Deploy the traefik2 helm chart on Digital Ocean Kubernetes Service

Question

Pulumi · Accepted Answer

To deploy the `traefik2` Helm chart on the DigitalOcean Kubernetes Service (DOKS), we'll use Pulumi to automate the creation of a Kubernetes cluster on DigitalOcean, followed by the installation of the `traefik2` Helm chart onto that cluster.

We'll break down the process into these steps:
1. Create a Kubernetes cluster on DigitalOcean.
2. Deploy the `traefik2` Helm chart to the cluster.

Here's how you can accomplish this using Pulumi with TypeScript:

### Step 1: Create a Kubernetes Cluster on DigitalOcean

First, we need a Kubernetes cluster. We will create a new cluster on DigitalOcean using the `digitalocean.KubernetesCluster` resource, which represents a Kubernetes cluster in the DigitalOcean cloud.

### Step 2: Install the `traefik2` Helm Chart

After the cluster is up and running, we will install the `traefik2` Helm chart. To manage Helm charts, Pulumi provides the `kubernetes.helm.v3.Chart` resource. This allows us to specify the chart we want to install along with any configuration values it requires.

Here's the complete Pulumi program that performs both of these steps:

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

// Step 1: Creating a Kubernetes cluster on DigitalOcean
const cluster = new digitalocean.KubernetesCluster('do-cluster', {
    region: 'nyc3', // NYC3 is one of the available DigitalOcean region
    version: 'latest', // Specify the Kubernetes version, 'latest' will use the latest available version
    nodePool: {
        name: 'default-pool',
        size: 's-2vcpu-2gb', // This is the size of the instance, s-2vcpu-2gb is one of the available sizes
        nodeCount: 2, // Number of nodes in the node pool
    },
});

// Export the kubeconfig to access the cluster using kubectl and other tools
export const kubeconfig = cluster.kubeConfigs.apply((kubeConfigs) => kubeConfigs[0].rawConfig);

// Step 2: Install the `traefik2` Helm chart on the cluster
const traefikChart = new kubernetes.helm.v3.Chart('traefik2', {
    chart: 'traefik',
    version: '9.18.2', // Specify the version of the chart, make sure to use an appropriate version for traefik2
    fetchOpts: {
        repo: 'https://helm.traefik.io/traefik', // The repository URL where the chart can be found
    },
}, { provider: new kubernetes.Provider('k8s-provider', { kubeconfig }) });

// Run the following command to access the traefik dashboard once deployed:
// kubectl --kubeconfig kubeconfig-file.yaml port-forward $(kubectl --kubeconfig kubeconfig-file.yaml get pods --namespace default -l "app.kubernetes.io/name=traefik" -o name) 9000:9000
```

### Explanation

In this program, we import the `@pulumi/digitalocean` and `@pulumi/kubernetes` dependencies to work with resources provided by DigitalOcean and the Kubernetes package respectively.

1. We create a `digitalocean.KubernetesCluster` named `'do-cluster'` with a specified region, Kubernetes version, and node pool configuration. You may choose an available and preferred region, like `'nyc3'` for a data center in New York.

2. We export the kubeconfig of our DigitalOcean Kubernetes cluster. This kubeconfig is necessary to interact with the Kubernetes cluster created on DigitalOcean. The `kubeConfigs` property of a `digitalocean.KubernetesCluster` object includes raw kubeconfig, which we access using `.apply()`.

3. We create a `kubernetes.helm.v3.Chart` named `'traefik2'`. The `chart` parameter specifies the name of the Helm chart ('traefik'), and `version` ensures we're using a specific chart version compatible with `traefik2`. The `repo` under `fetchOpts` is where Helm looks for the chart.

4. We create a new instance of `kubernetes.Provider`, passing the kubeconfig of our DigitalOcean Kubernetes cluster. This provider instance allows Pulumi to interact with the Kubernetes cluster and is used when deploying the Helm chart.

5. Additionally, there's a comment at the end of the program indicating the commands you can run to forward the Traefik dashboard port to your local machine and access the Traefik dashboard. Make sure to replace `kubeconfig-file.yaml` with the actual filename of the downloaded kubeconfig file.

Keep in mind that the version string '9.18.2' in the `traefik` chart is used as an example, and you should use the latest chart version compatible with traefik2 from the [official Traefik Helm repository](https://containo.us/traefik/).

Before running the program, ensure you have the Pulumi CLI installed and configured for use with your DigitalOcean account.

To run this Pulumi program, save it to a TypeScript file (e.g., `index.ts`). Install the necessary Pulumi packages by running `npm install` and execute it with `pulumi up`. This will provision the cluster and deploy `traefik2` on it.

Deploy the traefik2 helm chart on Digital Ocean Kubernetes Service

Step 1: Create a Kubernetes Cluster on DigitalOcean

Step 2: Install the traefik2 Helm Chart

Explanation

Step 2: Install the `traefik2` Helm Chart