Deploy the taikun-lma helm chart on Oracle Kubernetes Engine (OKE)

Question

Pulumi · Accepted Answer

To deploy the taikun-lma Helm chart on Oracle Kubernetes Engine (OKE), we will be using Pulumi's Kubernetes provider, which allows us to interact with Kubernetes clusters in a declarative way using infrastructure as code. This involves the following steps:

1. **Setting up the Kubernetes provider**: This connects Pulumi with the Kubernetes cluster running in OKE, allowing Pulumi to manage resources on that cluster.

2. **Deploying the Helm Chart**: We will create a `helm.v3.Chart` resource, specifying the taikun-lma chart for deployment. The chart can be hosted on any Helm chart repository or could be present locally on your filesystem.

Before proceeding to the code, ensure that you have:

- Installed Pulumi CLI and set up the Pulumi project.
- Configured your OCI (Oracle Cloud Infrastructure) CLI with appropriate credentials and have access to the OKE cluster.
- Have `kubectl` installed and configured to communicate with the OKE cluster (Pulumi uses it to interact with the Kubernetes cluster).

Below is a Pulumi program written in TypeScript that accomplishes the goal of deploying the taikun-lma Helm chart to an OKE cluster:

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

// Use the existing kubeconfig for OKE or set up a kubeconfig from Pulumi config.
// Assuming that the kubeconfig file is located at `~/.kube/config` and is configured to
// connect to the OKE cluster.
const kubeconfig = process.env.KUBECONFIG || "~/.kube/config";

// Initialize the Kubernetes provider with the kubeconfig from OKE.
const provider = new k8s.Provider("oke-k8s", {
  kubeconfig: kubeconfig,
});

// Deploy the taikun-lma Helm chart.
const taikunLmaChart = new k8s.helm.v3.Chart("taikun-lma", {
  // Replace with the correct repository and chart details.
  // If the chart is in a public repository, specify the repo URL here.
  // If it's a local chart, you can set `path` to the chart's directory.
  repo: "taikun-lma-repo", // Example repository name
  chart: "taikun-lma", // Chart name should match the name used in the repository
  // Specify the version of the chart to be deployed. Use `null` for latest.
  version: "1.0.0", // Replace with the desired version of taikun-lma chart

// Include any custom values needed for the chart deployment.
  values: {
    // Add custom values for the Helm chart here.
    // exampleValue: "example-setting"
  },
}, { provider: provider });

// Export the resources created.
export const chartStatus = taikunLmaChart.status;

// The following export can be used to provide an easy way to retrieve the status of the Helm release.
// For example: `pulumi stack output chartStatus`
```

This Pulumi program takes the following actions:

- It starts by importing the necessary Pulumi Kubernetes package.
- It sets up the Kubernetes provider, specifying the `kubeconfig` you would obtain from your OKE cluster setup.
- It then proceeds to define a Helm chart resource using the `k8s.helm.v3.Chart` class, which deploys the specified Helm chart to the Kubernetes cluster.
- Finally, it exports the status of the deployment, allowing you to check if the deployment succeeded through the Pulumi stack output.

You can run the above Pulumi program by placing it in a `index.ts` file within your Pulumi project directory. Be sure to have your OKE `kubeconfig` correctly set up in your environment or specified in the code.

To execute the program, you would use the following Pulumi CLI commands from your terminal in the same directory as your project:

```bash
pulumi up # Preview and deploy changes
```

After running the command, Pulumi will show you a preview of the resources that will be created and prompt for confirmation before applying the changes. If everything looks correct, you can proceed with the deployment.

Remember to replace placeholders like `taikun-lma-repo` with the actual Helm chart repository and chart details you intend to use. If you are using custom values for the Helm chart, specify them in the `values` object within the `taikunLmaChart` resource definition.