Deploy the gnocchi helm chart on Digital Ocean Kubernetes Service

Question

Pulumi · Accepted Answer

To deploy the Gnocchi Helm chart on the Digital Ocean Kubernetes Service (DOKS), you'll need to perform the following high-level steps:

1. **Create a Kubernetes Cluster on DigitalOcean**: Establish the Kubernetes cluster infrastructure where your applications will run.
2. **Install Helm and Configure Deployment**: Helm is a package manager for Kubernetes which allows you to easily deploy applications and services. You'll use Helm to deploy the Gnocchi Helm chart.

Let's go through each of these steps one by one in Pulumi using TypeScript.

### Step 1: Set Up the Kubernetes Cluster

Firstly, you need to set up the Kubernetes cluster on DigitalOcean. The following Pulumi code creates a new Kubernetes cluster in the specified region with your chosen configuration:

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

// Create a Kubernetes cluster in DigitalOcean
const cluster = new digitalocean.KubernetesCluster("my-do-cluster", {
    region: "nyc1",             // Choose the region that is closest to you or your users
    version: "1.21.5-do.0",     // Use the version of Kubernetes available in DigitalOcean
    nodePool: {
        name: "default-pool",   // Name of the node pool
        size: "s-2vcpu-4gb",    // Size of the nodes (vCPUs and RAM)
        nodeCount: 2,           // Number of nodes to launch
    },
});

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

### Step 2: Install Helm and Deploy Gnocchi

After setting up the cluster, you'll need to deploy the Gnocchi Helm chart. To do this, you'll need to include the Helm package and deploy it into the created cluster.

The following code includes a Helm chart deployment:

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

// Create a new Helm Chart for Gnocchi
const gnocchiChart = new kubernetes.helm.v3.Chart("gnocchi", {
    chart: "gnocchi",
    version: "4.3.0",        // Specify the version of the Chart you wish to deploy
    fetchOpts: {
        repo: "https://helm.example.com/", // Replace with the actual Helm repository URL that contains Gnocchi
    },
}, { provider: new kubernetes.Provider("do-k8s", { kubeconfig: kubeConfig }) });

// Export the status of the deployed chart
export const chartStatus = gnocchiChart.status;
```

Make sure to replace `"https://helm.example.com/"` with the actual Helm chart repository URL where the Gnocchi chart is located.

### Put It All Together

Combining both steps gives you a complete program to set up a Kubernetes cluster and deploy the Gnocchi Helm chart on DigitalOcean:

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

// Create a Kubernetes cluster in DigitalOcean
const cluster = new digitalocean.KubernetesCluster("my-do-cluster", {
    region: "nyc1",
    version: "1.21.5-do.0",
    nodePool: {
        name: "default-pool",
        size: "s-2vcpu-4gb",
        nodeCount: 2,
    },
});

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

// Create a Kubernetes Provider instance using the cluster kubeconfig
const k8sProvider = new kubernetes.Provider("do-k8s-provider", {
    kubeconfig: kubeConfig,
});

// Create a new Helm Chart for Gnocchi
const gnocchiChart = new kubernetes.helm.v3.Chart("gnocchi", {
    chart: "gnocchi",
    version: "4.3.0",
    fetchOpts: {
        repo: "https://helm.example.com/",
    },
}, { provider: k8sProvider });

// Export the status of the deployed chart
export const chartStatus = gnocchiChart.status;
```

To execute the Pulumi program:

- Ensure you have Pulumi CLI installed and DigitalOcean token configured.
- Run `pulumi up` which will show a preview of the resources that will be created and ask for your confirmation to proceed with the deployment.

This code will efficiently instruct Pulumi to create the necessary infrastructure on DigitalOcean and deploy the Gnocchi Helm chart into the Kubernetes cluster. The output includes the `kubeConfig` to interact with your Kubernetes cluster and `chartStatus` to confirm the Helm chart's deployment status.

Remember to check the documentation for the available [DigitalOcean options](https://www.pulumi.com/registry/packages/digitalocean/api-docs/kubernetescluster/) and the [Kubernetes Helm Chart resource](https://www.pulumi.com/registry/packages/kubernetes/api-docs/helm/v3/chart/) as these will help you fine-tune your deployment according to your needs.