Deploy the swr-cache-proxy helm chart on Digital Ocean Kubernetes Service

Question

Pulumi · Accepted Answer

To deploy a Helm chart on Digital Ocean Kubernetes Service using Pulumi, there are several key steps we need to implement in our program:

1. **Create a Kubernetes Cluster:** We utilize the DigitalOcean provider for Pulumi to create a Kubernetes cluster. We'll need to specify the desired settings for our cluster, like the region, version, and node pool configuration.

2. **Deploy a Helm Chart:** After the Kubernetes cluster is provisioned, we use the Helm Chart resource from the Kubernetes provider to deploy `swr-cache-proxy` to our cluster. The Helm Chart resource allows us to specify the chart details, version, and any additional configuration we want to pass to the chart.

For the sake of this example, let's assume that the `swr-cache-proxy` helm chart we want to deploy is available in a public Helm repository. If it's in a private repository or requires specific configurations, you'll need to adjust the code accordingly.

Below is a detailed Pulumi TypeScript program that accomplishes the above steps. Please ensure you have Pulumi CLI installed and configured accordingly with Digital Ocean tokens for authentication.

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

// Step 1: Create a new Digital Ocean Kubernetes cluster.
const cluster = new digitalocean.KubernetesCluster("do-cluster", {
    // Replace with the desired settings for your cluster.
    region: "nyc1",
    version: "latest", // Use a specific version or "latest"
    nodePool: {
        name: "default",
        size: "s-2vcpu-2gb", // The slug identifier for the Droplet size
        nodeCount: 2, // Number of nodes in the pool
    },
});

// Step 2: Deploy the 'swr-cache-proxy' helm chart
const swrCacheProxyChart = new k8s.helm.v3.Chart("swr-cache-proxy", {
    chart: "swr-cache-proxy",
    // Specify the repository url if the chart is in a custom repository.
    // Assumes 'swr-cache-proxy' is available in the configured Helm repo on your cluster.
    version: "1.0.0", // Use the version number of the chart
    namespace: "default", // The namespace to deploy into
    // You can specify any additional configuration values here as necessary.
    values: {
        // The configuration values for the chart.
    },
}, { provider: new k8s.Provider("k8s-provider", { kubeconfig: cluster.kubeConfigs[0].rawConfig }) });

// Export the cluster's kubeconfig and the name of the service
export const kubeconfig = cluster.kubeConfigs[0].rawConfig;
export const serviceName = swrCacheProxyChart.getResourceProperty("v1/Service", "swr-cache-proxy", "metadata").name;

```

In this program:

- We create a Kubernetes cluster in Digital Ocean using the `digitalocean.KubernetesCluster` class ([docs](https://www.pulumi.com/registry/packages/digitalocean/api-docs/kubernetescluster/)). We specify the region, the Kubernetes version, and details about the node pool, such as the size and number of nodes.
  
- We then define a Pulumi Kubernetes provider using the kubeconfig of the newly created DigitalOcean cluster, which enables us to interact with the cluster.

- Finally, we deploy the `swr-cache-proxy` Helm chart using the `k8s.helm.v3.Chart` class ([docs](https://www.pulumi.com/registry/packages/kubernetes/api-docs/helm/v3/chart/)). We specify the chart name and version. Here, we've also specified the namespace to be `default`. If your Helm chart requires custom values, you can pass them in the `values` object.

In the end, we export the cluster's kubeconfig and the service name that corresponds to the `swr-cache-proxy` deployment, which allows us to interact with the Kubernetes cluster and the deployed service.

Remember to run `npm install` to install the necessary Pulumi packages for your project before attempting to deploy with `pulumi up`.