Deploy the systems-information helm chart on Opensshift

Question

Pulumi · Accepted Answer

To deploy the `systems-information` Helm chart on an OpenShift cluster using Pulumi, we could take advantage of Pulumi's Kubernetes provider. The `kubernetes.helm.v3.Chart` resource is used to deploy Helm charts on a Kubernetes cluster, such as OpenShift. OpenShift is essentially Kubernetes with additional features, so the Pulumi Kubernetes provider works for OpenShift as well.

Below is a detailed explanation followed by a Pulumi program written in TypeScript to deploy the specified Helm chart on OpenShift. The program assumes that you have already configured your Pulumi environment with the necessary OpenShift credentials and that the Helm chart `systems-information` is available in a Helm repository which is accessible from the cluster.

### Explanation

1. **Setup Pulumi Kubernetes Provider**: The Pulumi Kubernetes provider allows us to interact with our Kubernetes cluster, including OpenShift. It is assumed that your kubeconfig file is correctly set up to access the OpenShift cluster.

2. **Create a Helm Chart Resource**: The `kubernetes.helm.v3.Chart` resource will fetch the Helm chart from the specified repository and deploy it in the designated namespace on your OpenShift cluster.

3. **Resource Configuration**: You will set various configuration parameters for the Helm chart deployment, including chart name, repository, version, and any custom values required by the Helm chart.

Now let's look at a Pulumi TypeScript program that defines all these steps:

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

// Initialize a Kubernetes provider instance using the current context from your kubeconfig.
const k8sProvider = new kubernetes.Provider('openshiftK8s', {
    kubeconfig: pulumi.output({ isSecret: true }).apply(_ => process.env.KUBECONFIG),
});

// Define the Helm chart for the 'systems-information' application.
const systemsInfoChart = new kubernetes.helm.v3.Chart('systems-information', {
    repo: 'your_helm_chart_repo_name', // Replace with your Helm chart repository name.
    chart: 'systems-information', // The name of the chart in the repository.
    version: '1.0.0', // Replace with your desired chart version.
    namespace: 'default', // Specify the namespace where you want to deploy the chart. Change if needed.
    // If the Helm chart expects custom values, provide them here, like below:
    // values: { 
    //   someCustomValue: 'example',
    //   anotherValue: true,
    // },
}, { provider: k8sProvider });

// Export the base URL of the chart application. The exact way to get the URL may
// vary depending on your chart's resources and outputs.
export const chartBaseUrl = systemsInfoChart.getResource('v1/Service', 'systems-information')
    .status.loadBalancer.ingress[0].hostname.apply(hostname => `http://${hostname}`);
```

In this Pulumi program:

- We import the Pulumi packages.
- We create a Kubernetes provider to interact with OpenShift.
- We deploy the `systems-information` Helm chart with a set of configuration parameters.
- We export a base URL for the deployed application. The way to extract the URL depends on how your Helm chart is set up.

Please replace `'your_helm_chart_repo_name'` with the name of the repository where the `systems-information` Helm chart is located, and update any other configuration settings to match the requirements of your specific Helm chart and OpenShift environment.