Deploy the shoot-rsyslog-relp helm chart on Azure Kubernetes Service (AKS)

Question

Pulumi · Accepted Answer

To deploy the `shoot-rsyslog-relp` Helm chart on Azure Kubernetes Service (AKS), you'll follow several steps to:

1. Create an AKS cluster using Pulumi.
2. Configure Kubernetes to connect to the created AKS cluster.
3. Deploy the Helm chart to the AKS cluster.

You'll need the `@pulumi/azure-native` package to create resources on Azure, the `@pulumi/kubernetes` package to interact with Kubernetes, and the Pulumi program using TypeScript. The AKS cluster will be created with default settings, but you can modify the configuration based on your requirements.

Here is a detailed Pulumi program that accomplishes these tasks:

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

// Create a new resource group to contain the AKS cluster and related resources.
const resourceGroup = new azure_native.resources.ResourceGroup("myResourceGroup");

// Create an AKS cluster.
const cluster = new azure_native.containerservice.ManagedCluster("myAKSCluster", {
    resourceGroupName: resourceGroup.name,
    dnsPrefix: pulumi.interpolate`${resourceGroup.name}-kube`,
    agentPoolProfiles: [{
        name: "agentpool",
        count: 1,
        vmSize: "Standard_DS2_v2",
    }],
    kubernetesVersion: "1.18.14",
});

// Export the kubeconfig for the cluster.
export const kubeconfig = pulumi.
    all([cluster.name, resourceGroup.name]).
    apply(([clusterName, rgName]) => {
        return azure_native.containerservice.listManagedClusterUserCredentials({
            resourceGroupName: rgName,
            resourceName: clusterName,
        });
    }).
    apply(creds => {
        const encoded = creds.kubeconfigs[0].value;
        return Buffer.from(encoded, 'base64').toString();
    });

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

// Deploy the shoot-rsyslog-relp Helm chart using the Kubernetes provider.
const rsyslogHelmChart = new k8s.helm.v3.Chart("shoot-rsyslog-relp-chart", {
    chart: "shoot-rsyslog-relp",
    // You should replace `CHART_REPO_URL` with the Helm chart repository URL where the chart is located.
    fetchOpts: { repo: "CHART_REPO_URL" },
}, { provider: k8sProvider });

// After running this program, Pulumi will ensure the `shoot-rsyslog-relp` Helm chart is deployed into your AKS cluster.
```

### Explanation:

1. **Resource Group**: We create a new Azure resource group to hold the AKS cluster and related resources. This allows for easy management and cleanup.

2. **AKS Cluster**: We instantiate an AKS cluster with basic configuration, such as the number of nodes and VM size.

3. **Kubeconfig Export**: A kubeconfig file is required to interact with the Kubernetes API server. We retrieve user credentials for the cluster which includes a kubeconfig file content. This is then converted from base64 to a string that the Kubernetes provider can accept.

4. **Kubernetes Provider**: We define a Pulumi Kubernetes provider that we’ll use to deploy Helm charts into our cluster. It is initialized with the kubeconfig generated from the AKS cluster, allowing it to interact with the cluster.

5. **Helm Chart Deployment**: We deploy the `shoot-rsyslog-relp` Helm chart into the AKS cluster using the Kubernetes provider. You will need to provide the actual Helm chart repo URL where `shoot-rsyslog-relp` is located, as the variable `CHART_REPO_URL`.

Remember to replace `CHART_REPO_URL` with the actual repository URL of the `shoot-rsyslog-relp` chart. You may also need to adjust some configurations such as the version of Kubernetes you want to use for the AKS cluster and specific settings for the Helm chart deployment.

To run the program, save it as `index.ts`, and then use `pulumi up` to create the resources. Pulumi will provide you with a preview of the changes and prompt you for confirmation before making any changes to your cloud resources. If you need to make any changes to the configuration, you can update your TypeScript file and run `pulumi up` again to apply those changes.