Deploy the sts helm chart on Rancher

Question

Pulumi · Accepted Answer

To deploy the `sts` (StatefulSet) Helm chart on a Rancher-managed Kubernetes cluster using Pulumi, you would typically perform the following steps:

1. Set up Pulumi to communicate with your Rancher instance.
2. Configure the Helm chart deployment within your Rancher cluster.
3. Apply the configuration and deploy the Helm chart.

To do this, you'll need to make sure that Pulumi is installed on your system and you have access to your Rancher-managed Kubernetes cluster. Since the Pulumi Registry Results provided do not include a direct way to interact with Helm charts, the `rancher2` provider will be used with a generic Kubernetes representation for deploying Helm charts.

I'll guide you through this process, starting with how to integrate with Rancher and progressing to the deployment of the `sts` Helm chart using the Pulumi TypeScript language.

Below is the Pulumi program to accomplish this.

```typescript
import * as rancher2 from "@pulumi/rancher2";
import * as k8s from "@pulumi/kubernetes";

// Create a new rancher2 provider instance to interact with your Rancher instance
// You need to configure Pulumi with the Rancher API URL and access token
const rancherProvider = new rancher2.Provider("rancher-provider", {
    apiURL: "https://your-rancher-api-url",
    tokenKey: "your-rancher-api-token",
});

// Use the rancher2 provider to get the Rancher Kubernetes cluster
const cluster = new rancher2.Cluster("cluster", {
    // Specify the cluster details here. For example:
    name: "my-rancher-cluster",
    // Other necessary properties...
}, { provider: rancherProvider });

// Create a Pulumi Kubernetes provider that targets the Rancher-managed cluster
const k8sProvider = new k8s.Provider("k8s-provider", {
    kubeconfig: cluster.kubeConfig,
}, { dependsOn: [rancherProvider] });

// Define the Helm chart for the StatefulSet (`sts`)
const stsHelmChart = new k8s.helm.v3.Chart("sts-chart", {
    chart: "sts", // This is a placeholder for the actual chart name
    // Specify the chart repository here. For example:
    // repo: "https://charts.helm.sh/stable",
    // version: "1.0.0", // Specify the chart version
    // values: {
    //     // Specify the values for the chart here
    // },
}, { provider: k8sProvider });

// To validate if the Helm chart is deployed, you can export the status
export const helmChartStatus = stsHelmChart.status;
```

Here's what this program does:

- It starts by importing both the `@pulumi/rancher2` and `@pulumi/kubernetes` packages to manage resources in Rancher and deploy Helm charts.
- It then sets up the Rancher provider using your API URL and token. These allow Pulumi to communicate with your Rancher instance.
- After setting up the provider, it retrieves information about the Rancher-managed Kubernetes cluster we want to deploy our Helm chart to. The snippet assumes a Rancher cluster has already been created and is being managed by Pulumi.
- Next, it creates a `k8s.Provider` Pulumi resource that targets the Rancher cluster, which will be used as the provider for deploying the Helm chart.
- It defines the Helm chart for the StatefulSet (`sts`). The chart name, repository URL, and values for customization should be specified here. The snippet above includes placeholders to provide these values, and you would need to replace them with the actual chart details you want to use.
- Finally, it exports the status of the Helm deployment as a stack output. This output can be viewed in the Pulumi console after deployment to check the status of your Helm chart deployment.

Please ensure you replace the placeholder values in the program with actual values appropriate for your environment and Helm chart. The `chart`, `repo`, and `version` are especially important, and you will typically get these details from the Helm repository where the `sts` chart is hosted.

To apply this Pulumi program, you would run `pulumi up` in the directory where this code is saved. Pulumi will perform the deployment and handle the management of these resources for you.