1. Centralized AI Development Environments on Rancher Kubernetes


    Creating a centralized AI Development Environment on Rancher involves setting up various Kubernetes resources to manage the entire lifecycle of AI applications, from development to deployment. In this scenario, we'll be leveraging Rancher, a Kubernetes management platform, to streamline the orchestration of these resources.

    Let's break down the steps involved in creating such an environment using Pulumi and Rancher:

    1. Provision a Kubernetes Cluster: Firstly, you would need a Kubernetes cluster managed by Rancher. Assuming you have Rancher set up and connected to a Kubernetes cluster, we can proceed with configuring the development environment within this cluster.

    2. Deploy AI Development Tools: Within the Kubernetes cluster, we'll deploy various development tools commonly used for AI development. This could include Jupyter notebooks, TensorFlow, PyTorch, and other machine learning libraries and frameworks.

    3. Set Up Storage Classes: Persistent storage is crucial for AI workflows to store datasets, model checkpoints, and more. Kubernetes StorageClass resources define how storage volumes are dynamically provisioned within the cluster. By defining storage classes, you enable the persistent storage required for AI development workloads.

    4. Create Namespaces: Kubernetes namespaces provide a way to divide cluster resources between multiple users. In the context of AI development, you can have separate namespaces for different projects or teams.

    5. Set Up Resource Quotas and Limits: To manage the compute resources efficiently within the cluster, you'll set up resource quotas and limits to ensure that the AI workloads do not overwhelm the cluster and that resources are fairly allocated.

    Now, let's write a Pulumi program that accomplishes some of these steps. We assume that the Rancher cluster is already set up, and we configure a storage class tailored for AI workloads which would typically require high IOPS for faster data processing.

    import pulumi import pulumi_rancher2 as rancher2 # Create a Kubernetes storage class with high performance characteristics suitable for AI development workloads. ai_storage_class = rancher2.StorageClassV2("ai-storage-class", name="ai-fast-storage", clusterId="<RANCHER_CLUSTER_ID>", # Replace with your actual cluster ID in Rancher k8sProvisioner="kubernetes.io/aws-ebs", parameters={ "type": "gp2", # General Purpose SSD volume that balances price and performance for a wide variety of workloads }, reclaimPolicy="Retain", # Retain the volume after the associated PersistentVolumeClaim is deleted allowVolumeExpansion=True, # Allow the volume to be expanded after creation if required ) # Export the name of the storage class so that it can be used by other resources. pulumi.export("storage_class_name", ai_storage_class.name)

    In the above program:

    • We import the necessary Pulumi Rancher 2 provider.
    • Define a StorageClassV2 resource from the Rancher 2 provider, setting parameters such as the provisioning type and volume type.
    • The clusterId is a placeholder you need to fill with the actual cluster ID that Rancher uses to identify your Kubernetes cluster.
    • We are configuring AWS Elastic Block Store (EBS) volumes as the backing storage with a general purpose SSD (gp2) which is usually a good balance between cost and performance for a variety of AI workloads.
    • The storage class is tagged to be Retain so that when a PersistentVolumeClaim is deleted, data is not lost, which is crucial for development environments where you may need to retain datasets and models.
    • We also enable allowVolumeExpansion to ensure that you can increase storage on the fly if your data grows.
    • Finally, we export the name of the storage class, which is useful if you want to reference it in other stacks or modules.

    For a full-blown implementation with multiple components such as namespaces, resource quotas, and tool deployments, you would add additional Pulumi resources in a similar manner, customizing each resource to suit the AI development workflows. Remember, you need to have pulumi and pulumi-rancher2 packages installed in your Python environment to run this program, and you also need to set up Pulumi CLI and configure it with access to both your Rancher instance and the corresponding cloud provider if not already done.