Deploy the scheduler-plugins helm chart on Azure Kubernetes Service (AKS)

Question

Pulumi · Accepted Answer

To deploy the scheduler-plugins Helm chart on an Azure Kubernetes Service (AKS) cluster using Pulumi, you'll need to follow these general steps:

1. **Set up an AKS cluster**: This will serve as the environment where your Helm chart will be deployed. You'll specify configurations like the node size, the number of nodes, and the Kubernetes version.

2. **Deploy the Helm chart**: With your AKS cluster running, you can deploy the scheduler-plugins Helm chart using the `Chart` resource provided by the Pulumi Kubernetes provider.

Below you'll find a complete Pulumi program that sets up a basic AKS cluster and deploys the scheduler-plugins Helm chart using TypeScript. Please make sure to replace the placeholder values in the `chart` resource with the correct values for the Helm chart you want to deploy.

### Detailed Pulumi Program:

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

// Create an Azure Resource Group
const resourceGroup = new azure.core.ResourceGroup("my-resource-group", {
    location: "East US",
});

// Create an AKS cluster
const cluster = new azure.containerservice.KubernetesCluster("my-aks-cluster", {
    resourceGroupName: resourceGroup.name,
    defaultNodePool: {
        name: "default",
        nodeCount: 2,
        vmSize: "Standard_DS2_v2",
    },
    dnsPrefix: "myakscluster",
    servicePrincipal: {
        clientId: "your-service-principal-client-id",
        clientSecret: "your-service-principal-client-secret",
    },
    // Replace with a valid Kubernetes version for AKS
    kubernetesVersion: "1.19.11",
});

// Export the Kubeconfig
export const kubeconfig = cluster.kubeConfigRaw;

// Create a Kubernetes provider instance using the generated kubeconfig
const k8sProvider = new k8s.Provider("k8s-provider", {
    kubeconfig: cluster.kubeConfigRaw,
});

// Deploy the scheduler-plugins Helm chart into the AKS cluster
const schedulerPluginsChart = new k8s.helm.v3.Chart("scheduler-plugins", {
    chart: "scheduler-plugins",
    version: "version-number", // specify the version number of the scheduler-plugins chart
    fetchOpts: {
        repo: "https://helm-repository-url", // specify the Helm repository URL hosting the scheduler-plugins chart
    },
}, { provider: k8sProvider });

// Export the AKS cluster name and Kubernetes config
export const aksClusterName = cluster.name;
```

### Explanation:

1. The `azure.core.ResourceGroup` resource creates a new Resource Group in Azure. This is a logical container into which Azure resources like AKS clusters will be deployed.

2. The `azure.containerservice.KubernetesCluster` resource defines and creates an AKS cluster. We specify the node size, the number of nodes, the Kubernetes version, and credentials which are required to create the cluster.

3. We export the `kubeconfig` of the cluster using `export const kubeconfig`. This `kubeconfig` will be used to interact with your Kubernetes cluster.

4. A Pulumi Kubernetes provider is then instantiated with `new k8s.Provider`, which uses the `kubeconfig` from the AKS cluster. This provider helps to ensure that the Helm chart will be deployed to the correct cluster.

5. The `k8s.helm.v3.Chart` resource represents the Helm chart we want to deploy. Here, we specify the Helm chart's name, the chart's version, and the Helm repository's URL.

6. Finally, we export the AKS cluster name for easy reference.

Remember that you'll need to have Pulumi installed and configured with Azure credentials on your system to apply this configuration. The code will create real resources in your Azure account, which might result in charges.

Please note that secrets like service principal client id and secret should not be hardcoded as shown in this example. They should be managed securely (e.g., using Pulumi Config secrets or using Azure Key Vault).

You can run this Pulumi program by executing `pulumi up`, which will provision the resources defined in the code. Upon successful execution, the AKS cluster will be ready, and the Helm chart will be deployed.