Deploy the s3manager helm chart on Azure Kubernetes Service (AKS)

Question

Pulumi · Accepted Answer

To deploy the `s3manager` Helm chart on Azure Kubernetes Service (AKS), you'll need to follow a series of steps. I'll guide you through each step:

1. **Set up an AKS cluster**: You need an AKS cluster where your Helm chart will be deployed. Using Pulumi, you can define and create a cluster in code.
2. **Configure K8s provider to use the cluster**: Once the cluster is up and running, you'll need to configure Pulumi's Kubernetes provider to interact with the AKS cluster so you can deploy Helm charts.
3. **Deploy the Helm Chart**: Finally, you will define the Helm release for the `s3manager` chart and deploy it to your AKS cluster.

Assuming you have Pulumi installed and configured for use with your Azure account, this TypeScript program demonstrates how you could achieve these steps:

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

const projectName = pulumi.getProject();

// Step 1: Create an Azure Resource Group
const resourceGroup = new azure.core.ResourceGroup("my-resource-group", {
    location: "West US",
});

// Step 2: Create an Azure AD Service Principal for the AKS cluster
const adApp = new azuread.Application("aks");
const adSp = new azuread.ServicePrincipal("aksSp", {
    applicationId: adApp.applicationId,
});

// Step 3: Grant the Service Principal permissions to the Resource Group
const adSpPassword = new azuread.ServicePrincipalPassword("aksSpPassword", {
    servicePrincipalId: adSp.id,
    value: "a-really-strong-password-here",
    endDate: "2099-01-01T00:00:00Z", // Replace as appropriate.
});

// Step 4: Create a VirtualNetwork for the AKS cluster
const vnet = new azure.network.VirtualNetwork("vnet", {
    resourceGroupName: resourceGroup.name,
    addressSpaces: ["10.0.0.0/16"],
});

// Step 5: Create a Subnet for the AKS cluster
const subnet = new azure.network.Subnet("subnet", {
    resourceGroupName: resourceGroup.name,
    virtualNetworkName: vnet.name,
    addressPrefix: "10.0.1.0/24",
});

// Step 6: Configure the AKS cluster
const cluster = new azure.containerservice.KubernetesCluster("aksCluster", {
    resourceGroupName: resourceGroup.name,
    agentPoolProfiles: [{
        name: "aksagentpool",
        count: 1,
        vmSize: "Standard_B2s",
        osType: "Linux",
        minCount: 1,
        maxCount: 2,
        type: "VirtualMachineScaleSets",
        vnetSubnetId: subnet.id,
        mode: "System",
    }],
    dnsPrefix: projectName,
    linuxProfile: {
        adminUsername: "aksuser",
        sshKey: {
            keyData: sshPublicKey,
        },
    },
    servicePrincipal: {
        clientId: adSp.applicationId,
        clientSecret: adSpPassword.value,
    },
    kubernetesVersion: "1.18.14",
    roleBasedAccessControl: {
        enabled: true,
    },
    networkProfile: {
        networkPlugin: "azure", // Using Azure CNI
        serviceCidr: "10.0.2.0/24",
        dnsServiceIp: "10.0.2.10",
        dockerBridgeCidr: "172.17.0.1/16",
    },
});

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

// Step 7: Configure the Kubernetes provider to manage resources in the new cluster
const k8sProvider = new k8s.Provider("k8sProvider", {
    kubeconfig: kubeconfig,
});

// Step 8: Deploy the `s3manager` Helm chart
const s3managerChart = new k8s.helm.v2.Chart("s3manager", {
    repo: "my-repo", // Ensure to replace with actual Helm repository
    chart: "s3manager",
    version: "1.0.0", // Use appropriate chart version
    values: {}, // Fill with any required Helm values here
}, { provider: k8sProvider });

// Export the s3manager service endpoint
export const s3managerEndpoint = pulumi.all([cluster.name, resourceGroup.name])
    .apply(([clusterName, rgName]) => `http://${clusterName}.${rgName}.example.com`);  // Modify with actual domain
```

Let's break down what these steps are doing:

- **Step 1**: Set up a new Azure Resource Group that will contain all the resources for the AKS cluster.
- **Step 2 - Step 3**: Create an Azure Active Directory application and service principal that AKS will use to manage resources on your behalf. Assign a password to the service principal.
- **Step 4 - Step 5**: Set up the required networking infrastructure by creating a Virtual Network and a Subnet for the AKS cluster nodes.
- **Step 6**: Define the AKS cluster, including VM specs for the nodes, the version of Kubernetes, and networking profiles.
- **Step 7**: Using the `kubeconfig` output from the AKS cluster, you'll define the Pulumi Kubernetes provider that we'll use to deploy the Helm chart.
- **Step 8**: Deploy the `s3manager` Helm chart using Pulumi's Kubernetes provider.

Please note that you need to replace placeholder values such as `sshPublicKey`, `my-repo` and chart `version` with actual values that you will be using for your deployment.

When you apply this Pulumi program, it will create the AKS cluster and deploy the `s3manager` Helm chart. You can view the outcome in the Azure Portal or by using the `kubectl` CLI tool with the kubeconfig file that gets exported at the end of the process.

Remember to install all the necessary Pulumi and provider packages using `npm` or `yarn` before you run `pulumi up` to execute this program.