Deploy the freeipa helm chart on Azure Kubernetes Service (AKS)

Question

Pulumi · Accepted Answer

Deploying the FreeIPA Helm chart on an Azure Kubernetes Service (AKS) cluster involves several steps. We'll create an AKS cluster, install the Helm CLI tool, and then use it to deploy the FreeIPA chart to our cluster.

Below is a Pulumi program in TypeScript that sets up an AKS cluster and prepares it for the deployment of the Helm chart. This program uses the `azure-native` provider, which is a Pulumi resource provider for managing Azure resources natively.

### Explanation

1. **Create an AKS Cluster**: We first define an AKS cluster by specifying its required properties, such as `dnsPrefix`, `kubernetesVersion`, and node pool (agent pool) configurations.

2. **Install the Helm Chart**: After the cluster is provisioned, we will install the Helm chart for FreeIPA. Pulumi has a native Helm Chart resource that can be used to deploy a chart on a Kubernetes cluster.

### Prerequisites

- Pulumi CLI installed and configured for Azure
- Azure CLI installed and logged in
- Helm CLI installed locally (used for fetching Helm charts, only if necessary)

### Pulumi Program

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

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

// Create an AKS cluster
const cluster = new azure.containerservice.ManagedCluster("myCluster", {
    resourceGroupName: resourceGroup.name,
    agentPoolProfiles: [{
        count: 2,
        maxPods: 110,
        mode: "System",
        name: "agentpool",
        osDiskSizeGB: 30,
        osType: "Linux",
        vmSize: "Standard_DS2_v2",
    }],
    dnsPrefix: "myk8scluster",
    enableRBAC: true,
    kubernetesVersion: "1.19.11",
    linuxProfile: {
        adminUsername: "testuser",
        ssh: {
            publicKeys: [{
                keyData: "ssh-rsa AAAAB3NzaC1yc2E...",
            }],
        },
    },
    nodeResourceGroup: `MC_azurepulumi_${resourceGroup.name}`,
    servicePrincipalProfile: {
        clientId: "myServicePrincipalClientId",
        secret: "myServicePrincipalClientSecret",
    },
});

// Expose a K8s provider instance from the cluster
const k8sProvider = new k8s.Provider("k8sProvider", {
    kubeconfig: cluster.kubeConfigRaw,
});

// Deploy the FreeIPA Helm chart on the AKS cluster
const freeipaChart = new k8s.helm.v3.Chart("freeipa", {
    chart: "freeipa",
    version: "x.y.z", // specify the version of the chart to deploy
    fetchOpts:{
        repo: "https://helm.example.com/", // specify the Helm chart repository
    },
}, { provider: k8sProvider });

// Export the KubeConfig and Cluster name
export const kubeConfig = cluster.kubeConfigRaw;
export const aksClusterName = cluster.name;
```

In the above program:
- Ensure to replace `"myServicePrincipalClientId"` and `"myServicePrincipalClientSecret"` with your actual Azure service principal credentials.
- Replace `"ssh-rsa AAAAB3NzaC1yc2E..."` with your actual SSH public key for secure access to your AKS nodes.
- Specify the correct FreeIPA Helm chart version in place of `"x.y.z"`.
- Mention the correct Helm chart repository URL at `"https://helm.example.com/"`.

After running this program using the Pulumi CLI, you will have an AKS cluster up and running and ready for FreeIPA Helm chart deployment.

### Next Steps
To deploy the FreeIPA chart:
1. Run `pulumi up` to provision the AKS cluster and the other infrastructure.
2. Once the cluster is provisioned, the Helm chart will also be deployed as part of the Pulumi update.

This will set up FreeIPA on the AKS cluster provided that the Helm chart you are referring to is compatible and adequately configured. If there are extra configurations or values you need to set for the FreeIPA Helm chart, add them in the `values` property in `freeipaChart`.

### Running the Program

To run this program with Pulumi:
- Save the code to a file with a `.ts` extension, for example, `deploy-freeipa.ts`.
- Run `pulumi up` to execute it.
- After successful execution, Pulumi will report on the status of the resources and export any specified output, such as the cluster's kubeconfig.