Deploy the vtn-service helm chart on Opensshift

Question

Pulumi · Accepted Answer

To deploy a Helm chart on an OpenShift cluster with Pulumi, you'll be using the `kubernetes.helm.v3.Chart` resource from Pulumi's Kubernetes provider. This resource represents a Helm chart in a Kubernetes cluster and allows you to deploy and manage applications on the cluster through Helm charts (which are package formats used to deploy applications on Kubernetes).

To begin deploying the `vtn-service` Helm chart, you will need to set up a Pulumi project, configure access to your OpenShift cluster, and write a Pulumi program in TypeScript. Assume that you have already created or had access to an OpenShift cluster, and you have configured your `kubectl` to interact with it.

Here is a detailed breakdown of the steps the following program accomplishes:

1. It imports the necessary Pulumi and Kubernetes libraries.
2. It uses the `kubernetes.helm.v3.Chart` resource to define the deployment of the `vtn-service` Helm chart. You need to provide it with the necessary information such as the chart name, any values you want to override in the Helm chart's `values.yaml` file, and the namespace where you want the chart to be deployed.

Remember to replace the placeholder values such as `CHART_VERSION`, `REPO_URL`, and `YOUR_NAMESPACE` with the actual values relevant to your deployment scenario.

Here's a Pulumi program that demonstrates how to accomplish this:

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

// Provide the name, version, and repository of your Helm chart.
const chartName = 'vtn-service';
const chartVersion = 'CHART_VERSION'; // Specify the version of the chart you want to deploy.
const chartRepoUrl = 'REPO_URL'; // Specify the URL of the Helm repository that contains the chart.

// Optionally, specify any custom values you need for your Helm chart.
const customValues = {
  // Replace these with actual values specific to `vtn-service` chart.
  key: "value",
  // ...other custom values...
};

// Deploy the `vtn-service` Helm chart to your OpenShift cluster.
const vtnServiceChart = new k8s.helm.v3.Chart(chartName, {
  chart: chartName,
  version: chartVersion,
  fetchOpts: {
    repo: chartRepoUrl,
  },
  values: customValues,
  namespace: 'YOUR_NAMESPACE', // Replace with the namespace for deployment, create one if necessary.
}, { provider: k8sProvider }); // Ensure you configure the k8s provider with your OpenShift cluster credentials.

// Export any details required to access the application.
export const appName = vtnServiceChart.getResourceProperty('v1/Service', 'vtn-service', 'metadata.name');
export const appUrl = pulumi.interpolate`http://${appName}.YOUR_OPENSHIFT_CLUSTER_DOMAIN`; // Replace with your actual domain.

```

In this program, we create a new Helm chart resource defining our `vtn-service` application. We specify the exact version and repository for the Helm chart, along with optional custom values that can be used to customize the Helm chart deployment.

The `fetchOpts` field inside the Helm chart initialization provides a way to specify the repository URL and other fetching options. The `values` field allows you to pass in your custom values to tailor the Helm chart to your needs.

The last part of the program can export certain properties of the deployed resources. For example, it might export the internal service name or a constructed URL you might use to access the application, given the domain name on which your OpenShift is hosted.

**Note**: To actually deploy this to your OpenShift cluster, you'll need to have the Pulumi CLI installed, be logged into your Pulumi account, and have access to your OpenShift cluster from your local machine. Then you can simply run `pulumi up` in your terminal in the directory where this code resides, and Pulumi will perform the deployment. This setup is specific to your environment and what access permissions you have set up.