1. Deploy the postgresql-persistent helm chart on Linode Kubernetes Engine


    To deploy the postgresql-persistent Helm chart on Linode Kubernetes Engine using Pulumi, we will follow these steps:

    1. Set up the Pulumi environment for TypeScript.
    2. Install the required Pulumi packages for working with Kubernetes resources.
    3. Write a TypeScript program that uses Pulumi's Kubernetes provider to deploy the postgresql-persistent Helm chart on a Kubernetes cluster hosted on Linode.

    Setting up the Pulumi environment for TypeScript:

    Make sure to have Node.js and npm installed on your machine, as they are required to write and run Pulumi programs in TypeScript. You will also need to install the Pulumi CLI and set up your Linode access credentials for Kubernetes.

    Install the required Pulumi packages:

    You will need to add the Kubernetes package for Pulumi. This can be done using npm in the same directory as your Pulumi program:

    npm install @pulumi/kubernetes

    Writing the TypeScript Program:

    The program below creates an instance of helm.sh/v3.Chart to deploy the postgresql-persistent Helm chart. Before running this program, ensure you have configured your Linode API access in Pulumi and have a Kubernetes cluster available in Linode.

    import * as k8s from "@pulumi/kubernetes"; // Create an instance of the k8s Provider pointing to the Linode Kubernetes Engine cluster const linodeK8sProvider = new k8s.Provider("linodeK8sProvider", { kubeconfig: "<YOUR_KUBECONFIG_CONTENTS>", // Replace with your actual kubeconfig contents }); // Deploy the postgresql-persistent Helm chart using the helm.v3.Chart class const postgresqlPersistentChart = new k8s.helm.v3.Chart("postgresql-persistent", { chart: "postgresql", version: "<HELM_CHART_VERSION>", // Specify the chart version you want to deploy fetchOpts: { repo: "https://charts.bitnami.com/bitnami", // Replace with the repository where the chart is located }, values: { // Specify the values for the chart here // These are PostgreSQL specific configurations that you can customize persistence: { enabled: true, size: "8Gi", // Example: Allocate 8Gi of persistent storage }, postgresqlUsername: "pulumi_user", postgresqlPassword: "pulumi_password", postgresqlDatabase: "pulumi_db", }, }, { provider: linodeK8sProvider }); // Export the cluster IP and port of the PostgreSQL service export const postgresServiceClusterIP = postgresqlPersistentChart.getResourceProperty('v1/Service', 'postgresql-persistent', 'spec').clusterIP; export const postgresServicePort = postgresqlPersistentChart.getResourceProperty('v1/Service', 'postgresql-persistent', 'spec').ports[0].port;


    • We import the @pulumi/kubernetes library to work with Kubernetes resources in Pulumi.
    • The linodeK8sProvider is an instance of Pulumi's Kubernetes Provider, which will allow us to communicate with our Linode Kubernetes cluster. You will need to replace <YOUR_KUBECONFIG_CONTENTS> with the actual kubeconfig content that Linode provides for your Kubernetes cluster.
    • We create a new Helm chart resource named postgresql-persistent by instantiating k8s.helm.v3.Chart. We specify the chart name as postgresql, the version you wish to deploy, and the repository where the chart is located.
    • We provide a set of values that are passed to the Helm chart to configure the PostgreSQL deployment. This includes enabling persistence and setting the necessary credentials and database names. Update these to suit your requirements or use Pulumi's config system to inject them from the environment or a config file.
    • Finally, we export the PostgreSQL service's cluster IP and port so that they can be used to connect to the PostgreSQL instance from within the cluster network.

    To run this program, you would follow the standard Pulumi workflow:

    • Initialize a new Pulumi project.
    • Place the TypeScript code into the index.ts file in your Pulumi project.
    • Run pulumi up to preview and deploy the changes.

    This Pulumi program provides all the necessary steps to deploy a postgresql-persistent Helm chart to Linode Kubernetes Engine, managing infrastructure as code efficiently and reproducibly.