Azure Data, Compute, Realtime - in Action! Azure SignalR Service & Azure Functions 

24 Summary Data, Compute, Realtime - in Action! eXtreme Serverless Azure 

25 § Serverless is just one option in the Cloud Continuum § Always think about the use cases and requirements § Serverless will be pre-dominant on the ‘server’ in a couple of years § Event-driven thinking & modeling of services & interfaces feels like a natural approach to systems design § Serverless Azure tries to offer solutions in the Cloud Continuum § Functions § Cosmos DB § SignalR Service § Event Grid … & more § Azure Functions is way more than just a Web API framework Summary Data, Compute, Realtime - in Action! eXtreme Serverless Azure 

26 Christian Weyer, Thinktecture AG @christianweyer [email protected] Data, Compute, Realtime - in Action! eXtreme Serverless Azure https://github.com/thinktecture/extreme-serverless-demo 

27 § Processing 100,000 Events Per Second on Azure Functions § https://blogs.msdn.microsoft.com/appserviceteam/2017/09/19/processing- 100000-events-per-second-on-azure-functions/ § Azure Functions – Significant Improvements in HTTP Trigger Scaling § https://www.azurefromthetrenches.com/azure-functions-significant- improvements-in-http-trigger-scaling/ § Azure Functions: Cold Starts in Numbers § https://mikhail.io/2018/04/azure-functions-cold-starts-in-numbers/ eXtreme Serverless Azure Data, Compute, Realtime - in Action! Interesting reading 

28 § Azure Functions Dependency Injection (with AutoFac) § https://github.com/introtocomputerscience/azure-function-autofac- dependency-injection eXtreme Serverless Azure Data, Compute, Realtime - in Action! Resources