Deploy the ignite helm chart on Digital Ocean Kubernetes Service

Question

Pulumi · Accepted Answer

To deploy the Ignite Helm chart on the DigitalOcean Kubernetes Service (DOKS), you will need to perform the following high-level tasks:

1. Set up and configure a Kubernetes cluster in DigitalOcean.
2. Install and configure Helm.
3. Deploy the Ignite Helm chart onto the Kubernetes cluster.

We will use Pulumi to manage and deploy these resources. Pulumi is an infrastructure as code tool that allows you to define your infrastructure using familiar programming languages.

### Step 1: Set up a DigitalOcean Kubernetes Cluster

We will begin by setting up a DigitalOcean Kubernetes cluster using Pulumi's DigitalOcean provider. You need to have your DigitalOcean token handy, which should be set in your environment variables as `DIGITALOCEAN_TOKEN`.

In this step, we will define a Kubernetes cluster with a designated node pool.

### Step 2: Install and Configure Helm

Once we have the Kubernetes cluster provisioned, we will install Helm, which is a package manager for Kubernetes that allows you to deploy applications easily. We'll use Pulumi's Kubernetes provider, which abstracts the Helm functionality through the `Chart` resource.

### Step 3: Deploy the Ignite Helm Chart

Finally, we'll deploy the Ignite Helm chart onto our Kubernetes cluster. This will set up Ignite according to the chart's specifications. You can customize the deployment using the `values` parameter in the Helm chart resource.

Now, let's write the Pulumi program in TypeScript to accomplish these. This program assumes that Pulumi is already installed, and you've logged in to your DigitalOcean account using the Pulumi CLI.

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

// Create a DigitalOcean VPC for the Kubernetes cluster
const vpc = new digitalocean.Vpc("ignite-vpc", {
    region: digitalocean.Regions.NYC3, // You can choose your preferred region.
});

// Create a DigitalOcean Kubernetes cluster
const cluster = new digitalocean.KubernetesCluster("ignite-cluster", {
    region: vpc.region,
    version: "latest", // Use the latest available version
    nodePool: {
        name: "default-pool",
        size: digitalocean.DropletSlugs.DropletS2VCPU2GB, // Node size, change as necessary.
        nodeCount: 3, // Number of nodes in the pool.
        tags: ["ignite-cluster-pool"],
    },
    vpcUuid: vpc.id,
});

// Export the cluster kubeconfig
export const kubeconfig = cluster.kubeConfigs[0].rawConfig;

// Create a K8s provider instance using the kubeconfig from DigitalOcean
const k8sProvider = new k8s.Provider("k8s-provider", {
    kubeconfig: cluster.kubeConfigs[0].rawConfig,
});

// Deploy the Ignite Helm chart using the Helm Chart resource
const igniteChart = new k8s.helm.v3.Chart("ignite", {
    chart: "ignite",
    version: "1.0.0", // Specify the version of Ignite Chart you want to deploy
    fetchOpts: {
        repo: "https://path-to-ignite-helm-repo", // Replace with the actual Ignite Helm repo URL.
    },
}, { provider: k8sProvider });

// Export the name of the cluster
export const igniteClusterName = cluster.name;

// Export the Helm chart status
export const igniteChartStatus = igniteChart.status;
```

This program performs the following:

- Defines a new DigitalOcean VPC for the Kubernetes cluster to reside in.
- Provisions a new DigitalOcean Kubernetes cluster with a default node pool using `digitalocean.KubernetesCluster`.
- Exports the kubeconfig of the cluster for future use.
- Creates a new Kubernetes provider instance using kubeconfig from the DigitalOcean cluster so that Pulumi can communicate with your cluster.
- Deploys the Ignite Helm chart to the cluster using Pulumi's `k8s.helm.v3.Chart` resource.

Once you have this program ready, you can deploy it using the Pulumi CLI:

1. Save the above code in a file named `Pulumi.ts`.
2. Run `pulumi up` in your terminal in the same directory as the file.
3. Pulumi will show you a preview of what will be deployed. If everything looks good, confirm, and Pulumi will proceed with the deployment.

Remember to find the correct Ignite Helm chart repository URL and include it in the fetchOpts to point Pulumi to the correct location. Also, you can customize the chart deployment by modifying the `values` parameter in the Helm chart resource.