Deploy the wordpress-nginx helm chart on Opensshift

Question

Pulumi · Accepted Answer

To deploy the `wordpress-nginx` Helm chart on OpenShift using Pulumi, you'll need to utilize Pulumi's Kubernetes provider. This provider allows you to write code in TypeScript (among other languages) to interact with Kubernetes resources, including those defined by Helm charts.

Here's an overview of the process:
1. We'll create a new Pulumi project and set up the necessary Pulumi packages.
2. We'll create a new instance of a Kubernetes provider configured for your OpenShift cluster.
3. With the Kubernetes provider, we'll use the `helm.v3.Chart` class to deploy the `wordpress-nginx` Helm chart.
4. We'll provide configuration values required by the Helm chart, such as release name and namespace.

Below is a Pulumi program in TypeScript that demonstrates these steps. Before you run this code, ensure you have Pulumi CLI installed and configured for your OpenShift cluster.

```typescript
import * as k8s from '@pulumi/kubernetes';

// Create an instance of the Kubernetes provider configured for OpenShift
const openshiftProvider = new k8s.Provider('openshiftProvider', {
    // Assuming `kubeconfig` is available in your environment or you have configured the context for OpenShift
    // If needed, you can explicitly pass `kubeconfig` file path as an option
});

// Information for the Helm chart you want to install
const chartName = 'wordpress-nginx';
const releaseName = 'my-wordpress';
const namespace = 'default'; // Specify the namespace where you want to deploy the chart

// Deploying the wordpress-nginx Helm chart
const wordpressNginxChart = new k8s.helm.v3.Chart(releaseName, {
    chart: chartName,
    // Define where to find the Helm chart.
    // The `repo` option specifies a Helm chart repository, it can be the URL or the name of the Helm repo.
    // If your Helm chart is in a private repository, you may need to include additional authentication details.
    // You might need to add the repository using `helm repo add` if it isn't configured in your Helm settings.
    fetchOpts: {
        repo: 'https://charts.bitnami.com/bitnami', // Replace this with the correct repository if different
    },
    namespace: namespace,
    // Specify any custom values for the chart.
    // Below is an example which you would modify based on your Chart requirements or OpenShift specifics.
    values: {
        // Example of potential configurable values
        // mysqlDatabase: 'wordpress_db',
        // mysqlUser: 'wordpress_user',
        // ...additional chart configuration...
    },
}, { provider: openshiftProvider });

// Export the URL by querying the LoadBalancer service (if exposed) after the deployment
// Note: This step may vary in your chart or deployment. If a LoadBalancer isn't used, you may want
// to use another type of service like ClusterIP or NodePort to expose your application.
export const wordpressUrl = wordpressNginxChart.getResourceProperty('v1/Service', 'my-wordpress-wordpress', 'status').apply(status => {
    return status.loadBalancer.ingress[0].ip;
});

```

In this program:
- We import the `@pulumi/kubernetes` package which contains the Pulumi Kubernetes SDK.
- We initialize a provider for Kubernetes. This example assumes that you have configured kubectl to point to your OpenShift cluster, hence no explicit kubeconfig is passed. If you have a kubeconfig file you want to use, you can include it in the provider options.
- We create a new Helm chart resource using `k8s.helm.v3.Chart`. This is where you specify the chart name, the repository details, the namespace for deployment, and any additional values that your chart requires.
- Finally, we attempt to export a URL. This step is highly dependent on the service type your Helm chart creates. If your WordPress instance is served behind a `LoadBalancer`, you can export the external IP. Otherwise, for `ClusterIP` or `NodePort`, you may export a different set of properties to access your WordPress instance.

After writing this program, you would run it using the Pulumi CLI. First, you would use `pulumi up` to preview and then apply the changes. Once applied, this will deploy the `wordpress-nginx` Helm chart to your OpenShift cluster.

To remove the deployment later, you would use `pulumi destroy`.

This program is a starting point; you'll want to further customize it, especially the Helm chart values, to match your exact deployment requirements. The `values` parameter in the `Chart` resource can be used for this purpose, where you can provide all necessary configuration that your WordPress Helm chart needs.