Deploy the helm-mongodb-operator helm chart on Azure Kubernetes Service (AKS)

Question

Pulumi · Accepted Answer

To deploy the `helm-mongodb-operator` helm chart on Azure Kubernetes Service (AKS), you'll need to go through a few steps:

1. **Set up an AKS Cluster**: Before you can deploy any applications to Kubernetes, you need a running cluster. AKS is a managed Kubernetes service that simplifies cluster deployment and management.

2. **Install the Pulumi Kubernetes Provider**: This provider allows Pulumi to interact with Kubernetes, including AKS.

3. **Deploy the Helm Chart**: Helm is a package manager for Kubernetes that enables you to package, configure, and deploy applications and services onto Kubernetes clusters.

Here is a Pulumi program written in TypeScript that accomplishes the following:

- Creates an AKS cluster.
- Deploys the `helm-mongodb-operator` helm chart to the AKS cluster.

Before you run this program, ensure you have the following prerequisites met:

- A Pulumi account setup with the correct Azure credentials configured.
- Node.js and npm installed on your machine.
- Pulumi CLI installed.

Now, let's explain the parts of the code:

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

// Create a new AKS cluster.
const cluster = new azure_native.containerservice.ManagedCluster("myCluster", {
    // Define your resource group, location and other cluster settings here.
    resourceGroupName: "myResourceGroup",
    location: "East US",
});

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

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

// Deploy the helm-mongodb-operator helm chart.
const chart = new k8s.helm.v3.Chart("mongodb-operator", {
    chart: "helm-mongodb-operator",
    // Specify your Helm chart repository here if it's from a custom repo.
    // repo: "myRepo",
    // Specify the version of the Chart if necessary.
    // version: "1.0.0",
    // Values can be provided to the Chart for customization if needed.
    // values: {...},
}, { provider });

// Export the Chart status, this exports the details of the deployed chart.
export const helmChart = chart.status;
```

Let's break down the important sections of the code:

- We start by importing the required libraries for Pulumi, the Azure native provider, and the Kubernetes provider.
- An AKS cluster `myCluster` is created with configurations you need to specify as per your requirements, like the `resourceGroupName` and `location`.
- The `kubeconfig` of the cluster is exported so that it can be used to access the cluster with `kubectl` or other tools.
- A new `k8s.Provider` is instantiated with the `kubeconfig`, allowing Pulumi to communicate with your AKS cluster.
- We then define a `Chart` resource which represents the `helm-mongodb-operator` chart. You'll need to specify the correct chart name and repository if it's not a standard Helm repository.
- Finally, the status of the deployed helm chart is exported. This will give you insights into the deployed resources by the Helm chart, including any services, deployments, and pods.

After you have the code ready, you can run the program as follows:

1. Save the code into a file named `index.ts`.
2. Run `pulumi up` to preview and deploy the changes.

Remember that deploying an AKS cluster and Helm chart may incur costs in your Azure account. Make sure to review Azure's pricing page for AKS and any associated services you might use.

Once the `pulumi up` command is executed, Pulumi will show you a preview of the resources that will be created. You can proceed with the deployment by confirming the prompt. After the deployment is complete, you can use the exported `kubeconfig` to manage your AKS cluster using `kubectl` or other Kubernetes management tools.

Please replace the placeholders like `myResourceGroup`, `East US` with the actual values you would like to use for your resource group and location respectively. If you're using a custom Helm chart repository, you'll need to specify the `repo` URL and ensure that the `chart` name matches the one in your repository.