Deploy the cluster-crunchy helm chart on Rancher

Question

Pulumi · Accepted Answer

To deploy the `cluster-crunchy` Helm chart on a Rancher-managed Kubernetes cluster using Pulumi, you'll first need to set up your environment to interact with Rancher and then define the necessary resources in your Pulumi program.

Before you start writing the Pulumi code, make sure you have the following prerequisites in place:

1. Pulumi CLI installed and set up.
2. Access to a Rancher-managed Kubernetes cluster with proper credentials configured.
3. The Pulumi Rancher2 provider package installed, which allows Pulumi to communicate with Rancher.

The Pulumi program will accomplish the following steps:
- Authenticate with the Rancher server.
- Deploy the `cluster-crunchy` Helm chart on the specified cluster.

Now, let's write a Pulumi program to perform these actions. We'll use TypeScript as our programming language of choice.

Here's the Pulumi program to deploy the `cluster-crunchy` Helm chart on a Rancher-managed Kubernetes cluster:

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

// Create a new Pulumi project and stack for your deployment
const projectName = 'rancher-cluster-crunchy';
const stackName = 'dev';

// Create a new Pulumi stack reference to access the Rancher cluster's kubeconfig
const clusterStackRef = new pulumi.StackReference(`${projectName}/${stackName}`);

// Obtain the kubeconfig from the rancher2 managed Kubernetes cluster
const kubeconfig = clusterStackRef.getOutput('kubeconfig'); // Ensure you have an output named 'kubeconfig' that provides this data

// Set up the Kubernetes provider to deploy the Helm chart using the obtained kubeconfig
const k8sProvider = new k8s.Provider('k8sProvider', {
    kubeconfig: kubeconfig,
});

// Define the settings for the Helm chart deployment
const chartName = 'cluster-crunchy';
const chartVersion = '1.0.0'; // Replace with the actual chart version you want to install
const releaseName = 'cluster-crunchy-release';
const namespace = 'default'; // You can specify a different namespace if required

// Deploy the cluster-crunchy Helm chart using the Kubernetes provider
const helmChart = new k8s.helm.v3.Chart(releaseName, {
    chart: chartName,
    version: chartVersion,
    namespace: namespace,
    // You can add additional configuration options for the chart here
}, { provider: k8sProvider });

// Export the deployment name so that we can easily reference it later
export const helmReleaseName = helmChart.metadata.name;
```

In the code, we start by importing the Pulumi libraries for the Kubernetes and Rancher2 providers. We then establish a reference to the existing Pulumi stack that represents our Rancher cluster, and from it, we retrieve the kubeconfig file that allows us to interact with the cluster.

With the kubeconfig in hand, we set up a Kubernetes provider instance that Pulumi will use to communicate with the Rancher-managed cluster.

Finally, we deploy the `cluster-crunchy` Helm chart by creating a new `Chart` resource, providing the necessary properties like chart name, version, namespace, and any additional configuration options. We also specify that this chart should be deployed using our predefined Kubernetes provider that is configured to interact with Rancher.

We export the name of the Helm release so that it can be conveniently referenced or queried later using the `pulumi stack output helmReleaseName` command.

Keep in mind that this is a generic scaffold. You would need the exact `chartVersion` for `cluster-crunchy`, and you might need to provide additional chart-specific configuration depending on the Helm chart's requirements. You can include these configuration options in the `Chart` resource arguments. If `cluster-crunchy` has additional dependencies such as a custom repository or required secrets, you need to define these within the program as well.