Deploy the query-exporter helm chart on Opensshift

Question

Pulumi · Accepted Answer

To deploy the `query-exporter` Helm chart on an OpenShift cluster using Pulumi, we will use the `kubernetes` package. This package allows us to deploy Helm charts among many other Kubernetes resources.

To deploy a Helm chart, we will utilize the `Chart` resource from Pulumi's Kubernetes provider. The `Chart` resource is a high-level interface that encapsulates the management of Helm chart releases.

Here's how you do it in TypeScript:

1. **Set up the Kubernetes provider**: Before deploying the Helm chart, you need to ensure that the program is configured to target your OpenShift Kubernetes cluster. Typically, this involves setting up the `kubeconfig` file that allows Pulumi to authenticate and communicate with the cluster.

2. **Define the Helm Chart**: You can define a Helm chart resource in Pulumi by specifying the chart's repository, name, and version, along with any configuration parameters required by the chart.

3. **Deploy the Chart**: Once you define the chart, you can perform `pulumi up` to deploy resources on your OpenShift cluster.

Here is a Pulumi program to deploy the `query-exporter` Helm chart on OpenShift:

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

// This will use the Kubernetes provider based on the kubeconfig from the current context,
// which should point to your OpenShift cluster. Make sure you have this configured correctly.

// Create a new instance of the `Chart` class to deploy the `query-exporter` Helm chart.
const queryExporterChart = new k8s.helm.v3.Chart('query-exporter', {
    // The `chart` parameter specifies the name of the chart from the repository.
    chart: "query-exporter",
    // The `version` parameter specifies the version of the chart to deploy.
    version: "0.1.0", // Replace with the actual version you wish to deploy.
    // The `fetchOpts` parameter is used to specify the Helm repo containing the chart if it's not in the default Helm repo.
    fetchOpts: {
        repo: "https://charts.example.com/", // Replace with the actual Helm chart repository URL.
    },
    // You can provide a `values` parameter to customize the chart's behavior.
    values: {
        // ... specify chart values here if needed
    },
    // Define the OpenShift namespace where the chart should be installed.
    namespace: "default" // Replace with the target namespace for your Openshift cluster if necessary.
});

// Export the base URL where the query-exporter is deployed to provide easy access after deployment.
export const queryExporterUrl = "http://query-exporter.example.com"; // Change this to match your OpenShift's ingress configuration.
```

Make sure to replace the `repo` and `version` placeholders with actual values that correspond to your `query-exporter` Helm chart information. Additionally, adjust the `namespace` and `queryExporterUrl` to align with your OpenShift environment.

Once your Pulumi program is ready, deploy the chart to your OpenShift cluster with these steps:

1. Open a terminal and navigate to the directory containing your Pulumi program.
2. Run `pulumi up` which will preview the deployment. Review the proposed changes carefully.
3. If you're satisfied with the preview, confirm the deployment by selecting `yes`.

The Pulumi CLI will communicate with your cluster and deploy the `query-exporter` Helm chart according to the configuration specified in the program. Once completed, you can use the exported URL to interact with the `query-exporter` service on your OpenShift cluster.