1. Deploy the ingress-controller helm chart on Azure Kubernetes Service (AKS)


    Deploying an ingress controller on Azure Kubernetes Service (AKS) using a Helm chart involves the following high-level steps:

    1. Provision an AKS Cluster: First, you'll need an AKS cluster where the ingress controller will be deployed. Pulumi can create and manage AKS clusters using the ProvisionedCluster resource from the azure-native provider.

    2. Install the Helm Chart: After the cluster is up and running, you'll install the ingress controller's Helm chart. This Helm chart is a pre-packaged set of Kubernetes resources that Pulumi can deploy using the Chart resource from the kubernetes provider.

    Below is a TypeScript program that demonstrates these steps using Pulumi. Remember to have your Azure credentials and Pulumi CLI configured before running this program.

    Detailed Program Explanation and Code

    The first part of the program creates an AKS cluster. I'm using the ProvisionedCluster resource from the azure-native provider because it's the native Azure resource provided by Pulumi, allowing for direct interaction with Azure's APIs.

    Once the AKS cluster is provisioned, I use the Chart resource from the kubernetes provider to install the Helm chart for the ingress controller. Helm charts are a convenient way to package and deploy Kubernetes applications.

    Here's the full Pulumi program in TypeScript:

    import * as pulumi from "@pulumi/pulumi"; import * as azure_native from "@pulumi/azure-native"; import * as k8s from "@pulumi/kubernetes"; // Step 1: Provision an AKS Cluster const resourceGroup = new azure_native.resources.ResourceGroup("aksResourceGroup", { // Location is where your resources will be created. This can be changed as required. location: "EastUS", }); const aksCluster = new azure_native.containerservice.ManagedCluster("aksCluster", { resourceGroupName: resourceGroup.name, // Change the location to match your resource group or a preferred region location: resourceGroup.location, // Specify the properties for the AKS cluster as required, such as node size, count, etc. agentPoolProfiles: [{ count: 1, maxPods: 110, mode: "System", name: "agentpool", osType: "Linux", vmSize: "Standard_DS1_v2", }], dnsPrefix: pulumi.getStack(), // Generates a DNS prefix using the stack name kubernetesVersion: "1.18.14", // Specify the desired Kubernetes version }); // Export the kubeconfig (it contains credentials, handle with care!) export const kubeconfig = pulumi. all([resourceGroup.name, aksCluster.name]). apply(([rgName, clusterName]) => { return azure_native.containerservice.listManagedClusterUserCredentials({ resourceGroupName: rgName, resourceName: clusterName, }).then(credentials => { const encoded = credentials.kubeconfigs[0].value; if (encoded == null) { throw new Error("Kubeconfig was not generated"); } return Buffer.from(encoded, 'base64').toString(); }); }); // Step 2: Install the ingress-controller Helm Chart on the AKS cluster const k8sProvider = new k8s.Provider("k8sProvider", { kubeconfig: kubeconfig, }); const ingressControllerChart = new k8s.helm.v3.Chart("nginx-ingress", { chart: "nginx-ingress", // Replace with the appropriate Helm repo URL or name fetchOpts: { repo: "https://helm.nginx.com/stable", }, version: "1.41.2", // Use the version number for the ingress-controller you wish to deploy namespace: "default", // Define the Kubernetes namespace where the Helm chart should be installed }, { provider: k8sProvider }); // Outputs export const clusterName = aksCluster.name; export const ingressControllerStatus = ingressControllerChart.status;

    Let's break down the code:

    • Resource Group: A resource group is created as a logical container in which the AKS cluster will reside.
    • Managed Cluster: Defines properties for the AKS cluster, such as size and count of VMs, Kubernetes version, etc.
    • Kubeconfig: Once the AKS cluster is created, we retrieve the kubeconfig, which is needed to communicate with the cluster.
    • Kubernetes Provider: Pulumi's way of encapsulating the kubeconfig retrieval and abstracting the K8s API access.
    • Helm Chart: We use the Chart class to install the nginx ingress controller with the specified version and repository.

    Once the program is written, you will deploy it using these Pulumi CLI commands:

    pulumi up # Preview and deploy changes pulumi stack # Manage stacks pulumi destroy # Destroy all resources

    Do handle the outputs with care, especially kubeconfig as it contains sensitive credentials required to access your AKS cluster. Save it securely and avoid exposing it in logs or to unauthorized users.