Deploy the prometheus-dnssec-exporter helm chart on Opensshift

Question

Pulumi · Accepted Answer

To deploy the `prometheus-dnssec-exporter` Helm chart on OpenShift using Pulumi, we will utilize the `kubernetes.helm.v3.Chart` resource from the Pulumi Kubernetes provider. This resource allows us to deploy Helm charts into a Kubernetes cluster managed by OpenShift.

Below is a step-by-step Pulumi TypeScript program that accomplishes your goal:

1. **Importing Required Libraries**: We begin by importing the necessary libraries to work with Pulumi and Kubernetes.

2. **Using `kubernetes.helm.v3.Chart`**: This resource represents a Helm chart in a Kubernetes cluster. The `chart` parameter is used to specify the name of the Helm chart, `values` to configure the chart, and `namespace` to specify the OpenShift namespace where the chart should be deployed.

3. **Configuring the Helm Chart**: Here, we will configure the Helm chart with the necessary values. We need to ensure the chart-specific values are set correctly, so it's important to check the chart's documentation or `values.yaml` for the right configuration options.

4. **Deployment to OpenShift**: Since OpenShift is a distribution of Kubernetes, we assume you have already set up Pulumi with the appropriate credentials to access your OpenShift cluster.

Here is the program that you can run using Pulumi:

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

// Step 1: Configure the Kubernetes provider to target your OpenShift cluster.
// For OpenShift, this would typically use the `kubernetes` provider which auto-configures based on kubeconfig settings.

// Step 2: Define a Helm Release using the `kubernetes.helm.v3.Chart` resource.
// Replace with the appropriate repository info and chart values.
const prometheusDnssecExporter = new k8s.helm.v3.Chart("prometheus-dnssec-exporter", {
    chart: "prometheus-dnssec-exporter",
    version: "YOUR_CHART_VERSION", // Specify the chart version. Replace with a proper chart version.
    fetchOpts: {
        repo: "https://REPO_URL_HERE", // Replace with the Helm repository URL that hosts the prometheus-dnssec-exporter chart
    },
    namespace: "YOUR_NAMESPACE", // Replace with your OpenShift project (namespace) where you want to deploy this chart.
    values: {
        // Add the necessary values to configure the chart.
        // This is highly dependent on what the chart exposes in its "values.yaml" file.
        // Refer to the chart's documentation for guidance on what values are available and their meaning.
    }
});

// Step 3: Export the resources URL so that you can access it easily after deployment.
// OpenShift, by default, creates a route for services that need to be exposed. You might want to create
// a Route resource explicitly if the Helm chart does not include it and the service needs to be exposed.

export const exporterUrl = prometheusDnssecExporter.getResourceProperty("v1/Service", "prometheus-dnssec-exporter-service", "status").apply(status => {
    // You may need to adjust this depending on the actual service name and properties when the chart is deployed.
    // This logic assumes the LoadBalancer service's endpoint is what you want to extract.
    return status.loadBalancer?.ingress[0]?.ip ?? "URL not available";
});
```

To run this Pulumi program:

1. Save the above code into a file named `index.ts`.
2. Ensure that you have Pulumi installed and configured for use with your OpenShift cluster.
3. Install the required dependencies by running `npm install @pulumi/pulumi @pulumi/kubernetes`.
4. Replace placeholders like `YOUR_CHART_VERSION`, `REPO_URL_HERE`, and `YOUR_NAMESPACE` with the actual values for your use case.
5. Use `pulumi up` command from the command line to create the resources on your OpenShift cluster.

This program will invoke Pulumi to provision your Helm chart onto your OpenShift cluster. After successfully running `pulumi up`, it will output the URL of the `prometheus-dnssec-exporter` service if available.

Make sure when deploying Helm charts that you verify all the values used in `values` to match your specific requirements, as well as considering any OpenShift-specific configurations you might need.