Deploy the keycloak-setup helm chart on Kubernetes

Question

Pulumi · Accepted Answer

To deploy a Helm chart for Keycloak on Kubernetes using Pulumi, you will need to use the `Chart` resource from the Pulumi Kubernetes provider. The `Chart` resource allows you to deploy a Helm chart from a repository, or from a local path if your chart is not available in a repository.

In the following program, we'll assume that the Keycloak Helm chart is available in a Helm repository and that your Kubernetes cluster is already configured and accessible via your `kubectl` configuration.

Here's how to write a Pulumi program in TypeScript that deploys the Keycloak Helm chart:

1. First, you'll import the necessary modules from Pulumi.
2. Next, you'll create a `Chart` resource, specifying the chart name, version, and any custom values you wish to apply.
3. Optionally, you can export any outputs from the chart that you might need, such as the service URL.

Below is a detailed explanation of each step along with the corresponding Pulumi code:

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

// Create a Kubernetes Helm Chart for Keycloak
// In this example, 'keycloak' is the name we're giving to the deployment.
// This name is used when generating resources like Pods within the Kubernetes cluster.
const keycloak = new k8s.helm.v3.Chart("keycloak", {
    // Specify the repository where the Keycloak Helm chart is located
    repo: "bitnami",
    // The name of the chart in the Helm repository
    chart: "keycloak",
    // Optionally, you can specify the version of the chart you want to deploy
    // If omitted, the latest version will be used
    version: "11.0.2",
    // Override default configuration values in the Keycloak Helm chart
    // You can customize any part of the Keycloak chart here
    values: {
        // For instance, you could set the number of Keycloak replicas
        // This is just a placeholder, replace the below with actual configuration values
        replicaCount: 1,
        // ... other custom configuration values
    },
    // The namespace where to deploy the chart
    // If not set, it defaults to the namespace set in the current context of your kubeconfig
    namespace: "keycloak-namespace"
});

// Outputs
// Here you can export the values that you want to make accessible outside of Pulumi.
// For example, you might want to export the public URL of the Keycloak service
export const keycloakURL = keycloak.getResourceProperty("v1/Service", "keycloak-http", "status").apply(status => {
    // You might need to adjust this to fit the actual service definition, for example if your service type is LoadBalancer.
    // This assumes the service is ClusterIP and doesn't do port-forwarding or external load balancing.
    return status.loadBalancer.ingress[0].hostname || status.loadBalancer.ingress[0].ip;
});
```

This code sets up a basic Helm chart deployment using Pulumi and provides an example of how you might override configuration values for the Keycloak chart.

**Important considerations**:
- Replace placeholders in the `values` object with the actual configuration options for Keycloak Helm chart.
- If you want to use a custom `values.yaml` file, you can replace the `values` object with the contents of that file.
- The `export const keycloakURL` line is only an example of how you might get the deployed service's URL. It needs to be adjusted according to your actual service configuration if your setup deviates from the defaults.

Remember, before you run a Pulumi program, make sure you have installed the Pulumi CLI and configured it correctly to access your Kubernetes cluster. You can find more information about getting started with Pulumi and Kubernetes [here](https://www.pulumi.com/docs/get-started/kubernetes/).