Deploy the litmus-agent helm chart on Oracle Kubernetes Engine (OKE)

Question

Pulumi · Accepted Answer

To deploy the `litmus-agent` Helm chart on Oracle Kubernetes Engine (OKE) using Pulumi, we'll write a TypeScript program that does the following:

1. We'll use the Pulumi Kubernetes provider to interact with the Kubernetes cluster, specifying the OKE context for Pulumi to know which cluster to operate on.
2. We'll then install the necessary Helm chart by using the `helm.sh/v3.Chart` resource, which is part of the Pulumi Kubernetes provider. This resource allows us to deploy Helm charts in a Kubernetes cluster.

I'm going to guide you through the code required to deploy a Helm chart to OKE. Here is a step-by-step TypeScript program:

1. First, we need to import the necessary Pulumi packages to work with Kubernetes resources.
2. Next, we'll specify the OKE cluster where we want to deploy our Helm chart by using the `kubernetes.Provider` resource.
3. After setting up the provider, we will use the `kubernetes.helm.v3.Chart` resource to deploy the `litmus-agent` chart.

Make sure that you have the `litmus-agent` Helm chart details such as repository URL and chart version.

### TypeScript Program

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

// Step 1: Set up the Kubernetes provider for OKE
const okeK8sProvider = new k8s.Provider("okeProvider", {
    // Specify the kubeconfig for your OKE cluster
    kubeconfig: "your-kubeconfig-content",
});

// Step 2: Deploy the Helm chart for litmus-agent
const litmusAgentChart = new k8s.helm.v3.Chart("litmus-agent", {
    chart: "litmus-agent", // The name of the chart
    version: "chart-version", // Specify the version of the chart
    fetchOpts: {
        repo: "https://repository.url/where/chart/is/located", // The repository where the litmus-agent Helm chart is hosted
    },
    // Set additional chart values if necessary, for example:
    values: {
        /* Any required Helm chart values */
    },
}, { provider: okeK8sProvider });

// Export the status of the Helm release
export const releaseStatus = litmusAgentChart.status;
```

### Breakdown of the Program:

- **Provider Configuration**: The `k8s.Provider` resource initializes the Kubernetes provider with the kubeconfig of your OKE cluster. This tells Pulumi which cluster you are targeting for deployments.

```typescript
// Step 1: Set up the Kubernetes provider for OKE
const okeK8sProvider = new k8s.Provider("okeProvider", {
    // Specify the kubeconfig for your OKE cluster
    kubeconfig: "your-kubeconfig-content",
});
```

- **Helm Chart Deployment**: The `k8s.helm.v3.Chart` resource allows us to deploy Helm charts. It includes parameters like `chart` for the chart name, `version` for specifying the version of the Helm chart, `fetchOpts.repo` for the repository URL, and an optional `values` property for any custom configurations needed by the chart.

```typescript
// Step 2: Deploy the Helm chart for litmus-agent
const litmusAgentChart = new k8s.helm.v3.Chart("litmus-agent", {
    chart: "litmus-agent", // The name of the chart
    version: "chart-version", // Specify the version of the chart
    fetchOpts: {
        repo: "https://repository.url/where/chart/is/located", // The repository where the litmus-agent Helm chart is hosted
    },
    // Set additional chart values if necessary, for example:
    values: {
        /* Any required Helm chart values */
    },
}, { provider: okeK8sProvider });
```

- **Exporting Release Status**: Exporting a resource's attributes, such as the Helm release status, allows you to view this information after Pulumi finishes running.

```typescript
// Export the status of the Helm release
export const releaseStatus = litmusAgentChart.status;
```

Additionally, you would need the actual kubeconfig data from your Oracle Kubernetes Engine (OKE) and the precise details of the `litmus-agent` Helm chart, such as its version and any custom values it requires for configuration.

Before running a Pulumi program, ensure you have set up the Pulumi CLI and authenticated with your cloud provider. Also, install the necessary Pulumi packages in your project by running `npm install` with the correct dependencies.

This program should be part of a Pulumi project, which encapsulates all the resources you might deploy to your cloud environment. After you've reviewed the code and placed it in an `index.ts` file, you can run the Pulumi CLI commands `pulumi up` to deploy the resources or `pulumi preview` to see what changes will be made before applying them.