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Azure in Action: Pragmatische Cloud-Lösungen mit Containern & Serverless Christian Weyer @christianweyer CTO Thorsten Hans @ThorstenHans Consultant

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2 § Co-Founder & CTO at Thinktecture AG § Personal focus on § Mobile & web-based application architectures § Pragmatic end-to-end solutions § Cloud-native & serverless architectures § Independent Microsoft Regional Director § Microsoft MVP for Visual Studio Tools & Development ASPInsider, AzureInsider § Google GDE for Web Technologies § [email protected] § @christianweyer Christian Weyer Azure in Action Pragmatische Cloud-Lösungen mit Containern & Serverless

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§ Consultant at Thinktecture AG § Personal focus on § Container technologies § Cloud-native & Serverless architectures § Infrastructure-as-Code § Microsoft MVP for Visual Studio Tools & Development § [email protected] @ThorstenHans § www.thinktecture.com thorsten-hans.com thns.io/slides Thorsten Hans Azure in Action Pragmatische Cloud-Lösungen mit Containern & Serverless 3

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4 Pragmatische Cloud-Lösungen mit Containern & Serverless Azure in Action Topics Morning Containers & Orchestrators Afternoon Serverless

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5 § We can choose from a continuum § VM ➔ § Containers ➔ § Orchestrators ➔ § PaaS ➔ § Serverless Pragmatische Cloud-Lösungen mit Containern & Serverless Azure in Action Evolution to Cloud Compute Continuum PaaS IaaS On-Premises Serverless

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6 Azure in Action Pragmatische Cloud-Lösungen mit Containern & Serverless IaaS

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7 The other Cloud Azure Azure in Action Pragmatische Cloud-Lösungen mit Containern & Serverless

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8 § Why Azure? § Look beyond one’s own nose § Microsoft has always been strong in the enterprise § It is no longer “Windows Azure” § >50% of VMs running on Linux (increasing) § Strong developer tooling § VS Code, anyone? § Breadth & depth offerings § Very broad availability worldwide Pragmatische Cloud-Lösungen mit Containern & Serverless Azure in Action Azure Cloud https://www.cbronline.com/news/aws-results-azure

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https://azure.microsoft.com/en-us/global-infrastructure/regions/ Azure in Action Pragmatische Cloud-Lösungen mit Containern & Serverless 9

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10 How ‘large’ is ‘small’? ‘Micro’ Services Azure in Action Pragmatische Cloud-Lösungen mit Containern & Serverless

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11 Pragmatische Cloud-Lösungen mit Containern & Serverless Azure in Action Bird’s-Eye-View Target Architectures HTTP API WS API Service D HTTPS HTTPS WebSocket Service A Service B Service C HTTP API

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Single Responsibility § Focused around business domain § ‘Small’ Isolation § Well-defined technology-agnostic API § Mobility § Choice of technology Autonomy § Exclusive state (data storage) Decoupling § Asynchronous communication § Really, always? Pragmatische Cloud-Lösungen mit Containern & Serverless Azure in Action (Some) Principles of Microservices 12

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13 Classic Microservices Containers & Orchestrators Azure in Action Pragmatische Cloud-Lösungen mit Containern & Serverless

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1. Web App for Containers 2. What is Azure Kubernetes Service 3. Azure Kubernetes Service 101 4. Integrating AKS with Azure Services Containers & Orchestrators - Talking Points Azure in Action Pragmatische Cloud-Lösungen mit Containern & Serverless 14

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Containers in Azure Web App for Containers Azure in Action Pragmatische Cloud-Lösungen mit Containern & Serverless 15

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A „migration“ path for building containerized apps § Well-known App Service environment § App Service Plan § Scale-in / Scale-out § Continuous Integration § Support for Windows (currently in open Preview) and Linux Containers Web App for Containers Azure in Action Pragmatische Cloud-Lösungen mit Containern & Serverless 16

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Web App for Containers DEMO Azure in Action Pragmatische Cloud-Lösungen mit Containern & Serverless 17

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What is AKS? Azure Kubernetes Service Azure in Action Pragmatische Cloud-Lösungen mit Containern & Serverless 18

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AKS § Managed Kubernetes cluster on Azure § AKS supports § Cluster auto-scaling § GPU enabled nodes § Development Tooling Integration (aka Azure DevSpaces) § Cost efficient § you pay ONLY for your worker nodes Azure Kubernetes Services Azure in Action Pragmatische Cloud-Lösungen mit Containern & Serverless 19

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Azure Kubernetes Services 1 Fully managed Kubernetes Master 2 Seamless Azure Integration 3 Simplified Cluster Operations Azure in Action Pragmatische Cloud-Lösungen mit Containern & Serverless 20

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Azure Kubernetes Service AKS 101 Azure in Action Pragmatische Cloud-Lösungen mit Containern & Serverless 21

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Using Azure CLI # Create a resource group az group create --name thh-demo --location westeurope --tags @{resp="THH"} # Create a Service Principal az ad sp create-for-rbac --name thh-demo-aks-sp --skip-assignment # Will print something like { "appId": "7248f250-0000-0000-0000-dbdeb8400d85", # --> identifier ($SP_ID) "displayName": "thh-demo-aks-sp", "name": "http://thh-demo-aks-sp", "password": "77851d2c-0000-0000-0000-cb3ebc97975a", # --> client secret ($SP_PWD) "tenant": "72f988bf-0000-0000-0000-2d7cd011db47“ } Prepare a new AKS Cluster Azure in Action Pragmatische Cloud-Lösungen mit Containern & Serverless 22

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Using Azure CLI # Create a AKS Cluster az aks create --name thh-demo-aks --resource-group thh-demo --location westeurope --service-principal $SP_ID --client-secret $SP_PWD --node-count 3 --node-vm-size Standard_DS1_v2 --tags @{responsible=“Thorsten Hans"} Create a new AKS Cluster Azure in Action Pragmatische Cloud-Lösungen mit Containern & Serverless 23

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Using Azure CLI # Scale-Out an AKS Cluster (increase Node count to 5) az aks scale --name thh-demo-aks --resource-group thh-demo --node-count 5 Scale-Out an AKS Cluster Azure in Action Pragmatische Cloud-Lösungen mit Containern & Serverless 24

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Using Azure CLI # Scale-In an AKS Cluster (reduce Node count to 1) az aks scale --name thh-demo-aks --resource-group thh-demo --node-count 1 Scale-In an AKS Cluster Azure in Action Pragmatische Cloud-Lösungen mit Containern & Serverless 25

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Using Azure CLI # Get current k8s version az aks get-upgrades --name thh-demo-aks --resource-group thh-demo --output table # Name ResourceGroup MasterVersion NodePoolVersion Upgrades # ------- --------------- --------------- ----------------- -------------- # thh... thh-demo 1.10.9 1.10.9 1.10.12, 1.10.13 Get AKS Cluster Upgrades Azure in Action Pragmatische Cloud-Lösungen mit Containern & Serverless 26

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Using Azure CLI # Start k8s upgrade az aks upgrade --name thh-demo-aks --resource-group thh-demo --kubernetes-version 1.10.13 Upgrade an AKS Cluster Azure in Action Pragmatische Cloud-Lösungen mit Containern & Serverless 27

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Azure Services Integrating AKS Azure in Action Pragmatische Cloud-Lösungen mit Containern & Serverless 28

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Integrating AKS with Azure Services 1 Container Registry 2 Storage 3 Container Instances 4 Key Vault 5 Analytics Azure in Action Pragmatische Cloud-Lösungen mit Containern & Serverless 29

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Consume private images § Pull Docker images from ACR § Authentication done via Service Principal § Grant Reader permissions to AKS’s underlying SP for ACR Azure Container Registry Azure in Action Pragmatische Cloud-Lösungen mit Containern & Serverless 30

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Using Azure CLI # Get ACR Identifier az acr show --name thhdemo --resource-group thh --query id # --> identifier ($ACR_ID) # Create Role Assignment for SP az role assignment create --assignee $SP_ID --role Reader --scope $ACR_ID Authenticate with ACR Azure in Action Pragmatische Cloud-Lösungen mit Containern & Serverless 31

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Use persistent volumes § Support for Azure Disks and Azure Files § Static consumption § Storage is attached to Cluster and app developer uses it (eg in a Pod) § Dynamic consumption § Cluster knows how to dynamically create Azure Disks or Azure Files Shares Azure Storage Account Azure in Action Pragmatische Cloud-Lösungen mit Containern & Serverless 32

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Scale cluster dynamically and support hybrid workloads § Deploy Pods to ACI § Execute both Windows and Linux containers § Feels like one or more native k8s node § Implemented using Virtual Kubelet Azure Container Instances Azure in Action Pragmatische Cloud-Lösungen mit Containern & Serverless 33

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Extend AKS using a virtual-kubelet # Start k8s upgrade az aks install-connector --name thh-demo-aks --resource-group thh-demo --connector-name virtual-kubelet --aci-resource-group thh-demo --service-principal $SP_ID --client-secret $SP_PWD --os-type Windows Azure Container Instances Azure in Action Pragmatische Cloud-Lösungen mit Containern & Serverless 34

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Keep sensitive data secured § Consume secrets, keys and certificates from a secured resource § Final, native integration for Key Vault and competitors not yet landed in k8s § Two different integration scenarios available § Authenticate via Client-Id and –Secret from within an application component § Use AAD to generate an Pod Identity (think of MSI) § Best solution … for NOW Azure Key Vault Azure in Action Pragmatische Cloud-Lösungen mit Containern & Serverless 35

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All Insights at one place § Use Application Insights to collect application logs § Use Log Insights to collect infrastructure logs § Seamless integration of Log Insights for AKS § Centralized experience in Azure Monitor Azure Monitor Azure in Action Pragmatische Cloud-Lösungen mit Containern & Serverless 36

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Enable Monitoring Add-on to stream logs to Azure Monitor # Enable Monitoring Add-on on AKS az aks enable-addons --name thh-demo-aks --resource-group thh-demo --addons monitoring --workspace-resource-id $WS_R_ID Azure Log Insights Azure in Action Pragmatische Cloud-Lösungen mit Containern & Serverless 37

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38 § We can choose from a continuum § VM ➔ § Containers ➔ § Orchestrators ➔ § PaaS ➔ § Serverless Pragmatische Cloud-Lösungen mit Containern & Serverless Azure in Action Evolution to Cloud Compute Continuum PaaS IaaS On-Premises Serverless

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39 A different approach to Microservices Serverless Azure in Action Pragmatische Cloud-Lösungen mit Containern & Serverless

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40 § We strive for isolating functional services § Choice of technology, use best fitting 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 § Basic idea: make things easier, get productive with business, not infrastructure Pragmatische Cloud-Lösungen mit Containern & Serverless Azure in Action Microservices – or rather: Nanoservices

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Pragmatische Cloud-Lösungen mit Containern & Serverless Azure in Action Sample Architecture – Shopping Order Monitoring 41

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Pragmatische Cloud-Lösungen mit Containern & Serverless Azure in Action Sample Architecture – Shopping Order Monitoring Orders Service Products Service Shipping Service AuthN Service Order Monitoring SPA Shopping Web Site (simulated by Postman) 1 - authenticate 2 - register for push 3 - send new order 5 - new order created push 6 - get updated orders 4 - processing order… 42

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43 Pragmatische Cloud-Lösungen mit Containern & Serverless Azure in Action Serverless Sweet Spot Programming Model (FaaS) § Event-driven § Stateless § Service-full Operational Model § Fully managed § Automatically scaling § Usage priced

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44 Pragmatische Cloud-Lösungen mit Containern & Serverless Azure in Action Typical Serverless attributes

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45 § Serverless Compute → Azure Functions § Serverless SQL Database → Azure SQL Database Serverless § Serverless NoSQL 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 Pragmatische Cloud-Lösungen mit Containern & Serverless Azure in Action Serverless in Azure (my personal choice)

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46 Pragmatische Cloud-Lösungen mit Containern & Serverless Azure in Action There are NO servers! https://twitter.com/jeffhollan/status/1030244102082682880

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Pragmatische Cloud-Lösungen mit Containern & Serverless Azure in Action Sample Architecture – Shopping Order Monitoring: Serverless Orders Service Products Service Shipping Service AuthN Service Order Monitoring SPA Shopping Web Site (simulated by Postman) Azure Function App – C# Azure Function App - C# Azure Function App - JS Azure Function App - Java Azure Service Bus Azure Blob Storage Azure SignalR Service Azure Table Storage Azure Cosmos DB Identity Server 47

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48 Azure Storage & Cosmos DB Serverless Data Azure in Action Pragmatische Cloud-Lösungen mit Containern & Serverless

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49 § Blob § Highly scalable storage for arbitrary data § Can host static websites § Integrated with Event Grid § Files: fully managed cloud file shares § Sync § SMB, HTTPS § Table § Very simple schemaless table storage § Highly scalable § Needs thorough upfront design of data structures Pragmatische Cloud-Lösungen mit Containern & Serverless Azure in Action Azure Storage

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Pragmatische Cloud-Lösungen mit Containern & Serverless Azure in Action Sample Architecture – Shopping Order Monitoring: Serverless Orders Service Products Service Shipping Service AuthN Service Order Monitoring SPA Shopping Web Site (simulated by Postman) Azure Function App – C# Azure Function App - C# Azure Function App - JS Azure Function App - Java Azure Service Bus Azure Blob Storage Azure SignalR Service Azure Table Storage Azure Cosmos DB Identity Server 50

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51 § 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 § Multiple APIs § DocumentDB, with SQL & JS APIs § MongoDB API § Cassandra API § Table Storage API § Graph Database with Gremlin API Azure in Action Cosmos DB: A NoSQL Database with Many Faces Pragmatische Cloud-Lösungen mit Containern & Serverless

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Pragmatische Cloud-Lösungen mit Containern & Serverless Azure in Action Sample Architecture – Shopping Order Monitoring: Serverless Orders Service Products Service Shipping Service AuthN Service Order Monitoring SPA Shopping Web Site (simulated by Postman) Azure Function App – C# Azure Function App - C# Azure Function App - JS Azure Function App - Java Azure Service Bus Azure Blob Storage Azure SignalR Service Azure Table Storage Azure Cosmos DB Identity Server 52

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53 § Building event-driven architectures with Cosmos DB § Listening to Azure Cosmos DB collection for any changes § Inserts, updates, soft-deletes § Subscribe to collection changes Azure in Action Cosmos DB Change Feed Pragmatische Cloud-Lösungen mit Containern & Serverless

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54 Azure Functions Serverless Compute Azure in Action Pragmatische Cloud-Lösungen mit Containern & Serverless

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55 § Azure Functions: Code being triggered by an event § Basic principles enable powerful use cases § Events ➔ Triggers § Bindings § Various ways of operation § Cost-optimized, automatic scale (aka Consumption Plan) § Always-on § V2 Runtime built on .NET Core § Available for e.g. self-hosting § Local tooling & runtime available § Multiple language bindings supported Azure in Action Azure Functions: Functions-as-a-Service Pragmatische Cloud-Lösungen mit Containern & Serverless

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Pragmatische Cloud-Lösungen mit Containern & Serverless Azure in Action Sample Architecture – Shopping Order Monitoring: Serverless Orders Service Products Service Shipping Service AuthN Service Order Monitoring SPA Shopping Web Site (simulated by Postman) Azure Function App – C# Azure Function App - C# Azure Function App - JS Azure Function App - Java Azure Service Bus Azure Blob Storage Azure SignalR Service Azure Table Storage Azure Cosmos DB Identity Server 56

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57 § Cold vs. warm start Pragmatische Cloud-Lösungen mit Containern & Serverless Azure in Action Azure Functions: Activation & Scaling in Consumption Plan https://blogs.msdn.microsoft.com/appserviceteam/2018/02/07/understanding-serverless-cold-start/

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58 § Incoming event triggers function § Input bindings enable easy access to data from various data sources § Output bindings offer easy access to outbound data sinks Azure in Action Triggers & Bindings Pragmatische Cloud-Lösungen mit Containern & Serverless Your code logic Runtime Azure Function HTTP Trigger Storage Input Binding Push Notification Output Binding Database Output Binding Email Output Binding Example

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59 Azure in Action Triggers & Bindings in Code Pragmatische Cloud-Lösungen mit Containern & Serverless

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60 Azure in Action Pragmatische Cloud-Lösungen mit Containern & Serverless https://docs.microsoft.com/en-us/azure/azure-functions/functions-triggers-bindings Triggers & Bindings

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61 Azure Service Bus Serverless Messaging Azure in Action Pragmatische Cloud-Lösungen mit Containern & Serverless

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62 § Asynchronous communication for decoupling Microservices § Different messaging services in Azure § Events, messages, data points § Event Grid § Primary use case: Reactive programming § Service Bus § Primary use case: Enterprise-grade messaging § Event Hubs § Primary use case: Big data streams Pragmatische Cloud-Lösungen mit Containern & Serverless Azure in Action Communication is key to Cloud Architectures

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63 § Fully-managed centralized event routing service § Simplifies development of event-based applications § Simplifies creation of serverless workflows § Supports direct event filtering using event type, prefix or suffix § Your application will only need to receive the events you care about § Same underlying model for different use-cases § System-provided events § Custom application-specific events Azure in Action Reactive Programming: Event Grid Pragmatische Cloud-Lösungen mit Containern & Serverless

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64 § Queues & Topics § Reliable asynchronous communication § Rich features for temporal control § Routing and filtering § Transactions § Convoys & Sessions (related messages with state) Pragmatische Cloud-Lösungen mit Containern & Serverless Azure in Action Service Bus: Messaging-as-a-Service

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65 Sender § Sender sends message to queue § Queue ACKs receipt § Receiver connects to queue & retrieves message § Receiver ACKs complete (or other action) Service Bus Queues Azure in Action Pragmatische Cloud-Lösungen mit Containern & Serverless Receiver

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Pragmatische Cloud-Lösungen mit Containern & Serverless Azure in Action Sample Architecture – Shopping Order Monitoring: Serverless Orders Service Products Service Shipping Service AuthN Service Order Monitoring SPA Shopping Web Site (simulated by Postman) Azure Function App – C# Azure Function App - C# Azure Function App - JS Azure Function App - Java Azure Service Bus Azure Blob Storage Azure SignalR Service Azure Table Storage Azure Cosmos DB Identity Server 66

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67 § Sender only knows about Topic § Receivers only know about Subscriptions § Filters and Actions exist on Subscriptions Pragmatische Cloud-Lösungen mit Containern & Serverless Azure in Action Service Bus Topics & Subscriptions Type == ‘order‘ Sender type=order type=quote Topic Type == ‘quote‘ Filter Filter Subscrip- tion 1 Subscrip- tion 2

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68 Azure SignalR Service Serverless Realtime Azure in Action Pragmatische Cloud-Lösungen mit Containern & Serverless

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69 § Realtime messaging 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 for accessing Hubs Pragmatische Cloud-Lösungen mit Containern & Serverless Azure in Action Azure SignalR Service

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Pragmatische Cloud-Lösungen mit Containern & Serverless Azure in Action Sample Architecture – Shopping Order Monitoring: Serverless Orders Service Products Service Shipping Service AuthN Service Order Monitoring SPA Shopping Web Site (simulated by Postman) Azure Function App – C# Azure Function App - C# Azure Function App - JS Azure Function App - Java Azure Service Bus Azure Blob Storage Azure SignalR Service Azure Table Storage Azure Cosmos DB Identity Server 70

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Azure Functions Extensibility Custom Bindings & Triggers Azure in Action Pragmatische Cloud-Lösungen mit Containern & Serverless 71

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72 § Connecting your own data sources and data sinks to Azure Functions § Beyond available bindings & triggers § E.g. build input binding for your own ERP system § Or… SQL Server § E.g. provide output binding for Web Push protocol (used in PWAs) Pragmatische Cloud-Lösungen mit Containern & Serverless Azure in Action Azure Functions Custom Bindings & Triggers

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73 § Custom Input and Outputs bindings possible § Must be implemented with .NET Core and C# § Can be used with other languages and runtimes § Three major parts § Attribute § One or more converters § Configuration Pragmatische Cloud-Lösungen mit Containern & Serverless Azure in Action Custom Bindings

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74 § Currently gray area: Not really supported, but possible to build § May not work in consumption plan § May not scale in consumption plan § May not work in any plan, actually… § But they work in Docker (of course) § Implement ITriggerBinding Pragmatische Cloud-Lösungen mit Containern & Serverless Azure in Action Custom Triggers

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75 Wrapping up Serverless Azure in Action Pragmatische Cloud-Lösungen mit Containern & Serverless

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Single Responsibility § Focused around business domain § ‘Small’ unit ➡ Dedicated Azure Functions App ➡ Dedicated Azure DevOps Pipeline Isolation § Choice of technology ➡ .NET, Java, node.js, Python supported § Well-defined technology-agnostic APIs ➡ HTTPS, AMQP, MQTT, custom § Mobility ➡ Portable runtime ➡ Can use Docker, k8s with Functions ➡ Easily deploy & run in Cloud Autonomy § Exclusive state (data storage) ➡ Use separate Azure Storage, Azure SQL, Azure CosmosDB instances Decoupling § Asynchronous communication ➡ Azure Service Bus with queues or topics & subscriptions Pragmatische Cloud-Lösungen mit Containern & Serverless Azure in Action (Some) Principles of Microservices – with Serverless Azure 76

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77 § Greenfield projects (but consider cold starts) § Integration use cases - the glue § Dissecting a monolith - isolate business functionality Pragmatische Cloud-Lösungen mit Containern & Serverless Azure in Action When to use Serverless Azure

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78 Summary Azure in Action Pragmatische Cloud-Lösungen mit Containern & Serverless

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79 § Container technologies provide § a soft migration path to the cloud § a unified deployment model § AKS integrates perfectly with Azure Services § AKS scales dynamically depending on your needs § 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 § Azure Functions is way more than just a Web API framework Summary Azure in Action Pragmatische Cloud-Lösungen mit Containern & Serverless

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Azure in Action: Pragmatische Cloud-Lösungen mit Containern & Serverless Christian Weyer @christianweyer [email protected] Thorsten Hans @ThorstenHans [email protected] https://github.com/thorstenhans/aks-demo-app https://github.com/thinktecture/serverless-microservices https://github.com/thinktecture/azure-functions-extensibility