1. Securing Azure SQL Databases with Managed Private Endpoints


    To secure Azure SQL Databases using Managed Private Endpoints, we're going to take steps to ensure that the SQL database is only accessible within a private network. The first resource we'll use is the ManagedPrivateEndpoint, which is a component of Azure's Private Link Service. Private endpoints allow the connection to Azure services securely from your virtual network. The traffic from your VNet to the Azure service always stays on the Microsoft Azure backbone network and never crosses the internet, thus providing a more secure access method.

    Another resource we'll utilize is the SqlServer, which is the Azure SQL server resource. Within this server, we'll manage our SQL databases.

    Let's write a Pulumi program in Python to establish a managed private endpoint for an Azure SQL database. The following program performs these tasks:

    1. Sets up the Azure SQL server.
    2. Creates an Azure SQL database within the server.
    3. Configures a Virtual Network (VNet) with a subnet.
    4. Sets up a managed private endpoint for the Azure SQL database within the VNet's subnet.

    Here's the full Pulumi program to set up a secure Azure SQL database:

    import pulumi import pulumi_azure_native as azure_native # Create an Azure Resource Group resource_group = azure_native.resources.ResourceGroup('resource_group') # Create an Azure SQL server sql_server = azure_native.sql.Server('sql-server', resource_group_name=resource_group.name, location=resource_group.location, administrator_login='sqladmin', administrator_login_password='H@Sh1CoR3!', version='12.0') # Please replace with a valid password in production # Create an Azure SQL database in the SQL server sql_database = azure_native.sql.Database('sql-database', resource_group_name=resource_group.name, server_name=sql_server.name, sku=azure_native.sql.SkuArgs( name="S0", tier="Standard", ), location=resource_group.location) # Create a Virtual Network vnet = azure_native.network.VirtualNetwork('vnet', resource_group_name=resource_group.name, location=resource_group.location, address_space=azure_native.network.AddressSpaceArgs( address_prefixes=[''])) # Define your own address prefix(es) # Create a subnet within the virtual network - to be used by the managed private endpoint subnet = azure_native.network.Subnet('subnet', resource_group_name=resource_group.name, virtual_network_name=vnet.name, address_prefix='', # Define your own address prefix private_endpoint_network_policies='Disabled', # Disable Network policies for Private Endpoints private_link_service_network_policies='Enabled') # Enable Network policies for Private Link service # Create a managed private endpoint for the Azure SQL Database managed_private_endpoint = azure_native.network.PrivateEndpoint('managed-private-endpoint', resource_group_name=resource_group.name, location=resource_group.location, subnet=azure_native.network.SubnetArgs( id=subnet.id), private_link_service_connections=[ azure_native.network.PrivateLinkServiceConnectionArgs( name='sql-private-link-service-connection', private_link_service_id=sql_server.id, group_ids=['sqlServer'], # The group IDs from the SQL Server resource ) ]) # Export the crucial data which might be needed to connect to SQL server pulumi.export('sql_server_name', sql_server.name) pulumi.export('sql_database_name', sql_database.name) pulumi.export('vnet_name', vnet.name) pulumi.export('subnet_name', subnet.name) pulumi.export('private_endpoint_ip', managed_private_endpoint.private_service_connection_infoes.apply( lambda infoes: infoes[0].private_ip_address if infoes else None))

    In the above program:

    • We create a new resource group that acts as a container for the Azure resources.
    • The Azure SQL Server and Database resources represent the SQL server and a database within the server.
    • We then define a Virtual Network (VNet) and a subnet which will be used by the managed private endpoint.
    • PrivateEndpoint represents the managed private endpoint for securely connecting to the SQL server without exposing it to the internet.
    • We finally export some of the resource names and connection details for reference.

    Before running this program, you should have the Azure Pulumi provider set up and configured. Additionally, remember that you should never put plain-text secrets like SQL server passwords directly into your configuration files. Instead, use a secrets manager or environment variables to pass in sensitive information.

    When you run this Pulumi program, it will use your configured Azure credentials to create these resources in your Azure subscription. The deployed infrastructure will follow best practices for securing an SQL database using a private endpoint, ensuring its accessibility over a private network only.