1. Deploy the cert-manager-setup helm chart on Linode Kubernetes Engine


    Deploying the cert-manager-setup Helm chart on a Linode Kubernetes Engine (LKE) cluster is a process that involves using Pulumi's Kubernetes provider to interact with a Kubernetes cluster hosted on Linode. The first step is to establish communication with the LKE cluster. You can use the kubeconfig file provided by Linode to configure Pulumi to connect to your LKE cluster.

    Afterwards, you will use the kubernetes.helm.v3.Chart class from Pulumi's Kubernetes provider to deploy the cert-manager-setup Helm chart. This class acts as a resource which represents a Helm chart in a Pulumi program.

    Here's a Pulumi TypeScript program that will deploy the cert-manager-setup Helm chart on an LKE cluster:

    1. Import the necessary packages and initialize resources.
    2. Create a new instance of Chart representing the Helm chart you want to deploy.
    3. Set up the necessary Helm values, which may include information specific to cert-manager.
    4. Perform the deployment.

    Below is the actual TypeScript code you can use:

    import * as k8s from "@pulumi/kubernetes"; // Assume that the KUBECONFIG environment variable has been set to point to the correct kubeconfig file. // This approach is typical in a CI/CD pipeline where the environment variables can be securely set. // Alternatively, the kubeconfig can also be specified directly in the code if needed. // Deploy the cert-manager-setup Helm chart on the Linode Kubernetes Engine cluster. const certManagerChart = new k8s.helm.v3.Chart("cert-manager-setup", { // Specify the Helm chart repository and chart name. chart: "cert-manager", version: "1.7.1", // Replace with the desired chart version. fetchOpts: { // Replace 'https://charts.jetstack.io' with the actual Helm repository URL for cert-manager. repo: "https://charts.jetstack.io", }, // The namespace where cert-manager will be installed. namespace: "cert-manager", // Values to override default chart values (these are example values) values: { installCRDs: true, // Set to true to install CRDs. // Add additional custom values as necessary. }, }); // Export the resources' names, which will be displayed in the Pulumi output. export const chartName = certManagerChart.metadata.name;

    This Pulumi program does the following:

    • It begins by importing the Pulumi Kubernetes package which allows you to interact with Kubernetes resources.
    • It then defines a new Helm chart resource using Pulumi's Kubernetes provider, representing the cert-manager chart.
    • In the Chart resource arguments:
      • chart: Specifies the name of the chart, cert-manager.
      • version: Refers to the specific version of the chart you wish to deploy. It's generally recommended to pin to a specific version for consistency and repeatable deployments.
      • fetchOpts.repo: It's the URL of the Helm repository where the cert-manager chart is stored.
      • namespace: The namespace in Kubernetes where cert-manager should be installed. If the namespace doesn't exist, Helm will create it.
      • values: Allows you to specify any custom values you want to override in the Helm chart. Here, the installCRDs option is set to true to ensure that the cert-manager CRDs are installed by the chart.

    After applying this Pulumi program with pulumi up, it will initiate the deployment of the cert-manager Helm chart onto your LKE cluster with the configuration as specified.

    Please replace the version with the specific version of the cert-manager you wish to use. The repo field should be replaced with the actual repository URL hosting the cert-manager-setup chart if it differs.

    Keep in mind that once the cert-manager is installed, you may need additional steps to configure its usage in your cluster such as setting up Issuers and Certificate resources to manage TLS certificates for your applications.