What's new in Azure App Service at #MSBuild 2026
At Microsoft Build 2026, Azure App Service introduced a powerful set of updates designed to help organizations accelerate their journey into AI, without increasing complexity or cost. These innovations focus on one clear business outcome: enabling teams to build, deploy, and scale AI-powered applications and agents faster, more securely, and with greater operational efficiency. A key highlight is the new Easy AI experience, which allows existing web apps to become AI-ready with no rearchitecting required. With capabilities like built-in Model Context Protocol (MCP), developers can instantly expose app functionality as agent-ready endpoints, enabling AI agents to interact with business logic securely and seamlessly. This dramatically reduces development time, allowing teams to move from idea to intelligent application in a fraction of the usual effort. Security and compliance are also strengthened with the general availability of Isolated v4 for Azure App Service Environments, delivering improved performance for customers that need single-tenant isolation and strong data residency guarantees. For enterprises operating in regulated industries, this ensures AI applications meet strict governance requirements without sacrificing scalability or speed. For modernization scenarios, Managed Instance on Azure App Service simplifies the migration of legacy applications, including those with OS-level dependencies. Faster restarts, enhanced diagnostics, and AI-assisted migration workflows help organizations modernize existing systems cost-effectively—avoiding expensive rewrites while unlocking AI capabilities. Recent updates include an AI-assisted approach to migrating legacy IIS applications using a multi-agent workflow powered by MCP. Managed Instance is supported on both Premium v4 and Isolated v4, laying the foundation for a modern compute infrastructure across the board. Operational efficiency is further enhanced through platform and CLI improvements designed for the “agent era.” From structured deployment diagnostics to optimized Python pipelines delivering faster deployments, these updates reduce friction and infrastructure overhead, lowering total cost of ownership. Together, these innovations position Azure App Service as a future-ready platform where businesses can rapidly build intelligent, agent-driven applications securely, efficiently, and at scale. 👉 Learn more in the full announcement: Deep dive into Azure App Service Build 2026 updates
What's New in Azure App Service at #MSIgnite 2025
Azure App Service introduces a new approach to accelerate application migration and modernization at Microsoft Ignite 2025. Known as Managed Instance on Azure App Service, it enables seamless modernization of classic web apps to the cloud with minimal code changes, especially for apps with custom Windows dependencies. Other major updates include enhanced Aspire support for .NET developers on Azure App Service for Linux, new AI integration features, expanded language/runtime support, and improvements in scaling, networking, and developer experience.How to set up subdirectory Multisite in WordPress on Azure App Service
WordPress Multisite is a feature of WordPress that enables you to run and manage multiple WordPress websites using the same WordPress installation. Follow these steps to setup Multisite in your WordPress website on App Service...What's New in Azure App Service at #MSBuild 2025
New App Service Premium v4 plan The new App Service Premium v4 (Pv4) plan has entered public preview at Microsoft Build 2025 for both Windows and Linux! This new plan is designed to support today's highly demanding application performance, scale, and budgets. Built on the latest "v6" general-purpose virtual machines and memory-optimized x64 Azure hardware with faster processors and NVMe temporary storage, it provides a noticeable performance uplift over prior generations of App Service Premium plans (over 25% in early testing). The Premium v4 offering includes nine new sizes ranging from P0v4 with a single virtual CPU and 4GB RAM all the way up through P5mv4, with 32 virtual CPUs and 256GB RAM, providing CPU and memory options to meet any business need. App Service Premium v4 plans provide attractive price-performance across the entire performance curve for both Windows and Linux customers. Premium v4 customers using pay-as-you-go (PAYG) on Azure App Service for Windows can expect to save up to 24% compared with prior Premium plans. We plan to provide deeper commitment-based discounts such as reserved instances and savings plan at GA. For more detailed pricing on the various CPU and memory options, see the pricing pages for Windows and Linux as well as the Azure Pricing Calculator. App Service currently has Pv4 deployed in a few regions with more regions being regularly added. For more details on how to configure app service plans with Premium v4 as well as a regularly updated list of regional availability, see the product documentation and start taking advantage of faster performance today! 2-zone Availability Zone support is now generally available With a recently completed platform update in May, customers now enjoy the 99.99% Availability Zone (AZ) SLA when running on only two instances (instead of three)! As part of this update more parts of the App Service footprint have enabled AZ support “in place”, which means many existing app service plans can now also use Availability Zones. Availability Zone configuration for app service plans is also now mutable. This means if an app service plan is running on an AZ-enabled part of the App Service footprint, customers can choose to enable and disable Availability Zone support at any time. Read more about the new Availability Zone options in the announcement article! ARM/CLI surface area for Availability Zone support has also been updated to provide increased visibility into AZ configuration details. The same enhanced visibility is also coming to the Azure Portal in June. With these changes customers can determine if an App Service plan is on an AZ-enabled scale unit, as well as how many zones are available for zone spanning. This allows customers to deploy with either two zones, or three zones (where available), of zone spanning for their App Service plans. For App Service plans that are AZ-enabled, customers will also be able to see the physical zone placement of each AZ enabled App Service plan. Availability Zone support is available on the new Premium v4 plan, and also supported with Premium v2, Premium v3, and the dedicated App Service Environment v3 (Isolated V2 plan). Check out the Availability Zone options for your App Service plans and start getting the benefits of zone resiliency today! .NET Aspire on Azure App Service .NET Aspire support is now available in public preview for App Service on Linux! .NET Aspire developers creating applications have an additional deployment option with App Service as a deployment target. Developers can create multi-app/multi-service .NET Aspire applications locally and deploy them into Azure using the new App Service deployment provider. The App Service and .NET Aspire teams worked together to create an App Service “provider” using .NET Aspire’s new “provider model”. The build provider translates the code-centric view of a .NET Aspire application topology into an Azure deployment mapped onto App Service constructs. The App Service provider supports securely deploying multiple .NET Aspire applications, with observability via the familiar .NET Aspire dashboard coming in the near future. The Getting Started with .NET Aspire on Azure App Service blog has instructions on how to create a .NET Aspire project for deployment onto App Service, as well a link for providing feedback. If you happen to be at Build 2025, drop by our booth or the theatre session “DEM548: How .NET Aspire on App Service enhances modern app development” to see live demonstrations of the App Service support for .NET Aspire! Using App Service to build agentic AI apps The last few months of intelligent app development have seen a frenetic pace of change with the rapid evolution of agents on Azure AI Foundry Agent Service and new agent extensibility options like Model Context Protocol (MCP) opening avenues for integrating existing data sources and APIs into agentic architectures. Here's a quick run-down of useful resources published recently: This article demonstrates hosting a remote MCP server on Azure App Service. The sample is an adaptation of the weather service example from the MCP site. The App Service variation also includes an azd template for easy experimentation via a CLI deployment to App Service! This article walks through integrating a .NET Core implementation of a “To-Do” list API running on App Service with an agent created on Azure AI Foundry Agent Service. It’s a straightforward example demonstrating how developers can bring together the power of AI agents with existing web API investments. Quick start guides for using App Service with Azure Open AI in your language of choice -- Python, Node, .NET, and Java. Using Microsoft Research’s latest 1-bit “super-small” language model, BitNet on App Service. Enhance search queries on text data stored in Azure SQL DB using natural language vector functions and Azure App Service. Includes an accompanying azd example. How to use Azure AI Search hybrid search capabilities from App Service with .NET (Blazor), Java (Spring Boot), Node (Express), or Python (FastAPI). Use GitHub Copilot to compare your application’s bicep against a representative “best practices” bicep definition and then generate the necessary bicep diff. In addition, using Sidecar for App Service on Linux, developers can easily connect Phi SLMs to their applications. Examples using the chat completion endpoint in the SLM sidecar extensions are available in this GitHub repo with code examples for .NET, Node, Python and Java. There are also accompanying docs for .NET, Node, Python (FastAPI) and Java (Spring Boot) which go into more details on using the SLM sidecar extensions. The sidecar extensions capability is also now enabled in the Azure Portal. AI Labs at Microsoft Build For those of you attending Microsoft Build in person, we will have labs for additional hands-on experience using AI with Azure App Service. LAB347: Add AI experiences to existing .NET apps using Sidecar in App Service This lab (first lab occurrence and second lab occurrence - see Exercise 4) covers an e-commerce inventory API (written in .NET) integrated with an agent running on Azure AI Foundry Agent Service. When a customer interacts with the AI agent it automatically invokes the appropriate web APIs to fetch real-time inventory information, add/remove products in a shopping cart, and increment/decrement product inventory. This is a great example of an AI powered agent grounded in a company’s ever changing transactional data. As a fun sidenote, GitHub Copilot was used extensively to build >95% of the sample application as well as to generate the OpenAPI specification that integrates the inventory web API with the AI agent! The same AI-on-App Service lab (Exercise 1) walks developers through integrating a basic Azure OpenAI chat interface into a web application. The lab also demonstrates using a background WebJob on Linux with Azure OpenAI (Exercise 2) to categorize user sentiment for product reviews. The lab also shows (Exercise 3) how to use a small language model (SLM) like Microsoft’s Phi-4 model in a WebJob to perform similar categorization, without the need to call out to an LLM. Although SLMs are not as powerful as LLMs, SLMs are an interesting alternative for integrating AI functionality where either cost, or control over AI data flows, are considerations. Azure SRE Agent for App Service One of the big announcements at Build this year was the Agentic DevOps announcement, which includes the new Azure SRE Agent. Designed to empower Site Reliability Engineers (SRE), the SRE Agent is a new agentic service that can manage Azure application platform services. including App Service, Functions, and Azure Container Apps to name just a few. It provides automatic incident response and mitigation, faster root cause analysis (RCA) of production issues, and continuous monitoring of application health and performance. With SRE Agent, you can use a natural language interface for managing your web applications on Azure App Service. To be an early adopter of the Agentic DevOps revolution, check out the announcement blog and sign-up to join the SRE Agent preview as it starts rolling out! WebJobs for App Service on Linux (GA) WebJobs for App Service on Linux just recently GA’d earlier this month. With this functionality developers can implement the same “infra-glue” style of background jobs that they have enjoyed with App service on Windows. Take a look at the documentationdemonstrating WebJobs support for shell scripts, Python, Java, .NET and Node on Linux! As mentioned earlier, the AI-on-App Service lab at this year’s Build conference has two code examples (see Exercise 2 and Exercise 3) demonstrating Linux WebJobs with Azure OpenAI, as well as a locally connected Phi-4 Small Language Model (SLM) sidecar, to categorize user sentiment for submitted product reviews. These are great examples of creatively using WebJobs to perform background batch-style work with your AI resources. Also keep an eye out for the upcoming WebJobs for Windows Containers GA which is planned “soon” this summer! Language and Framework Updates In addition to the release of .NET Aspire support for App Service, the App Service team has kept busy updating myriad Node, Python, Java/JBoss, .NET and PHP versions. To give an idea of the scope of effort keeping language and framework versions up to date across both Windows and Linux, App Service released more than two dozen language/framework specific updates in the last few weeks prior to Build. That represents the ongoing platform commitment to keeping languages regularly updated without the need for developers to explicitly invest time and effort doing so themselves. Just last month, Strapi support was introduced for App Service on Linux! Strapi is an open source headless Javascript based content management system that provides developers a robust platform for developing and delivering content across a variety of formats. The Azure Marketplace Strapi offering provides customization control, global availability and pre-built integration to essential Azure services like Azure Database for MySQL or PostgreSQL and Azure Email Communication Services. Deep dive on the details of hosting Strapi on App Service in this article. The custom error pages feature for App Service has also been updated just prior to Build. Custom error pages enable developers to customize the response rendered for common HTTP errors (403, 502 and 503) which are returned by the platform. This release includes a new option to always render custom errors regardless of whether the HTTP error was platform generated, or application generated. There will also be an Azure Portal update coming in June with support for the new custom error page features! Looking ahead to summer, stay tuned for the impending arrival of .NET 10 preview bits on App Service across both Windows and Linux! Networking and ASE Updates App Service support for public inbound IPv6 traffic is availablein most regions in public preview, with the service working towards a planned GA of inbound IPv6 support during the summer. Inbound IPv6 is supported for both IPv6-only upstream clients, as well dual-stack scenarios where a web application is reachable over either an IPv4 address or an IPv6 address. As part of an upcoming summer release, App Service will be delivering a public preview of *outbound* IPv6 traffic. For details on using IPv6 on App Service, as well to track all of the upcoming updates, consult this article: Announcing inbound IPv6 support in public preview - Azure App Service. For App Service Environment (ASE) customers, App Service will soon be releasing new support for adding custom Certificate Authorities (CAs) to an ASE. This new support will enable securing inbound TLS traffic using certificates issued by a custom Certificate Authority. Hybrid Connections customers will be happy to see that a new version of the App Service Hybrid Connection Manager (HCM) was just released just a few weeks ago. The new HCM delivers updated UX support for both Linux and Windows customers, enhanced logging and connection testing, and a brand new CLI for scripting and command-line management of Hybrid Connections! You might have missed it, but there was a recent addition to the troubleshooting options on App Service with the new Network Troubleshooter! The Network Troubleshooter offers comprehensive analysis and actionable insights to resolve connectivity failures for both Linux and Windows web apps. It tests connectivity to Azure resources like Storage, Redis, SQL Server, MySQL server, and other apps running on App Service. It diagnoses connectivity problems with Private endpoints, Service endpoints, and Internet-based endpoints, detects NAT gateways, and investigates DNS failures with custom DNS servers. Additionally, it provides actionable recommendations and surfaces any network rules it finds that are blocking connectivity. If you regularly wrestle with connectivity challenges, give the Network Troubleshooter a try! Next Steps Developers can learn more about Azure App Service at Getting Started with Azure App Service. Stay up to date on new features and innovations on Azure App Service via Azure Updates as well as the Azure App Service (@AzAppService) X feed. There is always a steady stream of great deep-dive technical articles about App Service as well as the breadth of developer focused Azure services over on the Apps on Azure blog. And lastly take a look at Azure App Service Community Standups hosted on the Microsoft Azure Developers YouTube channel. The Azure App Service Community Standup series regularly features walkthroughs of new and upcoming features from folks that work directly on the product! Build 2025 Session Reference (Note: all times below are listed in Seattle time - Pacific Daylight Time) (Note: some labs have more than one timeslot spanning multiple days) Innovate, deploy, & optimize your apps without infrastructure hassles https://build.microsoft.com/en-US/sessions/BRK201 Monday, May 19 th 11:15 AM – 12:15 PM Pacific Daylight Time Arch, 705 Pike, Level 6, Room 606 Breakout, Streaming Online and Recorded Session (BRK201) Quickly build, deploy, and scale web apps and APIs globally with App Service https://build.microsoft.com/en-US/sessions/BRK200 Tuesday, May 20 th 11:45 AM – 12:45 PM Pacific Daylight Time Arch, 705 Pike, Level 6, Room 608 Breakout, Streaming Online and Recorded Session (BRK200) Simplifying .NET upgrades with GitHub Copilot https://build.microsoft.com/en-US/sessions/DEM549 Monday, May 19 th 5:05 PM - 5:20 PM Pacific Daylight Time Arch, 705 Pike, Level 4, Hub, Theater B Demo Session – Also Recorded (DEM549) Use Azure SRE Agent to automate tasks and increase site reliability https://build.microsoft.com/en-US/sessions/DEM550 Tuesday, May 20 th 5:10 PM - 5:25 PM Pacific Daylight Time Arch, 705 Pike, Level 4, Hub, Theater A Demo Session – Also Recorded (DEM550) How .NET Aspire on App Service enhances modern app development https://build.microsoft.com/en-US/sessions/DEM548 Wednesday, May 21 st 2:00 PM - 2:15 PM Pacific Daylight Time Arch, 705 Pike, Level 4, Hub, Theater B Demo Session – Also Recorded (DEM548) Add AI experiences to existing .NET apps using Sidecars in App Service [Note: Lab participants will be able to try Phi-4 and Azure AI Foundry Agent service scenarios in this lab.] https://build.microsoft.com/en-US/sessions/LAB347 Monday, May 19 th 4:45 PM - 6:00 PM Pacific Daylight Time Arch, 800 Pike, Level 1, Yakima 1 Hands on Lab – In-Person Only (LAB347) You can also work through the lab with your own Azure subscription! Code is available at https://github.com/Azure-Samples/Build2025-LAB347. Deploy the lab resources using the included resource provisioning template (https://github.com/Azure-Samples/Build2025-LAB347/blob/main/resources/lab347.json). You can deploy the template by searching on “Deploy a custom template” in the Azure Portal, and copying and pasting the template into the “Build your own template in the editor option”! Add AI experiences to existing .NET apps using Sidecars in App Service [Note: Lab participants will be able to try Phi-4 and Azure AI Foundry Agent service scenarios in this lab.] https://build.microsoft.com/en-US/sessions/LAB347-R1 Wednesday, May 21 st 4:30 PM - 5:45 PM Pacific Daylight Time Arch, 800 Pike, Lower Level, Skagit 5 Hands on Lab – In-Person Only (LAB347-R1) You can also work through the lab with your own Azure subscription! Code is available at https://github.com/Azure-Samples/Build2025-LAB347. Deploy the lab resources using the included resource provisioning template (https://github.com/Azure-Samples/Build2025-LAB347/blob/main/resources/lab347.json). You can deploy the template by searching on “Deploy a custom template” in the Azure Portal, and copying and pasting the template into the “Build your own template in the editor option”! Modernizing .NET Applications using Azure Migrate and GitHub Copilot https://build.microsoft.com/en-US/sessions/LAB343 Tuesday, May 20 th 5:15 PM - 6:30 PM Pacific Daylight Time Arch, 800 Pike, Level 1, Yakima 1 Hands on Lab – In-Person Only (LAB343) Modernizing .NET Applications using Azure Migrate and GitHub Copilot https://build.microsoft.com/en-US/sessions/LAB343-R1 Thursday, May 22 nd 10:15 AM – 11:30 AM Pacific Daylight Time Arch, 800 Pike, Level 2, Chelan 2 Hands on Lab – In-Person Only (LAB343-R1)How to Choose the Right Hosting Plan – WordPress on App Service
Choosing the right hosting plan for your WordPress site on Azure App Service can feel overwhelming—but it doesn’t have to be. Whether you're just exploring WordPress or launching a high-traffic production site, we’ve created four tailored hosting plans to help you get started quickly and confidently. Let’s walk through how to pick the right plan for your needs. Which Hosting Plan Should You Choose? We’ve simplified the decision-making process with a clear recommendation based on your use case: Use Case Recommended Plan Hobby or exploratory site Free or Basic Small production website Standard High-load production website Premium 💡 Important: Only the Premium plan supports High Availability (HA). This is the only setting that cannot be changed after deployment. If HA is a requirement, start with Premium. Everything else—scaling, storage, CDN, networking, identity, and email—can be added or modified after deployment. Hosting Plan Pricing Breakdown You don’t pay for the hosting plan itself. Instead, you pay for the underlying Azure resources like App Service, MySQL, CDN, Blob Storage, and more. Here’s a breakdown of what each plan includes and the estimated monthly cost (based on US East region): Plan Azure App Service Azure DB for MySQL Total Est. Cost/Month Free F1 Free Tier (60 CPU mins/day, 1 GB RAM) B1ms Free Trial (1 vCore, 2 GB RAM, 32 GB) Free (for eligible subscriptions) Basic B1 (1 vCore, 1.75 GB RAM) – $12.41 B1s (1 vCore, 1 GB RAM) – $6.21 $18.62 Standard P1V2 (1 vCore, 3.5 GB RAM) – $73.73 B2s (2 vCores, 4 GB RAM) – $49.64 $123.37 Premium P1V3 (2 vCores, 8 GB RAM) – $113.15 D2ds_v4 (2 vCores, 16 GB RAM) – $124.83 $237.98 📝 Note: Prices vary by region and subscription type. Reserved instances can offer up to 60% savings. Always check the Azure Pricing Calculator for the most accurate estimates. Learn more: How to estimate pricing for WordPress on App Service | Microsoft Community Hub What Can You Customize After Deployment? Almost everything! Here’s what you can scale or configure post-deployment: Compute & Database: Scale up/down App Service and MySQL Networking: Configure VNET integration Storage: Add Azure Blob Storage Performance: Add Azure CDN or Front Door Security & Identity: Enable Entra ID managed identity Email: Integrate Azure Communication Services Email 📚 Explore the official documentation for step-by-step guides. https://learn.microsoft.com/en-us/azure/app-service/overview-wordpress Final Thoughts Choosing the right plan depends on your goals: Just exploring? Start with Free or Basic. Running a small business site? Go with Standard. Need high availability and performance? Choose Premium from the start. Still unsure? Start small—you can always scale up later (except for High Availability). Support and Feedback We’re here to help! If you need any assistance, feel free to open a support request through the Microsoft Azure portal. New support request - Microsoft Azure For more details about our offering, check out the announcement on the General Availability of WordPress on Azure App Service in the Microsoft Tech Community. Announcing the General Availability of WordPress on Azure App Service - Microsoft Tech Community. We value your feedback and ideas on how we can improve WordPress on Azure App Service. Share your thoughts and suggestions on our Community page Post idea · Community (azure.com) or report any issues on our GitHub repository Issues · Azure/wordpress-linux-appservice (github.com). Alternatively, you can start a conversation with us by emailing wordpressonazure@microsoft.com.Add-ins and more – WordPress on App Service
The WordPress on App Service create flow offers a streamlined process to set up your site along with all the necessary Azure resources. Let's learn more about add-ins that can enhance your WordPress experience and help you decide which ones to opt for. Deploying WordPress on App Service is a breeze thanks to the ARM template approach, which ties together Azure applications to ensure a seamless experience for developers. Whether you're a seasoned pro or new to the create flow, this guide will demystify these additional settings and help you make informed choices. Add-ins tab Managed Identity: Say goodbye to managing credentials! Managed Identities provide secure access to Azure resources without storing sensitive credentials. Enabling this option creates a user-assigned managed identity, configured with App Service to access Azure DB for MySQL and storage accounts. You can also configure this manually if you prefer. Learn more Email with Azure Communication Services: Emails are crucial for WordPress functionality, from password resets to admin notifications. Since SMTP is blocked in Azure App Service, Azure Communication Services handle email management seamlessly. You can configure this manually if needed. Learn more Azure CDN: Improve performance and security with Azure Content Delivery Network (CDN). It uses a distributed network of servers to store cached content close to end users, enhancing speed and reliability. Manual configuration is also an option. Learn more Azure Front Door: Like Azure CDN, Azure Front Door accelerates your web application by reducing response times and caching content at edge servers. While CDN is simpler to use, Azure Front Door offers advanced features like WAF and will replace Azure CDN by 2027. You can choose an existing profile or configure it manually. Learn more Azure Blob Storage: Store and access images, videos, and other files with Azure Blob Storage, reducing the load on your web server and improving performance. Learn more Networking tab Virtual Network: Configure IP address ranges, subnets, route tables, gateways, and security settings with Virtual Networks. You can select an existing VNET or create a new one, ensuring enough space for subnets. Deployment tab Staging Slot: Test your changes safely before deploying them to production with a staging site. This reduces the risk of disruptions and is easy to set up during deployment. Learn more High Availability: Available with Premium Hosting plans, High Availability ensures redundancy across availability zones, protecting your service against zone-level failures and ensuring business continuity. This cannot be enabled post-deployment. Learn more Ready to Deploy? The WordPress on App Service create experience simplifies the deployment of Azure resources required for WordPress. For advanced options, consider using the ARM template. Create your WordPress site today! Support and Feedback We’re here to help! If you need any assistance, feel free to open a support request through the Microsoft Azure portal. New support request - Microsoft Azure For more details about our offering, check out the announcement on the General Availability of WordPress on Azure App Service in the Microsoft Tech Community. Announcing the General Availability of WordPress on Azure App Service - Microsoft Tech Community. We value your feedback and ideas on how we can improve WordPress on Azure App Service. Share your thoughts and suggestions on our Community page Post idea · Community (azure.com) or report any issues on our GitHub repository Issues · Azure/wordpress-linux-appservice (github.com). Alternatively, you can start a conversation with us by emailing at wordpressonazure@microsoft.com.
Understanding 'Always On' vs. Health Check in Azure App Service
The 'Always On' feature in Azure App Service helps keep your app warm by ensuring it remains running and responsive, even during periods of inactivity with no incoming traffic. As this feature pings to root URI after every 5 minutes. On Other hand Health-check feature helps pinging configured path every minute to monitor the application availability on each instance. What is 'Always On' in Azure App Service? The Always On feature ensures that the host process of your web app stays running continuously. This results in better responsiveness after idle periods since the app doesn’t need to cold boot when a request arrives. How to enable Always On: Navigate to the Azure Portal and open your Web App. Go to Configuration > General Settings. Toggle Always On to On. What is Health Check in Azure App Service? Health check increases your application's availability by rerouting requests away from instance where application is marked unhealthy and replacing instances if they remain unhealthy. How to enable Health-Check: Navigate to the Azure Portal and open your Web App. Under Monitoring, select Health check. Select Enable and provide a valid URL path for your application, such as /health or /api/health. Select Save. So, is it still necessary to enable the 'Always On' feature when Health Check is already pinging your application every minute? -> Yes, please find below explanation for the same. Test App scenario: Health Check enabled (pointing to /health_check path) and Always On disabled. Started the app and sent some user requests. Observations from the Test: After the application starts up, health check pings begin following the end user's request. Please find below table representing Health-check pings following user's request to root URI. Time Bucket URL Status Request Count 2025-03-20 07:00:00.0000000 / 200 6 2025-03-20 07:00:00.0000000 /health_check 200 30 2025-03-20 07:30:00.0000000 /health_check 200 30 Subsequent Health-check pings will continue, even in the absence of user requests. However, after restarting the app and in the absence of any user requests, we observed that Health Check requests were not initiated. This indicates that Health Check does not start automatically unless application is actively running and serving requests. Conclusion: Always On ensures that the app is proactively kept warm by sending root URI pings, even post-restart. The health-check feature is useful for monitoring application availability when the application is active. However, after a restart, if the application isn't active due to a lack of requests, Health-check pings won't initiate. Therefore, it is highly recommended to enable Always On, particularly for applications that need continuous availability and to avoid application process unload events. Recommendation: Enable Always On alongside Health Check to ensure optimal performance and reliability.What's New in Azure App Service at Ignite 2024
Learn about the GA of sidecar extensibility on Linux and see team members demonstrating the latest tools for AI assisted web application migration and modernization as well as the latest updates to Java JBoss EAP on Azure App Service. Team members will also demonstrate integrating the Phi-3 small language model with a web application via the new sidecar extensibility using existing App Service hardware! Also new for this year’s Ignite, many topics that attendees see in App Service related sessions are also available for hands-on learning across multiple hands-on labs (HoLs). Don’t just watch team members demonstrating concepts on-stage, drop by one of the many HoL sessions and test drive the functionality yourself! Azure App Service team members will also be in attendance at the Expert Meetup area on the third floor in the Hub – drop by and chat if you are attending in-person! Additional demos, presentations and hands-on labs covering App Service are listed at the end of this blog post for easy reference. Sidecar Extensibility GA for Azure App Service on Linux Sidecar extensibility for Azure App Service on Linux is now GA! Linux applications deployed from source-code as well as applications deployed using custom containers can take advantage of sidecar extensibility. Sidecars enable developers to attach additional capabilities like third-party application monitoring providers, in-memory caches, or even local SLM (small language model) support to their applications without having to bake that functionality directly into their applications. Developers can configure up to four sidecar containers per application, with each sidecar being associated with its own container registry and (optional) startup command. Examples of configuring an OpenTelemetry collector sidecar are available in the documentation for both container-based applications and source-code based applications. There are also several recent blog posts demonstrating additional sidecar scenarios. One example walks through using a Redis cache sidecar as an in-memory cache to accelerate data retrieval in a web application (sample code here). Another example demonstrates adding a sidecar containing the Phi-3 SLM to a custom container web application (sample code here). Once the web app is running with the SLM sidecar, Phi-3 processes text prompts directly on the web server without the need to call remote LLMs or host models on scarce GPU hardware. Similar examples for source deployed applications are available in the Ignite 2024 hands on lab demonstrating sidecars. Exercise three walks through attaching an OTel sidecar to a source-code based application, and exercise four shows how to attach a Phi-3 sidecar to a source-code based application. Looking ahead to the future, App Service will be adding “curated sidecars” to the platform to make it easier for developers to integrate common sidecar scenarios. Development is already underway to include options for popular third-party application monitoring providers, Redis cache support, as well as a curated sidecar encapsulating the Phi-3 SLM example mentioned earlier. Stay tuned for these enhancements in the future! If you are attending Microsoft Ignite 2024 in person, drop by the theater session “Modernize your apps with AI without completely rewriting your code” (session code: THR 614) which demonstrates using sidecar extensibility to add Open Telemetry monitoring as well as Phi-3 SLM support to applications on App Service for Linux! .NET 9 GA, JBoss EAP and More Language Updates! With the recent GA of .NET 9 last week developers can deploy applications running .NET 9 GA on both Windows and Linux variants of App Service! Visual Studio, Visual Studio Code, Azure DevOps and GitHub Actions all support building and deploying .NET 9 applications onto App Service. Start a new project using .NET 9 or upgrade your existing .NET applications in-place and take advantage of .NET 9! For JBoss EAP on App Service for Linux, customers will soon be able to bring their existing JBoss licenses with them when moving JBoss EAP workloads onto App Service for Linux. This change will make it easier and more cost effective than ever for JBoss EAP customers to migrate existing workloads to App Service, including JBoss versions 7.3, 7.4 and 8.0! As a quick reminder, last month App Service also announced reduced pricing for JBoss EAP licenses (for net-new workloads) as well as expanded hardware support (both memory-optimized and Free tier are now supported for JBoss EAP applications). App Service is planning to release both Node 22 and Python 3.13 onto App Service for Linux with expected availability in December! Python 3.13 is the latest stable Python release which means developers will be able to leverage this version with confidence given long term support runs into 2029. Node 22 is the latest active LTS release of Node and is a great version for developers to adopt with its long-term support lasting into 2026. A special note for Linux Python developers, App Service now supports “auto-instrumentation” in public preview for Python versions 3.8 through 3.12. This makes it trivial for source-code based Python applications to enable Application Insights monitoring for their applications by simply turning the feature “on” in the Azure Portal. If you ever thought to yourself that it can be a hassle setting up application monitoring and hence find yourself procrastinating, this is the monitoring feature for you! Looking ahead just a few short weeks until December, App Service also plans to release PHP 8.4 for developers on App Service for Linux. This will enable PHP developers to leverage the latest fully supported PHP release with an expected support cycle stretching into 2028. For WordPress customers Azure App Service has added support for managed identities when connecting to MySQL database as well as storage accounts. The platform has also transitioned WordPress from Alpine Linux to Debian, aligning with App Service for Linux to offer a more secure platform. Looking ahead, App Service is excited to introduce some new features by the end of the year, including an App Service plugin for WordPress! This plugin will enable users to manage WordPress integration with Azure Communication Services email, set up Single Sign-On using Microsoft Entra ID, and diagnose performance bottlenecks. Stay tuned for upcoming WordPress announcements! End-to-End TLS & Min TLS Cipher Suite are now GA End-to-end TLS encryption for public multi-tenant App Service is now GA! When E2E TLS is configured, traffic between the App Service frontends and individual workers is secured using a platform supplied TLS certificate. This additional level of security is available for both Windows and Linux sites using Standard SKU and above as well as Isolatedv2 SKUs. You can enable this feature easily in the Azure Portal by going to your resource, clicking the “Configuration” blade and turning the feature “On” as shown below: Configuration of the minimum TLS cipher suite for a web application is also GA! With this feature developers can choose from a pre-determined list of cipher suites. When a minimum cipher suite is selected, the App Service frontends will reject any incoming requests that use a cipher suite weaker than the selected minimum cipher suite. This feature is supported for both Windows and Linux applications using Basic SKU and higher as well as Isolatedv2 SKUs. You configure a minimum TLS cipher suite in the Azure Portal by going to the “Configuration” blade for a website and selecting “Change” for the Minimum Inbound TLS Cipher Suite setting. In the resulting blade (shown below) you can select the minimum cipher suite for your application: To learn more about these and other TLS features on App Service, please refer to the App Service TLS overview. AI-Powered Conversational Diagnostics Building on the Conversational Diagnostics AI-powered tool and the guided decision making path introduced in Diagnostic Workflows, the team has created a new AI-driven natural language-based diagnostics solution for App Service on Linux. The new solution brings together previous functionality to create an experience that comprehends user intent, selects the appropriate Diagnostic Workflow, and keeps users engaged by providing real-time updates and actionable insights through chat. Conversational Diagnostics also provides the grounding data that the generative AI back-end uses to produce recommendations thus empowering users to check the conclusions. The integration of Conversational Diagnostics and Diagnostic Workflows marks a significant advancement in the platform’s diagnostic capabilities. Stay tuned for more updates and experience the transformative power of Generative AI-driven diagnostics firsthand! App Service Migration and Modernization The team just recently introduced new architectural guidance around evolving and modernizing web applications with the Modern Web Application pattern for .NET and Java! This guidance builds on the Reliable Web App pattern for .NET and Java as well as the Azure Migrate application and code assessment tool. With the newly released Modern Web Application guidance, there is a well-documented path for migrating web applications from on-premises/VM deployments using the application and code assessment tool, iterating and evolving web applications with best practices using guidance from the Reliable Web App pattern, and subsequently going deeper on modernization and re-factoring following guidance from the Modern Web Application pattern. Best of all customers can choose to “enter” this journey at any point and progress as far down the modernization path as needed based on their unique business and technical requirements! As a quick recap on the code assessment tool, it is a guided experience inside of Visual Studio with GitHub Copilot providing actionable guidance and feedback on recommended changes needed to migrate applications to a variety of Azure services including Azure App Service. Combined with AI-powered Conversational Diagnostics (mentioned earlier), developers now have AI-guided journeys supporting them from migration all the way through deployment and runtime operation on App Service! Networking and ASE Updates As of November 1, 2024, we are excited to announce that App Service multi-plan subnet join is generally available across all public Azure regions! Multi-plan subnet join eases network management by reducing subnet sprawl, enabling developers to connect multiple app service plans to a single subnet. There is no limit to the number of app service plans that connect to a single subnet. However, developers should keep in mind the number of available IPs since tasks such as changing the SKU for an app service plan will temporarily double the number of IP addresses used in a connected subnet. For more information as well as examples on using multi-plan subnet join see the documentation! App Service also recently announced GA of memory optimized options for Isolatedv2 on App Service Environment v3. The new memory-optimized options range from two virtual cores with 16 GB RAM in I1mv2 (compared to two virtual cores, 8 GB RAM in I1v2) all the way up to 32 virtual cores with 256 GB RAM in I5mv2. The new plans are available in most regions. Check back regularly to see if your preferred region is supported. For more details on the technical specifications of these plans, as well as information on the complete range of tiers and plans for Microsoft Azure App Service, visit our pricing page. Using services such as Application Gateway and Azure Front Door with App Service as entry points for client traffic is a common scenario that many of our customers implement. However, when using these services together, there are integration challenges around the default cookie domain for HTTP cookies, including the ARRAffinity cookie used for session affinity. App Service collaborated with the Application Gateway team to introduce a simple solution that addresses the session affinity problem. App Service introduced a new session affinity proxy configuration setting in October which tells App Service to always set the hostname for outbound cookies based on the upstream hostname seen by Application Gateway or Azure Front Door. This simplifies integration with a single-click experience for App Service developers who front-end their websites using one of Azure’s reverse proxies, and it solves the challenge of round-tripping the ArrAffinity cookie when upstream proxies are involved. Looking ahead to early 2025, App Service will shortly be expanding support for IPv6 to include both inbound and outbound connections (currently only inbound connections are supported). The current public preview includes dual-stack support for both IPv4 and IPv6, allowing for a smooth transition and compatibility with existing systems. Read more about the latest status of the IPv6 public preview on App Service here ! Lastly, the new application naming and hostname convention that was rolled out a few months earlier for App Service is now GA for App Service. The platform has also extended this new naming convention to Azure Functions where it is now available in public preview for newly created functions. To learn more about the new naming convention and the protection it provides against subdomain takeover take a look at the introductory blog post about the unique default hostname feature. Upcoming Availability Zone Improvements New Availability Zone features are currently rolling out that will make zone redundant App Service deployments more cost efficient and simpler to manage in early 2025! The platform will be changing the minimum requirement for enabling Availability Zones to two instances instead of three, while still maintaining a 99.99% SLA. Many existing app service plans with two or more instances will also automatically become capable of supporting Availability Zones without requiring additional setup. Additionally, the zone redundant setting will be mutable throughout the life of an app service plan. This upcoming improvement will allow customers on Premium V2, Premium V3, or Isolated V2 plans, to toggle zone redundancy on or off as needed. Customers will also gain enhanced visibility into Availability Zone information, including physical zone placement and counts. As a sneak peek into the future, the screenshot below shows what the new experience will look like in the Azure Portal: Stay tuned for Availability Zone updates coming to App Service in early 2025! Next Steps Developers can learn more about Azure App Service at Getting Started with Azure App Service. Stay up to date on new features and innovations on Azure App Service via Azure Updates as well as the Azure App Service (@AzAppService) X feed. There is always a steady stream of great deep-dive technical articles about App Service as well as the breadth of developer focused Azure services over on the Apps on Azure blog. Azure App Service (virtually!) attended the recently completed November .Net Conf 2024. App Service functionality was featured showing a .NET 9.0 app using Azure Sql’s recently released native vector data type support that enables developers to perform hybrid text searches on Azure Sql data using vectors generated via Azure OpenAI embeddings! And lastly take a look at Azure App Service Community Standups hosted on the Microsoft Azure Developers YouTube channel. The Azure App Service Community Standup series regularly features walkthroughs of new and upcoming features from folks that work directly on the product! Ignite 2024 Session Reference (Note: some sessions/labs have more than one timeslot spanning multiple days). (Note: all times below are listed in Chicago time - Central Standard Time). Modernize your apps with AI without completely rewriting your code Modernize your apps with AI without completely rewriting your code [Note: this session includes a demonstration of the Phi-3 sidecar scenario] Wednesday, November 20 th 1:00 PM - 1:30 PM Central Standard Time Theater Session – In-Person Only (THR614) McCormick Place West Building – Level 3, Hub, Theater C Unlock AI: Assess your app and data estate for AI-powered innovation Unlock AI: Assess your app and data estate for AI-powered innovation Wednesday, November 20 th 1:15 PM – 2:00 PM Central Time McCormick Place West Building – Level 1, Room W183c Breakout and Recorded Session (BRK137) Modernize and scale enterprise Java applications on Azure Modernize and scale enterprise Java applications on Azure Thursday, November 21 st 8:30 AM - 9:15 AM Central Time McCormick Place West Building – Level 1, Room W183c Breakout and Recorded Session (BRK147) Assess apps with Azure Migrate and replatform to Azure App Service Assess apps with Azure Migrate and replatform to Azure App Service Tuesday, November 19 th 1:15 PM - 2:30 PM Central Time McCormick Place West Building – Level 4, Room W475 Hands on Lab – In-Person Only (LAB408) Integrate GenAI capabilities into your .NET apps with minimal code changes Integrate GenAI capabilities into your .NET apps with minimal code changes [Note: Lab participants will be able to try out the Phi-3 sidecar scenario in this lab.] Wednesday, November 20 th 8:30 AM - 9:45 AM Central Time McCormick Place West Building – Level 4, Room W475 Hands on Lab – In-Person Only (LAB411) Assess apps with Azure Migrate and replatform to Azure App Service Assess apps with Azure Migrate and replatform to Azure App Service Wednesday, November 20 th 6:30 PM - 7:45 PM Central Time McCormick Place West Building – Level 4, Room W470b Hands on Lab – In-Person Only (LAB408-R1) Integrate GenAI capabilities into your .NET apps with minimal code changes Integrate GenAI capabilities into your .NET apps with minimal code changes [Note: Lab participants will be able to try out the Phi-3 sidecar scenario in this lab.] Thursday, November 21 st 10:15 AM - 11:30 AM Central Time McCormick Place West Building – Level 1, Room W180 Hands on Lab – In-Person Only (LAB411-R1) Assess apps with Azure Migrate and replatform to Azure App Service Assess apps with Azure Migrate and replatform to Azure App Service Friday, November 22 nd 9:00 AM – 10:15 AM Central Time McCormick Place West Building – Level 4, Room W474 Hands on Lab – In-Person Only (LAB408-R2)
