Deploy the sonatype-nexus helm chart on Azure Kubernetes Service (AKS)

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Pulumi · Accepted Answer

To deploy the Sonatype Nexus helm chart on Azure Kubernetes Service (AKS), you'll need to perform the following steps:

1. Provision an AKS cluster using Pulumi's Azure Native provider.
2. Deploy the Sonatype Nexus helm chart to your AKS cluster using Pulumi's Kubernetes provider.

Let's walk through the complete process:

### Step 1: Provision an AKS Cluster

Firstly, you need to create an AKS cluster where your applications will run. To do this, you'll use the [azure-native.hybridcontainerservice.ProvisionedCluster](https://www.pulumi.com/registry/packages/azure-native/api-docs/hybridcontainerservice/provisionedcluster/) resource. This resource allows you to provision a managed AKS cluster that Azure will maintain for you.

### Step 2: Deploy the Helm Chart

After your AKS cluster is ready, you will deploy the Sonatype Nexus helm chart to it. For this, you'll use the [kubernetes.helm.v3.Chart](https://www.pulumi.com/registry/packages/kubernetes/api-docs/helm/v3/chart/) resource. This resource represents a helm chart, which is a collection of pre-configured Kubernetes resources that can be managed as a unit.

Below is the TypeScript program that completes the process:

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

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

const aksCluster = new azure_native.hybridcontainerservice.ProvisionedCluster("myAKSCluster", {
    resourceGroupName: resourceGroup.name,
    identity: {
        type: "SystemAssigned",
    },
    location: resourceGroup.location,
    properties: {
        // Declare other necessary AKS properties here
        // For example:
        kubernetesVersion: "1.20.9", 
        agentPoolProfiles: [{
            count: 3,       // Specify the number of nodes
            vmSize: "Standard_DS2_v2", // Specify the VM size
            osType: "Linux", // Specify the OS type
            mode: "System",  // Specify the mode for the node pool
        }],
        linuxProfile: {
            adminUsername: "adminuser",
            ssh: {
                publicKeys: [{
                    keyData: "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC...",
                }],
            },
        },
    },
});

// Step 2: Deploy Sonatype Nexus using Helm Chart
const k8sProvider = new k8s.Provider("k8sProvider", {
    kubeconfig: aksCluster.kubeConfigRaw, // This is how you authenticate to the AKS cluster
});

const nexusHelmChart = new k8s.helm.v3.Chart("nexus", {
    chart: "sonatype-nexus",
    version: "1.24.0", // Use the version that fits your requirements
    fetchOpts:{
        repo: "https://sonatype.github.io/helm3-charts/", // Nexus Helm repo URL
    },
}, { provider: k8sProvider });

// Export the kubeconfig
export const kubeConfig = aksCluster.kubeConfigRaw;
```

This program will do the following:
- Create a resource group that will contain all the resources related to the AKS cluster.
- Provision an AKS cluster within the resource group with a specified number of nodes, VM size, and other relevant configurations.
- Configure a Kubernetes provider to interact with the newly created AKS cluster.
- Deploy the Sonatype Nexus helm chart to the AKS cluster.

Note that you need to replace the `ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC...` with your actual public SSH key data. And you need to have an SSH key pair generated in order to provide the SSH public key for AKS access.

Also, be sure that you're authenticated with Azure and have the necessary permissions to create these resources before running the Pulumi program.

Finally, the program exports `kubeConfig`, which is the raw kubeconfig content for the AKS cluster. You can use this output to configure kubectl or other Kubernetes tools to connect to and interact with your AKS cluster.