Deploy the geomapfish helm chart on Opensshift

Question

Pulumi · Accepted Answer

In order to deploy the GeoMapFish Helm chart on an OpenShift cluster using Pulumi, we will use the `kubernetes.helm.v3.Chart` resource from the `@pulumi/kubernetes` plugin. This resource allows you to deploy a Helm chart into a Kubernetes cluster, which in this case will be an OpenShift cluster. To communicate with the OpenShift cluster, you will need to have `kubectl` configured appropriately with cluster access.

Here's a step-by-step explanation of what the Pulumi program will do:

1. **Configuration of Pulumi**: We begin by configuring Pulumi to use the Kubernetes provider. This is automatically picked up from your `kubectl` configuration.

2. **Helm Chart Deployment**: The program will then use a Helm Chart to deploy GeoMapFish onto your OpenShift cluster. For Helm charts, Pulumi provides the `Chart` resource, which encapsulates a Helm chart's deployment logic. You need to specify the chart name, version, and any configuration values that the chart accepts.

3. **Exporting endpoint**: After the deployment, we will export any relevant endpoints or information that you might need to access the deployed application.

Below you will find the TypeScript program that performs the deployment. Be sure to have the Pulumi CLI installed and your kubeconfig file pointing to your OpenShift cluster.

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

// Create a Kubernetes provider instance that uses our existing kubeconfig
const provider = new k8s.Provider("openshift-provider", {
    kubeconfig: process.env.KUBECONFIG, // Make sure this environment variable is set
});

// Deploy GeoMapFish Helm chart into the OpenShift cluster
const geoMapFishChart = new k8s.helm.v3.Chart("geomapfish", {
    // Replace with the correct repo and chart name if different
    repo: "geomapfish-repo",
    chart: "geomapfish",
    version: "3.0", // Use the helm chart version you intend to deploy
    // This example assumes the Helm chart accepts 'values' for configuration.
    // These values would be specific to the GeoMapFish Helm chart you are using.
    values: {
        // ... include any required chart values here
    },
}, { provider });

// Export any relevant data here, e.g., service endpoint to access GeoMapFish
export const geoMapFishEndpoint = geoMapFishChart.getResourceProperty(
    "v1/Service", "geomapfish-service-name", "status"
).apply(status => status.loadBalancer.ingress[0].hostname);

```
To run this Pulumi program:

1. Save the above code in a file named `index.ts`.
2. Run `npm install` to install the required dependencies.
3. Run `pulumi up` to start the deployment. This will show you a preview of what Pulumi plans to do. If everything looks good, you confirm and Pulumi will perform the deployment.

Please remember to replace the placeholders for the Helm chart repository and chart name with the correct ones for GeoMapFish. Also, you'll need to fill in the `values` property with the specific configurations required by the GeoMapFish Helm chart.

This program assumes you're installing the chart with default settings - you may need to customize the `values` to suit your deployment needs or to configure OpenShift-specific settings.

Keep in mind that working with Helm charts generally involves ensuring the Helm CLI tool has the correct repositories added and up-to-date, although Pulumi's Helm support does this behind the scenes.

Additionally, if your OpenShift clusters require additional authentication configurations or if you need to use a specific context from your kubeconfig, ensure that you modify the provider configuration accordingly.