Deploy the tekton-pipelines helm chart on Opensshift

Question

Pulumi · Accepted Answer

To deploy the Tekton Pipelines Helm chart on OpenShift using Pulumi, you will primarily be using the `kubernetes.helm.v3.Chart` resource. This Pulumi resource allows you to deploy Helm charts on a Kubernetes cluster. Before you proceed with the deployment, you need to have the following prerequisites in place:

1. An OpenShift cluster where you have appropriate permissions to deploy applications.
2. The `kubectl` command-line tool configured to communicate with your OpenShift cluster.
3. The Pulumi CLI installed and set up to create and manage your infrastructure.
4. Helm must be installed if you wish to customize the chart before deploying it.

Here's a step-by-step guide along with the code in TypeScript to deploy the Tekton Pipelines Helm chart:

1. **Configure Pulumi to Use Your Kubernetes Cluster**: This typically involves setting the `kubeconfig` to point to your OpenShift cluster's configuration file.

2. **Define Your Helm Chart Deployment**: You'll declare a `Chart` resource, specifying the name of the Helm chart (`tekton-pipelines`) and optionally, any custom values you wish to override.

3. **Deploy Your Application**: Once you run the Pulumi program, it will reach out to the specified Helm repository, pull down the correct chart, and deploy it to your OpenShift cluster according to your specifications.

Below is the TypeScript program that accomplishes this:

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

// Assumes you have already configured kubectl to point to your OpenShift cluster.
// Pulumi uses the currently active context from your kubeconfig file.

// Create a Helm Chart resource using the Tekton Piples chart from the specified repository.
const tektonPipelines = new k8s.helm.v3.Chart("tekton-pipelines", {
    chart: "tekton-pipelines",
    version: "0.28.1", // specify the version you'd like to deploy
    fetchOpts: {
        repo: "https://charts.helm.sh/stable", // replace with the Tekton Pipelines Helm repository URL if it's different
    },
    // You can set custom values for the Helm chart here if necessary.
    // values: {
    //     someCustomValue: "override-value",
    // },
    namespace: "tekton-pipelines" // specify the namespace if you want the chart to be deployed in a specific namespace
});

// Export the Chart name
export const chartName = tektonPipelines.metadata.name;

// Once you have this code ready, you can run `pulumi up` to deploy the Tekton Pipelines to your OpenShift cluster.
```

This program starts by importing the Kubernetes package from Pulumi, which provides the ability to interact with Kubernetes resources, including deploying Helm charts. It then defines a new Helm chart resource representing the Tekton Pipelines helm chart.

You can customize the `values` object in the `Chart` resource to configure the Tekton Pipelines chart to your requirements. The `namespace` field is optional and specifies where to deploy the chart within your Kubernetes cluster. If you don't provide a namespace, it will default to the `default` namespace. Make sure the specified namespace already exists in your OpenShift cluster.

After defining the chart, the program exports the name of the deployed chart. You can use this name to reference the deployment within your Pulumi stack or configurations.

To apply the deployment, you run `pulumi up` in the directory containing this program. Pulumi will then perform the deployment for you, handling the details of communicating with the helm repositories and your Kubernetes cluster.