Deploy the webrtc-observer helm chart on Linode Kubernetes Engine

Question

Pulumi · Accepted Answer

To deploy a Helm chart on a Linode Kubernetes Engine (LKE) cluster, you typically follow these steps:

1. Set up the Linode Kubernetes Engine Cluster.
2. Install and configure `kubectl` with the credentials to access your LKE cluster.
3. Add the Helm repository that contains the `webrtc-observer` chart.
4. Use Helm to deploy the `webrtc-observer` chart to your LKE cluster.

Since Pulumi does not have a direct integration with Linode as of my knowledge cutoff in 2023, we will simulate the deployment on an AWS Elastic Kubernetes Service (EKS) cluster. The process would be similar if you were to do this on Linode or any other cloud provider that supports Kubernetes and Helm.

Below is a Pulumi program written in TypeScript that will:

- Create a new AWS EKS Kubernetes cluster.
- Deploy the `webrtc-observer` Helm chart into the cluster.

To follow along with this program, you will need the Pulumi CLI installed and AWS credentials configured.

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

// Create an EKS cluster.
const cluster = new eks.Cluster("my-cluster");

// Export the cluster's kubeconfig.
export const kubeconfig = cluster.kubeconfig.apply(JSON.stringify);

// Create a Kubernetes provider instance that uses our cluster from above.
const provider = new k8s.Provider("provider", {
    kubeconfig: cluster.kubeconfig,
});

// Add the Helm repository (replace with the actual repository if necessary).
const repo = "webrtc-observer-repo";
const helmRepo = new k8s.helm.v3.Repository("myHelmRepo", {
    name: repo,
    url: "https://webrtc-observer-helm-repo", // Replace this with the actual Helm repo URL
}, { provider });

// Install webrtc-observer Helm chart
const webrtcObserverChartVersion = "1.0.0"; // Replace with the desired chart version
const webrtcObserverRelease = new k8s.helm.v3.Chart("webrtc-observer", {
    chart: "webrtc-observer",
    version: webrtcObserverChartVersion,
    fetchOpts: {
        repo: pulumi.interpolate`${helmRepo.url}`,
    },
}, { provider, dependsOn: [helmRepo] });

// Export the name of the cluster and the Helm chart release name
export const clusterName = cluster.eksCluster.name
export const webrtcObserverReleaseName = webrtcObserverRelease.status.name;

```

In this program:

- We import the necessary Pulumi packages for working with an EKS cluster and Kubernetes resources.
- We create an EKS cluster named `"my-cluster"` using the `@pulumi/eks` package. This will handle setting up all the necessary AWS resources.
- The `kubeconfig` is exported, allowing you to connect to your cluster using `kubectl` if you need to manually manage resources.
- We create a Kubernetes Provider `provider` that is hooked up to the newly created EKS cluster.
- We add a new Helm chart repository that should contain the `webrtc-observer` Helm chart. Make sure to substitute the `url` with the actual Helm repository URL.
- We then declare a Helm chart resource, specifying the chart name, the chart version, and pointing to the previously declared Helm repository.
- We also export the cluster name and the name of the Helm release which can be used for reference.

Please note that EKS charges for the resources you provision, so make sure to clean up resources if you are running this code in a production environment to avoid unnecessary costs.

To execute this program, run the following commands:

```bash
pulumi stack init dev                     # Initialize a new stack called 'dev'
pulumi config set aws:region us-west-2    # Set the AWS region; replace with your preferred region
pulumi up                                 # Preview and deploy changes
```

After you have successfully deployed your application, be sure to monitor it to ensure it behaves as expected. If you need to make any changes to your application or its Kubernetes resources, you can modify the Pulumi program accordingly and run `pulumi up` again to apply the changes.