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Copy file name to clipboardExpand all lines: articles/azure-functions/container-concepts.md
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@@ -4,14 +4,14 @@ description: Describes the options for and benefits of running your function cod
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ms.service: azure-functions
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ms.custom: build-2024, linux-related-content
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ms.topic: concept-article
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ms.date: 10/13/2024
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ms.date: 05/12/2025
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#CustomerIntent: As a developer, I want to understand the options that are available to me for hosting function apps in Linux containers so I can choose the best development and deployment options for containerized deployments of function code to Azure.
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# Linux container support in Azure Functions
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When you plan and develop your individual functions to run in Azure Functions, you're typically focused on the code itself. Azure Functions makes it easy to deploy just your code project to a function app in Azure. When you deploy your code project to a function app that runs on Linux, the project runs in a container that is created for you automatically. This container is managed by Functions.
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When you plan and develop your individual functions to run in Azure Functions, you're typically focused on the code itself. Azure Functions makes it easy to deploy just your code project to a function app in Azure. When you deploy your project to a Linux function app, your code runs in a container that is created for you automatically and seamlessly integrates with Functions management tools.
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Functions also supports containerized function app deployments. In a containerized deployment, you create your own function app instance in a local Docker container from a supported based image. You can then deploy this _containerized_ function app to a hosting environment in Azure. Creating your own function app container lets you customize or otherwise control the immediate runtime environment of your function code.
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@@ -23,10 +23,10 @@ There are several options for hosting your containerized function apps in Azure:
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| Hosting option | Benefits |
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| --- | --- |
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|**[Azure Container Apps]**| Azure Functions provides integrated support for developing, deploying, and managing containerized function apps on [Azure Container Apps](../container-apps/overview.md). This integration enables you to manage your apps using the same Functions tools and pages in the Azure portal. Use Azure Container Apps to host your function app containers when you need to run your event-driven functions in Azure in the same environment as other microservices, APIs, websites, workflows, or any container hosted programs. Container Apps hosting lets you run your functions in a managed Kubernetes-based environment with built-in support for open-source monitoring, mTLS, Dapr, and KEDA. Supports scale-to-zero and provides a serverless pay-for-what-you-use hosting model. You can also request dedicated hardware, even GPUs, by using workload profiles. _Recommended hosting option for running containerized function apps on Azure._|
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|**Azure Arc-enabled Kubernetes clusters (preview)**| You can host your function apps on Azure Arc-enabled Kubernetes clusters as either a code-only deployment or in a custom Linux container. Azure Arc lets you attach Kubernetes clusters so that you can manage and configure them in Azure. _Hosting Azure Functions containers on Azure Arc-enabled Kubernetes clusters is currently in preview._For more information, see [Working with containers and Azure Functions](functions-how-to-custom-container.md?pivots=azure-arc).|
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|**[Azure Functions]**| You can host your containerized function apps in Azure Functions by running the container in an [Elastic Premium](./functions-premium-plan.md) or an [App Service (Dedicated)](./dedicated-plan.md) plan. Use the Container Apps plan for rich container support from Container Apps. Premium plan hosting provides you with the benefits of dynamic scaling. You might want to use Dedicated plan hosting to take advantage of existing unused App Service plan resources. |
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|**[Kubernetes]**| Because the Azure Functions runtime provides flexibility in hosting where and how you want, you can host and manage your function app containers directly in Kubernetes clusters. [KEDA](https://keda.sh) (Kubernetes-based Event Driven Autoscaling) pairs seamlessly with the Azure Functions runtime and tooling to provide event driven scale in Kubernetes. Keep in mind that running your containerized function apps on Kubernetes, either by using KEDA or by direct deployment, is an open-source effort that you can use free of cost, with best-effort support provided by contributors and from the community. You're responsible for maintaining your own function app containers in a cluster, even when deploying to Azure Kubernetes Service (AKS). |
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|**[Azure Container Apps]**| Azure Functions provides integrated support for developing, deploying, and managing containerized function apps on [Azure Container Apps](../container-apps/overview.md). This integration enables you to manage your apps using the same Functions tools and pages in the Azure portal. Use Azure Container Apps to host your function app container in the same environment as other microservices, APIs, websites, workflows, or other container hosted programs. Container Apps hosting lets you run your functions in a managed Kubernetes-based environment with built-in support for open-source monitoring, mTLS, Dapr, and KEDA. Supports scale-to-zero and provides a serverless pay-for-what-you-use hosting model. You can also request dedicated hardware, even GPUs, by using workload profiles. _Recommended hosting option for containerized function apps n Azure._|
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|**Azure Arc-enabled Kubernetes clusters (preview)**| You can host your function apps on Azure Arc-enabled Kubernetes clusters as either a code-only deployment or in a custom Linux container. Azure Arc lets you attach Kubernetes clusters so that you can manage and configure them in Azure. _Hosting Azure Functions containers on Azure Arc-enabled Kubernetes clusters is currently in preview._ For more information, see [Working with containers and Azure Functions](functions-how-to-custom-container.md?pivots=azure-arc).|
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|**[Azure Functions]**| You can host your containerized function apps in Azure Functions by running the container in an [Elastic Premium](./functions-premium-plan.md) or an [App Service (Dedicated)](./dedicated-plan.md) plan. Use Container Apps hosting for rich container support from Container Apps. Premium plan hosting provides you with the benefits of dynamic scaling. You might want to use Dedicated plan hosting to take advantage of existing unused App Service plan resources. |
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|**[Kubernetes]**| Because the Azure Functions runtime provides flexibility in hosting where and how you want, you can host and manage your function app containers directly in Kubernetes clusters. [KEDA](https://keda.sh) (Kubernetes-based Event Driven Autoscaling) pairs seamlessly with the Azure Functions runtime and tooling to provide event driven scale in Kubernetes. **Important:** Kubernetes hosting of your containerized function apps, either by using KEDA or by direct deployment, is an open-source effort that you can use free of cost. _Best-effort_ support for this hosting scenario is provided only by contributors and by the community. You're responsible for maintaining your own function app containers in a cluster, even when deploying them to Azure Kubernetes Service (AKS). |
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