Deploy the alb-controller helm chart on Digital Ocean Kubernetes Service

Question

Pulumi · Accepted Answer

To deploy the `alb-controller` Helm chart on Digital Ocean Kubernetes Service, you will need to follow these steps:

1. **Create a Kubernetes cluster on Digital Ocean**: You will use the `digitalocean.KubernetesCluster` resource to provision a new Kubernetes cluster. You need to define the region, version, size, name, and other necessary configurations for your cluster.

2. **Install the Helm chart**: After setting up the cluster, you use the `kubernetes.helm.sh/v3.Chart` resource to deploy the `alb-controller` Helm chart to your cluster. Helm charts are packages that contain pre-configured Kubernetes resources, which allow you to deploy applications or services to a Kubernetes cluster more easily.

Below is the TypeScript program for Pulumi which does both steps:

- Starts by importing necessary packages.
- Declares a Digital Ocean Kubernetes cluster.
- Deploys the `alb-controller` using the Helm chart resource.

Make sure you have Pulumi installed, are logged in (`pulumi login`), and have the Digital Ocean provider configured with your access token.

Here is the code with detailed comments explaining each part:

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

// Create a Digital Ocean Kubernetes cluster.
const cluster = new digitalocean.KubernetesCluster('do-cluster', {
    // Specify the region where the cluster will be created
    region: digitalocean.Regions.NYC1,
    
    // Specify the version of Kubernetes to use for the cluster
    // You can get a list of available versions using `doctl kubernetes options versions`
    version: 'latest_do_kubernetes',
    
    // Define the node pool for the cluster
    nodePool: {
        name: 'default',
        size: digitalocean.DropletSlugs.DropletS2VCPU2GB,
        nodeCount: 2, // Specify the desired number of nodes in the node pool
    },
});

// Deploy the alb-controller Helm chart to the cluster.
const albControllerChart = new k8s.helm.v3.Chart('alb-controller-chart', {
    chart: 'alb-controller',
    // You might need to specify the Helm repository here, for example:
    // repo: "https://helm-repository-url/",
    // Specify the version of the chart you want to deploy, or omit for the latest
    // version: "1.2.3",
    values: {
        // Specify any values that you want to override from the default Helm chart values
        // e.g., enable/disable certain features, configure resources, etc.
    },
}, { provider: new k8s.Provider('k8s-provider', { kubeconfig: cluster.kubeConfigs[0].rawConfig }) });

// Export the cluster properties
export const kubeconfig = cluster.kubeConfigs[0].rawConfig;
export const clusterName = cluster.name;
export const clusterEndpoint = cluster.endpoint;

// After running `pulumi up`, this code will provision a Digital Ocean Kubernetes cluster
// and deploy the alb-controller Helm chart onto it. You can use the exported kubeconfig
// to interact with the cluster using `kubectl`.
```

To run this code, you will save it to a file `index.ts` for example, and then run `pulumi up`. Pulumi will then perform the deployment on Digital Ocean, creating the Kubernetes cluster and configuring the `alb-controller` Helm chart.

Remember that the `alb-controller` Helm chart may require specific configuration values to work as intended. You will need to consult the chart's documentation for the necessary details and modify the `values` object in the chart resource accordingly.