1. Deploy the squareone helm chart on Linode Kubernetes Engine


    When you want to deploy a Helm chart to a Kubernetes cluster using Pulumi, you'll typically need to do the following:

    1. Set up the Kubernetes cluster where you will deploy the Helm chart.
    2. Configure Pulumi to manage resources in that cluster.
    3. Use Pulumi's Chart resource from the Kubernetes provider to deploy the Helm chart to your cluster.

    For this case, we assume that you have already provisioned a Linode Kubernetes Engine (LKE) cluster and have the kubeconfig file available to interact with your Kubernetes cluster.

    You'll begin by installing the needed Pulumi packages. For TypeScript, you use npm to install packages:

    npm install @pulumi/pulumi @pulumi/kubernetes

    Then, you can write a Pulumi program to deploy the Helm chart. Below is a TypeScript program that accomplishes this. The Chart resource is a component resource that encapsulates deploying the Helm chart from a repository.

    import * as pulumi from "@pulumi/pulumi"; import * as k8s from "@pulumi/kubernetes"; // You must be authenticated with your Kubernetes cluster // Pulumi uses the kubeconfig file to communicate with the cluster const kubeconfig = process.env.KUBECONFIG; // Create a Kubernetes provider instance using the kubeconfig from Linode const provider = new k8s.Provider("lke-k8s-provider", { kubeconfig: kubeconfig, }); // Deploy the "squareone" Helm chart into the Kubernetes cluster const squareoneChart = new k8s.helm.v3.Chart("squareone", { chart: "squareone", // Name of the Helm chart version: "1.0.0", // Version of the Helm chart, specify the version you need // If the chart is from a custom repository, you can specify it like this // repo: "http://charts.example.com/", // You can pass configuration values for the Helm chart like this // values: { // service: { // type: "LoadBalancer", // }, // }, }, { provider }); // Export the endpoint of the deployed application/service export const squareoneEndpoint = squareoneChart.getResourceProperty("v1/Service", "squareone-service", "status").apply(status => status.loadBalancer.ingress[0].ip);

    To apply this deployment, run pulumi up in the terminal, and the Pulumi CLI will provision the resources as described.

    Let's break down what's happening:

    • kubeconfig variable is used to store the path to your kubeconfig file, which allows Pulumi to authenticate with your LKE cluster.
    • A Kubernetes provider instance is set up to interface with your cluster.
    • A Chart resource is declared with new k8s.helm.v3.Chart. This is where you specify the Helm chart name, version, and custom values, if any. If your Helm chart is in a custom repository, you would include the repo property and set it to your chart's repository URL.
    • Additionally, a provider option is passed to the Chart resource to specify which Kubernetes provider to use.
    • Finally, an export is included to provide the endpoint of the application once it's deployed, assuming your chart creates a Service resource with the type LoadBalancer.

    Remember, this program assumes that the Helm chart "squareone" exists and is publicly available. If it's a private chart or hosted in a custom Helm repository, additional configuration would be necessary. Also, if the Helm chart requires setting custom values, you would include a values field with an object representing those values.