Deploy the hydra-maester helm chart on Azure Kubernetes Service (AKS)

Question

Pulumi · Accepted Answer

To deploy the "hydra-maester" Helm chart on an Azure Kubernetes Service (AKS) cluster using Pulumi, we will complete the following steps:

1. Set up an AKS cluster using the `azure-native` provider.
2. Deploy the "hydra-maester" Helm chart to the cluster.

We're going to use the `azure-native` provider because it is a more finely grained, resource-level access to Azure services, and `kubernetes` provider to deploy Helm chart to the AKS cluster.

Below is a Pulumi program written in TypeScript that accomplishes these steps.

### Detailed Explanation

Before we begin writing the code, make sure you have the Pulumi CLI installed and are logged in. You also need to be authenticated with Azure, which can typically be done via the Azure CLI with `az login`.

First, we will create an AKS cluster. To do so, we will define an AKS cluster resource using Pulumi's `azure-native.containerservice.ManagedCluster` class.

Once the AKS cluster is provisioned, we'll use Pulumi's `kubernetes` provider, particularly the `helm.v3.Chart` class, to deploy "hydra-maester" Helm chart. This class allows us to specify the chart name, default values for our configuration, and the chart repository where "hydra-maester" is located if it's not a part of the default Helm repository.

Note that I'm assuming "hydra-maester" is a Helm chart available in a public repository; replace the repository URL "repo_url_here" with the actual URL of the chart's repository. Additionally, set up the appropriate values for your Helm release under `values`. If "hydra-maester" requires specific configurations, you'll need to include them in the `values` object.

Here's how the complete program looks:

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

// Step 1: Create an AKS cluster
const resourceGroup = new azure.resources.ResourceGroup("myResourceGroup");

const cluster = new azure.containerservice.ManagedCluster("myAksCluster", {
    resourceGroupName: resourceGroup.name,
    identity: {
        type: "SystemAssigned",
    },
    agentPoolProfiles: [{
        count: 1,
        vmSize: "Standard_DS2_v2",
        name: "agentpool",
        mode: "System",
        osType: "Linux",
    }],
    dnsPrefix: "myakscluster",
});

const creds = pulumi.all([resourceGroup.name, cluster.name]).apply(([resourceGroupName, clusterName]) => {
    return azure.containerservice.listManagedClusterUserCredentials({
        resourceGroupName: resourceGroupName,
        resourceName: clusterName,
    });
});

const kubeconfig = creds.kubeconfigs[0].value.apply(c => Buffer.from(c, "base64").toString());

// Step 2: Deploy the "hydra-maester" Helm chart to the AKS cluster
const k8sProvider = new k8s.Provider("k8sProvider", {
    kubeconfig: kubeconfig,
});

const hydraMaesterChart = new k8s.helm.v3.Chart("hydraMaester", {
    chart: "hydra-maester",
    // Specify the repository URL if "hydra-maester" is not a part of the default helm repo
    fetchOpts: {
        repo: "repo_url_here",
    },
    // Set the appropriate values for your chart deployment here
    values: { /* ... */ },
}, { provider: k8sProvider });

// Outputs
export const aksClusterName = cluster.name;
export const kubeconfigOutput = pulumi.secret(kubeconfig);
```

### How to Run the Program

1. Save the above code in a file named `index.ts`.
2. Ensure you have the `@pulumi/azure-native` and `@pulumi/kubernetes` packages installed in your Node.js project:

```shell
npm install @pulumi/azure-native @pulumi/kubernetes
```

3. Run `pulumi up` to preview and deploy the changes. Pulumi will automatically run this TypeScript program to provision the resources specified.

Remember to replace placeholder strings like "repo_url_here" with actual values for your particular scenario. The helm chart values should also be specified based on the needs of "hydra-maester". If it requires sensitive information like passwords, consider using [Pulumi's secret](https://www.pulumi.com/docs/intro/concepts/secrets/) for storing such values.

After running the Pulumi program, the AKS cluster should be up and running, and the "hydra-maester" Helm chart will be deployed to it.