1. AI Workload Network Traffic Control with Azure Private DNS


    To control network traffic for AI workloads using Azure Private DNS, we would need to create a Private DNS Zone in your Azure subscription. This DNS zone will enable you to use your own domain names within the Azure virtual network without the need to configure and manage custom DNS servers. The domain names can be resolved by any virtual machine within the virtual network, which is especially helpful for managing internal communication between services.

    Here's what we need to do to set this up:

    1. Create a Private DNS Zone: We'll start with creating a Private DNS zone. This is a zone that is used for DNS lookups within a specific virtual network in Azure.

    2. Link the DNS Zone to a Virtual Network: Once the private DNS zone is created, we need to link it to the virtual network that contains the AI workloads.

    3. Configure DNS Settings for VMs: Make sure that the DNS settings for the virtual machines within the virtual network point to the Azure Private DNS zone. This ensures that your VMs use the private zone for DNS resolution.

    4. Configure DNS Records: Finally, configure the necessary DNS records in the private DNS zone. These might be A records for your services or CNAME records that point to canonical names, and so on.

    Let's translate this into a Pulumi program in Python. We'll use azure-native over azure as it provides management of Azure resources using the Azure Resource Manager APIs and is idiomatic to the Azure Cloud platform.

    import pulumi import pulumi_azure_native as azure_native # Replace these variables with your actual resource names and values. resource_group_name = "<RESOURCE_GROUP_NAME>" private_dns_zone_name = "<PRIVATE_DNS_ZONE_NAME>" virtual_network_name = "<VIRTUAL_NETWORK_NAME>" # Create an Azure Resource Group resource_group = azure_native.resources.ResourceGroup("resource_group", resource_group_name=resource_group_name) # Create a Private DNS zone in a resource group. private_dns_zone = azure_native.network.PrivateZone("private_dns_zone", resource_group_name=resource_group.name, private_zone_name=private_dns_zone_name) # Link the Private DNS zone to a Virtual Network virtual_network_link = azure_native.network.VirtualNetworkLink("virtual_network_link", resource_group_name=resource_group.name, private_zone_name=private_dns_zone.name, virtual_network_link_name="MyVirtualNetworkLink", virtual_network=azure_native.network.VirtualNetworkArgs( id=f"/subscriptions/{pulumi.config.Config('azure-native').get('subscription_id')}/resourceGroups/{resource_group_name}/providers/Microsoft.Network/virtualNetworks/{virtual_network_name}" ), registration_enabled=True) # Export the DNS Zone ID so that it can be used outside of Pulumi if needed. pulumi.export("private_dns_zone_id", private_dns_zone.id)

    In this program:

    • We create a new Azure resource group using the azure_native.resources.ResourceGroup class.
    • Then, we create a Private DNS zone using the azure_native.network.PrivateZone class, specifying the name we want for the DNS zone and the resource group it belongs to.
    • We link the Private DNS zone to the Virtual network using the azure_native.network.VirtualNetworkLink class. We also make sure that the registration_enabled flag is set to True, so that virtual machines within the linked virtual network can automatically register their DNS names in the zone.

    Make sure to replace <RESOURCE_GROUP_NAME>, <PRIVATE_DNS_ZONE_NAME>, and <VIRTUAL_NETWORK_NAME> with the appropriate names for your configuration.

    Finally, we output the ID of the created DNS zone, so you can use it elsewhere, like in CI/CD pipelines or other automation tools that you use.

    Make sure to install the pulumi and pulumi_azure_native packages to run this program, and you should have already been authenticated to Azure with the appropriate permissions to create the resources above.