Deploy the Wordpress helm chart on Kubernetes

Question

Pulumi · Accepted Answer

Deploying a WordPress Helm chart on Kubernetes using Pulumi involves several steps. Here's a guide to understanding what the program does:

1. **Set Up the Kubernetes Cluster:** The program assumes you have a Kubernetes cluster up and running. If not, you would have to first provision one using Pulumi.

2. **Import Necessary Packages:** We import the required Pulumi and Kubernetes packages to interact with the Kubernetes cluster and deploy the Helm chart.

3. **Create a Helm Chart Resource:** With Pulumi's Kubernetes provider, we can create a Helm Chart resource that represents the WordPress chart. In the properties, you can modify values like the chart version, values overrides (via the `values` property), and the namespace where it should be deployed.

4. **Provision the Helm Chart:** When the Pulumi program runs, it will contact the Helm repository, pull the specified chart (with any custom values provided), and apply it to your Kubernetes cluster.

Here is the TypeScript code for deploying a WordPress Helm chart with Pulumi:

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

// This code assumes that you've already configured Pulumi with a Kubernetes cluster context.
// No need to explicitly setup kubeconfig as Pulumi uses the current context from .kube/config
// by default. You can provide a custom kubeconfig or context if necessary.

const wordpressChart = new kubernetes.helm.v3.Chart("wp-kubernetes", {
    // Replace with the namespace where you want to deploy WordPress
    namespace: "default", 
    chart: "wordpress",
    fetchOpts: {
        repo: "https://charts.bitnami.com/bitnami",
    },
    values: {
        // You can set chart values here, for example:
        // service: {
        //   type: "LoadBalancer",
        // },
    },
    // if you need a specific version of the chart, uncomment and specify the version here
    // version: "9.0.3", 
});

// Export the public Service endpoint to access Wordpress
export const frontendIp = wordpressChart.getResourceProperty("v1/Service", "wp-kubernetes-wordpress", "status");
```

In the code above:

- We create a `Chart` resource from the `@pulumi/kubernetes` package.
- We direct Pulumi to install the WordPress chart from the Bitnami Helm repository.
- We set the namespace as `default`.
- The `values` object is currently commented out, but one could uncomment it and specify any overrides required.

To understand the outcome of this deployment and access the WordPress application, we export the endpoint, which will provide us with the load balancer IP once the service is up and reachable.

Keep in mind that if your cluster is on a cloud provider, you'll need to ensure the necessary cloud provider permissions and configurations are set. For example, if you are deploying to a cloud-managed Kubernetes service like Amazon EKS or Google GKE, make sure the compute resources and load balancers can be provisioned.

After you run the program using Pulumi CLI (`pulumi up`), Pulumi will show you a preview of the resources that will be created. Upon confirmation, it will deploy WordPress to the Kubernetes cluster using the Helm chart.