Deploy the stakater-buildah helm chart on Rancher

Question

Pulumi · Accepted Answer

Deploying a Helm chart on a Rancher-managed Kubernetes cluster involves several steps. Below is a Pulumi program written in TypeScript that you can use as a guide to accomplish this task. This program assumes you have:

1. Access to a Rancher-managed Kubernetes cluster.
2. The necessary permissions to deploy applications to this cluster.

Here is an outline of the steps we will follow in the Pulumi program:

1. Initialize a new Pulumi project with the necessary imports.
2. Create a new Kubernetes namespace for the `stakater-buildah` Helm chart (optional but recommended for organization and access control).
3. Deploy the `stakater-buildah` Helm chart into the Kubernetes namespace created in the previous step.

The Pulumi `@pulumi/rancher2` package can manage Rancher resources. However, the deployment of a Helm chart to a Kubernetes cluster managed by Rancher actually doesn't require specific Rancher components; we'll utilize the standard Kubernetes provider from Pulumi to deploy the Helm chart.

Let's get started with the actual Pulumi program:

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

// Create a new Kubernetes namespace for stakater-buildah
const ns = new k8s.core.v1.Namespace("stakater-buildah-ns", {
    metadata: {
        // You can specify additional metadata here (e.g., labels, annotations)
    },
});

// Deploy the stakater-buildah Helm chart
const chart = new k8s.helm.v3.Chart("stakater-buildah", {
    chart: "buildah",
    version: "1.0.0", // Replace with the actual chart version
    namespace: ns.metadata.name,
    fetchOpts:{
        repo: "https://stakater.github.io/stakater-charts/", // Helm chart repository URL
    },
    // You can add chart values here to configure stakater-buildah
    values: {
        // Example:
        // replicaCount: 2,
    },
}, { dependsOn: [ns] }); // Ensure the namespace is created before the chart

// Export the base URL of the stakater-buildah service
export const buildahUrl = chart.getResourceProperty("v1/Service", "stakater-buildah", "status").apply(status => {
    return status.loadBalancer.ingress[0].ip; // This line depends on your service type and might need adjustment
});
```

This program does the following:

1. Imports the Kubernetes package from Pulumi which is used to interact with Kubernetes resources.
2. Declares a new Kubernetes namespace resource for organizational purposes.
3. Deploys the `stakater-buildah` Helm chart into the specified namespace. It specifies the chart name, version, and the repository where the chart can be found.
4. Exports the URL of the deployed service if it's accessible through a LoadBalancer. Note that this assumes a LoadBalancer service type, you might need to adjust if your service type is different (like ClusterIP or NodePort).

To run this Pulumi program:

1. Ensure Pulumi and the required cloud CLI (in this case, Rancher CLI, `kubectl` for Kubernetes) are installed and configured on your machine.
2. Create a new Pulumi TypeScript project if you haven't already (`pulumi new typescript`).
3. Place the above code into the `index.ts` file within your Pulumi project.
4. Run `pulumi up` to preview and deploy the resources.

Remember to replace the Helm chart version with the version you want to deploy. Also, if `stakater-buildah` requires specific customization, you should provide these values in the `values` field of the Helm chart resource. The exported `buildahUrl` at the end is to access the deployed application; it may require adjustments based on your exact service setup.