Deploy the minio-standalone helm chart on Digital Ocean Kubernetes Service

Question

Pulumi · Accepted Answer

To deploy the MinIO standalone Helm chart on a DigitalOcean Kubernetes Service (DOKS) cluster using Pulumi, you will need to follow a few steps. The Pulumi program I'm going to share will accomplish the following:

1. Create a new DOKS cluster on DigitalOcean.
2. Deploy the MinIO Helm chart on the newly created Kubernetes cluster.

We'll use Pulumi's DigitalOcean and Kubernetes packages to manage resources on DigitalOcean and deploy the Helm chart to the cluster.

### Prerequisites

Ensure that you have the following installed and configured:

- Pulumi CLI
- DigitalOcean Access Token (required to authenticate with your DigitalOcean account)
- Helm CLI (if you want to customize values or templates)

#### Step 1: Set up the Pulumi Project

Before running the Pulumi program, initialize a new Pulumi project and install the necessary packages.

```bash
pulumi new typescript
```

Install the DigitalOcean and Kubernetes Pulumi packages:

```bash
npm install @pulumi/digitalocean @pulumi/kubernetes
```

#### Step 2: Write the Pulumi Program

Here's the complete Pulumi program written in TypeScript that deploys the MinIO Helm chart on a DOKS cluster:

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

// Create a DigitalOcean Kubernetes cluster.
const cluster = new digitalocean.KubernetesCluster("my-doks", {
    region: "nyc3",
    version: "1.21.5-do.0",
    nodePool: {
        size: "s-2vcpu-2gb",
        name: "default",
        nodeCount: 2,
    },
});

// Create a Kubernetes provider instance using the DOKS cluster credentials.
const k8sProvider = new kubernetes.Provider("k8s", {
    kubeconfig: cluster.kubeConfigs[0].rawConfig,
});

// Deploy the MinIO Helm chart using the Kubernetes provider.
const minioChart = new kubernetes.helm.v3.Chart("minio", {
    chart: "minio",
    namespace: "default",
    version: "8.0.10", // Specify the chart version you want to deploy
    fetchOpts:{
        repo: "https://helm.min.io/",
    },
}, { provider: k8sProvider });

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

#### Explanation

1. We create a new DigitalOcean Kubernetes cluster by instantiating `digitalocean.KubernetesCluster`. This sets up a new cluster in the specified region with the given node size and count. ([DigitalOcean.KubernetesCluster](https://www.pulumi.com/registry/packages/digitalocean/api-docs/kubernetescluster/))

2. Next, we create a Pulumi Kubernetes provider that uses the kubeconfig from the newly created DOKS cluster. This provider is necessary to interact with your Kubernetes cluster. ([Kubernetes Provider](https://www.pulumi.com/registry/packages/kubernetes/api-docs/provider/))

3. We then declare a Helm chart resource, `kubernetes.helm.v3.Chart`, representing the MinIO Helm chart. The `chart` argument specifies MinIO, and `fetchOpts.repo` points to MinIO's Helm chart repository. The provider associated with this Helm chart is our newly created k8sProvider, which ensures that the Helm chart will be deployed to the DOKS cluster we created earlier. ([Helm Chart](https://www.pulumi.com/registry/packages/kubernetes/api-docs/helm/v3/chart/))

4. Finally, we export the kubeconfig of the cluster, which can be used with `kubectl` or other Kubernetes tools to interact with your cluster.

5. The `version` field is optional, but it's a good practice to specify which version of the Helm chart you want to deploy to avoid surprises if the chart is updated.

#### Running the Program

To run the program, execute the following commands:

```bash
pulumi up
```

This command will preview the changes and prompt for confirmation before provisioning resources on DigitalOcean and deploying the MinIO Helm chart.

After deployment, you'll be able to see the kubeconfig output on the console, which you can use with `kubectl` to interact with your cluster and check the status of your MinIO deployment.

To clean up the resources, you can run the following command:

```bash
pulumi destroy
```

This command will remove all resources that were created, including the DigitalOcean Kubernetes cluster and MinIO Helm release.