Deploy the uptime-bot helm chart on Digital Ocean Kubernetes Service

Question

Pulumi · Accepted Answer

To deploy the `uptime-bot` Helm chart on the Digital Ocean Kubernetes Service using Pulumi, you will need to follow these steps:

1. Set up a new Pulumi project and configure it to use DigitalOcean as the cloud provider.
2. Create a new Kubernetes cluster on DigitalOcean.
3. Configure Pulumi to use the Kubernetes provider to deploy resources to the newly created cluster.
4. Use Pulumi's native Helm chart support to deploy the `uptime-bot` chart into the cluster.

Below is a Pulumi program written in TypeScript that demonstrates how to accomplish this. The program uses the `@pulumi/digitalocean` and `@pulumi/kubernetes` packages to create a DigitalOcean Kubernetes cluster and deploy a Helm chart to it, respectively.

First, you need to install the necessary dependencies:

```bash
# Install Pulumi CLI and set up the environment if you haven't already
# Install Node.js and npm if you haven't already

# Create a new Pulumi project
pulumi new typescript -y

# Now install the DigitalOcean Pulumi provider
npm install @pulumi/digitalocean

# Install the Kubernetes Pulumi provider
npm install @pulumi/kubernetes
```

Here is the Pulumi TypeScript program:

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

// Define the DigitalOcean Kubernetes cluster.
const cluster = new digitalocean.KubernetesCluster('do-cluster', {
    region: 'nyc1', // Choose the region that is appropriate for you
    version: 'latest', // Use the latest available version of Kubernetes
    nodePool: {
        name: 'default',
        size: 's-2vcpu-2gb', // This is the smallest size for testing purposes
        nodeCount: 1, // Start with one node
    },
});

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

// Set up the Kubernetes provider to deploy the Helm chart to the new cluster.
const k8sProvider = new kubernetes.Provider('k8s-provider', {
    kubeconfig: cluster.kubeConfigs[0].rawConfig,
});

// Deploy the `uptime-bot` Helm chart using the Kubernetes provider.
const uptimeBotChart = new kubernetes.helm.v3.Chart('uptime-bot-chart', {
    chart: 'uptime-bot',
    // You would specify the repository opts if the chart is not from the stable repository
    // For example:
    // repositoryOpts: {
    //     repo: "http://charts.mycompany.com/"
    // },
    values: {
        service: {
            type: 'ClusterIP',
        },
    },
}, { provider: k8sProvider });

// Export the endpoint of the `uptime-bot` service.
export const uptimeBotServiceEndpoint = uptimeBotChart.getResourceProperty(
    'v1/Service', 'uptime-bot-uptime-bot', 'spec').apply(spec => `http://${spec.clusterIP}`);

```

This program does the following:

- Imports the required libraries for Pulumi, DigitalOcean, and Kubernetes.
- Defines a new Kubernetes cluster on DigitalOcean, specifying the region, Kubernetes version, and node details like size and count.
- Exports the `kubeconfig` of the created cluster, which provides the necessary information to connect to the cluster.
- Creates a Kubernetes provider instance configured to use the `kubeconfig` of the newly created DigitalOcean Kubernetes cluster.
- Deploys the `uptime-bot` Helm chart to the cluster. It sets up the `service` as `ClusterIP` which makes it accessible within the cluster. Adjust the values based on the `uptime-bot` Helm chart's requirements.
- Exports the service endpoint which can be used to connect to the `uptime-bot` service.

Once you've set up your Pulumi project and written this code in `index.ts`, you can deploy your infrastructure by running:

```bash
pulumi up
```

Pulumi will show you a preview of the resources that will be created. If everything looks good, confirm the deployment by selecting `yes`.

Keep in mind that the specific values for service types, node sizes, and chart values might need to be adjusted based on your requirements and the specifics of the `uptime-bot` Helm chart.

Once the deployment is complete, you can use `pulumi stack output` to retrieve the exported endpoints and connect to your service:

```bash
pulumi stack output uptimeBotServiceEndpoint
```

In practice, you might want to deploy to namespaces or add more configurations based on the Helm chart values. The Helm chart name or repository might also change, so always verify the Helm chart details and adjust the Pulumi program accordingly.