Deploy the nuxt3 helm chart on Azure Kubernetes Service (AKS)

Question

Pulumi · Accepted Answer

To deploy the Nuxt3 Helm chart on Azure Kubernetes Service (AKS), we will go through the following steps:

1. **Set up the AKS cluster**: To host our applications on Kubernetes, we need to provision an AKS cluster. This will be a managed Kubernetes service provided by Azure where we can deploy containerized applications.

2. **Install the Helm chart for Nuxt3**: Helm is a package manager for Kubernetes that allows you to define, install, and upgrade even the most complex Kubernetes applications. Nuxt3 doesn't have an official Helm chart as of my knowledge cutoff, but you can either use a community-maintained chart or create your own. For this example, I will assume that a Helm chart for Nuxt3 is available either in a Helm repository or as a file.

Below is the Pulumi program written in TypeScript to demonstrate these steps:

```typescript
import * as pulumi from '@pulumi/pulumi';
import * as azure from '@pulumi/azure';
import * as k8s from '@pulumi/kubernetes';
import * as azuread from '@pulumi/azuread';
import * as random from '@pulumi/random';

// Step 1: Provision an AKS cluster
// Configure the Azure location to deploy resources in.
const location = azure.core.Locations.WestUS2;

// Create a resource group for the AKS cluster
const resourceGroup = new azure.core.ResourceGroup('aksResourceGroup', { location });

// Create an Azure AD application for AKS
const adApp = new azuread.Application('aks');

// Create a service principal for the application so AKS can act on behalf of the application
const adSp = new azuread.ServicePrincipal('aksSp', { applicationId: adApp.applicationId });

// Generate a random password for the service principal
const password = new random.RandomPassword('password', {
    length: 20,
    special: true,
}).result;

const adSpPassword = new azuread.ServicePrincipalPassword('aksSpPassword', {
    servicePrincipalId: adSp.id,
    value: password,
    endDate: '2099-01-01T00:00:00Z', // far in the future
});

// Now we have all the pieces needed to create an AKS cluster, so let's create it
const k8sCluster = new azure.containerservice.KubernetesCluster('aksCluster', {
    resourceGroupName: resourceGroup.name,
    location,
    agentPoolProfiles: [{
        name: 'aksagentpool',
        count: 2,
        vmSize: azure.containerservice.VirtualMachineSizeTypes.Standard_DS2_v2,
    }],
    dnsPrefix: `${pulumi.getStack()}-kube`,
    linuxProfile: {
        adminUsername: 'adminuser',
        sshKeys: [{ keyData: adSpPassword.value }],
    },
    servicePrincipal: {
        clientId: adApp.applicationId,
        clientSecret: adSpPassword.value,
    },
});

// Step 2: Install the Nuxt3 Helm Chart
// First, ensure we have a Kubeconfig file for the created AKS cluster
const kubeconfig = pulumi.
    all([k8sCluster.name, resourceGroup.name]).
    apply(([clusterName, rgName]) => azure.containerservice.getKubeConfig({
    name: clusterName,
    resourceGroupName: rgName,
}));

// Use Pulumi's Kubernetes provider to connect to the AKS cluster and deploy resources
const k8sProvider = new k8s.Provider('k8sProvider', {
    kubeconfig: kubeconfig.rawConfig,
});

// Deploy the Nuxt3 Helm chart
const nuxt3Chart = new k8s.helm.v3.Chart('nuxt3-helm-chart', {
    // Assuming we have a repository that hosts our Nuxt3 chart
    // Replace `repoUrl` and `chart` with actual values for your use case.
    repo: 'myhelmrepo',
    chart: 'nuxt3',
    version: '1.0.0', 
    // The namespace to deploy into; create if it doesn't exist
    namespace: 'nuxt-namespace',
    values: {
        // Values to pass to the Helm chart.
        // Replace with the appropriate values based on the chart's configuration.
    },
}, { provider: k8sProvider });

// Export the kubeconfig to comply with best practices which favor explicit references over config.
export const kubeConfigOutput = kubeconfig.rawConfig;

// Export the public IP to access the Nuxt3 application after deployment
export const servicePublicIP = nuxt3Chart.getResourceProperty('v1/Service', 'nuxt3-service', 'status').apply(status => status.loadBalancer.ingress[0].ip);
```

Here's a breakdown of what's happening in the code above:

- We start by setting up a new Azure Resource Group to hold our AKS resources.
- Then we create an Azure Active Directory application and a corresponding service principal needed by AKS to interact with other Azure services.
- We generate a random password for the service principal to use.
- We create the AKS cluster with a specification for the number of nodes, VM size, admin user, and the service principal credentials.
- Once the cluster is up, we obtain the kubeconfig which is required to communicate with the Kubernetes API server.
- Using Pulumi's Kubernetes provider, we deploy the Nuxt3 Helm chart into the AKS cluster. We specify the repo and chart name, a namespace to deploy to, and pass in values to configure the chart as required.
- We then export the kubeconfig and the IP address of the service so we can connect to the deployed Nuxt3 application.

To run this Pulumi program:

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

This program assumes you have Pulumi set up and authenticated with Azure. It will provision the AKS cluster and deploy Nuxt3 onto it using a Helm chart. Make sure to replace placeholders (like repository information and chart values) with actual data based on your Helm chart's needs.