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This article describes how to set up Autoscale settings for your applications using the Microsoft Azure portal or the Azure CLI.
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This article describes how to set up autoscale settings for your applications using the Microsoft Azure portal or the Azure CLI.
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Autoscale is a built-in feature of Azure Spring Apps that helps applications perform their best when demand changes. Azure Spring Apps supports scale-out and scale-in, which includes modifying the number of app instances and load balancing.
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## Prerequisites
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To follow these procedures, you need:
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* An Azure subscription. If you don't have an Azure subscription, create a [free account](https://azure.microsoft.com/free/?WT.mc_id=A261C142F) before you begin.
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* A deployed Azure Spring Apps service instance. Follow the [quickstart on deploying an app via the Azure CLI](./quickstart.md) to get started.
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* A deployed Azure Spring Apps service instance. For more information, see [Quickstart: Deploy your first application to Azure Spring Apps](./quickstart.md).
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* At least one application already created in your service instance.
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## Navigate to the Autoscale page in the Azure portal
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Use the following steps to access the autoscale settings:
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1. Sign in to the [Azure portal](https://portal.azure.com/).
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1. Go to the Azure Spring Apps **Overview** page.
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1.Select the **Apps** tab under **Settings** in the menu on the left navigation pane.
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1. Select the application for which you want to set up Autoscale. In this example, select the application named **demo**. You should then see the application's **Overview** page.
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1.Go to the **Scale out** tab under **Settings** in the menu on the left navigation pane.
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1.In the navigation pane, under **Settings**, select the **Apps**.
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1. Select the application for which you want to set up autoscale. If set up your Azure Spring Apps instance by following the directions in [Quickstart: Deploy your first application to Azure Spring Apps](./quickstart.md), select the application named **demo**. You should then see the application's **Overview** page.
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1.In the navigation pane, under **Settings**, select **Scale out**.
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## Set up Autoscale settings for your application in the Azure portal
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## Set up autoscale settings for your application in the Azure portal
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There are two options for Autoscale demand management:
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Autoscale demand management provides the following options:
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* Manual scale: Maintains a fixed instance count. In the Standard plan, you can scale out to a maximum of 500 instances. This value changes the number of separate running instances of the application.
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* Custom autoscale: Scales on any schedule, based on any metrics.
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:::image type="content" source="media/how-to-setup-autoscale/custom-autoscale.png" alt-text="Screenshot of the Azure portal that shows the Autoscale setting page with the Custom autoscale option highlighted." lightbox="media/how-to-setup-autoscale/custom-autoscale.png":::
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## Set up Autoscale settings for your application in Azure CLI
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## Set up autoscale settings for your application in Azure CLI
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You can also set Autoscale modes using the Azure CLI. The following commands create an Autoscale setting and an Autoscale rule.
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You can also set autoscale modes using the Azure CLI. The following commands create an autoscale setting and an autoscale rule. Be sure to replace the `<...>` placeholders with your own values.
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*Create Autoscale setting:
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*To create an autoscale setting, use the following command:
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```azurecli
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az monitor autoscale create \
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--count 1
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```
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*Create Autoscale rule:
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*To create an autoscale rule, use the following command:
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```azurecli
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az monitor autoscale rule create \
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For information on the available metrics, see the [User metrics options](./concept-metrics.md#user-metrics-options) section of [Metrics for Azure Spring Apps](./concept-metrics.md).
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## Set up autoscale settings for blue-green deployments
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Use the following steps to set up metrics-based autoscale settings for blue-green deployments:
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> [!IMPORTANT]
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> Create separate autoscale rules for each deployment. Set up one rule for the blue deployment, and a separate rule for the green deployment.
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1. In the Azure portal, navigate to the **Autoscale setting** page as described previously.
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1. Select **Custom autoscale**.
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1. Within a scale condition, select **Add a rule**.
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1. Choose values for the **App** dimension.
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1. For the **Deployment** dimension, set the value to either the blue or the green deployment name, not to **All values**.
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1. For the **Instance** dimension, set the value to **All values**. This ensures that the rule applies to all instances within the selected deployment.
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This setup enables each deployment to scale based on its own metrics, avoiding conflicts or unexpected behavior during rollouts.
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## Upgrade to the Standard plan
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If you're on the Basic plan and constrained by one or more of these limits, you can upgrade to the Standard plan. To upgrade, go to the **Pricing** plan menu by first selecting the **Standard tier** column and then selecting the **Upgrade** button.
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