Deploy the keycloak-resources deployment for keycloak-operator helm chart on Google Kubernetes Engine (GKE)

Question

Pulumi · Accepted Answer

To deploy a Helm chart for the Keycloak Operator on Google Kubernetes Engine (GKE), you'll need to follow these steps:

1. Create a GKE cluster: This is the Kubernetes environment where your Keycloak Operator will run.
2. Install and Setup Helm: Helm is a package manager for Kubernetes that simplifies deployment of applications and services.
3. Add the Helm repo for Keycloak: This is the repository that contains the Keycloak Helm chart.
4. Install the Keycloak Operator chart: Deploy the Keycloak Operator using Helm, which will manage Keycloak instances.

I'll provide you with a Pulumi program in TypeScript that accomplishes these tasks. You'll see comments throughout the code which explain what each part is doing.

Below is a detailed Pulumi program for deploying the Keycloak Operator on GKE:

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

// Step 1: Create a GKE cluster
const cluster = new gcp.container.Cluster("gke-cluster", {
    initialNodeCount: 2,
    minMasterVersion: "latest",
    nodeVersion: "latest",
    nodeConfig: {
        // Define the properties of the machine type you want to use
        machineType: "n1-standard-1",
        oauthScopes: [
            "https://www.googleapis.com/auth/compute",
            "https://www.googleapis.com/auth/devstorage.read_only",
            "https://www.googleapis.com/auth/logging.write",
            "https://www.googleapis.com/auth/monitoring",
        ],
    },
});

// Step 2: Setup the Kubernetes provider
const k8sProvider = new k8s.Provider("gke-k8s", {
    kubeconfig: cluster.endpoint.apply(endpoint => {
        return cluster.name.apply(name => {
            return cluster.masterAuth.apply(masterAuth => {
                const context = `${gcp.config.project}_${gcp.config.zone}_${name}`;
                return `apiVersion: v1
clusters:
- cluster:
    certificate-authority-data: ${masterAuth.clusterCaCertificate}
    server: https://${endpoint}
  name: ${context}
contexts:
- context:
    cluster: ${context}
    user: ${context}
  name: ${context}
current-context: ${context}
kind: Config
preferences: {}
users:
- name: ${context}
  user:
    auth-provider:
      config:
        cmd-args: config config-helper --format=json
        cmd-path: gcloud
        expiry-key: '{.credential.token_expiry}'
        token-key: '{.credential.access_token}'
      name: gcp
`;
            });
        });
    }),
});

// Step 3: Add the Helm repo for Keycloak and define the Helm release
const keycloakOperatorChart = new k8s.helm.v3.Chart("keycloak-operator", {
    chart: "keycloak-operator",
    version: "0.1.0", // Replace with the desired chart version
    fetchOpts: {
        repo: "https://example.com/helm/repo", // Replace with the actual repo URL
    },
}, { provider: k8sProvider });

// Export the Kubeconfig to access the cluster with `kubectl` later if needed
export const kubeconfig = k8sProvider.kubeconfig;

// Export the cluster name
export const clusterName = cluster.name;
```

To use this program, replace the placeholder Helm repo URL (https://example.com/helm/repo) and version (`0.1.0`) with the actual values of the Keycloak Operator Helm chart.

After the program is written, you will run `pulumi up` to deploy these resources to GCP. pulumi will output the resulting `kubeconfig` which is used for interacting with your GKE cluster using `kubectl` and the cluster name.

The code is creating a new GKE cluster, setting up the Kubernetes provider pointing to the GKE cluster, then deploying the Keycloak Operator Helm chart into that cluster.

Understanding important parts of the program:

- **gcp.container.Cluster:** This is the GKE cluster where Keycloak will run. It is configured with a certain number of nodes and machine types. The oauthScopes are set to allow the nodes to interact with the necessary Google Cloud services.
- **k8s.Provider:** This configures Pulumi to work with the created GKE cluster. The kubeconfig is dynamically generated, allowing Pulumi to interact with your cluster.
- **k8s.helm.v3.Chart:** This Pulumi resource represents the Keycloak Operator Helm chart. You need to specify the chart and version you want to deploy, as well as the repo where the chart can be found.

Make sure to replace the placeholder values with actual values that correspond to the Keycloak Operator you want to deploy. You will need to have Helm repo URL and chart version where the Keycloak Operator Helm chart resides.

This program should be executed in a directory where you have Pulumi project set up. Pulumi will create and manage the cloud resources according to the specifications in this program. If you want to change any property (like the number of nodes or machine type), just change the values in the program and run `pulumi up` again. Pulumi will compute the minimal set of changes needed to update your cloud resources.