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Terraform Deployment

This directory contains Terraform modules and a deployment script for provisioning Azure services in LocalStack for Azure. Refer to the Azure Web App with Azure SQL Database guide for details about the sample application.

Prerequisites

Before deploying this solution, ensure you have the following tools installed:

Installing azlocal CLI

The deploy.sh Bash script uses the azlocal CLI instead of the standard Azure CLI to work with LocalStack. Install it using:

pip install azlocal

For more information, see Get started with the az tool on LocalStack.

Architecture Overview

The main.tf Terraform module creates the following Azure resources:

  1. Azure Resource Group: Logical container for all resources in the sample.
  2. Azure SQL Server: Logical server hosting one or more Azure SQL Databases.
  3. Azure SQL Database: The PlannerDB database storing relational vacation activity data.
  4. Azure App Service Plan: The compute resource that hosts the web application.
  5. Azure Web App: Hosts the Python Flask single-page application (Vacation Planner), connected to Azure SQL Database.
  6. Azure Key Vault: Stores the SQL connection string as a secret and a self-signed certificate for HTTPS.
  7. App Service Source Control: (Optional) Configures automatic deployment from a public GitHub repository.

The system implements a Vacation Planner web application that stores and retrieves activity data from Azure SQL Database. For more information, see Azure Web App with Azure SQL Database.

Configuration

When using LocalStack for Azure, configure the metadata_host and subscription_id settings in the Azure Provider for Terraform to ensure proper connectivity:

provider "azurerm" {
  features {
    resource_group {
      prevent_deletion_if_contains_resources = false
    }
  }

  # Set the hostname of the Azure Metadata Service (for example management.azure.com) 
  # used to obtain the Cloud Environment when using LocalStack's Azure emulator. 
  # This allows the provider to correctly identify the environment and avoid making calls to the real Azure endpoints. 
  metadata_host="localhost.localstack.cloud:4566"

  # Set the subscription ID to a dummy value when using LocalStack's Azure emulator.
  subscription_id = "00000000-0000-0000-0000-000000000000"
}

Deployment

You can set up the Azure emulator by utilizing LocalStack for Azure Docker image. Before starting, ensure you have a valid LOCALSTACK_AUTH_TOKEN to access the Azure emulator. Refer to the Auth Token guide to obtain your Auth Token and specify it in the LOCALSTACK_AUTH_TOKEN environment variable. The Azure Docker image is available on the LocalStack Docker Hub. To pull the Azure Docker image, execute the following command:

docker pull localstack/localstack-azure-alpha

Start the LocalStack Azure emulator using the localstack CLI, execute the following command:

# Set the authentication token
export LOCALSTACK_AUTH_TOKEN=<your_auth_token>

# Start the LocalStack Azure emulator
IMAGE_NAME=localstack/localstack-azure-alpha localstack start -d
localstack wait -t 60

# Route all Azure CLI calls to the LocalStack Azure emulator
azlocal start-interception

Navigate to the terraform folder:

cd samples/web-app-sql-database/python/terraform

Make the script executable:

chmod +x deploy.sh

Run the deployment script:

./deploy.sh

Validation

After deployment, you can use the validate.sh script to verify that all resources were created and configured correctly:

#!/bin/bash

# Variables
# Check resource group
az group show \
--name local-rg \
--output table

# List resources
az resource list \
--resource-group local-rg \
--output table

# Check Azure Web App
az webapp show \
--name local-webapp-test \
--resource-group local-rg \
--output table

# Check Azure SQL Server
az sql server show \
--name local-sqlserver-test \
--resource-group local-rg \
--output table

# Check Azure SQL Database
az sql db show \
--name PlannerDB \
--server local-sqlserver-test \
--resource-group local-rg \
--output table

Cleanup

To destroy all created resources:

# Delete resource group and all contained resources
az group delete --name local-rg --yes --no-wait

# Verify deletion
az group list --output table

This will remove all Azure resources created by the CLI deployment script.

Related Documentation