Dynamic Redirects for AI Services with Named Values

Question

Pulumi · Accepted Answer

If you are looking to implement dynamic redirects for AI services using Azure API Management's Named Values, you would typically use this feature to define configurable values that can be used throughout your API Management configuration. Named Values (also known as properties or configuration variables) allow you to create a set of reusable, named constants that can be used in various places like policies, service URLs or header values.

In the context of Pulumi, you would use the `azure.apimanagement.NamedValue` resource to declare these named values in your infrastructure code. Here’s how you might implement this:

1. **Define a Named Value**: Declare a `NamedValue` resource that specifies the key and the value you want to use within API Management.

2. **Reference the Named Value**: Use the reference to the named value within policies to dynamically redirect requests or in any applicable area.

3. **Apply the Changes**: Deploy your Pulumi stack which will provision the resources in Azure accordingly.

Below is a Pulumi Python program that demonstrates how to create a Named Value within Azure API Management.

```python
import pulumi
import pulumi_azure as azure

# Define the API Management service
api_management_service = azure.apimanagement.Service("exampleApiManagementService",
    resource_group_name="example-resource-group",
    publisher_name="example-publisher",
    publisher_email="contact@example.com",
    sku_name="Consumption_0")

# Define a Named Value which contains a redirect URL (example for AI service endpoint)
redirect_named_value = azure.apimanagement.NamedValue("redirectNamedValue",
    resource_group_name="example-resource-group",
    api_management_name=api_management_service.name,
    display_name="AI-Service-Redirect-URL",
    value="https://example-ai-service.endpoint.url",
    secret=False)

# Export the ID of the Named Value, which you might use in API policies
pulumi.export("namedValueId", redirect_named_value.id)
```

In this program, we are creating an API Management Service and a Named Value within a specified Resource Group. The `NamedValue` is given a display name and a value representing the redirect URL for an AI Service. We are setting `secret` to `False` indicating that this value is not a secret and could be used openly in API Management configurations. Once this Pulumi program is deployed, you’ll be able to reference this Named Value in your API policies for dynamic redirection to the AI Service.

The `pulumi.export()` line at the end of the program is not strictly necessary for the deployment but allows you to output the Named Value ID once the Pulumi stack is deployed. You can use this ID to reference the Named Value in your policy definitions.