Deploy the teleport-plugin-event-handler helm chart on Kubernetes

Question

Pulumi · Accepted Answer

To accomplish the deployment of the Helm chart `teleport-plugin-event-handler` on a Kubernetes cluster using Pulumi, we will write a Pulumi program in TypeScript.

The Pulumi program will use the `kubernetes` package which provides a way to deploy applications using Helm charts. In this context, a Helm chart is a package that contains all the necessary configurations to deploy an application or service onto a Kubernetes cluster. The `teleport-plugin-event-handler` Helm chart would be one such package.

The key resources from the Pulumi Kubernetes provider we'll use for this deployment are as follows:

- `Chart`: The `Chart` resource from `kubernetes.helm.sh/v3` is used to deploy a Helm chart. In the program, we will specify the chart name, version (if required), and any custom values we want to override in the default chart configuration.

Here's the Pulumi TypeScript program to deploy the `teleport-plugin-event-handler` Helm chart:

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

// Create a Kubernetes namespace for the teleport-plugin-event-handler deployment
const ns = new k8s.core.v1.Namespace("teleport-plugin-event-handler-ns", {
    metadata: {
        // Your desired namespace name
        name: "teleport-plugin-event-handler",
    },
});

// Deploy the teleport-plugin-event-handler Helm chart
const teleportPluginEventHandlerChart = new k8s.helm.v3.Chart("teleport-plugin-event-handler", {
    chart: "teleport-plugin-event-handler",
    // Replace with the appropriate repository if the chart is not in the default Helm repo
    fetchOpts: {
        repo: "http://charts.example.com/", // Placeholder repository URL
    },
    // Specify the namespace to install the chart into
    namespace: ns.metadata.name,
    // If required, provide custom values by specifying the 'values' property
    values: {
        // Custom values to override the defaults set by the chart
    },
    // Optional: specify the Helm chart version you want to deploy
    version: "1.2.3", // Replace with the chart version you need
}, { provider: provider });

// Export the namespace name
export const namespaceName = ns.metadata.name;

// Output the status of the Helm deployment
export const deploymentStatus = teleportPluginEventHandlerChart.status;
```

In this program:

- We first create a dedicated Kubernetes namespace for our `teleport-plugin-event-handler`, making the release easier to manage and isolate.
- Next, we declare the Helm `Chart` resource, specifying the name of the Helm chart and the repository URL (which you will need to replace with the actual URL where the chart is hosted).
- We also mention that we want to deploy this chart into the newly-created namespace.
- Optionally, you can provide overrides for chart values through the `values` property. This is where you can specify custom configurations for your chart. Since configurations vary significantly from one chart to another, please refer to the chart's documentation for the correct values.
- The version is specified for the chart to pin the application to a specific version, ensuring consistent deployments across different environments.

To run the above Pulumi program:

1. You would need to have the Pulumi CLI and Node.js installed.
2. Have auth login configuration done for the Kubernetes cluster you're targeting.
3. Create a new directory for your Pulumi project.
4. Initialize a new Pulumi project in your chosen programming language (TypeScript in this case).
5. Install the required Pulumi package for Kubernetes using npm:

```shell
npm install @pulumi/kubernetes
```

6. Create a new TypeScript file in your project directory, copy the above code, and revise the chart repository URL and any custom values as needed.
7. Run the Pulumi program using the following commands:

```shell
pulumi up # This command creates and deploys the declared resources onto your Kubernetes cluster.
```

Pulumi will present you with a summary of the planned changes before it creates and deploys any resources. Review these details and then confirm the deployment.

After the deployment is complete, you can inspect the resources and see the status of your deployment through the Pulumi stack outputs. If you had any `export` statements in your Pulumi code, the corresponding values would be displayed in the terminal – in our case, the namespace name and the deployment status.

For detailed documentation on the `Chart` resource and the Pulumi Kubernetes provider, please refer to the [Pulumi Kubernetes provider](https://www.pulumi.com/docs/reference/pkg/kubernetes/helm/v3/chart/).