Deploy the k8s-spot-rescheduler helm chart on Opensshift

Question

Pulumi · Accepted Answer

To deploy the `k8s-spot-rescheduler` Helm chart on an OpenShift cluster with Pulumi, you can use the `kubernetes.helm.v3.Chart` resource from the Pulumi Kubernetes provider. The `Chart` resource allows you to deploy Helm charts in a Kubernetes cluster. OpenShift is a Kubernetes distribution, so you can interact with it using the standard Kubernetes resources and tools.

Below is a basic Pulumi program written in TypeScript that demonstrates how to deploy a Helm chart to an OpenShift cluster. This program assumes you have already configured Pulumi to use your Kubernetes context for OpenShift, and that Helm chart for `k8s-spot-rescheduler` exists in a chart repository.

Before executing this program, ensure you have access to your OpenShift cluster and have the appropriate permissions to deploy resources into the namespace you are targeting.

Here’s the Pulumi program that deploys the `k8s-spot-rescheduler` Helm chart:

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

// Replace with the namespace where you want to deploy the spot-rescheduler.
const namespace = 'default';

// Helm chart release name
const releaseName = 'k8s-spot-rescheduler';

// Helm chart settings
const chartName = 'k8s-spot-rescheduler';
const chartVersion = '1.0.0'; // Specify the chart version you want to deploy
const helmRepo = 'https://example.com/helm-charts'; // Replace with the actual Helm chart repo URL

// Create a Helm Chart resource that installs the k8s-spot-rescheduler
const reschedulerChart = new k8s.helm.v3.Chart(releaseName, {
    // Chart can be configured to fetch from a URL or a repository
    // repository is used when it is set, otherwise fetch from chart URL
    // Make sure you have added the repo using `helm repo add` if using the 'repo' option
    chart: chartName,
    version: chartVersion,
    fetchOpts: {
        repo: helmRepo,
    },
    namespace,
    // Optionally customize the Helm chart values here if needed
    values: {
        // ...Set your values for the helm chart if necessary
    }
}, { providers: { kubernetes: k8sProvider } }); // Assuming k8sProvider is your OpenShift cluster provider

export const chartStatus = reschedulerChart.status;
```

Explanation:

1. Import the Pulumi Kubernetes library.
2. Define the namespace where the Helm chart will be deployed. Replace `'default'` with the name of your target namespace.
3. Set the release name for the Helm chart deployment.
4. Specify the chart name and version. These should match the Helm chart details you want to deploy.
5. Provide the URL of the Helm chart repository where your chart is located.
6. Instantiate a new Helm chart resource that Pulumi will manage. This includes the chart details, namespace to deploy into, and optional values to customize the chart behavior.
7. An export is included to show the deployment status, which will output the Helm release status once the deployment is complete.

To run this Pulumi program, you will need to run `pulumi up` from the command line where the above code is saved (typically in a file named `index.ts` within your Pulumi project).

As this is a learning example, please ensure the Helm repository URL and chart version match the actual details of the `k8s-spot-rescheduler` Helm chart that you intend to deploy.

Remember to adjust the fetch options and values as needed for your specific configuration and according to the chart's documentation.