![]() If your container listens to a different port, set the WEBSITES_PORT app setting in your App Service app. Configure port numberīy default, App Service assumes your custom container is listening on port 80. There are also rare cases where the app instances may change without a scale operation. The same is true if you scale out to add additional instances. If the app changes compute instances for any reason, such as scaling up and down the pricing tiers, App Service must pull down all layers again. If there have been no changes, App Service uses existing layers on the local disk. Each time the app restarts, App Service does a docker pull, but only pulls layers that have changed. These layers are stored on disk, like if you were using Docker on-premises. The first time you run a custom Docker image in App Service, App Service does a docker pull and pulls all image layers. Only when the new container is started and ready to receive requests does App Service start sending requests to it. While the new container is being pulled and started, App Service continues to serve requests from the old container. If you change your Docker container settings to point to a new container, it may take a few minutes before the app serves HTTP requests from the new container. When your network and DNS resolution is configured, you enable the routing of the image pull through the virtual network by configuring the vnetImagePullEnabled site setting: az resource update -resource-group -name -resource-type "Microsoft.Web/sites" -set properties.vnetImagePullEnabled This is also needed for Azure Container Registry with private endpoint. To connect and pull from a registry inside a virtual network or on-premises, your app will need to be connected to a virtual network using the virtual network integration feature. Use an image from a network protected registry You are all set, and the web app will now use managed identity to pull from Azure Container Registry. az webapp config set -resource-group -name -generic-configurations '' with the ID of your container registry from the az acr show commandįor more information about these permissions, see What is Azure role-based access control.Ĭonfigure your app to use the managed identity to pull from Azure Container Registry.with the service principal ID from the az webapp identity assign command.Grant the managed identity permission to access the container registry: az role assignment create -assignee -scope -role "AcrPull" The output of the command (filtered by the -query and -output arguments) is the resource ID of the Azure Container Registry. Get the resource ID of your Azure Container Registry: az acr show -resource-group -name -query id -output tsv ![]() The output of the command (filtered by the -query and -output arguments) is the service principal ID of the assigned identity, which you use shortly. Replace with the name you used in the previous step. The steps will use system-assigned managed identity, but you can use user-assigned managed identity as well.Įnable the system-assigned managed identity for the web app by using the az webapp identity assign command: az webapp identity assign -resource-group -name -query principalId -output tsv Use the following steps to configure your web app to pull from ACR using managed identity. ![]() Use managed identity to pull image from Azure Container Registry To use an image from a private registry, such as Azure Container Registry, run the following command: az webapp config container set -name -resource-group -docker-custom-image-name -docker-registry-server-url -docker-registry-server-user -docker-registry-server-password įor and, supply the login credentials for your private registry account. To change an existing custom container from the current Docker image to a new image, use the following command: az webapp config container set -name -resource-group -docker-custom-image-name / /dotnet/aspnet:6.0-nanoserver-1809Ĭhange the Docker image of a custom container./dotnet/aspnet:6.0-nanoserver-ltsc2022./dotnet/framework/aspnet:4.8-windowsservercore-ltsc2019. ![]() /dotnet/framework/aspnet:4.8-windowsservercore-ltsc2022.However, you can reduce start-up time by using one of the following parent images that are already cached in Azure App Service: It takes some time to download a parent image during app start-up. NET Core apps, use a parent image based on the Windows Server 2019 Nano Semi-Annual Servicing Channel (SAC) release. NET Framework apps, use a parent image based on the Windows Server 2019 Core Long-Term Servicing Channel (LTSC) release. The recommended way is to use Managed Identity for both Windows and Linux containers Supported parent imagesįor your custom Windows image, you must choose the right parent image (base image) for the framework you want: Service Principal is no longer supported for Windows container image pull authentication.
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