Deploy the smalland helm chart on Digital Ocean Kubernetes Service

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Pulumi · Accepted Answer

### Deploying a Helm Chart on Digital Ocean Kubernetes Service using Pulumi

To deploy a Helm chart to a Digital Ocean Kubernetes Service with Pulumi, we will complete the following steps:

1. **Set up a Digital Ocean Kubernetes Cluster**: This is a group of nodes, which are individual virtual machines, that run containerized applications managed by Kubernetes.

2. **Configure Kubernetes Provider**: This allows Pulumi to interact with the Kubernetes cluster.

3. **Deploy Helm Chart**: Helm charts help you define, install, and upgrade even the most complex Kubernetes applications.

Below is a Pulumi program that completes these steps using TypeScript.

#### Step 1: Set up a Digital Ocean Kubernetes Cluster

We will begin by creating a Kubernetes cluster in Digital Ocean. The `digitalocean.KubernetesCluster` resource facilitates the creation of a managed Kubernetes cluster on Digital Ocean's infrastructure.

#### Step 2: Configure Kubernetes Provider

Once our Digital Ocean Kubernetes Cluster has been created, we need to configure the Pulumi Kubernetes provider to connect to this new cluster. This provider is responsible for deploying and managing Kubernetes resources. Note that we need to retrieve the kubeconfig file from the created cluster to allow the Kubernetes provider to authenticate.

#### Step 3: Deploy the `smalland` Helm Chart

For the Helm chart deployment, we will use the `kubernetes.helm.v3.Chart` resource from Pulumi's Kubernetes provider. This resource enables you to deploy Helm charts into a Kubernetes cluster. To deploy the `smalland` Helm chart, you need to provide its repository details as well as any configuration values that the chart requires.

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

// Step 1: Create a Digital Ocean Kubernetes Cluster
const cluster = new digitalocean.KubernetesCluster("do-cluster", {
  // Define the region, version, and node pool configuration for your cluster
  region: "nyc1",
  version: "latest",
  nodePool: {
    name: "default",
    size: "s-1vcpu-2gb",
    nodeCount: 2, // Example: 2 worker nodes
  },
});

// Step 2: Configure the Kubernetes provider to connect to the created cluster
const provider = new kubernetes.Provider("k8s-provider", {
  kubeconfig: cluster.kubeConfigs.apply(kubeConfig => kubeConfig[0].rawConfig),
});

// Step 3: Deploy the `smalland` Helm chart in the Digital Ocean Kubernetes cluster
const smallandChart = new kubernetes.helm.v3.Chart("smalland-chart", {
  chart: "smalland",
  // If the chart is from a custom Helm repository, set the `repo` property
  // repo: "https://charts.example.com/",
  version: "1.0.0", // Replace with the specific version of the chart
  namespace: "default", // Define the namespace where the chart should be deployed
  // Set any values required by the Helm chart
  values: {
    // Examples of custom values
    service: {
      type: "LoadBalancer",
    },
  },
}, { provider }); // Pass the Kubernetes provider

// Export the cluster's kubeconfig
export const kubeconfig = cluster.kubeConfigs.apply(kubeConfig => kubeConfig[0].rawConfig);

// Export the public IP to access the `smalland` application if a LoadBalancer service is used
// The public IP would be assigned by the LoadBalancer created by the Helm chart.
export const appPublicIp = smallandChart
  .getResourceProperty("v1/Service", "smalland", "status")
  .apply(status => status.loadBalancer.ingress[0].ip);
```

In the program above:

- We create a Kubernetes cluster in the specified region with a specified node size and count.
- We then configure the Kubernetes provider with the kubeconfig of the newly created cluster.
- We deploy the `smalland` Helm chart using the Helm chart resource, specifying the chart name and version. Replace `1.0.0` with the actual chart version you intend to deploy.
- Lastly, we export the kubeconfig for our Kubernetes cluster, and if the `smalland` chart exposes a LoadBalancer service, we extract the public IP from the service status to access the deployed application.

**Note**: If the `smalland` Helm chart is hosted in a custom Helm repository, you would need to specify the `repo` URL where the chart can be found. Since you have mentioned that `smalland` is a Helm chart, I'm using a placeholder chart name `smalland` with a version `1.0.0`. You should replace these with the actual name and version or provide the repository URL if it's hosted on a custom Helm repository.

To execute this Pulumi program:
1. Ensure that you have the Pulumi CLI installed.
2. Set up the Digital Ocean provider by configuring the necessary tokens.
3. Run `pulumi up` to preview and deploy the changes. Pulumi will build the cloud resources as per the program defined.

After the deployment, you can use the exported `kubeconfig` to interact with your Kubernetes cluster via `kubectl`, and access your `smalland` application using the provided public IP, if applicable. Remember to check the Helm chart's documentation for specific values and configurations that may be needed for your deployment.

Deploy the smalland helm chart on Digital Ocean Kubernetes Service

Deploying a Helm Chart on Digital Ocean Kubernetes Service using Pulumi

Step 1: Set up a Digital Ocean Kubernetes Cluster

Step 2: Configure Kubernetes Provider

Step 3: Deploy the smalland Helm Chart

Step 3: Deploy the `smalland` Helm Chart