Deploy the kommander-thanos helm chart on Azure Kubernetes Service (AKS)

Question

Pulumi · Accepted Answer

To deploy the Kommander-Thanos Helm chart on Azure Kubernetes Service (AKS), we'll follow these steps:

1. Create an AKS cluster using the `azure-native.hybridcontainerservice.ProvisionedCluster` resource.
2. Once the AKS cluster is up and running, we'll configure `kubectl` to communicate with the cluster.
3. Install the Helm chart for Kommander-Thanos on the AKS cluster using the `kubernetes.helm.sh/v3.Chart` resource.

Below is the Pulumi program in TypeScript that accomplishes these goals. The program is commented to help you understand each part of the process.

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

// Step 1: Create the AKS cluster.
// The resourceGroupName should be set to the name of an already existing Resource Group on Azure.
const resourceGroupName = "my-existing-resource-group";
// The clusterName should be a unique name that you want to give your AKS cluster.
const clusterName = "myKommanderThanosCluster";

// This will create a new AKS cluster with default settings.
// For a production environment, you should customize the cluster configuration.
const cluster = new azure.hybridcontainerservice.ProvisionedCluster(clusterName, {
    resourceGroupName: resourceGroupName,
    location: "West US", // The Azure region where you want to create the cluster.
    properties: {
        controlPlane: {
            vmSize: "Standard_DS2_v2", // The size of the VMs in the cluster.
            count: 1, // The number of VMs in the control plane.
        },
        linuxProfile: {
            ssh: {
                publicKeys: [{
                    keyData: "ssh-rsa AAAAB3N... your public SSH key ...", // Add your public SSH key.
                }],
                adminUsername: "azureuser", // Choose the admin username you want to use.
            },
        },
        kubernetesVersion: "1.20.9", // Set the version of Kubernetes you want to use.
        networkProfile: {
            networkPolicy: "calico", // Use Calico for network policy.
        },
    },
});

// Step 2: Configure kubectl to communicate with the new AKS cluster.
const kubeConfig = pulumi.
    all([cluster.name, resourceGroupName]).
    apply(([clusterName, resourceGroupName]) => {
        const creds = azure.containerservice.listManagedClusterUserCredentials({
            resourceGroupName: resourceGroupName,
            resourceName: clusterName,
        });
        return creds.kubeconfigs[0].value.apply(encoded => Buffer.from(encoded, 'base64').toString());
    });

const k8sProvider = new k8s.Provider("k8sProvider", {
    kubeconfig: kubeConfig,
});

// Step 3: Install the Kommander-Thanos Helm chart on the AKS cluster.
const kommanderThanosChart = new k8s.helm.sh.v3.Chart("kommander-thanos", {
    chart: "kommander-thanos", // The name of the Helm chart you want to deploy.
    version: "1.0.0", // Specify the chart version you want to deploy.
    fetchOpts: {
        repo: "https://kommander-thanos.github.io/helm-chart/", // The Helm chart repository where the chart is located.
    },
}, { provider: k8sProvider });

// Export the kubeconfig as a stack output so that we can easily access our cluster from the command line.
export const kubeConfigOut = kubeConfig;

```

This program first creates the AKS cluster using `azure-native.hybridcontainerservice.ProvisionedCluster`, configuring the necessary VM size, SSH key, Kubernetes version, and networking policy for Calico. If you don't have an SSH key, you can generate one using tools like `ssh-keygen` on Linux or macOS, or PuTTY on Windows.

Second, it sets up `kubectl` configuration using outputs from the AKS cluster provisioning, allowing subsequent Pulumi resources to deploy and manage applications within the cluster. We handle the necessary authentication details for communicating with the AKS cluster by getting the user credentials and converting the kubeconfig data to a string.

Lastly, it deploys the Kommander-Thanos Helm chart using `kubernetes.helm.sh/v3.Chart`. It fetches the Helm chart from the specified repository. Make sure to replace `"https://kommander-thanos.github.io/helm-chart/"` with the actual repository URL where the Kommander-Thanos Helm chart is hosted. If the version number is different, update that as well.

The kubeconfig is exported as a stack output to access the Kubernetes cluster from the command line.

To run this Pulumi program:

1. Save the code in a file with a `.ts` extension, e.g., `deployKommanderThanos.ts`.
2. Run `pulumi up` in the terminal within the directory where the file is saved. Make sure you have Pulumi CLI installed and logged in to your Pulumi account.
3. Follow the interactive prompts on the terminal to complete the deployment.

Keep in mind that adequate permissions on Azure are needed to create resources, and billing for the resources will apply as per your Azure subscription.