Deploy the ibm-powervc-k8s-volume-driver helm chart on Oracle Kubernetes Engine (OKE)

Question

Pulumi · Accepted Answer

To deploy the IBM PowerVC K8s Volume Driver Helm chart on Oracle Kubernetes Engine (OKE), you will need to follow these steps within a Pulumi program:

1. Set up OKE Cluster: You'll need an existing Oracle Kubernetes Engine cluster.
2. Install Helm Chart: You'll install the IBM PowerVC K8s Volume Driver using the Helm chart on your OKE cluster.

The resources we will be using from the Pulumi Registry are:

- `oci.ContainerEngine.Cluster`: This resource is used to create and manage an Oracle Container Engine for Kubernetes (OKE) cluster.
([OCI ContainerEngine.Cluster documentation](https://www.pulumi.com/registry/packages/oci/api-docs/containerengine/cluster/))
  
- `kubernetes.helm.sh/v3.Chart`: This resource allows you to deploy applications packaged as Helm charts on Kubernetes.
([Kubernetes Helm Chart documentation](https://www.pulumi.com/registry/packages/kubernetes/api-docs/helm.sh/v3/chart/))

### Detailed Explanation

Before deploying the Helm chart, we assume that you have set up Oracle Kubernetes Engine (OKE) and have the necessary configurations at hand. This includes having your OCI credentials configured and having an existing Kubernetes cluster on OKE.

The Helm chart deployment on the Kubernetes cluster will consist of a Pulumi program that imports the Kubernetes and OCI packages. You will then use the `kubernetes.helm.sh/v3.Chart` resource to install the Helm chart. This chart will reference the IBM PowerVC K8s Volume Driver.

Here is a program written in TypeScript that you can use to deploy the IBM PowerVC K8s Volume Driver Helm chart on an existing Oracle Kubernetes Engine cluster.

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

// Scenario-specific configuration
const chartName = 'ibm-powervc-k8s-volume-driver';
// Specify the Helm Chart version if needed
const chartVersion = 'x.y.z';
// Repository where the Helm Chart can be found
const chartRepository = 'https://charts.example.com/';
// Name of your OKE cluster
const clusterName = 'my-oke-cluster';

// Fetch the kubeconfig from an existing OKE cluster
const kubeconfig = new oci.containerengine.Kubeconfig(/* ... */);

// Create an instance of the Provider referencing the kubeconfig
const k8sProvider = new k8s.Provider('oke-k8s', {
  kubeconfig: kubeconfig.content.apply(content => content),
});

// Deploy the IBM PowerVC K8s Volume Driver Helm chart
const ibmVolumeDriverChart = new k8s.helm.v3.Chart('ibmVolumeDriverChart', {
  chart: chartName,
  version: chartVersion,
  fetchOpts: {
    repo: chartRepository,
  },
}, { provider: k8sProvider });

export const chartStatus = ibmVolumeDriverChart.status;
```

In this program, we start by importing the required Pulumi packages for Kubernetes (`@pulumi/kubernetes`) and Oracle Cloud Infrastructure (`@pulumi/oci`). The constants `chartName`, `chartVersion`, and `chartRepository` hold the details of the Helm chart for the IBM PowerVC K8s Volume Driver that you would like to deploy.

Next, we retrieve the kubeconfig for your existing OKE cluster using the `oci.containerengine.Kubeconfig` resource. In practice, you would need to fill this resource with appropriate arguments to fetch the kubeconfig for your cluster.

A Kubernetes provider is then instantiated using the kubeconfig, which allows Pulumi to communicate with your OKE cluster.

The `k8s.helm.v3.Chart` resource is used to deploy the specified Helm chart to the cluster referenced by the Kubernetes provider. Specify the exact version of the Helm chart you want to deploy with the `version` parameter.

Finally, we export the status of the chart to give us information about the deployment after the `pulumi up` command is executed.

When you run this Pulumi program, it will provision the IBM PowerVC K8s Volume Driver Helm chart on your OKE cluster, utilizing Oracle's cloud infrastructure.