1. Deploy the rook-cluster helm chart on Rancher


    To deploy the Rook cluster Helm chart on a Kubernetes cluster managed by Rancher, you'll first need to set up a few prerequisites:

    1. Rancher Kubernetes Cluster: You need to have a Kubernetes cluster managed by Rancher. This could be a custom cluster, an imported cluster, or a cluster you create with Rancher.

    2. Helm: Ensure that Helm is installed on your local system or wherever you are running Pulumi from, as it will be used to deploy the Helm chart into your Kubernetes cluster.

    3. Pulumi: You must have Pulumi installed and setup to work with your desired cloud provider.

    4. Access: Ensure you have appropriate access to the Rancher Kubernetes cluster and the kubeconfig file is set up correctly to interact with your cluster.

    For this task, we will use Pulumi's Kubernetes provider to deploy the Rook Helm chart. Specifically, we'll use the helm.v3.Chart component, which is a component resource that can install, upgrade, and manage Helm charts.

    Here's a detailed TypeScript program that performs this deployment:

    import * as pulumi from "@pulumi/pulumi"; import * as k8s from "@pulumi/kubernetes"; // Create a Pulumi Kubernetes provider that interacts with your Rancher Kubernetes cluster. // This assumes you have a kubeconfig file correctly setup for Pulumi to access your Rancher cluster. const k8sProvider = new k8s.Provider("rancher-k8s", { kubeconfig: pulumi.output('<YOUR_KUBECONFIG_CONTENTS>').apply(JSON.stringify), }); // Deploy the Rook cluster Helm chart into your Rancher Kubernetes cluster. const rookClusterChart = new k8s.helm.v3.Chart("rook-cluster", { chart: "rook-ceph", // The name of the Helm chart. You may need to adjust this based on the Helm repo you are using. version: "<CHART_VERSION>", // Specify the version of the chart to use. namespace: "rook-ceph", // The namespace into which the chart should be deployed. fetchOpts:{ repo: "https://charts.rook.io/release", // The repository where the Rook Helm chart is hosted. }, }, { provider: k8sProvider }); // To access the Rook Ceph cluster, it generally provides a Storage Class that you would use in your Kubernetes PVCs. // Here is how you could access the Storage Class deployed by Rook for further configuration or usage in a PVC: const storageClass = pulumi.output(rookClusterChart.resources["v1/StorageClass/rook-ceph-block"]); // Export the name of the storage class export const storageClassName = storageClass.metadata.name; // Run `pulumi up` to bring up the rook-cluster resources in your Rancher-managed cluster.

    Replace <YOUR_KUBECONFIG_CONTENTS> with the actual contents of your kubeconfig JSON object and <CHART_VERSION> with the version of the chart you'd like to deploy.

    Please note the following in the above code:

    • The kubeconfig is passed to the Kubernetes provider to establish communication with your Rancher-managed cluster. You can read this from a file or an environment variable as needed.

    • The Helm chart for Rook is specified using its name (e.g., rook-ceph), version, and the repository URL.

    • The namespace field should match the namespace you want to deploy the Rook cluster into. It might require creating the namespace beforehand or ensuring the appropriate permissions to create namespaces.

    • The resources attribute of the instantiated Chart refers to the resources created by the chart. This is useful if you want to reference the resources for other operations, such as exporting the storage class name used by Rook.

    Finally, you will run pulumi up to create the resources defined in the Pulumi program. This command will prompt you for confirmation before applying the changes to your cluster. Once confirmed, Pulumi will deploy the Rook Helm chart to your Rancher Kubernetes cluster.