Application modernization with azure PaaS and FaaS
- 2. Dileepa Rajapaksa Partner Technical Specialist at Rhipe Microsoft Most Valuable Professional - MVP Microsoft Certified Trainer – MCT Microsoft Certified Azure Solution Architect Twitter @dsrajapaksa LinkedIn https://www.linkedin.com/in/dsrajapaksa
- 3. ▪Defining digital transformation and cloud journey ▪Different strategies to move to the cloud ▪Migration vs. Modernization ▪Using PaaS services in Azure – Azure App Services ▪Using FaaS services in Azure – Azure Functions Session Outline
- 4. ▪ If there’s one constant your business can rely on these days, it’s change ! ▪ Innovation is the only way to survive competition. ▪ Modern IT infrastructure is the foundation for a successful organization. ▪ Innovate more quickly develop secure, scalable apps with new services on cloud. ▪ Collaborate more effectively, both internally and with externally. Digital Transformation and the cloud Journey
- 5. The journey to the cloud “Lift and shift” 90’s “Cloud Native Modernization”
- 6. Why move to the cloud? ▪ High availability. ▪ Scalability. ▪ Elasticity. ▪ Agility. ▪ Fault tolerance. ▪ Disaster recovery. ▪ Global reach. ▪ Customer latency capabilities. ▪ Predictive cost considerations. ▪ Increased productivity. ▪ Security. ▪ Low OPEX cost over CAPEX.
- 7. Moving to the cloud is a business decision ! Migration/modernization of existing applications might seem like a technical decision, but its core is business related. Ultimately, it raises two fundamental questions: ▪ What’s driving your business to move to the cloud? ▪ What it the organization’s long-term growth strategy ? ▪ Why moving to the cloud NOW?
- 8. Five categories of migration strategies
- 9. Cloud migration strategy depends on many factors: ▪What are your most pressing needs? ▪What are the skills of your team? ▪Where are your apps in the development lifecycle? ▪What software architecture/pattern currently being used?
- 10. Migration vs. Modernization Monolithic SOA Microservices Physical Servers VM Containers Waterfall Agile DevOps Architecture Infrastructure Delivery
- 11. Why modernize over migrate ? ▪ Accelerate your digital journey ▪ Faster time to market ▪ Improved user experience ▪ Optimized cost ▪ Achieve maximum productivity ▪ Forward-Looking ▪ Agility and faster feedback loop ▪ Maximize innovations !
- 12. Cost vs time of application modernization Cost/Effort Time to Migrate
- 13. What is Cloud Native ? ▪ All about changing the way you think about constructing critical business systems ▪ Designed to embrace rapid change, large scale, and resilience. ▪ Take full advantage of the cloud service model. ▪ Cloud native is much about speed and agility.
- 14. Cloud Native Computing Foundation Definition Cloud-native technologies empower organizations to build and run scalable applications in modern, dynamic environments such as public, private, and hybrid clouds. Containers, platform as a service offerings, microservices, immutable infrastructure, and declarative APIs exemplify this approach.
- 15. Success of Cloud Native Approach · 600+ services in production. Deploys hundred times per day. 1,000+ services in production. Deploys thousand times a week. 300+ services in production. Deploys 1,000 times a day.
- 17. Platform as a Service(PaaS) ▪ Simple way to deploy an app in a given technology. ▪ Simplifies deploying applications on your platform of choice. ▪ Deploy the app and the “cloud” will take care about how to run ▪ Can auto-scale the number of compute instances to handle workloads ▪ Save money during times of low usage. ▪ Impossible to install custom system dependencies. ▪ Somewhat similar to serverless computing.
- 18. Azure shared responsibility model Cloud Provider Manages On-Premises ( Private Cloud ) Compute Networking Storage Infrastructure ( as a Service ) Runtime Operating System Virtual Machine Compute Networking Storage Platform ( as a Service ) Applications Runtime Operating System Virtual Machine Compute Networking Storage Software ( as a Service )
- 19. App Service ▪Service for hosting web applications, REST APIs, and mobile backends. ▪Can be developed in many of the following languages. ▪Applications can execute and scale in a fully managed, sandbox environment. .NET Java Ruby Node.JS PHP Python
- 20. Web Apps ▪Scalable hosting for web applications: ▪ Provides a quick way to host your web application in the cloud ▪ Allows you to scale your web app without being required to redesign for scalability ▪ Integrates with Visual Studio ▪ Provides an open platform for many different programming languages ▪Advantages: ▪ Near instant deployment ▪ SSL and Custom Domain Names available in some tiers ▪ WebJobs provide background processing for independent scaling ▪ Can scale to larger machines without redeploying applications
- 21. Key features of App Service Web Apps ▪Multiple languages and frameworks: ▪ First-class support for Microsoft ASP.NET, Java, Ruby, Node.js, PHP, or Python ▪DevOps optimization: ▪ Continuous integration and deployment with Visual Studio Team Services, GitHub, Bitbucket, Docker Hub, or Azure Container Registry ▪Global scale with high availability: ▪ Scale up or out manually or automatically. Host anywhere in the Microsoft global datacenter infrastructure ▪Connections to SaaS platforms and on-premises data: ▪ More than 50 connectors for enterprise systems (such as SAP), SaaS services (such as Salesforce), and internet services (such as Facebook)
- 22. Key features of App Service Web Apps (cont.) ▪Security and compliance: ▪ App Service is ISO, SOC, and PCI compliant ▪Application templates: ▪ Templates in the Azure Marketplace, such as WordPress, Joomla, and Drupal ▪Visual Studio integration: ▪ Streamline the work of creating, deploying, and debugging ▪API and mobile features: ▪ Turn-key Cross-Origin Resource Sharing (CORS) support for RESTful API scenarios, and enables authentication, offline data sync, push notifications, and more ▪Serverless code: ▪ Run code on-demand without having to explicitly provision or manage infrastructure
- 23. App Service plans ▪App Service plans can logically group apps within a subscription: – Characteristics such as features, capacity, and tiers are shared among the website instance in the group – The App Service plan is the unit of billing in most cases ▪Multiple App Service plans can exist in a single Resource Group and multiple apps can exist in a single App Service plan
- 24. App Service plans (continued) App Service plan
- 25. Deployment slots ▪ Live apps with their own: Host names Content Configuration ▪ Can be swapped between each other. Staging ⬌ Production Production ⬌ Staging Dev ⬌ Test Test ⬌ QA QA ⬌ Staging Staging Production swappable QA Test Dev
- 26. Modern deployment workflow GitHub master branch Dev feature branch Staging Production merge Web API swap swap
- 27. Function as a Service (FaaS)/ Serverless ▪ Even simpler than PaaS ▪ Based on the functions which can be triggered by a given event, ▪ Event-driven architecture ▪ Also known as serverless ▪ Highly auto-scalable ▪ Billing is based on the real consumption/execution time based ▪ Fewer available technologies than with PaaS ▪ Can be combined with microservices. ▪ Can even write a event driven API.
- 29. What can Azure Functions do? ▪ Run code based on HTTP requests ▪ Schedule code to run at predefined times ▪ Process new and modified: • Azure Cosmos DB documents • Azure Storage blobs • Azure Queue storage messages ▪ Respond to Azure Event Grid events by using subscriptions and filters ▪ Respond to high volumes of Azure Event Hubs events ▪ Respond to Azure Service Bus queue and topic messages
- 30. Azure Functions ▪Solution for running small pieces of code, or "functions," in the cloud: - Write only code that is relevant to business logic – Removes the necessity to write “plumbing” code to connect or host application components ▪Build on open-source WebJobs code ▪Supports a wide variety of programming languages, for instance: C# JAVA PHP PY JS ▪ Even supports scripting languages, such as PS SH
- 32. Scale and hosting ▪You can choose between two types of plans: – Consumption: • Instances are dynamically instanced, and you are charged based on compute time – App Service plan: • Traditional App Services model used with Web Apps, API Apps, and Mobile Apps ▪The type of plan controls: – How host instances are scaled out – The resources that are available to each host
- 33. Triggers
- 34. Trigger types ▪Triggers based on Azure services: – Cosmos DB – Blob and queues – Service Bus – Event Hub ▪Triggers based on common scenarios: – HTTP request – Scheduled timer ▪Triggers based on third-party services: – GitHub
- 35. Input and Output Bindings
- 36. Bindings ▪Declarative way to connect to data from your code: – Connect to services without writing plumbing code – Service credentials are not stored in code – Bindings are optional ▪Function can have multiple input and output bindings ▪Output bindings can send data to Azure services such as: – Storage – Azure Cosmos DB – Service Bus
- 37. Trigger and Bindings example
- 38. Durable Functions ▪Write stateful functions in a stateless environment ▪Manages state, checkpoints, and restarts ▪Defines an Orchestrator function – Workflows are defined in code – Calls other functions synchronously or asynchronously – Checkpoint progress whenever function awaits
- 39. Durable Function scenario - Chaining Function chaining refers executing a sequence of functions in a particular order. Often, the output of one function needs to be applied to the input of another function.
- 40. Durable Function scenario - Fan-out/fan-in Fan-out/fan-in refers to the pattern of executing multiple functions in parallel, and then waiting for all to finish
- 41. Durable Function scenario - Async HTTP APIs Durable Functions provides built-in APIs that simplify the code that you write for interacting with long-running function executions
- 42. Other Azure Services to modernize applications ▪ Azure Container Instances (ACI) ▪ Azure Static Websites ▪ Azure Logic Apps ▪ Azure DevOps ▪ Azure Kubernetes Services (AK8S) ▪ Azure Service Fabric ▪ Azure Cognitive Services
- 47. Thank you ☺ Happy Clouding !