1. Deploy the openshift-kube-state-metrics helm chart on Azure Kubernetes Service (AKS)


    To deploy the openshift-kube-state-metrics Helm chart on Azure Kubernetes Service (AKS), you need to set up a few resources:

    1. Azure Resource Group: A resource container that holds related resources for an Azure solution.
    2. AKS Cluster: An Azure Kubernetes Service cluster where openshift-kube-state-metrics will be deployed.
    3. Helm Chart: The Helm chart itself that contains the package of the pre-configured Kubernetes resources needed to run openshift-kube-state-metrics.

    We will use Pulumi Azure provider to create the AKS cluster. Then, we'll utilize the Pulumi Kubernetes provider to deploy the openshift-kube-state-metrics Helm chart.

    Below is the Pulumi program written in TypeScript that demonstrates how to accomplish this:

    import * as pulumi from '@pulumi/pulumi'; import * as azure from '@pulumi/azure'; import * as k8s from '@pulumi/kubernetes'; // Create a resource group const resourceGroup = new azure.core.ResourceGroup('myResourceGroup', { // Provide your location, any valid Azure location is acceptable location: azure.Locations.WestUS2, }); // Create an AKS cluster const cluster = new azure.containerservice.KubernetesCluster('myAKSCluster', { resourceGroupName: resourceGroup.name, location: resourceGroup.location, defaultNodePool: { name: 'default', nodeCount: 2, // You can specify the number of nodes here vmSize: 'Standard_D2_v2', }, dnsPrefix: 'kube-aks', // Your unique AKS DNS prefix servicePrincipal: { clientId: process.env.AZURE_CLIENT_ID, clientSecret: process.env.AZURE_CLIENT_SECRET, }, }); // Export the kubeconfig to access the AKS cluster export const kubeConfig = cluster.kubeConfigRaw; // Create a kubernetes provider using the kubeconfig const k8sProvider = new k8s.Provider('aksK8s', { kubeconfig: kubeConfig, }); // Define the Helm chart, version, and repository const chart = 'kube-state-metrics'; const version = '1.9.7'; // The version can change, use an appropriate chart version const repo = 'https://helm.openshift.io/'; // The URL of the helm chart repository // Deploy the helm chart using the kubernetes provider const kubeStateMetrics = new k8s.helm.v3.Chart('kube-state-metrics', { chart: chart, fetchOpts:{ repo: repo, }, version: version, namespace: 'kube-system', // Deploying to the 'kube-system' namespace }, { provider: k8sProvider }); // Export the deployment name export const kubeStateMetricsName = kubeStateMetrics.metadata.apply(m => m.name);

    Let's explain this code step-by-step:

    1. We import the required Pulumi modules. The pulumi module provides core Pulumi functionalities. The azure module contains resources that allow interaction with Azure. The kubernetes module contains the Kubernetes provider and related resources.

    2. We create an Azure ResourceGroup, which is a container that holds related resources for an Azure solution.

    3. We proceed by creating an AKS cluster named myAKSCluster. Replace process.env.AZURE_CLIENT_ID and process.env.AZURE_CLIENT_SECRET with your Azure service principal credentials.

    4. The kubeConfig output from the AKS cluster is exported so that it can be used outside of Pulumi for direct kubectl interactions.

    5. A kubernetes.Provider named aksK8s is created using the kubeConfig. This provider is responsible for managing the Kubernetes resources.

    6. We then define the Helm chart from a repository. For this example, we're using the kube-state-metrics Helm chart that’s hypothetically stored in the OpenShift Helm chart repository.

    7. We deploy the kube-state-metrics Helm chart into the kube-system namespace of the AKS cluster.

    8. Lastly, we export the name of the deployed kube-state-metrics service for reference. This can be useful if you want to interact with the service after its deployment.

    This program should be executed with the Pulumi CLI, and you should have the following prerequisites satisfied:

    • An Azure account with the necessary permissions to create resources.
    • Service principal credentials for Azure.
    • The Pulumi CLI installed and configured.
    • Node.js and NPM installed to run TypeScript programs.

    Once you run this program using the Pulumi CLI with pulumi up, it will provision the resources as specified and deploy the helm chart to the AKS cluster. Ensure to set the environment variables AZURE_CLIENT_ID and AZURE_CLIENT_SECRET with the respective credentials before running the command.