Deploy the helm-snowplow helm chart on Digital Ocean Kubernetes Service

Question

Pulumi · Accepted Answer

To deploy the `helm-snowplow` Helm chart on the Digital Ocean Kubernetes Service, you'll first need a Kubernetes cluster. We'll use Pulumi to create a Digital Ocean Kubernetes (DOKS) cluster and then deploy the Snowplow Helm chart to that cluster. Here's a step-by-step guide on how to do it:

1. **Create a Digital Ocean Kubernetes Cluster**: The `digitalocean.KubernetesCluster` resource is used to provision a Kubernetes cluster on Digital Ocean. You'll define the cluster name, region, version, and other specifics like node pool configuration.

2. **Install the Helm Chart**: Once the cluster is provisioned, you use the `kubernetes.helm.v3.Chart` resource to specify the Helm chart that you want to deploy, which in this case is `helm-snowplow`. Pulumi works with existing Helm charts, and you can provide any values required by the chart through the `values` property.

Below is a Pulumi program written in TypeScript that accomplishes these steps:

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

// Step 1: Provision a Digital Ocean Kubernetes Cluster.
const cluster = new digitalocean.KubernetesCluster('do-cluster', {
    // Specify the region where your cluster will be created.
    region: 'nyc3', 
    // Specify the version of Kubernetes you'd like to use.
    version: '1.21.5-do.0', 
    // Define the node pool for the cluster.
    nodePool: {
        name: 'do-pool',
        size: 's-2vcpu-2gb', 
        nodeCount: 2, // The number of nodes in the pool.
    },
});

// Once the Kubernetes cluster is up, you'll need to configure kubectl to communicate with it.
// Pulumi automatically generates kubeconfig files for clusters. 
const kubeconfig = cluster.kubeConfigs[0].rawConfig.apply(c => JSON.stringify(c));

// Step 2: Deploy the Snowplow Helm chart to the cluster using the Pulumi Kubernetes provider.
const helmChart = new kubernetes.helm.v3.Chart('helm-snowplow', {
    // Set the Pulumi Kubernetes provider to point at the newly created cluster.
    fetchOpts: { repo: 'https://helm.snowplowanalytics.com' },
    // The name of the chart you want to deploy.
    chart: 'snowplow', 
    // Passing in the kubeconfig generated from the Digital Ocean Kubernetes Cluster resource.
    values: {
        // You would define any additional configuration values required or desired for your 
        // Snowplow deployment here. Below you can find an example configuration value for 
        // setting up a Postgres database (replace with your actual values).
        postgresql: {
            enabled: true,
            postgresqlUsername: 'postgres',
            postgresqlPassword: 'your-db-password',
            postgresqlDatabase: 'snowplow',
        },
    },
}, { provider: new kubernetes.Provider('k8s-provider', { kubeconfig }) });

// Export the cluster's kubeconfig and the Helm chart deployment status.
export const kubeconfigOutput = kubeconfig;
export const helmChartStatus = helmChart.status;

```

This program performs the following:

- Provisions a new Digital Ocean Kubernetes cluster with a specified node size and count.
- Deploys the `helm-snowplow` Helm chart to the cluster.

Make sure to replace the `postgresql` values with your actual configuration for Snowplow to connect to the database.

To run this program, save the code to a file with a `.ts` extension, for example, `deploy-snowplow.ts`. Then, you can use Pulumi CLI commands to create a new stack (`pulumi stack init`), set the Digital Ocean token (`pulumi config set digitalocean:accessToken <YOUR_TOKEN>`), review the deployment plan (`pulumi preview`), and finally deploy it (`pulumi up`). Ensure you have Pulumi and the required dependencies installed before running these commands.

After running `pulumi up`, the output will include the kubeconfig necessary to access your Digital Ocean Kubernetes cluster, and you can use that with `kubectl` or any Kubernetes management tool of your choice to interact with your cluster.