Deploy the tenant-operator helm chart on Kubernetes

Question

Pulumi · Accepted Answer

To deploy the tenant-operator Helm chart on a Kubernetes cluster using Pulumi, you'll need to write a TypeScript program that makes use of the `Chart` resource from the Kubernetes package in Pulumi. This resource will allow you to specify the Helm chart you wish to deploy, along with configurations such as values and namespace.

Before we dive into the code, let's go over some essentials:
- **Chart Resource**: The `Chart` resource is a component resource that deploys a Helm chart.
- **Namespace**: It's good practice to deploy your applications within Kubernetes namespaces to segment and organize cluster resources.

Here's a step-by-step TypeScript program that demonstrates how to deploy the `tenant-operator` Helm chart:

1. **Import Necessary Packages**: Import the Pulumi Kubernetes package to interact with Kubernetes resources.

2. **Set up the Kubernetes Provider**: Ensure that you have a Kubernetes cluster and configure the Pulumi provider with access to your cluster's kubeconfig.

3. **Create a Namespace**: Optionally, you can create a Kubernetes namespace if you wish to deploy the `tenant-operator` helm chart in an isolated environment within your cluster.

4. **Deploy the Helm Chart**: Use the `Chart` resource to declare the deployment of the `tenant-operator` Helm chart. Configure it with the necessary chart values you wish to override.

5. **Export Outputs**: If necessary, export any outputs such as the deployed Helm release's namespace or other resources created by the chart that you might need to reference.

Now, let's see the program:

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

// Create a Kubernetes namespace (optional step).
const ns = new k8s.core.v1.Namespace("tenant-operator-ns", {
    metadata: {
        // Define the name of the namespace
        name: "tenant-operator",
    },
});

// Deploy the tenant-operator Helm chart in the "tenant-operator" namespace.
const tenantOperatorChart = new k8s.helm.v3.Chart("tenant-operator", {
    // Define the chart and repository details
    chart: "tenant-operator",
    version: "1.0.0", // Replace with the specific chart version you want to deploy
    fetchOpts: {
        repo: "http://charts.example.com/", // Replace with the correct Helm repository URL
    },
    // Specify the namespace created above
    namespace: ns.metadata.name,
    // Define values to override default chart values
    values: {
        // ... your tenant-operator specific values go here
    },
});

// Export the namespace name
export const namespaceName = ns.metadata.name;
```

In this code, replace the `version` and `repo` placeholders with the actual version of the chart you want to deploy and the repository URL where the `tenant-operator` chart is hosted.

After deploying this program with Pulumi, the `tenant-operator` Helm chart will be deployed into your Kubernetes cluster in the specified namespace, and you will have access to the name of the namespace through the exported variable.

Remember to install the necessary Pulumi CLI and the language-specific runtime (in this case, Node.js) on your machine. Initialize a new Pulumi project for Kubernetes and replace the contents of `index.ts` with the code above to execute this deployment. Run `pulumi up` to start the deployment process, and Pulumi will handle the rest.

Note that interacting with Helm charts through Pulumi does not require `helm` CLI to be installed, since Pulumi interacts with the Kubernetes API server directly.