Deploy the kafka-topic-exporter helm chart on Kubernetes

Question

Pulumi · Accepted Answer

To deploy the `kafka-topic-exporter` Helm chart on Kubernetes using Pulumi, we will primarily use the `Chart` resource from Pulumi's Kubernetes provider. This resource allows us to deploy Helm charts to a Kubernetes cluster in a declarative manner.

Before you begin, you should have the following prerequisites in place:
- Pulumi CLI installed on your local machine.
- Kubernetes cluster up and running.
- Kubeconfig file configured to point to your Kubernetes cluster.
- Helm chart repository that contains the `kafka-topic-exporter` chart.

The Pulumi program outlined below will:
1. Set up a new Kubernetes provider instance using the current context from your kubeconfig.
2. Define a `Chart` resource for the `kafka-topic-exporter` Helm chart, with configuration to set values or overrides as needed.

Here's a step-by-step TypeScript program to accomplish the deployment:

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

// This is where we create a new Helm chart instance.
// The Chart resource will install the kafka-topic-exporter Helm chart from the specified repository.
const kafkaTopicExporterChart = new k8s.helm.v3.Chart('kafka-topic-exporter', {
    chart: 'kafka-topic-exporter',
    version: 'chart-version', // Specify the chart version you want to deploy
    fetchOpts: {
        repo: 'https://your-helm-chart-repo', // Replace with the actual chart repository URL
    },
    // Values in the `values` object override the default chart values.
    // For example, if you need to specify the Kafka broker service details,
    // you can set them inside the values block like below.
    values: {
        kafka: {
            service: {
                // Service details for the Kafka broker, adjust as required.
                brokers: 'kafka:9092',
            },
        },
        // Other required chart values can go here
    },
});

// When the program runs, it will apply the `kafka-topic-exporter` Helm chart into the Kubernetes cluster.
// You can access any exported properties through the `kafkaTopicExporterChart` variable.
```

Please replace `chart-version`, and `https://your-helm-chart-repo` with the respective chart version and Helm chart repository URL that hosts the `kafka-topic-exporter` chart.

As you can see, we don't need to manually handle Helm CLI commands — Pulumi takes care of interpreting and applying the Helm chart for us directly from our code.

Keep in mind this is a basic example. The configuration may vary depending on the specifics of the `kafka-topic-exporter` chart and your service requirements, such as custom configurations, namespaces, and so on. You should review the `values.yaml` file of the `kafka-topic-exporter` Helm chart and adjust the `values` object in the code accordingly to fit your needs.

After writing this Pulumi program, you would run it using the Pulumi CLI:
1. Navigate to the directory where this file is saved.
2. Run `pulumi up` to preview and deploy the changes to your cluster.

The Pulumi CLI outputs the progress and results of the deployment, and if everything is configured correctly, it will successfully deploy the `kafka-topic-exporter` Helm chart to your cluster.