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

Question

Pulumi · Accepted Answer

To deploy the `konnectivity-agent` Helm chart on Oracle Kubernetes Engine (OKE), we will use the Pulumi Kubernetes provider and the Helm package. The Kubernetes provider allows us to connect to our Kubernetes cluster and deploy resources to it, while the Helm package lets us work with Helm charts directly.

Here's what we will do:

1. **Configure the Kubernetes provider to connect to the OKE cluster:** This involves setting up necessary credentials and endpoint information to communicate with the OKE cluster API.
   
2. **Deploy the `konnectivity-agent` Helm chart using the `helm.v3.Chart` resource:** This resource allows us to specify the details of the Helm chart we want to deploy.

For this to work, you need to have the `kubeconfig` file for your OKE cluster ready and configured. This file contains the cluster endpoint and authentication data necessary for the Pulumi program to communicate with your Kubernetes cluster.

Now, let's break down the actual Pulumi program:

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

// You must have a kubeconfig file that allows you to connect to the OKE cluster.
// It should be appropriately secured and referenced by the 'KUBECONFIG' environment variable or saved in the default location.
const kubeconfig = ''; // Replace with actual kubeconfig content or set it as an environment variable.

const provider = new k8s.Provider('oke-provider', {
    kubeconfig: kubeconfig,
});

const konnectivityAgentChart = new k8s.helm.v3.Chart('konnectivity-agent', {
    chart: "konnectivity-agent",
    version: "0.1.0", // Replace with the correct chart version
    namespace: "default", // Choose the namespace where you want the agent deployed
}, { provider });

// Export the name of the chart we just deployed
export const chartName = konnectivityAgentChart.metadata.apply(metadata => metadata.name);

```

In this program:

- We start by importing the required Pulumi packages.
- We set up the `Provider` resource for Kubernetes. Assuming you have `kubeconfig` for your cluster, either pass its content directly as a string (not recommended for production due to sensitive data exposure) or, more securely, use an environment variable. This will configure Pulumi to communicate with your OKE cluster.
- We then declare a Helm chart resource using `k8s.helm.v3.Chart`, where we specify the name of the chart (`konnectivity-agent`) and the version you want to use. Ensure that you replace `"0.1.0"` with the correct chart version needed for your deployment.
- We use the `namespace` field to specify the namespace where the Helm chart is to be deployed. In this example, we're using the `"default"` namespace, but you could replace this with any namespace you've prepared for Helm chart deployments.

Finally, we export the name of the chart we just deployed as a stack output. This is optional but useful if you need to reference the deployed Helm release in subsequent operations or other parts of your infrastructure.

Before you run this program with `pulumi up`, make sure that you have authenticated with Oracle Cloud Infrastructure (OCI) and your `kubeconfig` is correctly set. The Pulumi CLI will use your local OCI and Kubernetes configuration to authenticate against Oracle Cloud for deploying this Helm chart.

Remember to visit the [Pulumi API documentation for helm/v3.Chart](https://www.pulumi.com/registry/packages/kubernetes/api-docs/helm/v3/chart/) to learn more about the different settings and configurations you can specify when deploying Helm charts.