Deploy the dmaap-listener helm chart on Kubernetes

Question

Pulumi · Accepted Answer

To deploy a Helm chart on Kubernetes using Pulumi, you can utilize the Chart resource from the @pulumi/kubernetes package. This resource allows you to specify a Helm chart, along with any configurations required, and deploy it to a Kubernetes cluster.

In our case, we'll be deploying a Helm chart named "dmaap-listener". You'll need to have your Kubernetes cluster configured for this deployment to work. Ensure you have kubectl access to the target cluster and that Pulumi is configured to use the corresponding Kubernetes context.

Here's a detailed step-by-step process on how to deploy the "dmaap-listener" Helm chart to your Kubernetes cluster using TypeScript:

Step 1: Set up Pulumi project and install dependencies

If you haven't already, start by creating a new Pulumi project. You will also need to install the necessary Node.js package for Kubernetes:

$ pulumi new typescript

Next, install the @pulumi/kubernetes package:

$ npm install @pulumi/kubernetes

Step 2: Write the Pulumi program

Create a file named index.ts in your Pulumi project and include the Chart resource like so:

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

// Replace <your-cluster-name> with the actual name of your Kubernetes cluster
const clusterName = "<your-cluster-name>";

// Define the dmaap-listener Helm chart deployment using pulumi/kubernetes' Chart class.
const dmaapListenerChart = new k8s.helm.v3.Chart("dmaap-listener", {
    chart: "dmaap-listener", // The name of the helm chart you want to deploy
    // If your Helm chart is in a custom repository you will need to specify it along with the version.
    // repo: "your_helm_chart_repository",
    // version: "your_chart_version",
    // values: {
    //   key: "value", // Any values you need to pass into the Helm chart for configuration.
    // },
    namespace: "default", // The namespace where you want to deploy the chart, default can be replaced if needed.
}, { dependsOn: [clusterName] }); // Add dependencies if your chart needs to wait for another resource to be created.

// Export the necessary details if needed, such as the service endpoint.
export const dmaapListenerEndpoint = dmaapListenerChart.getResourceProperty("v1/Service", "dmaap-listener", "status");

This program defines a Helm chart release named "dmaap-listener" deploying the chart found at the specified repository. If the Helm chart "dmaap-listener" is not part of the default Helm repo, you must specify the repo property with the URL of the Helm repository containing your chart. You can also specify particular versions and configuration values for the chart by using the version and values properties, respectively.

Step 3: Deploy with Pulumi

Finally, you run pulumi up to start the deployment. Pulumi will print the planned changes and prompt you to confirm them before proceeding.

Step 4: Check the deployment

You can confirm the deployment by checking the services in the namespace where you deployed the Helm chart:

$ kubectl get services -n default

Look for the "dmaap-listener" service and note the IP or DNS name provided.

Conclusion

Deploying a Helm chart on a Kubernetes cluster with Pulumi is a straightforward process that combines the declarative nature of Kubernetes with the ease of use of Pulumi's infrastructure as code capabilities. The above program provides a template, but remember to customize the namespace, repository, chart version, and values according to your specific Helm chart requirements.