Deploy the jh-gitlab helm chart on Opensshift

Deploying GitLab Helm Chart on OpenShift

Deploying a Helm chart on a Kubernetes cluster, including OpenShift, can be done with the Pulumi Kubernetes provider. OpenShift is essentially a Kubernetes distribution, so Kubernetes resources and Helm charts can be applied directly. To do this, we will use the kubernetes.helm.v3.Chart resource, which represents a Helm chart installation.

Here's a step-by-step rundown of deploying the jh-gitlab Helm chart on OpenShift using Pulumi:

Prerequisites: Ensure you have the following installed and set up:
- Pulumi CLI.
- Access to an OpenShift cluster.
- kubectl configured to communicate with your OpenShift cluster.
- Helm CLI (optional, but useful for comparison or troubleshooting).
Pulumi Stack: A Pulumi stack represents an isolated, independently configurable instance of your Pulumi program. Each stack corresponds to a distinct environment (development, staging, production, etc.). Ensure you have a Pulumi stack initialized for your project.
Kubernetes Provider Configuration: Pulumi uses the Kubernetes provider to interact with Kubernetes clusters. The provider needs to be configured with credentials to access the OpenShift cluster.
Helm Chart: The Helm chart for GitLab, which we refer to as jh-gitlab, will be defined as a Pulumi resource. We assume the chart is available in a public repository.
Deployment: Write the Pulumi code in TypeScript to deploy the Helm chart, and then run pulumi up to perform the deployment.

Now, let's write the Pulumi program in TypeScript:

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

// Create a Kubernetes provider instance configured to your OpenShift cluster.
// The provider uses your kubeconfig file to authenticate with OpenShift.
const openshiftProvider = new k8s.Provider('openshift-k8s', {
    kubeconfig: '<your-kubeconfig-here>', // Replace with your actual kubeconfig
});

// Deploy the 'jh-gitlab' Helm chart using the Pulumi Kubernetes provider.
const gitlabChart = new k8s.helm.v3.Chart('gitlab-chart', {
    // Specify the chart repository details. Replace these with the correct values for 'jh-gitlab' chart.
    repo: 'gitlab', // The name of the Helm repository
    chart: 'jh-gitlab', // The name of the chart in the repository
    version: 'x.y.z', // The version of the chart to install
    // Add the appropriate values to configure GitLab depending on your requirements.
    // These values override the defaults provided by the chart.
    values: {
        // Provide the necessary configuration values for the chart here.
        // Example:
        // serviceType: 'LoadBalancer',
        // gitlabDomain: 'example.com',
    },
}, { provider: openshiftProvider }); // Ensure the Helm chart is deployed using the OpenShift provider.

// Export the base URL for the deployed GitLab instance.
// This assumes that the Helm chart we are using exposes the necessary service endpoints.
export const gitlabBaseUrl = gitlabChart.getResourceProperty('v1/Service', 'gitlab-chart', 'status').apply(status => {
    return status.loadBalancer.ingress[0].hostname;
});

In this program, we define a Chart resource, which Pulumi uses to deploy the Helm chart to your OpenShift cluster.

The repo property needs to be set to the name of the Helm repository that hosts the jh-gitlab chart. If it's not a standard repository, you may also need to specify its url.
The chart property is set to 'jh-gitlab', or whatever is the correct name of the chart you wish to deploy.
For version, specify the version number of the chart you want to deploy. If you're not sure, you can check for available versions using helm search repo gitlab/jh-gitlab.
The values object is a key-value map where you can override default chart values with your specific configuration. You need to check the specific configuration options for the jh-gitlab Helm chart, which are typically found in the values.yaml file of the Helm chart or in the chart documentation.

Before running the Pulumi program, replace placeholder strings like <your-kubeconfig-here> with actual values that correspond to your OpenShift environment.

Finally, run the following Pulumi CLI commands to deploy the Helm chart:

pulumi up

This command will initiate the deployment process to your OpenShift cluster. Follow the CLI prompts to preview and confirm the deployment.

If you need further adjustment or specific configuration for the jh-gitlab Helm chart, you may need to consult the chart's documentation or look at its values.yaml file for guidance on what can be configured.