Deploy the old-joomla helm chart on Kubernetes

Question

Pulumi · Accepted Answer

### Deploying the old-joomla Helm Chart on Kubernetes with Pulumi

Helm Charts provide a way to deploy and manage applications on a Kubernetes cluster. With Pulumi, you can orchestrate the deployment of Helm charts programmatically. We'll use Pulumi's Kubernetes provider to deploy the "old-joomla" Helm chart, which is a package that encapsulates the Joomla application, its dependencies, and its deployment configuration.

We will go through the process of setting up a Pulumi program in TypeScript that accomplishes this. The program will:

1. Set up a Kubernetes Provider that interacts with your cluster.
2. Use the `Chart` resource from the Pulumi Kubernetes provider to deploy the "old-joomla" Helm chart.

Before you start, make sure you have the following prerequisites in place:
- Pulumi CLI installed and configured with your chosen cloud provider.
- Access to a Kubernetes cluster (with `kubectl` configured to connect to it).
- Helm tool installed (used to locate the "old-joomla" chart's repository or for local chart paths).

Here is the TypeScript program that deploys the "old-joomla" Helm chart to your Kubernetes cluster:

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

const chartName = "old-joomla";
const chartVersion = "x.y.z";  // Replace x.y.z with the chart's version you wish to deploy
const chartRepo = "https://charts.bitnami.com/bitnami"; // Replace with the repository URL where the chart is hosted

// Deploying the old-joomla Helm chart to the Kubernetes cluster
const joomlaChart = new k8s.helm.v3.Chart("old-joomla-chart", {
    chart: chartName,
    version: chartVersion,
    fetchOpts: {
        repo: chartRepo
    },
    // Specify the values you'd like to override.
    // This would be equivalent to the --set flag when using the Helm CLI.
    values: {
        // Add custom values here which are specific to the old-joomla chart
        // e.g., cpu: "100m"
    }
});

export const joomlaChartName = joomlaChart.metadata.name;
```

In this program:

- We import the Kubernetes package from Pulumi which allows us to interact with our cluster.
- We declare constants for the name, version, and repository URL of the chart we're deploying. You must replace "x.y.z" with the actual version of the "old-joomla" chart you want to deploy.
- The `k8s.helm.v3.Chart` class is instantiated to create a new Helm chart resource. The chart's name, version, and repository options are provided to locate the correct Helm chart.
- Within the `values` object of the chart, you can provide overrides for default Helm chart values. This step is optional and depends on the configuration you would like for Joomla.
- We export the name of the deployed Helm chart to use as a reference if needed.

To deploy this program:
1. Save the code to a file with a `.ts` extension, for example, `deployJoomla.ts`.
2. Run `pulumi up` in the same directory as your `.ts` file. Pulumi CLI will interact with your Kubernetes cluster to deploy the chart.

After you run `pulumi up`, Pulumi performs the deployment, and you should see outputs indicating the status of the resources being deployed. If you've set everything up correctly, "old-joomla" should be deployed to your Kubernetes cluster.

Remember to replace the `chartVersion` and `chartRepo` with actual versions and repository URLs. You can find the "old-joomla" Helm chart info and available versions from Helm chart repositories or artifact hubs that host Helm charts.