1. Deploy the kube-metrics-adapter helm chart on Digital Ocean Kubernetes Service


    To deploy the kube-metrics-adapter Helm chart on a Digital Ocean Kubernetes Service (DOKS) with Pulumi, you will be doing the following steps:

    1. Create a Digital Ocean Kubernetes Cluster: You'll set up a DOKS cluster, which is a managed Kubernetes service provided by Digital Ocean.

    2. Install the kube-metrics-adapter Helm Chart: Using Pulumi's Kubernetes provider, you'll deploy the kube-metrics-adapter Helm chart to the DOKS cluster. Helm is a package manager for Kubernetes, and Helm charts are packages of pre-configured Kubernetes resources.

    Below is a Pulumi TypeScript program that accomplishes these tasks. The program is structured into two main parts: the cluster creation and the Helm chart deployment. After the cluster is provisioned, Pulumi can install the Helm chart into the cluster.

    To work with Digital Ocean, Pulumi uses the @pulumi/digitalocean package. For working with Kubernetes resources, including Helm charts, Pulumi uses the @pulumi/kubernetes package.

    Please ensure you have the following prerequisites before running the code:

    • Pulumi CLI installed.
    • Digital Ocean access token and Kubernetes configuration set up in your Pulumi environment.
    • The appropriate Pulumi stack selected or a new one created for this deployment.
    import * as pulumi from "@pulumi/pulumi"; import * as digitalocean from "@pulumi/digitalocean"; import * as k8s from "@pulumi/kubernetes"; // Create a Digital Ocean Kubernetes cluster const cluster = new digitalocean.KubernetesCluster("doks-cluster", { region: "nyc1", // Choose the region according to your preference version: "latest", // Use the latest available version of Kubernetes nodePool: { name: "default", size: "s-2vcpu-2gb", // Choose the node size that best fits your needs nodeCount: 2, // Number of nodes in the node pool }, }); // Export the kubeconfig to access the cluster with kubectl export const kubeconfig = cluster.kubeConfigs[0].rawConfig; // Deploy the kube-metrics-adapter Helm chart to the DOKS cluster const kubeMetricsAdapterChart = new k8s.helm.v3.Chart("kube-metrics-adapter-chart", { chart: "kube-metrics-adapter", fetchOpts: { repo: "https://kedacore.github.io/charts", // Replace with the repository containing kube-metrics-adapter }, namespace: "kube-system", // Deploy the chart in the kube-system namespace (or choose a different namespace) // Values to override chart defaults if necessary values: {}, }, { provider: new k8s.Provider("k8s-provider", { kubeconfig: kubeconfig, }), }); // Export the Helm chart deployment status export const helmDeploymentStatus = kubeMetricsAdapterChart.status; // To apply this program to your Digital Ocean account: // Run `pulumi up` and follow the on-screen prompts.

    This Pulumi program starts by importing the necessary Pulumi libraries for Digital Ocean and Kubernetes. Then, it defines a new Digital Ocean Kubernetes cluster. After the cluster creation, Pulumi exports the kubeconfig, which is needed to interact with the cluster (e.g., using kubectl).

    Next, the program deploys the kube-metrics-adapter Helm chart to the created DOKS cluster using Pulumi's Kubernetes provider, @pulumi/kubernetes. Notice the provider property in the Helm chart resource which specifies that the Helm chart should be deployed using the kubeconfig from the Digital Ocean cluster you just created.

    Lastly, the program exports a helmDeploymentStatus variable, which will display the status of the Helm chart deployment once the Pulumi program is executed.

    To run this Pulumi program:

    • Install the required packages: npm install @pulumi/pulumi @pulumi/digitalocean @pulumi/kubernetes
    • Save the above TypeScript code in a file called index.ts.
    • Execute pulumi up using the Pulumi CLI, review the proposed infrastructure changes, and confirm the deployment.

    Once the deployment is successful, you will have a Digital Ocean Kubernetes cluster with the kube-metrics-adapter installed. You can use the exported kubeconfig to interact with your cluster and validate the Helm chart deployment.