Deploy the elasticsearch-chart helm chart on Opensshift

Question

Pulumi · Accepted Answer

To deploy the `elasticsearch-chart` Helm chart on OpenShift using Pulumi, you would typically follow these steps:

1. **Set up your Pulumi environment**: Ensure that your Pulumi CLI is configured with appropriate access to your OpenShift cluster. This would typically mean having your `kubeconfig` file set up and accessible by Pulumi.

2. **Install the Pulumi Kubernetes package**: We'll use the `@pulumi/kubernetes` package which allows Pulumi to interact with Kubernetes resources, including deploying Helm charts.

3. **Write the Pulumi code**: We'll use the Kubernetes provider to deploy the `elasticsearch-chart` Helm chart into an OpenShift cluster. You should have the Helm chart details like its repository URL, any custom values you'd like to apply, and the namespace in which the chart should be installed.

4. **Deploy using Pulumi**: Run `pulumi up` to execute your code and deploy the Helm chart.

Below is a TypeScript program demonstrating how you would use Pulumi to deploy the `elasticsearch-chart` on OpenShift:

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

// Step 1: Create a Kubernetes Provider to interact with the OpenShift cluster.
// The provider uses the `kubeconfig` from your environment by default.
const provider = new kubernetes.Provider("openshift", {
    // You can explicitly specify `kubeconfig` if required.
});

// Step 2: Define the Helm Chart resource.
const elasticsearchChart = new kubernetes.helm.v3.Chart("elasticsearch-chart", {
    // Replace with Elasticsearch chart repository URL and any other chart details
    // Ensure you specify the correct chart name and version.
    repo: "bitnami",
    chart: "elasticsearch",
    version: "latest",
    // Provide namespace if you want to deploy it in a specific OpenShift project.
    namespace: "elasticsearch-namespace",
    // Optional: specify custom values for the Helm chart.
    values: {
        // Assuming this is the structure of values you'd want to customize.
        // You will need to refer to the specific chart's `values.yaml` to get the correct structure.
        cluster: {
            name: "elasticsearch-cluster",
            size: 3, // example to set the number of nodes in the cluster
        },
        // ... any other custom values.
    },
}, { provider });

// Step 3: Export the relevant data needed to interact with your deployment.
export const elasticsearchEndpoint = elasticsearchChart.getResourceProperty("v1/Service", "elasticsearch-chart-elasticsearch", "status").apply(status => status.loadBalancer.ingress[0].ip);
```

In this program:

- We start by importing the necessary modules from Pulumi to interact with Kubernetes.
- We create a Kubernetes provider to interact with your OpenShift cluster. By default, Pulumi will use your current `kubeconfig` settings. You can also specify it explicitly if needed.
- Next, we use the `kubernetes.helm.v3.Chart` class to declare the deployment of the Elasticsearch Helm chart. Be sure to replace the `repo`, `chart`, `version`, and other values placeholders with actual information from the Elasticsearch chart you want to deploy.
- If you have custom configurations for your Elasticsearch chart, you can specify them in the `values` field.
- We export the Elasticsearch service endpoint to easily access your Elasticsearch cluster after it is deployed. This assumes the service is of type `LoadBalancer`; if it uses different type (like `ClusterIP` or `NodePort`), modify the property you read accordingly.
- To get the Helm chart to deploy, you might need to adjust the `values` field to match the customizations required for your use case.

After writing this code in a file (for example, `index.ts`), you can deploy it by running the following Pulumi commands:

```bash
# To install dependencies
npm install

# Login into the Pulumi service
pulumi login

# Create a new Pulumi stack, which is an isolated deployment target for this instance of your project
pulumi stack init dev

# Preview the deployment plan
pulumi preview

# Deploy the Helm chart to your OpenShift cluster
pulumi up
```

Please ensure you are logged into the correct OpenShift cluster (using `oc login` or by setting the right context in `kubeconfig`) before running the Pulumi commands.