Global Azure 2022 - Architecting Modern Serverless APIs with Azure Functions and Azure API Management.pptx

Editor's Notes

1. My name is Callon Campbell, I'm a 4 times Microsoft MVP in Azure. I’m also a consultant with Adastra specializing in App Migration, Modernization and an Azure Lead I have 20+ years in enterprise development with Microsoft technologies focused on Azure, .NET, and SQL I'm passionate about serverless and cloud-native application development and bringing those benefits to the enterprise. I'm a speaker at local community events, meetups and Global Azure.
2. Serverless in 30sec. - It’s not like there are NO servers, you just don’t have to worry about infrastructure, that’s handled for you. - It will scale from not running to 1000s of instances and back down as needed. - As it scales you only pay for what you use.
3. The tendency is to focus on event driven serverless offerings leveraging: API Management Event Grid Functions Logic Apps There are also data services like Cosmos DB But serverless in Azure is so much more… Cloud computing has opened new paradigms for enterprises to reach higher levels of productivity and scale. Serverless computing, is enabling developers, teams, and organizations to focus on business logic - leaving the hosting and scaling of resources to the cloud platform. By minimizing the time and resources you spend on infrastructure-related requirements, serverless allows you to deliver more value to the core of your business. This talk will center around leveraging Azure Functions for serverless APIs and hosting them in Azure API Management.
4. Azure Functions is a solution for easily running small pieces of code, or "functions," in the cloud. You can write just the code you need for the problem at hand, without worrying about a whole application or the infrastructure to run it. Functions can make development even more productive, using your development language of choice – such as C#, Java, JavaScript, PowerShell, and Python – and from any major platform (Windows, MacOS, Linux). Enjoy automated and flexible scaling based on your workload volume and pay just for what you use – keeping the focus on adding value instead of managing infrastructure. Functions is a great solution for building simple APIs and microservices, processing data, integrating systems, simplifying resources automation, and working with the internet-of-things (IoT). Consider Functions to extend existing applications through tasks like image or order processing, file maintenance, or for any tasks that you want to run on a schedule. Azure Functions integrates with various Azure and 3rd-party services. These services can trigger your function and start execution, or they can serve as input and output for your code. Orchestrate your serverless workflows programmatically (with Durable Functions, the Azure Functions runtime extension for stateful processes) and/or with a visual designer (using Functions with Logic Apps, thanks to the 200+ connectors with other Azure and 3rd party services). Use Functions extensions and templates on Visual Studio and Visual Studio Code for a faster and more efficient development on your local machine, fully integrated with the whole Azure platform. Develop using your favorite code editor and the Azure Functions Core Tools, with the exact same behavior you’ll have in the cloud service as you’ll be running its runtime locally – no similar or emulated experiences as seen in other platforms. Set up continuous integration and continuous delivery (CI/CD) with Azure Pipelines or GitHub, and get intelligent and proactive insights about the performance of applications in production from Azure Monitor. Pick the hosting plan that matches your business needs: Consumption plan (pay-per-execution), Premium plan (no cold start), App Service plan (including App Service Environment), Kubernetes (KEDA for event-driven containers), Azure Stack (on-premises), and IoT Edge (compute at the edge). Premium plan offering is now GA, and it allows you to run Functions without cold start by pre-warming instances, setting minimum and maximum scale values to ensure enough capacity on hand while retaining the network isolation, consistent performance and cost predictability of a dedicated hosting plan With PowerShell support in Azure Functions, you can set up serverless automation processes for infrastructure management and scripting tasks. Managing PowerShell modules is now easier than ever as the Azure Functions service will ensure the latest critical and security updates are automatically installed.
5. There are 3 aspects to Azure Functions: 1. We have triggers, like HTTP requests but this could also be a timer or events from your favorite Azure services 2. Next we have your code which reacts to the trigger. Your code can be in many languages like C#, Java, NodeJS, Python, PowerShell and more. 3. Finally we have input and output bindings. This provides a means of pulling data or pushing data to other services.
6. The new function is bootstrapped with the necessary implementation for OpenAPI support. When running the application, notice not only does the function emit the “Function1” endpoint as expected but also additional routes for a dynamic endpoint for OpenAPI document, Swagger document in JSON or YAML, Authentication redirects and the Swagger UI interactive app. The additional routes are encapsulated when the function app is deployed, meaning that they are there but not exposed as public viewable routes.
7. Azure API Management is a managed service for publishing, securing, analyzing and managing your APIs. Azure API Management abstracts, protects and optimizes your APIs. Its cloud hosted, turnkey, and fully managed. Works with APIs running in the cloud or on-prem. Publish, secure and transform your APIs. Promotes and supports app developer engagement. Provides API governance, insights, and analytics.
8. https://azure.microsoft.com/en-ca/pricing/details/api-management/
9. Looking at this architecture we’ll be focusing on the API Management aspect which calls into an Azure Function app which is serving up a RESTful API that is connected to a Cosmos DB database. We’ll be using Application Insights for monitoring both our APIM Management instance and as well as our Function App. Finally we’ll be handling CI/CD with GitHub Actions to deploy our Function App and update the APIM as well.
10. Functions. For the consumption plan, the HTTP trigger scales based on the traffic. There is a limit to the number of concurrent function instances, but each instance can process more than one request at a time. Cosmos DB. Throughput capacity for Cosmos DB is measured in Request Units (RU). A 1-RU throughput corresponds to the throughput need to GET a 1KB document. API Management. API Management can scale out and supports rule-based autoscaling. The scaling process takes at least 20 minutes. If your traffic is bursty, you should provision for the maximum burst traffic that you expect. However, autoscaling is useful for handling hourly or daily variations in traffic.
11. The app of the future is cloud native and serverless is one of the key components of building cloud native applications which are designed to take full advantage of the latest innovation in public clou. Cloud native technology is how developers can achieve the agility, reliability, and security demanded by the next generation of applications. Thank you!