Deploy the de-elasticsearch helm chart on Opensshift

Question

Pulumi · Accepted Answer

To deploy the `de-elasticsearch` Helm chart on OpenShift, you'll use Pulumi's Kubernetes provider to instantiate the chart. Helm is a package manager for Kubernetes, allowing you to define, install, and upgrade applications packaged as Helm charts.

In this case, the `de-elasticsearch` chart is the package that contains all the necessary Kubernetes resources for Elasticsearch. Since we're deploying to OpenShift, which is a Kubernetes distribution, the process is similar to deploying to any Kubernetes cluster.

The main resource you'll use from Pulumi to accomplish this task is `Chart` from the `kubernetes` package. This Pulumi resource is designed to work with Helm charts by providing necessary details such as the chart name, version, repository, and values to customize the deployment.

Below is a TypeScript program that uses Pulumi to deploy the `de-elasticsearch` Helm chart to an OpenShift cluster. Once you've set up your Pulumi and Kubernetes/OpenShift environment and have the necessary access configured, you can run this program using Pulumi CLI.

Before diving into the code, make sure to install the required Pulumi package for Kubernetes if you haven't done so:

```bash
npm install @pulumi/kubernetes
```

Now, let's have a look at the Pulumi program that performs this deployment:

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

// The name of the Helm chart you want to deploy, in this case, 'de-elasticsearch'.
const chartName = "de-elasticsearch";

// If the chart is part of a Helm repository, specify the repository URL. Adjust if there's a different URL.
const chartRepo = "https://charts.example.com/";

// If the chart requires specific version or any specific values, define them below.
const chartVersion = "1.0.0"; // Adjust the chart version as needed.
const chartValues = {
  // Specify any values needed to customize your Elasticsearch deployment.
  // This is an example value structure that you would replace with actual configuration for your usage.
  clusterName: "elasticsearch-cluster",
  nodeCount: 3,
  // Other configuration values go here...
};

// Instantiate the Helm chart.
const elasticsearchChart = new kubernetes.helm.v3.Chart(chartName, {
  chart: chartName,
  version: chartVersion,
  fetchOpts: {
    repo: chartRepo,
  },
  values: chartValues,
  // In a real-world scenario, you might need to specify the OpenShift namespace where this chart should be deployed.
  // namespace: "my-namespace",
});

// Optional: Export the status URL of the application if it's exposed by the Helm chart.
export const statusUrl = elasticsearchChart.getResourceProperty("v1/Service", "elasticsearch-service", "status.loadBalancer.ingress[0].hostname");

```

To explain the main parts of the program:

- We start by importing the `@pulumi/kubernetes` package to interact with Kubernetes resources.
- We declare some constants to hold the details of the Helm chart we're deploying (`chartName`, `chartRepo`, and `chartVersion`).
- We create a `Chart` resource, which Pulumi uses to deploy Helm charts to Kubernetes. We provide it with the necessary configurations such as the name, version, repository, values for customization, and the namespace (if needed).

When you run this program with the Pulumi CLI, it will perform the deployment of the `de-elasticsearch` Helm chart onto your configured OpenShift cluster.

If you need any further explanation or have more questions as you get started with Pulumi on OpenShift, please let me know!