Deploy the cassandra-reaper helm chart on Rancher

Question

Pulumi · Accepted Answer

To deploy the `cassandra-reaper` Helm chart on a Rancher-managed Kubernetes cluster using Pulumi, we're going to follow these steps:

1. Set up a new Pulumi project and stack, if you haven't already.
2. Use the Rancher 2 Pulumi provider to interact with your Rancher instance.
3. Deploy the `cassandra-reaper` Helm chart to the Kubernetes cluster managed by Rancher.

For the sake of this guide, I'm assuming you've already configured Pulumi with access to your Rancher instance and have a Kubernetes cluster managed by Rancher ready to use.

In the program below, we'll use the `rancher2` Pulumi provider to deploy the Helm chart. The `rancher2` provider allows you to manage resources within Rancher. While specific resources to deploy Helm charts aren't directly exposed within the search results, we can still work with the `rancher2` provider to interact with Kubernetes clusters managed by Rancher.

We will make use of the `helm.v3.Release` class from the `@pulumi/kubernetes` package, which provides Pulumi with the capabilities to deploy Helm charts. In this case, we'll be deploying the `cassandra-reaper` chart.

Here's a Pulumi TypeScript program that you can use to deploy the `cassandra-reaper` Helm chart:

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

// Initialize a Pulumi project with the necessary provider configurations. Ensure that
// your Pulumi configuration has default rancher2 and kubernetes provider configurations set up.

// Name of the cluster in Rancher that you want to deploy to.
const clusterName = "my-rancher-cluster";

// First, we need to get a reference to the cluster managed by Rancher.
const cluster = new rancher2.Cluster(clusterName, { /* ... */ });

// Pulumi will use the kubeconfig from the specified cluster to interact with the Kubernetes API.
const kubeconfig = cluster.kubeConfig;

// Create a new kubernetes provider that uses the kubeconfig from the Rancher cluster.
const k8sProvider = new k8s.Provider("k8s-provider", {
    kubeconfig: kubeconfig,
});

// Next, we'll deploy the cassandra-reaper Helm chart. You'll need to specify the repository
// and chart name, as well as any values you want to override in the Helm chart.
const reaperChart = new k8s.helm.v3.Release("cassandra-reaper", {
    chart: "cassandra-reaper",
    version: "1.0.0", // Specify the chart version you want to deploy.
    repositoryOpts: {
        repo: "https://helm.repository.url/", // Replace with the actual Helm repository URL for cassandra-reaper.
    },
    // Here you can include any values you need to set for your cassandra-reaper deployment.
    // Check the cassandra-reaper Helm chart documentation for the values you can configure.
    values: {
        // ...
    },
}, { provider: k8sProvider });

// Export the status of the Helm release.
export const reaperStatus = reaperChart.status;
```

In this program, we use the `rancher2.Cluster` resource to get a reference to the cluster managed by Rancher. We then extract the `kubeconfig`, which is needed to interact with the Kubernetes cluster. After that, we use the `k8s.Provider` class, passing the `kubeconfig` so that Pulumi knows how to communicate with the cluster.

Finally, we create a `k8s.helm.v3.Release` to deploy the `cassandra-reaper` Helm chart. We haven't provided exact details for the chart repository or any custom values you might want to set for the chart—this will depend on the specifics of the chart and your deployment requirements.

This deployment will take place when you run `pulumi up`. Pulumi will plan out the deployment and present you with the proposed changes. If you confirm, it will proceed to apply those changes and deploy the `cassandra-reaper` Helm chart to your Rancher-managed Kubernetes cluster.

Please replace the placeholder values, such as the Helm repository URL and chart version, with the actual values for the `cassandra-reaper` Helm chart. You'll also likely need to add some custom values under the `values` field of the Helm release to properly configure `cassandra-reaper` to work within your environment. These could include settings for connecting to your Cassandra cluster, resource allocations, and other operational settings specific to your use case.

Note: The values you configure should adhere to the settings required by the `cassandra-reaper` Helm chart. You can typically find these details in the Helm repository or the documentation that accompanies the chart.

Remember to run `pulumi preview` to see what changes will be applied before actually performing the deployment with `pulumi up`.