Fine-grained Access Control for AI Services using GCP Workload Identity Pool

Question

Pulumi · Accepted Answer

In Google Cloud Platform (GCP), a Workload Identity Pool allows you to set up fine-grained access control for cloud resources by federating external identity providers. This enables you to use external identities (from AWS, Azure, or your own identity provider) to access Google Cloud resources in a secure way, without the need for service account keys.

Here's how you can create a Workload Identity Pool using Pulumi in Python:

1. **Import necessary packages**: We use the `pulumi_gcp` package to work with GCP resources in Pulumi.
2. **Create a Workload Identity Pool**: We define a Workload Identity Pool which establishes the trust relationship between Google Cloud and the external identity provider.
3. **Set the properties**: We specify certain required properties such as the `project`, and `workload_identity_pool_id`.

Here's what the code looks like:

```python
import pulumi
import pulumi_gcp as gcp

# Create a new Workload Identity Pool.
workload_identity_pool = gcp.iam.WorkloadIdentityPool("my-workload-identity-pool",
    # The description of the workload identity pool.
    description="My Workload Identity Pool",
    # The display name for the workload identity pool.
    display_name="MyWIP",
    # The workload identity pool ID. This will be used to construct the resource name.
    workload_identity_pool_id="my-workload-identity-pool-id",
    # Project in which the workload identity pool will be created.
    # If not specified, the provider's project config variable will be used.
    project=gcp.config.project
)

# Export the name of the workload identity pool.
pulumi.export("workload_identity_pool_name", workload_identity_pool.name)
```

In this program:
- We create a Workload Identity Pool named `my-workload-identity-pool`.
- We give it a display name and description.
- We specify an ID, which should be unique within the project and used to construct resource names.

After running this Pulumi program, the Workload Identity Pool will be created in your GCP project. You can then set up identity providers and apply IAM policies to control access to GCP resources. This is the first step in setting up fine-grained access control using external identities for accessing GCP services.

Remember, in a real-world scenario, you'd also have to configure identity providers and service account impersonation to enable access. This code is the base upon which the rest of your identity federation setup will be built.