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

Question

Pulumi · Accepted Answer

To deploy the `ublhub` Helm chart on Azure Kubernetes Service (AKS) using Pulumi, you will go through several stages:

1. **Setting up AKS**: We will create an AKS cluster, which involves specifying the node count, VM size, and other configurations.
2. **Deploying the Helm Chart**: Using the Helm Pulumi provider, we will deploy the `ublhub` Helm chart into our AKS cluster.

Below is a Pulumi TypeScript program that demonstrates these steps.

Make sure you have the necessary Pulumi packages installed in your project. If not, you can add them using these commands:

```sh
pulumi plugin install resource azure-native 2.11.0
pulumi plugin install resource kubernetes 4.4.0
```

Here's the complete Pulumi program:

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

// Create an Azure Resource Group
const resourceGroup = new azure.resources.ResourceGroup("resourceGroup");

// Create an AKS cluster
const cluster = new azure.containerservice.ManagedCluster("aksCluster", {
    resourceGroupName: resourceGroup.name,
    agentPoolProfiles: [{
        count: 3, // The desired number of member nodes in the agent pool
        maxPods: 110, // The maximum number of pods per node
        mode: azure.containerservice.AgentPoolMode.System,
        osType: azure.containerservice.OSType.Linux,
        vmSize: azure.containerservice.ContainerServiceVMSizeTypes.Standard_D2s_v3,
    }],
    dnsPrefix: "akscluster", // A DNS prefix for the cluster
    enableRBAC: true, // Enable Kubernetes RBAC for the cluster
    kubernetesVersion: "1.22.5", // The version of Kubernetes to use
    sku: {
        name: "Basic",
        tier: "Free"
    },
});

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

// Create a Kubernetes provider instance using the kubeconfig from AKS
const k8sProvider = new k8s.Provider("k8sProvider", {
    kubeconfig: cluster.kubeConfigRaw,
});

// Deploy the ublhub helm chart
const ublhubChart = new k8s.helm.v3.Chart("ublhub", {
    chart: "ublhub", // The name of the chart
    // You might need to specify the repository using `repo` property, if it's not a stable chart
    values: { /* ... */ }, // Values to configure the chart
    version: "1.2.3", // The chart version to deploy
}, { provider: k8sProvider });

// Expose the required information from the Helm chart, like service URLs and other data
export const helmValues = ublhubChart.values;
```

The above program will perform the following actions:

1. `ResourceGroup` resource creates a new group in Azure to hold our AKS-related services.
2. `ManagedCluster` resource sets up a new AKS cluster with three nodes of size 'Standard_D2s_v3'.
3. The output `kubeconfig` would give you the configuration needed to connect to the AKS cluster with `kubectl`.
4. `Provider` resource creates a Kubernetes provider initialized with the AKS cluster's kubeconfig.
5. `Chart` resource then deploys the Helm chart to the AKS cluster using the values provided.

The `values` field in the Helm chart needs to be customized according to the specifics of the `ublhub` chart, and if the chart isn't part of the official Helm stable charts, you'll also need to specify the `repo` property with the URL to the Helm chart repository.

Remember to replace `"1.2.3"` with the actual version number of the `ublhub` Helm chart you intend to deploy.

### How to run this Pulumi program:
To use this program, you would:

1. Create a new directory for your Pulumi project.
2. Run `pulumi new typescript` in your terminal to initialize a new Pulumi TypeScript project.
3. Replace the contents of `index.ts` with the program provided above.
4. Run `npm install` to get all the necessary node modules.
5. Run `pulumi up` to deploy the AKS cluster and the Helm chart.

This will trigger the setup of the AKS cluster, and once that's completed, the Helm chart for `ublhub` will be deployed using the configurations defined.