Deploy the cubefs helm chart on Rancher

Question

Pulumi · Accepted Answer

To deploy the CubeFS Helm chart on a Rancher-managed Kubernetes cluster using Pulumi, you will need to perform several steps. First, you must have a Rancher Kubernetes cluster up and running and accessible via `kubectl`. Then you will install the CubeFS Helm chart into this cluster. Pulumi does not have a direct integration with Rancher for deploying Helm charts, but we can still achieve this by using the Pulumi Kubernetes provider to apply the Helm chart to the Kubernetes cluster managed by Rancher.

Before you start, make sure you have the following prerequisites:

1. Pulumi CLI installed.
2. Access to a Rancher Kubernetes cluster with `kubectl`.
3. CubeFS Helm chart information (repository URL, chart name, version, etc.).
4. The `kubeconfig` file of the Rancher cluster configured so that `kubectl` and Pulumi can interact with your cluster.

Here is how you could write a Pulumi program in TypeScript to deploy the CubeFS Helm chart:

```typescript
import * as k8s from "@pulumi/kubernetes";

// Define the settings for the CubeFS Helm chart
const cubefsChart = new k8s.helm.v3.Chart("cubefs", {
    // Replace these values with the actual chart details
    chart: "cubefs",
    version: "1.0.0", // specify the version of the chart
    fetchOpts:{
        repo: "https://charts.cubefs.io", // URL to the repository where the chart is hosted
    },
    // Include any custom values you want to set for CubeFS
    values: {
        // Your custom values for CubeFS go here
    },
}, { provider: clusterProvider });

// Export the Cluster IP of CubeFS service for access
export const cubeFSClusterIP = cubefsChart
    .getResourceProperty("v1/Service", "cubefs", "spec")
    .apply(spec => spec.clusterIP);
```

Explanation:

- We import the Pulumi Kubernetes package, which allows us to interact with Kubernetes clusters.
- We define a new Helm chart resource for CubeFS using `new k8s.helm.v3.Chart`.
- We provide the parameters for the CubeFS Helm chart such as the chart name `cubefs`, the chart version, and the repository URL.
- Within the `values` object, you can specify the configuration for CubeFS. This should match the values that you would normally put into a values.yaml file for a Helm chart.
- Replace `"https://charts.cubefs.io"` with the actual Helm repository URL for CubeFS.
- We declare the Pulumi provider (`clusterProvider`) which should correspond to your Rancher-managed Kubernetes cluster. If you have already configured `kubectl` to point to the right cluster, you may not need to pass this explicitly.
- We use `export` to expose the Cluster IP address of the CubeFS service that gets created as a result of deploying the Helm chart. This is useful if you want to access CubeFS from outside the cluster.

To apply this Pulumi program:

1. Save the code into a file named `index.ts`.
2. Run `pulumi up` in the same directory as your `index.ts` file.
3. Pulumi CLI will prompt you to confirm the deployment. After checking the details, select `yes` to start the deployment.

This program will deploy CubeFS to your Rancher-managed Kubernetes cluster. Remember to replace the placeholders with actual values that correspond to your environment and the CubeFS Helm chart you wish to deploy.