Azure App Service

Overview

Azure App Service is a fully managed platform for building, deploying, and scaling web apps and APIs.

Real-life Use Cases

• Cloud Architect: Rapidly prototype and deploy web apps.

• DevOps Engineer: Automate blue/green deployments for zero downtime.

Terraform Example

resource "azurerm_app_service_plan" "main" {
  name                = "my-appservice-plan"
  location            = azurerm_resource_group.main.location
  resource_group_name = azurerm_resource_group.main.name
  sku {
    tier = "Standard"
    size = "S1"
  }
}

resource "azurerm_app_service" "main" {
  name                = "my-app"
  location            = azurerm_resource_group.main.location
  resource_group_name = azurerm_resource_group.main.name
  app_service_plan_id = azurerm_app_service_plan.main.id
}

Bicep Example

resource appServicePlan 'Microsoft.Web/serverfarms@2022-03-01' = {
  name: 'my-appservice-plan'
  location: resourceGroup().location
  sku: {
    name: 'S1'
    tier: 'Standard'
  }
}

resource appService 'Microsoft.Web/sites@2022-03-01' = {
  name: 'my-app'
  location: resourceGroup().location
  properties: {
    serverFarmId: appServicePlan.id
  }
}

Azure CLI Example

az appservice plan create --name my-appservice-plan --resource-group my-rg --sku S1
az webapp create --name my-app --resource-group my-rg --plan my-appservice-plan

Best Practices

• Use deployment slots for zero-downtime releases.

• Enable autoscaling.

Common Pitfalls

• Not configuring custom domains.

• Ignoring app health checks.

Joke: Why did App Service get so popular? It always knew how to scale up a party!