Serverless Application Development with Azure
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Building apps faster with a serverless architecture in Azure using serverless code with Azure Functions, Logic Apps and Event Grid.
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Serverless Application Development with Azure
- 1. Microsoft Azure Serverless Application Development with Azure Building apps faster with a serverless architecture Callon Campbell - @flying_maverick Systems Architect
- 2. Microsoft Azure About me Callon Campbell Systems Architect / Developer with 20 years of experience developing desktop, mobile and web enterprise applications using .NET, SQL Server, Mobile and Azure technologies. Co-creator of ReflectInsight, a .NET logging framework and a real-time Live Log Viewer. 2 Email: CallonCampbell@Outlook.com Twitter: @Flying_Maverick Blog: http://TheFlyingMaverick.com LinkedIn: LinkedIn.com/in/calloncampbell Website: http://ReflectInsight.com Slideshare: https://www.slideshare.net/calloncampbell
- 3. Microsoft Azure Agenda •Overview of serverless in Azure •Available tooling •Build, deployment and monitoring •Common scenarios •Wrap up 3
- 4. Microsoft Azure What is serverless? 4
- 5. Microsoft Azure Benefits of serverless 5
- 6. Microsoft Azure Realizing serverless benefits 6
- 7. Microsoft Azure Azure serverless offerings There are three components to Azure serverless: 7
- 8. Microsoft Azure What are Logic Apps? • Fully managed iPaaS (integration Platform as a Service) • Provide serverless workflows that allow developers to easily integrate data with their apps instead of writing complex glue code between disparate systems • Orchestrate and connect the serverless functions and APIs of your applications
- 9. Microsoft Azure Advantages of Logic Apps •Save time by designing complex processes using easy to understand design tools (focus on business) •Orchestration engine built for the cloud (cloud scale, massive compute, high availability built into the platform) •Reduced DevOps •Reduced costs •Reduced time to market 9
- 10. Microsoft Azure Quickly tap into the power of the cloud Fire workflows on events from other services 10
- 11. Microsoft Azure Orchestrate anything • Run mission-critical, complex integrations scenarios with ease • Connect on-premises, hybrid and cloud applications • Position for future with API centric connectivity • Easily connect custom on- premises applications to the cloud 11
- 12. Microsoft Azure Connectors •Out-of-the-box connectors reduce integration challenges and enable you to connect apps, data and device anywhere •Currently there are almost 200 connectors 12
- 13. Microsoft Azure What is Event Grid? • Messaging service to support event-based architectures manages the routing and delivery of events from a number of sources and subscribers • Built-in support for events coming from other Azure services, like resource groups, subscriptions, storage blobs, and event hubs • Is agnostic to any language or platform 13
- 14. Microsoft Azure Topics and Subscriptions 14
- 15. Microsoft Azure Value added of Event Grid •Eliminates long polling and hammer polling •Native integrations •React to events with serverless code •Enables Fan out •Reliable delivery (24hr retry policy) •Event filtering •Makes your event part of a larger ecosystem 15
- 16. Microsoft Azure Types of Event Requests Event Grid will send to it’s subscribers two types of requests: -Subscription Validation -Notification 16
- 17. Microsoft Azure Message Schema • Events are sent to Azure Event Grid in an array, which can contain multiple event objects • The array can have a total size of up to 1 MB. Each event in the array is limited to 64 KB 17
- 18. Microsoft Azure Reliable Delivery •Event Grid uses HTTP response codes to acknowledge receipt of events. In the event of failure Event Grid retries delivery •Uses an exponential back off retry policy for event deliver (10s, 30s, 1m, 5m, 10m, 30m, 1 hr) •Retry duration expires after 24 hr 18
- 19. Microsoft Azure Event Grid Architectures Azure Event Grid is designed to be used in microservices and event based architectures 19
- 20. Microsoft Azure With Azure Event Grid •Its centered around speed, scale, breadth, and low cost •Its a lightweight notification of a condition or state change •Rather than being a general/generic messaging service, Event Grid is built specifically for serverless architectures 20
- 21. Microsoft Azure What is Azure Functions? • Azure Functions is a serverless event driven compute on demand experience • Think of Azure Functions as… • C#, JavaScript, PHP, Python and more • Visual Studio, VS Code and CLI tooling
- 23. Microsoft Azure What can I do with Azure Functions? •Azure Functions are great for processing data, integrating systems, working with IoT, simple API’s and microservices •Azure Functions provide templates for a number of key scenarios •Azure Functions supports • Triggers - a way to start execution • Bindings - a way to simplify code for input and output of data 24
- 24. Microsoft Azure Integrations • Azure Functions can be triggered by virtually any event in Azure, other 3rd party services or even from on-premise systems • These services can trigger your function (startup) or serve as input and output for your code 25 Supported Integrations • CosmosDB • Event Hubs • Mobile Apps (tables) • Notification Hubs • Service Bus (queues, topics) • Storage (blob, queues, tables) • GitHub (webhooks) • Twilio (SMS messages) • On-premises (using Service Bus)
- 26. Microsoft Azure Securing your Azure Functions HttpTriggers can be protected by Oauth providers such as: • Azure Active Directory • Microsoft Account • Facebook • Google • Twitter 27
- 27. Microsoft Azure Azure Functions runtime versions
- 28. Microsoft Azure Function timeouts •On a Consumption plan, a function can run for a maximum of 10 minutes, with a default timeout of 5 minutes. •The value can be increased changing the property functionTimeout in host.json. •For longer running functions use the App Service Plan and/or Durable Functions. 29
- 29. Microsoft Azure Develop how you want 30
- 30. Demo 1: Azure Functions from Portal
- 31. Demo 2: Debugging from Visual Studio
- 32. Microsoft Azure Deployment and monitoring 45
- 33. Microsoft Azure Build and deployment •Visual Studio (dev) •Visual Studio Team Services (devops) •Functions CLI (ops) •Azure Resource Manager (ops) •Maven / Jenkins / TeamCity? (devops) 46
- 34. Microsoft Azure Building and deploying with VSTS •Setup an automated build •Setup release / continuous release •Plus many other options… 47
- 35. Demo 3a: Setup continuous build
- 38. Microsoft Azure Release – artifact 51
- 39. Microsoft Azure Release – continuous deployment 52
- 40. Microsoft Azure Release – publish 53
- 41. Demo 3b: Demo build and release
- 42. Microsoft Azure Monitoring •Application Insights •Functions Logs •Azure Monitor (soon) 55
- 44. Microsoft Azure Proxies •Proxies provide more control over all functions or just select methods •When using a custom domain, it’s used in the proxy 57
- 45. Microsoft Azure Routing Example Take our current function url: https://tag-function1.azurewebsites.net/api/HttpTriggerCSharp3 If we add a route in the function.json like so: "route": "helloworld" Our function URL would then be like this: https://tag-function1.azurewebsites.net/api/helloworld 58
- 46. Microsoft Azure Proxy Sample 59 If I setup a proxy, I can use the following: https://tag-function1.azurewebsites.net/hello
- 47. Demo 5: Setting up routing and proxies
- 48. Microsoft Azure Common scenarios for Azure Functions 61
- 49. Microsoft Azure Timer-based processing Azure Functions supports an event based on a timer using CRON job syntax. 62
- 50. Microsoft Azure Azure service event processing Azure Functions supports triggering an event based on an activity in an Azure service. 63
- 51. Microsoft Azure SaaS event processing Azure Functions supports triggers based on activity in a SaaS service. 64
- 52. Microsoft Azure Serverless web application architectures Azure Functions can power a single page app. 65
- 53. Microsoft Azure Serverless mobile backends A mobile backend can be just a set of HTTP APIs that are called from a mobile client using the WebHook URL. 66
- 54. Microsoft Azure Real-time stream processing Azure Functions can power an IoT Stream Analytics app. 67
- 55. Microsoft Azure Real-time bot messaging Azure Functions can be used to customize the behavior of a bot using a WebHook. 68
- 56. Microsoft Azure Best practices for Azure Functions 69
- 57. Microsoft Azure Approach to building functions “A key to realizing the full value is to write only the smallest unit of logic to do a single scope of work and to keep the dependencies to a minimum.” – Joseph Fultz and Darren Brust, MSDN Magazine 70
- 58. Microsoft Azure Best practices •Functions should “do one thing” •Functions should be idempotent •Functions should finish as quickly as possible 71
- 59. Microsoft Azure Where to get started •Start small, replace 1 API or background processing item •Integration is a great place, often it’s a new layer on top of old layers 72
- 61. Microsoft Azure Pricing •No upfront cost •No termination fees •Pay only for what you use 74
- 62. Microsoft Azure Two kinds of pricing plans Consumption plan - When your function runs, Azure provides all of the necessary computational resources. You don't have to worry about resource management, and you only pay for the time that your code runs. App Service plan - Run your functions just like your web, mobile, and API apps. When you’re already using App Service for your other applications, you can also run your functions on the same plan at no additional cost. 75
- 63. Microsoft Azure Pricing - Consumption Plan • The Consumption Plan is billed based on resource consumption and executions • Consumption Plan pricing includes a monthly free grant of 1 million requests and 400,000 GB-s of resource consumption per month: • This is the recommended plan for scale…but set your limits! 76
- 64. Microsoft Azure Pricing - App Service Plan • Your functions run on dedicated VMs • Dedicated VM’s are allocated to your App Service apps and function apps are always available whether code is actively running or not • Good option if you have under utilized VMs • A VM decouples the cost from both runtime and memory size – you can limit the cost for long- running functions to the cost of the VMs they run on 77
- 65. Microsoft Azure One more demo… 78
- 66. Microsoft Azure A serverless sample 79 https://msdn.microsoft.com/en-ca/magazine/mt829271/
- 68. Microsoft Azure Summary • With Azure Functions, the focus is on the code and not managing the infrastructure. • When used as the serverless compute component of a serverless architecture, you have the following benefits: • Reduced time to market • Lower total cost of ownership • Pay per execution 82
- 69. Microsoft Azure Azure serverless compute •It’s now becoming easier than ever to create small, targeted microservice architecture using a variety of services •Azure provides many services that can help you achieve a low-friction, high-throughput and low-cost solution •Azure Functions, Logic Apps, Event Grid are just a few in the serverless architecture family 83
- 70. Azure Functions are bricks. You are the architect!
- 72. Microsoft Azure What’s next? •Try Azure Functions for free: https://azure.microsoft.com/en-us/try/app-service/ •Blog:https://blogs.msdn.microsoft.com/appservicete am/tag/azure-functions/ •Twitter: @AzureFunctions •Learn more at Microsoft Virtual Academy and Channel 9 86
- 73. Microsoft Azure References • https://azure.microsoft.com/en-us/services/functions/ • https://functions.azure.com/ • https://portal.azure.com/ • https://docs.microsoft.com/en-us/azure/azure-functions/ • https://azure.microsoft.com/en-us/pricing/details/functions/ • Azure Functions in Practice • Azure - Serverless Architecture with Azure Functions • Visual Studio Tools for Azure Functions Preview • Azure Storage Explorer 87
Notes de l'éditeur
- Overview – of Serverless and what are Azure Functions Dev tooling – along with build, deployment and monitoring capabilities
- The essence of serverless is less server. The details of the server are abstracted away from you. You don’t need to worry about optimizing which operating system to run on, patching, etc Don’t need to worry about optimizing utilization and scaling up and down for demand Event driven process Tell Azure how or when to run your code (is it based on a schedule, or when a new customer is added to salesforce, or when items are added to a queue, a table or storage, etc) Micro build You’re only charged for the usage.
- Dynamically and elastically scale to meet demand. Allows you as the developer to focus on your business logic. Everything else is taken cared for you. This drastically increases time to market.
- If you look at Quest, what used to take them 6-8 months in development can now be done in 1-2 with Azure fully managed platform services. 3 key points: 1. Reduce time to market 2. Focus on innovating new features 3. Enables your business to be more competitive
- It’s now becoming easier than ever to create small, targeted microservice architecture using a variety of services. Azure provides services like Azure Functions, Logic Apps, and Event Grid that can help you achieve a low-friction, high-throughput and low-cost solution.
- Microsoft Flow is a consumer based engine based entirely on Azure Logic Apps
- Azure Event Grid which is a messaging service built to easily build application with event-based architectures. Simply select the Azure resource you would like to subscribe to, and give the event handler or webhook endpoint to send the event to. While Event Grid integrates natively with Azure Services, it can just as easily be leveraged by anything that supports the HTTP protocol.
- Event Grid is similar to Azure Service Bus in that a Topic is an endpoint that receives messages, and a Subscription is used to receive messages through the Topic that will be handled by a message listener. These concepts are basically the same, but there are some differences in how they work. Event Grid uses a concept of events instead of messages since it’s an event-based messaging system. Because Event Grid is based on events, it lends itself nicely to microservice architectures using serverless compute options like Azure Functions and Logic Apps. in addition to other implementations. NOTE: If using Azure Functions as your handler, use the Event Grid trigger over the generic HTTP trigger as it automatically validates Event Grid Function triggers.
- Azure Event Grid completes the missing half of serverless applications, and simplifies event routing and event handling with unparalleled flexibility.
- 1b. If there is only a single event, the array has a length of 1
- 1. It can be used in a serverless application to connect data sources and event handlers. 2. In an ops automation scenario you can notify Azure Automation when virtual machines are created, or when a SQL database is spun up. 3. Finally you can use Event grid to connect your application with other services. The possibilities are really limited by your imagination.
- Azure Functions is an event driven, compute-on-demand experience. Basically just provide your code and Azure will take care of the rest…meaning that when an event happens, Azure will automatically take care of everything to run that code at scale. Azure functions can also runs EXE’s or call into DLL’s.
- Azure Functions are built on top of Azure App Service and WebJobs SDK -> this means that Azure Functions gets all the benefits of using Azure App Service
- So what do I mean by serverless scale. Well back in the old days and propbably still today we have people building monolith applications…which don’t scale. So people started to breakdown their applications into microservices and maybe even use Service Fabric. With Azure Functions we take it one step further and can create nano services.
- Any number of input and output bindings, but only have a single trigger.
- Only HttpTriggers can be protected.
- With runtime v2 you can now host on Windows or Linux (in preview)
- The limit of 10minutes is being increased to 20minutes.
- Supports remote debugging for C# only. Executing locally is handled by the Azure Functions CLI When you’re ready it provides the capability to publish to Azure.
- https://portal.azure.com/ I’ll now show you how to get started creating and running a simple HttpTrigger function from the Azure Portal.
- Let’s now use Visual Studio to create an Azure Function and see how we can debug it.
- Use the QuickStart process to create a premade function or using the left side navigation, create your own custom function.
- There are a number of templates available for different languages including some prebuilt samples. Looking at these samples and experiment functions is a great way to see what you can do.
- When you’re function is ready, save and run it immediately in the portal and see the output in the logs. You can also test your functions from the right navigation pane.
- File -> New Project, look under Cloud and then select “Azure Functions (Preview)”.
- Storage account connection should be “AzureWebJobsStorage”. You will then add your connection string to that keys value in the AppSettings. AppSettings are shared across functions.
- Using the Azure Storage Explorer, I can get my connection string for the storage account. Get Primary Connection String and add to AppSettings to key “AzureWebJobsStorage”. I can also insert some sample test data to be consumed by my function.
- Adjust timing polling. Open up Host.json and using intellisence, add “queues” : {“maxPollingInterval”: 1000} where this value is in milliseconds.
- https://portal.azure.com/ I’ll now show you how to get started creating and running a simple HttpTrigger function from the Azure Portal.
- Create new build, select “ASP.NET Core (.NET Framework)” Select “Hosted VS2017” as your agent Go to Triggers tab and enable “continuous integration” Click save.
- Create a new release Select your artifacts from the build Click on the continuous deployment toggle Configure the environment your deploying to Click save
- Can choose ASP.NET core for Azure Functions
- https://portal.azure.com/ I’ll now show you how to get started creating and running a simple HttpTrigger function from the Azure Portal.
- https://portal.azure.com/ I’ll now show you how to get started creating and running a simple HttpTrigger function from the Azure Portal.
- Instead of having to set the route in the function.json on each of our functions. Also if your using a custom domain it's used in Proxies. These are in Preview.
- Let’s now use Visual Studio to create an Azure Function and see how we can debug it.
- For example, you could execute code that runs every 15 minutes and cleans up a database table based on custom business logic.
- For example, you could execute a function that reads newly discovered log files in an Azure Blob Storage container. The data can then be transformed into a row in an Azure SQL Database table, or DocumentDB or perhaps feed it into another service. C# Azure Function for reacting to Azure Insights Events
- For example, when a file is saved in OneDrive, this triggers a function that uses the Microsoft Graph API to modify the spreadsheet, creating additional charts and calculated data.
- The app calls functions using the WebHook URL, saving user data and deciding what data to display. Or, you can do simple customizations, such as changing an ad based on user profile information. Node.js Azure Function for generating SAS tokens C# Azure Function for generating SAS tokens
- For example, a mobile application could capture an image, then call an Azure Function to get an access token for uploading to blob storage. A second Azure Function is triggered by the blob upload and resizes the image to be mobile-friendly.
- For example, IoT devices send messages to Azure Stream Analytics, which then calls an Azure Function to transform the message. This function processes the data and creates a new record in an Azure SQL Database.
- For example, you can create an Azure Function that processes a message using Cortana Analytics and call this function using the Microsoft Bot Framework.
- When building your Azure Functions consider this… Smallest unit of logic Single scope of work Keep dependencies to a minimum
- Azure Functions should be SINGLE PURPOSE in nature. Think of them as short concise statements rather than compound sentences. Azure Functions should be IDEMPOTENT in nature. This means that the resulting state of the function should be identical if called subsequent times with the same parameters. Azure Functions should be quick and short lived - keeping execution time brief. For longer running jobs consider using Azure WebJobs, or hosting the service in Azure Service Fabric, or using Durable Functions extension.
- Start small and look at replacing a single API or perhaps a background processing item. Integration is another great place to start as it’s often a new layer on top of old existing layers.
- Only pay for the time your code is running. You’ll be charged based on the number of resources your Azure Functions needs, and only for as long as it takes your code to execute.
- On a Consumption compute plan, you are currently limited to 5 minutes of computation. On a regular App Service Plan, running for 10 minutes is quite reasonable. Long-running functions is more on the order of an hour.
- Resource consumption in GB-s (gigabyte-seconds) is computed as a combination of memory size and execution time for all functions running in a Function App. Executions counted each time a function is executed in response to an event, triggered by a binding.
- This example is curtesy of MSDN Magazine and illustrates how you can use Event Grid to pass events or commands to Azure Functions and Logic Apps. https://msdn.microsoft.com/en-ca/magazine/mt829271/
- https://portal.azure.com/ I’ll now show you how to get started creating and running a simple HttpTrigger function from the Azure Portal.
- Other serverless Azure services are: Azure Functions Azure Logic Apps Event Grid Reference: https://www.simple-talk.com/cloud/cloud-development/serverless-architecture-azure/