Deploy the kube-wordpress-mysql helm chart on Rancher

Question

Pulumi · Accepted Answer

Deploying a Helm chart on Rancher involves creating or using a Kubernetes cluster managed by Rancher, installing Rancher's Helm chart management resources, and then deploying the Helm chart itself.

Below is a Pulumi program in TypeScript that shows how to deploy a Helm chart for a WordPress site with a MySQL backend into a Kubernetes cluster that is managed by Rancher. This script would need the rancher2 package to interact with Rancher's resources.

The program roughly follows these steps:

Configure the Rancher2 provider to connect with your Rancher server.
Define a Kubernetes Cluster where WordPress will be deployed (or use an existing one).
Create a namespace for the WordPress deployment in the Kubernetes Cluster.
Deploy the WordPress Helm chart into the cluster.

Here is the Pulumi program that accomplishes this:

import * as pulumi from "@pulumi/pulumi";
import * as rancher2 from "@pulumi/rancher2";
import * as kubernetes from "@pulumi/kubernetes";

// Assuming you've already created a Rancher Kubernetes Cluster and have the kubeconfig ready.
// Replace the 'kubeconfig' value with your actual kubeconfig.
const kubeconfig = "<YOUR_KUBECONFIG_HERE>";

// Set up the Rancher2 provider
const rancherProvider = new rancher2.Provider("my-rancher", {
    api_url: "https://<RANCHER_API_URL>",
    accessKey: "<YOUR_ACCESS_KEY>",
    secretKey: "<YOUR_SECRET_KEY>",
});

// Set up a Kubernetes provider instance with the kubeconfig from Rancher
const k8sProvider = new kubernetes.Provider("my-k8s-provider", {
    kubeconfig: kubeconfig,
});

// Create a Kubernetes Namespace for WordPress
const wordpressNamespace = new kubernetes.core.v1.Namespace("wordpress-namespace", {
    metadata: { name: "wordpress" },
}, { provider: k8sProvider });

// Deploy the WordPress Helm chart using the Helm provider
const wordpressHelmRelease = new kubernetes.helm.v3.Release("wordpress", {
    chart: "wordpress",
    version: "9.0.3", // Use the version of the chart that is compatible with your setup
    namespace: wordpressNamespace.metadata.name,
    repositoryOpts: {
        repo: "https://charts.bitnami.com/bitnami",
    },
    values: {
        mariadb: {
            auth: {
                rootPassword: "your-root-password", // You should use a secure password
                // Add other database configurations here
            },
        },
        // Add other WordPress configurations here
    },
}, { provider: k8sProvider });

// Export the endpoint of WordPress
export const wordpressEndpoint = wordpressHelmRelease.status.apply(status => status.loadBalancer.ingress[0].ip);

To use this program:

You need to replace placeholder values like <YOUR_ACCESS_KEY>, <YOUR_SECRET_KEY>, <RANCHER_API_URL>, and <YOUR_KUBECONFIG_HERE> with actual values corresponding to your Rancher installation.
You might need to customize the values object in the wordpressHelmRelease definition according to your desired WordPress and MySQL configurations.
Install the required Pulumi packages using npm or yarn.
Execute the Pulumi program with pulumi up command, which will start the deployment process.

Ensure that you have the correct permissions and that your Pulumi CLI is logged in to the desired state backend. Additionally, you must have access to the kubeconfig file for the Kubernetes cluster managed by Rancher to deploy resources in it effectively.

After successful deployment, the wordpressEndpoint will give you the LoadBalancer IP for accessing the WordPress site. If you're running this in an environment that doesn't provide a LoadBalancer IP (like on-premises without MetalLB or similar), you'll need an alternative method to expose your service, such as NodePort or Ingress.

Please make sure to review and test the program thoroughly in a development environment before using it in production, and always follow security best practices for sensitive data like API keys and passwords.