Deploy the mariadb-persistent helm chart on Linode Kubernetes Engine

Question

Pulumi · Accepted Answer

Deploying a Helm chart on a Kubernetes cluster is a common task when managing applications. If you want to deploy the mariadb-persistent Helm chart on Linode Kubernetes Engine (LKE), you'll need to do a few things:

Set up a Kubernetes cluster on Linode.
Install the Helm CLI on your local machine (or wherever you plan to run Pulumi from).
Write a Pulumi program that uses the kubernetes provider to install the Helm chart onto your Linode Kubernetes cluster.

Below, I’ll provide you with a Pulumi program written in TypeScript that accomplishes these tasks. This program assumes that you already have a Kubernetes cluster set up on Linode and that you’re authenticated with the cluster.

Explanation of the Pulumi Program

The @pulumi/kubernetes package is used to interact with Kubernetes resources. In this program, we'll use the Chart resource, which represents a Helm chart.
The chart property matches the name of the Helm chart you wish to deploy (mariadb-persistent in this case).
The version property specifies the version of the Helm chart you want to deploy. Here, we'll leave it unspecified, which means Helm will choose the latest version by default.
The values object allows you to configure the Helm chart. For mariadb-persistent, this would include database credentials, storage configurations, and other settings. For simplicity, we'll use the default options in this example.

To run this Pulumi program, you need to follow these steps:

Make sure the Pulumi CLI and Helm CLI are installed on your system.
Replace <YOUR_LINODE_CLUSTER_KUBECONFIG> with the path to your Kubeconfig file that allows you to access your Linode Kubernetes cluster.
Execute pulumi up to deploy the Helm chart to your cluster.

Here's the Pulumi TypeScript program to deploy the mariadb-persistent Helm chart:

import * as kubernetes from "@pulumi/kubernetes";

const kubeconfig = `<YOUR_LINODE_CLUSTER_KUBECONFIG>`;

const provider = new kubernetes.Provider("lke-k8s", {
    kubeconfig: kubeconfig,
});

const mariadbChart = new kubernetes.helm.v3.Chart("mariadb-persistent", {
    chart: "mariadb",
    fetchOpts:{
        repo: "https://charts.bitnami.com/bitnami",
    },
    // You can set custom values for the Helm chart as needed.
    values: {
        // Example of setting values: this would be specific to your needs.
        // rootUser: {
        //     password: "rootpassword",
        // },
        // db: {
        //     name: "my-database",
        //     user: "my-db-user",
        //     password: "my-db-password",
        // },
        // master: {
        //     persistence: {
        //         size: "8Gi",
        //     },
        // },
    },
}, { provider: provider });

export const chartName = mariadbChart.metadata.name;

Remember to replace the placeholders and configure the chart with your desired settings in the values section.

The above Pulumi program will install the MariaDB chart from the Bitnami repository into your Linode Kubernetes cluster using Helm. When executed, it will output the name of the deployed chart (chartName). You can customize the chart installation by providing different values in the values object. These values should match those that are available for configuration in the Helm chart's values.yaml file.