Enforcing GPU Quota Policies for AI Training Clusters

Question

Pulumi · Accepted Answer

Enforcing GPU Quota Policies within AI Training Clusters is crucial to managing cost and ensuring that resources are distributed fairly among users and jobs. To enforce such policies, you can leverage resource quotas in Kubernetes, which allow you to specify resource constraints at the namespace level.

In Kubernetes, a `ResourceQuota` provides constraints that limit aggregate resource consumption per namespace. It can limit the quantity of objects created in a namespace by type, as well as the total amount of compute resources that may be consumed by resources in that namespace.

Here's what we're going to do in Pulumi to enforce GPU quota policies:

1. Create a Kubernetes namespace: This will be the isolated space where our AI training jobs will run.
2. Declare a `ResourceQuota`: This will define the GPU quota policies that we want to enforce in the namespace.

Please make sure you have configured your Pulumi Kubernetes provider and have the necessary access rights to the Kubernetes cluster where you'll be applying these configurations.

Now, let's go ahead and write a program that enforces GPU quota policies in a Kubernetes namespace for our AI clusters:

```python
import pulumi
import pulumi_kubernetes as k8s

# Step 1: Create a Kubernetes Namespace
# Namespaces are intended for use in environments with many users spread across multiple teams or projects.
ai_training_namespace = k8s.core.v1.Namespace(
    "ai-training-namespace",
    metadata={
        "name": "ai-training"
    }
)

# Step 2: Define the GPU Resource Quota policy.
# Create a ResourceQuota that specifies a limit on the number of GPUs that can be requested in total by all Pods
# in the "ai-training" namespace. You'll have to replace 'nvidia.com/gpu' with the appropriate resource name
# if your cluster uses a different name for representing GPU resources.
gpu_quota = k8s.core.v1.ResourceQuota(
    "gpu-quota",
    metadata={
        "namespace": ai_training_namespace.metadata["name"]
    },
    spec={
        "hard": {
            "limits.nvidia.com/gpu": "4"  # This line enforces a maximum of 4 GPUs can be allocated in this namespace.
        }
    }
)

# Export the name of the namespace
pulumi.export('namespace_name', ai_training_namespace.metadata["name"])
```

In the code we wrote:
1. We imported the necessary modules provided by Pulumi to interact with Kubernetes resources.
2. We created a Kubernetes `Namespace` called "ai-training" where the training jobs would be isolated from other parts of the cluster.
3. We then created a `ResourceQuota` object, `gpu_quota`, which specifies a limit on the number of GPUs that can be requested in the namespace. We've set the GPU limit to "4," which means that no more than 4 GPUs can be allocated for Pods in the "ai-training" namespace.

By applying this Pulumi program to your Kubernetes cluster, you will enforce a specific GPU quota policy on the "ai-training" namespace, ensuring that resources are used efficiently and cost-effectively.