Deploy the wildcard-tls helm chart on Kubernetes

Question

Pulumi · Accepted Answer

To deploy a Helm chart on Kubernetes using Pulumi, you'll need to use the `helm.sh/v3.Chart` class from the Pulumi Kubernetes provider. This class makes it easy to specify Helm charts directly in your infrastructure as code.

Here's how a Pulumi program in TypeScript might look like to deploy a wildcard TLS chart:

1. First, you'll need to set up the necessary prerequisites, which are the Pulumi CLI and Kubernetes cluster where the Helm chart will be deployed.

2. Next, use Pulumi to create a new chart resource by defining a `helm.sh/v3.Chart` object. You will specify the chart name as 'wildcard-tls' (assuming there is a helm chart by this name available in a chart repository), and provide configuration details.

3. Specify the values in the `values` field which are required by the Helm chart to customize its deployment. If your chart requires specific TLS certificates, you might need to generate them or use existing secrets in Kubernetes.

4. Finally, run `pulumi up` to preview and deploy your changes.

Here's the TypeScript code that achieves the above steps:

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

// Create a wildcard-tls Helm chart instance using the 'wildcard-tls' chart from a repository.
const wildcardTlsChart = new k8s.helm.v3.Chart("wildcard-tls", {
    // Replace `REPO_URL` with the URL of the Helm repository
    // which contains the 'wildcard-tls' chart.
    repo: "REPO_URL",
    chart: "wildcard-tls",
    values: {
        // Provide any required values to configure the chart.
        // This typically includes setting the domain name for which the wildcard certificate should be valid,
        // as well as any other necessary configuration for the chart.
        // For example, if the chart requires setting the domain:
        domain: "*.example.com",
        // You might also need to specify where your Kubernetes cluster should look for TLS certificates:
        // tlsSecretName: "wildcard-tls-secret",
        // ...any other required values.
    },
    // Specify the namespace where you want to deploy the chart, if different from default.
    namespace: "default",
});

// Export the base domain for which the wildcard certificate is valid.
export const baseDomain = wildcardTlsChart.getResourceProperty("v1/Service", "wildcard-tls", "status")
    .apply(status => status.loadBalancer.ingress[0].hostname);
```

Make sure you replace `"REPO_URL"` with the URL of the Helm repository containing the 'wildcard-tls' chart and fill out the `values` section according to the chart’s requirements. Also, specify the namespace where you want the chart to be deployed if you don't want to use the default namespace.

In the final line, we're exporting a property of `baseDomain`. It attempts to export the ingress hostname, where the wildcard TLS will be available. Note that the actual properties you'll want to export will depend on the specifics of the Helm chart you’re using and the exact output you need.

Please adjust this code to match the exact details of your Helm chart regarding how it handles TLS and what domain and other configurations are needed. If the chart does not exist in a public repository, you will need to adjust the `repo` and `chart` parameters accordingly, and potentially provide authentication details for a private repository.