Deploy the keycloak-umbrella helm chart on Azure Kubernetes Service (AKS)

Question

Pulumi · Accepted Answer

To deploy the keycloak-umbrella Helm chart on Azure Kubernetes Service (AKS), you will need to perform the following high-level steps:

1. **Create an AKS Cluster**: Provision an AKS Cluster where your Keycloak service will run.
2. **Install Helm on your machine**: Helm is a package manager for Kubernetes that simplifies the deployment of applications.
3. **Add the Helm chart repository for Keycloak**: This allows you to fetch the Keycloak Helm chart.
4. **Deploy Keycloak using the Helm Chart**: With Helm, you can deploy the keycloak-umbrella chart with a single command.

Below is a Pulumi program written in TypeScript that will provision an AKS cluster and deploy the keycloak-umbrella Helm chart on it.

This Pulumi program uses two packages:
- `@pulumi/azure-native` to create an AKS cluster in Azure.
- `@pulumi/kubernetes` to deploy the Helm chart onto the AKS cluster.

Here's the Pulumi program:

```typescript
import * as pulumi from "@pulumi/pulumi";
import * as azure_native from "@pulumi/azure-native";
import * as k8s from "@pulumi/kubernetes";

// Create an Azure Resource Group
const resourceGroup = new azure_native.resources.ResourceGroup("myResourceGroup");

// Create an AKS cluster.
const cluster = new azure_native.containerservice.ManagedCluster("myAKSCluster", {
    resourceGroupName: resourceGroup.name,
    agentPoolProfiles: [{
        count: 1,
        vmSize: azure_native.containerservice.VmSizeTypes.Standard_DS2_v2,
        name: "agentpool",
        mode: azure_native.containerservice.AgentPoolMode.System,
    }],
    dnsPrefix: pulumi.interpolate`${resourceGroup.name}-kube`,
    enableRBAC: true,
    kubernetesVersion: "1.19.11",
});

// Export the kubeconfig for the cluster.
export const kubeconfig = cluster.kubeConfig;

// Create a Kubernetes provider instance that uses our kubeconfig.
const k8sProvider = new k8s.Provider("k8sProvider", {
    kubeconfig: cluster.kubeConfig.apply(JSON.stringify),
});

// Deploy the keycloak-umbrella Helm chart on AKS.
const keycloakRelease = new k8s.helm.v3.Release("keycloakRelease", {
    chart: "keycloak",
    repositoryOpts: {
        repo: "https://codecentric.github.io/helm-charts",
    },
    version: "9.8.1", // Specify the chart version you wish to deploy
    namespace: "default",  // Kubernetes namespace where you want to deploy Keycloak
}, { provider: k8sProvider });

// Export the public URL for Keycloak.
export const keycloakUrl = pulumi.interpolate`http://${kubeconfig.apply(cfg => JSON.parse(cfg).clusters[0].cluster.server)}`;

// When running `pulumi up`, this program will:
// 1. Create a Resource Group.
// 2. Deploy an AKS cluster into the resource group.
// 3. Configure a K8s provider to point to the AKS cluster.
// 4. Deploy Keycloak to AKS using the specified Helm chart.
```

In this program:

- You define an Azure resource group that acts as a logical container for the AKS cluster.
- You create the AKS cluster with a single agent pool.
- You export the kubeconfig, which is necessary to communicate with your cluster. It contains credentials and the endpoint information required by `kubectl` and the Kubernetes client library.
- You create a Kubernetes provider using Pulumi with the exported kubeconfig from the AKS cluster deployment to interact with your cluster.
- You deploy the Keycloak Helm chart to your AKS cluster under the default namespace.

If you want to customize the deployment, such as configuring Keycloak specific settings, persistent volume claims, or ingress controllers, you can add appropriate configurations to the `values` parameter inside the `k8s.helm.v3.Release` class instance.

The `keycloakUrl` is a computed value that gives you the endpoint to access your Keycloak instance once it's deployed. Depending on your actual setup, you may need to setup additional resources like an Ingress controller, or modify security groups to access Keycloak from the public internet.

Before running `pulumi up` to deploy this stack, ensure you have the Azure command-line interface configured with credentials. Additionally, install the Pulumi CLI and log in to the Pulumi service (or use the local or a self-hosted backend as per your requirements).

After the deployment, you will get the kubeconfig and Keycloak URL as stack outputs which you can use to configure and access your Keycloak instance on AKS.