Deploy the redis-cache helm chart on Digital Ocean Kubernetes Service

Question

Pulumi · Accepted Answer

To deploy the `redis-cache` Helm chart on a Digital Ocean Kubernetes Service using Pulumi, you'll need to perform the following steps:

1. **Set up a DigitalOcean Kubernetes Cluster**: You'll first need to create a Kubernetes cluster in DigitalOcean.
2. **Install the Redis Cache Helm chart**: After setting up the cluster, use the Helm package manager to install the `redis-cache` chart.

I'll guide you through the process with a Pulumi program written in TypeScript.

### Step 1 - Configure the Pulumi Kubernetes Provider for DigitalOcean

Before you can deploy applications on your Kubernetes cluster, you need to configure the Pulumi Kubernetes provider to use the credentials for your DigitalOcean Kubernetes cluster. Pulumi uses these credentials to authenticate with your cluster and manage resources.

### Step 2 - Deploy the Redis Cache Helm Chart

We'll use Pulumi's Kubernetes provider to deploy the Helm chart. For the Helm chart, we'll refer to a known repository that hosts the `redis` chart such as Bitnami which often provides the `redis` chart that could be used as a `redis-cache`. We'll assume there's a chart named `redis-cache` for this deployment.

Below is the Pulumi program written in TypeScript that performs these steps. The comments in the code will guide you through what each section does:

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

// Step 1: Create a DigitalOcean Kubernetes cluster
const cluster = new digitalocean.KubernetesCluster("do-cluster", {
    region: "nyc1",
    version: "latest", // or specify your desired version
    nodePool: {
        name: "default",
        size: "s-1vcpu-2gb", // choose the node size that fits your needs
        nodeCount: 2, // number of nodes in the node pool
    },
});

// Step 2: Deploy the redis-cache Helm chart on the cluster
const redisCacheChart = new k8s.helm.v3.Chart("redis-cache", {
    chart: "redis",
    version: "10.5.7", // choose a version of the Helm chart
    fetchOpts: {
        repo: "https://charts.bitnami.com/bitnami",
    },
    values: {
        // Customize the Helm chart values here, or leave it empty to use default values
        // Example:
        // usePassword: false
    },
}, { provider: new k8s.Provider("do-k8s", { kubeconfig: cluster.kubeConfigs[0].rawConfig }) });

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

// Export the Redis service endpoint
export const redisHost = redisCacheChart.getResourceProperty("v1/Service", "redis-cache-master", "status").apply(status => status.loadBalancer.ingress[0].ip);
```

*Note: The provided values for the Helm chart are for illustrative purposes. Adjust them according to the actual `redis-cache` chart's values.*

### How to Run the Program

Save the above script to a file, such as `index.ts`. Then, use the following Pulumi CLI commands from the same directory:

- Run `pulumi up` to preview and deploy the changes. Confirm the deployment when prompted to create the DigitalOcean Kubernetes cluster and install the `redis-cache` Helm chart.
- Run `pulumi stack output kubeconfig` to retrieve the kubeconfig for your newly created Kubernetes cluster.
- Run `pulumi stack output redisHost` to retrieve the Redis service endpoint once the deployment is complete.

Make sure you have already setup Pulumi and have the appropriate DigitalOcean authentication configured for Pulumi to interact with your DigitalOcean account.

Congratulations! You've successfully deployed the `redis-cache` Helm chart on a DigitalOcean Kubernetes cluster using Pulumi.