Deploy the ibm-db2 helm chart on Digital Ocean Kubernetes Service

Question

Pulumi · Accepted Answer

To deploy the IBM DB2 Helm chart on the Digital Ocean Kubernetes Service using Pulumi, we need to follow a series of steps that involve setting up the Kubernetes cluster on Digital Ocean, and then using the Helm chart to deploy the IBM DB2 database.

Here's a general outline of the steps we'll take:

1. Define a new Digital Ocean Kubernetes Cluster resource using the `digitalocean.KubernetesCluster` resource.
2. Use the `kubernetes.helm.sh/v3.Chart` resource to specify our Helm chart deployment, targeting the cluster we've just created.

Make sure you have Pulumi and the necessary cloud provider CLI tools installed and configured:

- Pulumi CLI
- DigitalOcean CLI, `doctl`
- Helm CLI (if needed for local chart inspection or customization)
- Configure your DigitalOcean token with Pulumi using `pulumi config set digitalocean:token YOUR_TOKEN_HERE`

Now let's go through the details in code. We'll write our program in TypeScript to define and deploy these resources.

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

// Step 1: Provision a new DigitalOcean Kubernetes cluster.
const cluster = new digitalocean.KubernetesCluster("do-cluster", {
    region: "nyc1",
    version: "latest", // Specify your desired Kubernetes version.
    nodePool: {
        name: "default",
        size: "s-2vcpu-2gb", // Size of the Droplets (nodes) in the node pool.
        nodeCount: 2, // Number of Droplets to create in the node pool.
    },
});

// Step 2: Use a Helm chart to deploy IBM DB2 on the cluster.
const db2Chart = new k8s.helm.v3.Chart("ibm-db2", {
    // This is a placeholder repository; you'll need to replace it with the actual IBM DB2 Helm chart details.
    // If the Helm chart is hosted in a private repository, you'll need to provide 'repo' and 'fetchOpts' parameters.
    chart: "ibm-db2",
    version: "11.5.0.0", // Specify the chart version you wish to deploy. This is an example version.
    namespace: "default",
}, { provider: new k8s.Provider("k8s-provider", { kubeconfig: cluster.kubeConfigs[0].rawConfig }) });

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

// After running pulumi up, the above program will deploy the specified Kubernetes cluster and IBM DB2 Helm chart.
```

Before you run `pulumi up` with the above code, replace the placeholder repository and version with the actual values for the IBM DB2 Helm chart. The digitalocean token should be configured through the Pulumi CLI, and the proper Helm chart repository must be used.

In this program:

- We create a DigitalOcean Kubernetes cluster with a specified node size and count.
- We then deploy a Helm chart for IBM DB2, using `k8s.helm.sh/v3.Chart` from the Pulumi Kubernetes provider.
- We assume the IBM DB2 Helm chart is publicly available. If it's in a private repository, you'd need to supply the appropriate `repo` and `fetchOpts` to access the chart.
- We export the `kubeconfig` file that can be used to interact with your Kubernetes cluster via `kubectl` or any other Kubernetes management tool.

Remember to install and configure the Pulumi CLI and DigitalOcean CLI before attempting to run this code. You will also need to login to your Pulumi account using `pulumi login`.

Once everything is set up, you can run `pulumi up` to deploy this infrastructure. Pulumi will provide you with a preview of the resources that will be created and, if everything looks correct, you can proceed to confirm the changes. After the deployment is completed, Pulumi will output the cluster's `kubeconfig` which you can use to interact with your Kubernetes cluster.

This is a basic setup and might require additional configurations, like setting up DigitalOcean VPCs, firewall rules, or additional Helm chart configuration parameters based on your exact requirements for the IBM DB2 database deployment.