Deploy the ocspd helm chart on Azure Kubernetes Service (AKS)

Question

Pulumi · Accepted Answer

To deploy the `ocspd` Helm chart on Azure Kubernetes Service (AKS), you'll want to start by setting up an AKS cluster. You will then deploy the Helm chart to this cluster. Below, I'll guide you through the steps to achieve this using Pulumi with Azure and Kubernetes providers. We will use the `azure-native` provider to create the AKS cluster and the `kubernetes` provider to deploy the Helm chart.

### Step 1: Import Necessary Packages

First, we will import the necessary Pulumi packages in our TypeScript program to facilitate the creation and management of resources in Azure and Kubernetes.

### Step 2: Create an AKS Cluster

We will construct an AKS cluster using the `azure-native.containerservice.ManagedCluster` class. It is important to provision an adequate size for your nodes specified in `defaultNodePool` and a valid Azure region.

### Step 3: Deploy the Helm Chart

Once the AKS cluster is ready, we'll configure the `kubernetes` provider to use the kubeconfig of the AKS cluster. Then, we'll deploy the `ocspd` Helm chart using the `helm.sh/v3.Chart` class, specifying the chart name, repository, and any necessary values.

### Step 4: Export the Cluster Properties

Finally, we'll export the cluster's name and kubeconfig to connect and interact with the cluster after the deployment is complete.

Below is the Pulumi TypeScript 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";

// Step 1: Creating the AKS Cluster
const resourceGroupName = new azure_native.resources.ResourceGroup("myResourceGroup", {
    location: "EastUS", // You can choose a different region.
});

const aksCluster = new azure_native.containerservice.ManagedCluster("myAKSCluster", {
    resourceGroupName: resourceGroupName.name,
    location: resourceGroupName.location,
    identity: {
        type: "SystemAssigned", // This provides an identity for the cluster to interact with other Azure services.
    },
    agentPoolProfiles: [{
        count: 1, // Adjust the node count based on your requirements.
        maxPods: 110, // You can adjust the maximum number of pods per node.
        mode: "System",
        name: "agentpool", // You can choose a different name for the node pool.
        osType: "Linux", // The osType for node pool VMs. Can be "Linux" or "Windows".
        vmSize: "Standard_DS2_v2", // This determines the size of the VMs in the node pool.
    }],
    dnsPrefix: "myakscluster", // Replace with a unique DNS prefix.
    // Note: Additional required configurations for the Kubernetes cluster go here.
});

const kubeconfig = pulumi.all([resourceGroupName.name, aksCluster.name]).apply(([rgName, clusterName]) =>
    azure_native.containerservice.listManagedClusterUserCredentials({
    resourceGroupName: rgName,
    resourceName: clusterName,
})).apply(res => Buffer.from(res.kubeconfigs[0].value, "base64").toString());

// Step 2: Deploying the ocspd Helm Chart to AKS Cluster
const k8sProvider = new k8s.Provider("k8sProvider", {
    kubeconfig: kubeconfig,
});

const ocspdChart = new k8s.helm.v3.Chart("ocspd", {
    chart: "ocspd",
    version: "1.0.0", // Specify the chart version you wish to deploy.
    fetchOpts: {
        repo: "http://helm-repository-url.com/", // Replace with the actual Helm repository URL.
    },
}, { provider: k8sProvider });

// Step 3: Export the Cluster Name and Kubeconfig
export const clusterName = aksCluster.name;
export const clusterKubeconfig = kubeconfig;
```

### Explanation

- The `azure_native.resources.ResourceGroup` represents the new resource group where our AKS will be deployed.
- The `azure_native.containerservice.ManagedCluster` defines the AKS cluster resource.
- We retrieve the kubeconfig with `azure_native.containerservice.listManagedClusterUserCredentials`, enabling you to interact with your AKS cluster using kubectl or Pulumi's Kubernetes provider.
- The `k8s.Provider` is then instantiated using this kubeconfig, allowing us to define resources within the AKS cluster.
- The `ocspd` Helm chart is deployed using the `k8s.helm.v3.Chart` class, which takes the chart name, version, and repository URL as inputs.
- We export the cluster details for you to use later, like connecting to the cluster using kubectl.

### Next Steps

After writing and saving this program to a `index.ts` file:

1. Install Pulumi CLI and set up Azure credentials.
2. Run `npm install` to install the dependencies from `package.json`.
3. Use `pulumi up` to preview and deploy the changes.
4. After deployment, use `pulumi stack output clusterKubeconfig` to get the kubeconfig for the AKS cluster.

Reminder: Make sure you replace placeholder values with actual values specific to your needs, such as chart version, Helm repository URL, and DNS prefix.