1. Deploy the heartbeat helm chart on Linode Kubernetes Engine


    To deploy the Heartbeat Helm chart on Linode Kubernetes Engine using Pulumi, we will perform the following steps:

    1. Setup the Kubernetes Cluster on Linode: We'll create a Linode Kubernetes cluster where our applications will run. We won't cover the creation of the cluster in this example, but it's assumed you have configured kubeconfig to interact with your cluster.

    2. Install the Heartbeat Helm Chart: We'll define a Pulumi program that makes use of the Helm Chart resource to deploy Heartbeat. Heartbeat is a lightweight daemon that you can install on your servers to monitor their health.

    Before we begin with the Pulumi program, make sure you have the following prerequisites covered:

    • Install Pulumi.
    • Set up Linode CLI and create a cluster.
    • Configure kubeconfig to interact with your Linode Kubernetes cluster.
    • Install Node.js and npm to run the TypeScript program.

    Given below is a TypeScript Pulumi program that deploys the Heartbeat Helm chart onto a Kubernetes cluster hosted on Linode. You will need to specify the Helm chart details such as the repository URL, chart name, and optionally the chart version and any custom values you want to apply.

    import * as k8s from "@pulumi/kubernetes"; // Create an instance of the k8s.Provider pointing to the Linode cluster. const linodeProvider = new k8s.Provider("linodeK8s", { kubeconfig: "<YOUR_KUBECONFIG_CONTENTS>", }); // Deploy the Heartbeat Helm chart. const heartbeatChart = new k8s.helm.v3.Chart("heartbeat", { chart: "heartbeat", version: "<HELM_CHART_VERSION>", // specify the version of the Heartbeat Helm chart you wish to deploy fetchOpts: { repo: "https://helm.elastic.co", }, // Define any custom values you want to pass to the Helm chart. values: { // Custom values like replica count, image version, etc. }, }, { provider: linodeProvider }); export const heartbeatChartName = heartbeatChart.name; export const heartbeatChartStatus = heartbeatChart.status;

    In this program:

    • We import the @pulumi/kubernetes module, which allows us to interact with Kubernetes clusters.
    • We create a Pulumi Kubernetes provider instance for our Linode cluster. To do this securely, replace <YOUR_KUBECONFIG_CONTENTS> with the actual contents of your kubeconfig file.
    • We then define a Helm chart resource using new k8s.helm.v3.Chart. You will need to specify the chart's version you want to use by replacing <HELM_CHART_VERSION> with the actual version. If you're uncertain about the version, you can omit that property, and the latest version will be installed.
    • We set the fetchOpts.repo option to point to the official Elastic Helm chart repository so Pulumi knows where to find the Heartbeat chart.
    • The values object can be populated with any custom values you want to override the default ones provided by the Helm chart. In this example, we've left it empty, meaning we would deploy the Heartbeat Helm chart with its default configuration.
    • Lastly, we export the name and status of the deployed Helm chart as stack outputs. These outputs allow you to see the names and status of deployed resources when you run pulumi up.

    Run the Pulumi program by executing the following commands in your terminal within the directory where your Pulumi program is saved:

    pulumi up

    This will start the deployment process, and, after confirmation, Pulumi will apply the Helm chart to your Linode Kubernetes Cluster.

    Remember to replace placeholder values with actual ones appropriate for your setup. Keep your kubeconfig contents and other sensitive details secure and manage them according to best practices, possibly using secret management solutions.

    If you encounter any issues or have questions about configuring your Pulumi program, please visit the Pulumi Helm Chart documentation for more detailed information and examples.