Deploy the umbrella helm chart on Opensshift

Question

Pulumi · Accepted Answer

Deploying a Helm chart on an OpenShift cluster involves a few steps: setting up the OpenShift cluster, configuring Pulumi to interact with it, and then deploying the Helm chart using Pulumi's Kubernetes provider. In this guide, I will walk you through the process using TypeScript.

First, you need to ensure you have an OpenShift cluster up and running. The setup of the OpenShift cluster itself is outside the scope of this Pulumi guide, but once you have it, you can get the Kubernetes configuration and point Pulumi to it.

Next, you'll need to install Pulumi and set up your OpenShift cluster credentials to work with Pulumi. If you have not done so, please follow the official Pulumi [Getting Started](https://www.pulumi.com/docs/get-started/kubernetes/) guide and the OpenShift documentation to configure access to your cluster from the command line.

Once you have Pulumi installed and your OpenShift cluster configured, you can create a Pulumi program to deploy your Helm chart. Assuming you have the Helm chart available and it's named "umbrella", the following Pulumi TypeScript program will deploy it to your OpenShift cluster.

Here is the Pulumi program to deploy an "umbrella" Helm chart:

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

const projectName = "umbrella-helm-chart";

// Initialize a Pulumi Kubernetes project.
const project = new k8s.Provider(projectName, {
    // Assuming you've already setup OpenShift CLI to point to your cluster
    // Pulumi will use the current context from your kubeconfig.
    // You can also specify the kubeconfig explicitly.
    kubeconfig: process.env.KUBECONFIG,
});

// Define the Helm chart, its version, and the values you want to override.
const chart = new k8s.helm.v3.Chart(projectName, {
    chart: "umbrella",
    // Replace with the URL of your chart repository or local path.
    fetchOpts: {
        repo: "http://your-chart-repository/",
    },
    // You can specify the namespace if your chart needs to be deployed in a specific one
    namespace: "your-namespace",
    // Define the values according to your chart's requirements.
    values: {
        service: {
            type: "ClusterIP",
        },
        // Add other values here based on the chart's `values.yaml`
    },
}, { provider: project });

// Export any important URLs or other information.
export const chartName = chart.metadata.name;
```

**Explanation:**

1. We first import the Kubernetes plugin from Pulumi.

2. We create a new Kubernetes provider by calling `new k8s.Provider()`, assigning it the project name and providing the `kubeconfig`. This configuration permits Pulumi to communicate with your OpenShift cluster. If you don't provide `kubeconfig`, Pulumi uses the default context from your Kubernetes configuration file.

3. Next, we deploy the "umbrella" Helm chart using `new k8s.helm.v3.Chart()`. This requires setting the chart name, fetch options (where your chart is located), any applicable namespaces, and any chart values you want to override.

4. At the end, you may export any outputs of your chart deployment that you may need for further operations or references, such as URLs or metadata.

5. Remember to replace placeholders like `http://your-chart-repository/` and `your-namespace` with actual values fitting your requirements.

Once this code is ready, you can deploy it using the following Pulumi CLI commands:

```bash
# Initialize a new Pulumi stack (if not done already)
pulumi stack init dev

# Install dependencies
npm install

# Preview deployment changes
pulumi up --yes
```

This will prompt Pulumi to perform the deployment, showing you a preview of what resources will be created or modified. After confirming, the deployment of your Helm chart will begin.

Remember that the actual parameters and configurations, such as the Helm chart values and repository, will depend on your specific Helm chart and OpenShift setup. Adjust the parameters in the code to match your requirements.