Deploy the cass-operator helm chart on AWS EKS

Question

Pulumi · Accepted Answer

To deploy the `cass-operator` Helm chart on AWS EKS using Pulumi, we'll follow these steps:

1. Set up the EKS cluster.
2. Define configuration for the Helm chart deployment.
3. Use Pulumi to deploy the Helm chart.

Let's start by setting up an EKS cluster. We'll use the `@pulumi/eks` package because it simplifies the EKS cluster creation and provides high-level abstractions for deploying to EKS.

```typescript
import * as pulumi from "@pulumi/pulumi";
import * as aws from "@pulumi/aws";
import * as eks from "@pulumi/eks";

// Create an EKS cluster.
const cluster = new eks.Cluster("my-cluster", {
    // You might want to configure these parameters to tailor your EKS cluster
    // to your needs (e.g. size, region, tags, etc.). For our purposes here, we're
    // using the default configuration which will create a small cluster.
});

// Export the cluster's kubeconfig.
export const kubeconfig = cluster.kubeconfig;
```

Next, we'll deploy the `cass-operator` Helm chart to the EKS cluster:

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

// Create a provider for the Kubernetes cluster. This uses the kubeconfig from the EKS cluster we created.
const provider = new k8s.Provider("provider", {
    kubeconfig: cluster.kubeconfig.apply(JSON.stringify),
});

// Use the Helm chart from the repository to deploy cass-operator.
const cassOperatorChart = new k8s.helm.v3.Chart("cass-operator", {
    chart: "cass-operator",
    version: "1.0.0", // Specify the version of the chart you wish to deploy.
    fetchOpts: {
        repo: "https://k8ssandra.github.io/cass-operator/charts", // The repository URL for the cass-operator chart.
    },
    // You may need to pass specific `values` to configure the cass-operator properly.
    // The values you pass will depend on how you want to configure the operator.
}, { provider });

// Export relevant resources.
export const cassOperatorDeployment = cassOperatorChart.getResource("v1/Deployment", "cass-operator");
```

Here's what we did in the above Pulumi program:

- Imported the necessary Pulumi and provider packages.
- Created an EKS cluster using `@pulumi/eks`, which provides us with a `kubeconfig` we can use with the Kubernetes provider.
- Defined a `Provider` that allows us to communicate with our EKS cluster's Kubernetes API server.
- Deployed the `cass-operator` Helm chart specifying the chart name, chart version, and the repository URL where Pulumi can fetch the chart from.
- Exported the `kubeconfig` and the deployment of `cass-operator` so they can be easily retrieved with the Pulumi CLI.

Here are some important notes:

- This program assumes you've already set up the AWS provider with default configuration variables (region, credentials, etc.) via the Pulumi CLI or environment variables.
- `cass-operator` chart version `1.0.0` and the repository URL provided are placeholders as an example. You will need to provide the specific version you want and the correct repository URL for your use case.
- The `values` to customize the `cass-operator` deployment are not included. These values are specific to your requirements and should conform to the options available for the Helm chart you're deploying.

Before you apply this Pulumi program, ensure you have Pulumi and AWS CLI installed and configured. Then, run the following commands:

```shell
pulumi stack init dev --non-interactive         # Initializes a new stack called dev
pulumi up --yes                                # Deploys the stack
```

Pulumi will output the resulting state of your cloud resources, including the kubeconfig which you can use to interact with your Kubernetes cluster using `kubectl`. After successfully applying your Pulumi program, `cass-operator` should be deployed to your EKS cluster, ready for you to use with Cassandra workloads.