Deploy the laravel-chart helm chart on Opensshift

Question

Pulumi · Accepted Answer

Deploying a Helm chart on an OpenShift cluster using Pulumi involves several steps. Helm charts are a convenient way to package and deploy applications on Kubernetes clusters, and OpenShift is a Kubernetes distribution that provides additional features and enhancements.

To achieve this, we'll use the `kubernetes.helm.v3.Chart` resource from the Pulumi Kubernetes provider, which allows us to deploy Helm charts on a Kubernetes cluster.

Below is a detailed explanation followed by a TypeScript program that demonstrates how to deploy the `laravel-chart` Helm chart on an OpenShift cluster:

1. **Setup Pulumi Kubernetes Provider**: We must configure the Kubernetes provider to connect to our OpenShift cluster. We typically pass the required kubeconfig file or use the default kubeconfig path.

2. **Deploy Helm Chart**: With the Pulumi Kubernetes provider configured, we'll use the `Chart` class from `@pulumi/kubernetes/helm/v3` to deploy the `laravel-chart`. We will need to specify the chart name, version (if desired), and any additional configurations required by the chart via the `values` property. If the chart is hosted in a custom Helm repository, we'll have to provide the repository URL as well.

Let's go ahead and write the Pulumi program to deploy the `laravel-chart`:

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

// Define the configuration for the Laravel chart. This should be modified according to your specific needs.
const laravelChartConfig = {
    // Replace with the namespace where you want to install your chart.
    namespace: "my-namespace", 
    // Replace with the actual chart name if different.
    chart: "laravel",
    // Specify the Helm chart repository containing the Laravel chart.
    repo: "my-helm-repo",
    // Set the chart version you want to deploy.
    version: "x.y.z",
    // Provide configuration values for the Helm chart.
    values: {
        // Your values go here. For example:
        service: {
            type: "ClusterIP"
        }
    },
};

// Deploy the Laravel Helm chart to the OpenShift cluster.
const laravelChart = new k8s.helm.v3.Chart("laravel", {
    namespace: laravelChartConfig.namespace,
    chart: laravelChartConfig.chart,
    version: laravelChartConfig.version,
    fetchOpts: {
        repo: laravelChartConfig.repo,
    },
    values: laravelChartConfig.values,
});

// Export the base URL for the Laravel application
export const laravelUrl = laravelChart.getResourceProperty("v1/Service", "laravel", "status").apply(status => {
    return status.loadBalancer?.ingress[0]?.hostname || status.loadBalancer?.ingress[0]?.ip;
});

```

In this code:

- We import the Kubernetes package from Pulumi.
- We define a configuration object, `laravelChartConfig`, that holds the settings for our Laravel chart, including the namespace, chart name, version, and any other values that are needed to configure the Laravel application.
- We create a new `Chart` object using the `k8s.helm.v3.Chart` class, passing in our `laravelChartConfig`.
- Lastly, we export the URL of the Laravel application, which can be used to access the Laravel service once it's deployed. We assume that the service will be exposed via a LoadBalancer; if your configuration differs (e.g., using Route on OpenShift), you would need to adjust the exported value accordingly.

Remember that before running this Pulumi program, you need to have access to an OpenShift cluster and have the `kubectl` configured to point to that OpenShift cluster. You may also need to adjust the Helm chart values and repository based on where your `laravel-chart` is hosted.

When you're ready to deploy, you execute the following commands with the Pulumi CLI:

```bash
pulumi up # To preview and deploy changes
pulumi stack output laravelUrl # To get the Laravel URL after deployment
```

This command will start the deployment process. Pulumi will show you a preview of the resources that will be created. If everything looks fine, you can proceed with the deployment. After the deployment is successful, you can use the `pulumi stack output laravelUrl` command to retrieve the URL where the Laravel application is accessible.