Deploy the postgresql-client helm chart on Opensshift

Question

Pulumi · Accepted Answer

To deploy a Helm chart on OpenShift using Pulumi, we'll use the kubernetes.helm.v3.Chart resource, which provides a way to deploy Helm charts in a Kubernetes cluster. Here, we are particularly interested in deploying the postgresql-client chart, which we will assume is part of a public or private repository that OpenShift can access.

Since we're targeting OpenShift, you'll want to ensure that kubectl is configured to connect to your OpenShift cluster, and that you have the necessary permissions to deploy Helm charts within the cluster. Pulumi uses your local kubeconfig file by default, which means it will use the current context to deploy resources. If you're using a different setup, make sure to configure Pulumi accordingly.

The following Pulumi TypeScript program will deploy the postgresql-client Helm chart to your OpenShift cluster. Replace the <CHART_REPO_URL> placeholder with the URL of the Helm chart repository that contains the postgresql-client chart.

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

// Define the settings for the postgresql-client Helm chart.
// You will need to replace <CHART_REPO_URL> with the actual Helm chart repository URL.
const postgresqlClientChart = new k8s.helm.v3.Chart("postgresql-client", {
  chart: "postgresql-client",
  version: "<CHART_VERSION>", // Specify the chart version if needed
  fetchOpts: {
    repo: "<CHART_REPO_URL>", // Use the appropriate repository URL
  },
  // Set the values for the chart here. Below are example values.
  values: {
    // Value overrides for the Helm chart.
    // This could be settings like PostgreSQL server hostname, credentials, ports, etc.
    // The values here are placeholders and you should refer to the chart's documentation
    // for what values are accepted.
    postgresqlHost: "hostname-of-postgresql-server",
    postgresqlPort: "5432",
    // If you need specific configurations according to the 
    // PostgreSQL client chart's values, define them here.
  },
  // Define the namespace where you want the chart to be deployed.
  namespace: "default", // Update to a specific namespace if needed
});

// If you need to export any details about the deployment, such as the service URL,
// you can get it from the resources created by Helm and export them.
export const chartName = postgresqlClientChart.name;

Here is what the program does:

It imports the Kubernetes (@pulumi/kubernetes) module, which allows you to write infrastructure as code for Kubernetes resources. Make sure you have this module installed in your project.
It creates a new Helm chart resource using new k8s.helm.v3.Chart, which is Pulumi's way of implementing Helm chart deployment.
The chart property specifies the name of the chart to be deployed, which is postgresql-client.
The version property allows you to specify a fixed version of the Helm chart. It's best to lock this to a specific version to ensure consistent deployments.
The fetchOpts property's repo field is where you specify the URL of your Helm chart repository.
The values property allows you to set configuration options for the Helm chart, similar to how you would configure a chart using values.yaml with Helm directly.
The namespace property determines which namespace the chart will be deployed in. This example uses the default namespace, but you can customize this as needed.
Lastly, export const chartName creates a Pulumi stack export, which will display the name of the chart after Pulumi has finished deploying.

To apply this configuration, run the Pulumi command to update your stack. This command depends on CLI context and whether you are using Pulumi in a CI/CD environment or not. In a local environment, you typically run pulumi up.

Make sure to replace <CHART_REPO_URL> with the actual URL of your Helm chart repository, and set any Helm chart values you wish to override in the values property. If there are additional configuration settings or if authentication to the Helm repository is needed, you will need to include that as part of the chart settings or as part of your cluster configuration before running the Pulumi program.

Remember, this is a real Pulumi program. Once you configure your environment with the necessary information, including the repository URL and any required values, you can run this code using Pulumi to deploy the postgresql-client Helm chart to your OpenShift cluster.