How do I scale web applications with Azure App Service Plans?

In this guide, we will demonstrate how to scale web applications using Azure App Service Plans with Pulumi. Azure App Service Plans allow you to manage the scale and performance of your web applications by configuring the underlying compute resources. You can scale up by increasing the size of the instances or scale out by increasing the number of instances.

Key Points

• We will create an Azure Resource Group to contain our resources.
• We will create an Azure App Service Plan with a specific SKU to define the scaling options.
• We will create an Azure Web App that uses the App Service Plan.

Pulumi Program

import * as pulumi from "@pulumi/pulumi";
import * as azure from "@pulumi/azure-native";

// Create an Azure Resource Group
const resourceGroup = new azure.resources.ResourceGroup("resourceGroup", {
    location: "WestEurope",
});

// Create an Azure App Service Plan
const appServicePlan = new azure.web.AppServicePlan("appServicePlan", {
    resourceGroupName: resourceGroup.name,
    location: resourceGroup.location,
    sku: {
        name: "P1v2", // Pricing tier
        tier: "PremiumV2",
        size: "P1v2",
        capacity: 2, // Number of instances
    },
    kind: "App",
});

// Create an Azure Web App
const webApp = new azure.web.WebApp("webApp", {
    resourceGroupName: resourceGroup.name,
    location: resourceGroup.location,
    serverFarmId: appServicePlan.id,
    siteConfig: {
        alwaysOn: true,
        http20Enabled: true,
        minTlsVersion: "1.2",
    },
});

// Export the endpoint of the web app
export const webAppUrl = pulumi.interpolate`https://${webApp.defaultHostName}`;

Summary

In this program, we created an Azure Resource Group, an Azure App Service Plan, and an Azure Web App. We configured the App Service Plan with the PremiumV2 pricing tier and set it to use two instances for scaling. Finally, we created a Web App that uses this App Service Plan and exported the URL of the web application. This setup ensures that your web application can handle increased load by scaling out to multiple instances.