Deploy the selfsigned-cert-manager helm chart on Opensshift

Question

Pulumi · Accepted Answer

To deploy a self-signed cert-manager Helm chart on OpenShift using Pulumi, you'll need to use the `kubernetes.helm.v3.Chart` resource from the Pulumi Kubernetes provider. Helm charts allow you to define, install, and upgrade even the most complex Kubernetes applications. In this case, `cert-manager` is a tool for managing certificates within Kubernetes and can be installed via a Helm chart.

To proceed, we'll write a Pulumi program in TypeScript. This program will:

1. Set up a new Helm Chart resource pointing to the `cert-manager` Helm chart.
2. Specify that we want to install the self-signed certificate issuer by customizing the Helm chart's values.

First, ensure you have Pulumi installed and configured with access to your OpenShift cluster.

Now, let's walk through the Pulumi program. This program assumes you have already set up your OpenShift cluster and have the appropriate KUBECONFIG environment variable set so that Pulumi can communicate with your cluster.

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

// Create a new self-signed cert-manager Helm Chart.
const certManagerChart = new k8s.helm.v3.Chart("cert-manager", {
    // Normally the cert-manager chart is hosted in the Jetstack Helm repository,
    // so we need to set that repository here.
    repo: "jetstack",
    chart: "cert-manager",
    
    // Version of the cert-manager Helm chart.
    version: "1.6.1", // Use the correct chart version for cert-manager
    
    // Namespace where to install the cert-manager chart.
    namespace: "cert-manager",
    
    // Install CRDs are required by cert-manager.
    // The OpenShift cluster needs to be prepared with the necessary CustomResourceDefinitions.
    // The `installCRDs` option enables the Helm chart to install the required CRDs.
    values: {
        installCRDs: true, // Set to true to install cert-manager CRDs if they don't exist.
        
        // Add any additional Helm values that may need to be set to configure cert-manager
        // per your requirements. For example, you can enable a self-signed issuer by
        // defining it in the values below.
        
        // Here is an example of how to enable a self-signed issuer:
        extraArgs: [
            "--enable-certificate-owner-ref=true",
        ],
        
        // Specific settings can be set for the selfSigned issuer functionality of cert-manager.
        // Refer to the official cert-manager documentation for complete information on
        // configuration options: https://cert-manager.io/docs/configuration/selfsigned/
        // Below is an example that enables the self-signed issuer as the default for cert-manager.
        issuer: {
            selfSigned: {
                create: true,
            },
        },
    },
    
    // Explicitly opt into installing CRDs for Helm V3.
    // This is a Pulumi-specific option, not native to Helm.
    // By setting it to true, you're asking Pulumi to manage CRDs as regular resources.
    // Note: This only works for charts that provision CRDs via templates and not via hooks.
    skipAwait: false, // If true, pulumi would not wait for resources to be ready which is not recommended for CRDs.
    transformOpts: { skipAwait: false },
}, { provider: k8sProvider }); // Make sure to pass the OpenShift provider if not default.

// Export the resources name of the Chart
// This is useful if you need to reference the deployed Chart from other Pulumi programs,
// it's not required to achieve the deployment.
export const chartName = certManagerChart.name;
```

Before running this program, make sure you replace the `chart: "cert-manager"` with the chart name corresponding to the self-signed cert-manager if it's different from the standard cert-manager Helm chart. Also, adjust the `version` to match the version of the cert-manager you want to install.

To run this Pulumi program, follow these steps:
1. Save the TypeScript code to a file, for example `index.ts`.
2. Create a new Pulumi project in a directory containing this file with `pulumi new kubernetes-typescript`.
3. Replace the auto-generated `index.ts` in the new Pulumi project with your saved `index.ts`.
4. Run `pulumi up` to create the resources in your OpenShift cluster.

Please, make sure to review and customize the values specified under `values` block for your specific requirements. It's crucial to adjust these settings according to your environment and the official `cert-manager` chart documentation, especially the `extraArgs` and `issuer` sections, which I included as an example.