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

Question

Pulumi · Accepted Answer

To deploy the axonops Helm chart on Azure Kubernetes Service (AKS) using Pulumi, you will go through the following steps:

1. **Set up an AKS Cluster**: Provision an AKS cluster where your application will run.
2. **Install Helm and Configure it for the AKS Cluster**: This will allow you to deploy Helm charts, which is a collection of pre-configured Kubernetes resources.
3. **Deploy the Helm Chart**: You will then use Pulumi's `Chart` resource from the Kubernetes provider to deploy the axonops Helm chart to your AKS cluster.

For this process, we'll be using two main Pulumi resources:
- `azure-native:containerservice:KubernetesCluster`: Represents an AKS cluster.
- `kubernetes.helm.v3.Chart`: Represents a Helm chart deployment.

Here is the Pulumi program that performs these steps:

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

const config = new pulumi.Config();

// Step 1: Create an AKS cluster
const resourceGroup = new azure_native.resources.ResourceGroup("myResourceGroup");

const aksCluster = new azure_native.containerservice.ManagedCluster("myAksCluster", {
    resourceGroupName: resourceGroup.name,
    agentPoolProfiles: [{
        count: 1,
        maxPods: 110,
        mode: "System",
        name: "agentpool",
        osDiskSizeGB: 30,
        osType: "Linux",
        vmSize: "Standard_DS2_v2",
    }],
    dnsPrefix: "myk8scluster",
    enableRBAC: true,
    kubernetesVersion: "1.20.9",
    linuxProfile: {
        adminUsername: "aksuser",
        ssh: {
            publicKeys: [{
                keyData: "ssh-rsa YOUR_SSH_PUBLIC_KEY_HERE aksuser@my-aks-cluster",
            }],
        },
    },
    nodeResourceGroup: "my-aks-node-group",
});

// Step 2: Configure kubectl to connect to the new AKS cluster
const creds = pulumi.all([resourceGroup.name, aksCluster.name]).apply(([rgName, clusterName]) => 
  azure_native.containerservice.listManagedClusterUserCredentials({
    resourceGroupName: rgName,
    resourceName: clusterName,
  })
);

const kubeconfig = creds.apply(creds => Buffer.from(creds.kubeconfigs[0].value, 'base64').toString());

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

// Step 3: Deploy the axonops Helm chart to the AKS cluster
const axonopsChart = new k8s.helm.v3.Chart("axonopsChart", {
    // Replace with the correct repository and chart details for axonops
    repo: "helm_repo_where_axonops_is_hosted",
    chart: "axonops",
    version: "chart_version", // specify the version of the chart to use
}, { provider: k8sProvider });

// Export the kubeconfig and cluster name
export const kubeConfig = kubeconfig;
export const clusterName = aksCluster.name;
```

In the code above:
- Replace `YOUR_SSH_PUBLIC_KEY_HERE` with your actual SSH public key.
- Replace `helm_repo_where_axonops_is_hosted` with the Helm repository where the axonops chart is hosted. If it's a public chart, you could potentially find it on repositories like `stable` or `bitnami`.
- Replace `chart_version` with the specific version of the axonops chart you want to deploy. If you leave it unspecified, the latest version will be used by default, which is often not recommended for production scenarios, as you want to have precise control over what versions are running.

To apply this Pulumi program:
1. Save the code in a file with a `.ts` extension, for instance, `deploy.ts`.
2. Initialize a Pulumi project and configure Azure with `pulumi new azure-typescript` and follow the prompts.
3. Replace the contents of `index.ts` with the content of `deploy.ts`.
4. Run `pulumi up` in your terminal and review the proposed infrastructure changes.
5. Confirm the changes by selecting "yes", and Pulumi will provision the resources and deploy the axonops Helm chart on AKS.

Remember, managing infrastructure as code has implications for security and stability. Please ensure that you manage your SSH keys and service credentials securely, and review all changes to your infrastructure carefully.