1. Deploy the spring-boot-rest-http helm chart on Linode Kubernetes Engine


    To deploy a Helm chart on a Linode Kubernetes Engine (LKE) cluster using Pulumi, you'll follow these steps:

    1. Set up Pulumi to work with the Linode provider and Kubernetes provider.
    2. Create an LKE cluster if you don't have one already.
    3. Get kubeconfig from the newly created LKE cluster to communicate with it.
    4. Use the kubernetes provider to deploy the Helm chart to your LKE cluster.

    In this guide, I'll show you how to use Pulumi's TypeScript to accomplish these tasks. You'll be using the @pulumi/linode and @pulumi/kubernetes packages. The Helm chart we're deploying is spring-boot-rest-http, which is often available from common Helm chart repositories.

    Here's a complete program that sets up an LKE cluster and deploys a Spring Boot REST HTTP Helm chart to it:

    import * as pulumi from "@pulumi/pulumi"; import * as linode from "@pulumi/linode"; import * as k8s from "@pulumi/kubernetes"; // Step 1: Create a new Linode Kubernetes Engine cluster const cluster = new linode.LkeCluster("lke-cluster", { label: "lke-cluster", region: "us-central", k8sVersion: "1.21", nodePools: [{ type: "g6-standard-2", count: 2, }], }); // Step 2: Export the kubeconfig to connect with the Kubernetes cluster export const kubeconfig = cluster.kubeconfig; // Define a provider to manage resources in the LKE Kubernetes cluster const k8sProvider = new k8s.Provider("k8s-provider", { kubeconfig: cluster.kubeconfig, }); // Step 3: Deploy the Helm chart for the Spring Boot application const chart = new k8s.helm.v3.Chart("spring-boot-rest-http", { chart: "spring-boot-rest-http", version: "0.1.0", // Specify the version of the chart you want to deploy fetchOpts: { repo: "https://helm-repo-url.com", // Replace with the actual repo URL }, }, {provider: k8sProvider}); // Optional: Export the endpoint of the deployed Spring Boot service export const endpoint = chart.getResourceProperty("v1/Service", "spring-boot-rest-http-service", "status") .apply(status => `http://${status.loadBalancer.ingress[0].ip}:8080`);

    Explanation of the components:

    • linode.LkeCluster: This resource is used to create a new Linode Kubernetes Engine cluster in your Linode account.
    • kubeconfig: This export provides the credentials necessary to control your Kubernetes cluster. You would use this kubeconfig file with kubectl or other Kubernetes management tools.
    • k8s.Provider: This Pulumi provider is for Kubernetes, allowing Pulumi to deploy resources to your Kubernetes cluster.
    • k8s.helm.v3.Chart: This resource is used for deploying a Helm chart. Here we're deploying spring-boot-rest-http, which is a placeholder for the actual Helm chart you wish to deploy. You'd replace "https://helm-repo-url.com" with the real URL to the Helm repository that hosts your chart.
    • endpoint: This is an optional export that would give you the external endpoint to access your Spring Boot application, assuming that the Helm chart creates a Service of type LoadBalancer.

    Remember to replace https://helm-repo-url.com with the actual repository URL where your Helm chart is hosted. The version field should be replaced with the version of the chart you intend to deploy. If your Helm chart is located in a public repository like Helm's official charts or Bitnami, the fetchOpts.repo would correspond to the URL of those repositories.

    It's important to note that when you run this Pulumi program, it will create a new LKE cluster, which incurs costs according to Linode's pricing. Make sure to destroy the resources with pulumi destroy when you're done, if you don't want to keep them running.

    Before you run this program, ensure that you have the Linode CLI configured with the necessary credentials as per the Linode Pulumi Provider documentation.

    To run the Pulumi program:

    1. Save this code to a file named index.ts.
    2. Run pulumi up to preview and deploy the changes.