Deploy the postgresql-imagestreams helm chart on Opensshift

Question

Pulumi · Accepted Answer

To accomplish this, we'll utilize Pulumi's Kubernetes provider, which allows you to write code that interacts with your Kubernetes clusters. In this case, we'll use the Chart resource from the Kubernetes provider to deploy a Helm chart to an OpenShift cluster. OpenShift is a Kubernetes distribution by Red Hat, so Kubernetes resources and tooling, like Helm, typically work seamlessly with it.

Here’s a high-level overview of what we’ll do:

Import the necessary Pulumi and Kubernetes packages.
Create an instance of the Pulumi Kubernetes provider configured for OpenShift.
Use a Chart resource to deploy the postgresql-imagestreams chart.

To begin, ensure you have the following prerequisites:

Pulumi CLI installed and configured for your account and OpenShift cluster.
Access to an OpenShift cluster where you have permissions to deploy applications.
Helm CLI if you need to customize the chart or values further before deployment.

Let's go over the program now:

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

// Create an instance of the Pulumi Kubernetes provider configured for your OpenShift cluster.
// Assuming that you have configured your Pulumi to work with your Kubernetes cluster,
// Pulumi will use the default context from your kubeconfig file.
const provider = new k8s.Provider('openshift', { /* ... */ });

// Deploy the `postgresql-imagestreams` Helm chart.
const postgresChart = new k8s.helm.v3.Chart('postgresql-imagestreams', {
    // Replace '<chart-repo>' with the actual repository URL where the chart is located.
    repo: '<chart-repo>',
    chart: 'postgresql-imagestreams',
    // Specify the version of the chart if necessary.
    version: '<chart-version>',
    // You can specify custom values according to the chart's `values.yaml` file.
    values: { /* ... */ },
}, { provider });

// Export the name of the chart.
export const chartName = postgresChart.metadata.apply(metadata => metadata.name);

Here’s what each part does:

Provider: The k8s.Provider is used to specify which Kubernetes (and by extension, OpenShift) cluster Pulumi will interact with. Here, we've named our provider openshift, but you're not required to provide additional arguments if your kubeconfig is already pointing to the right OpenShift cluster.
Chart: The Chart resource represents a Helm chart. In its simplest form, you need to provide the chart name and the repository where it’s located. The values property allows you to override any default settings in the chart's values.yaml file.
Export: Finally, we export the chart name to make it easier to identify the deployed resources. You could also export other details, like service URLs or any other outputs of interest from the Helm chart.

Remember to replace placeholders such as <chart-repo> and <chart-version> with the actual information about the PostgreSQL Image Streams Helm chart you wish to deploy. If you don't have a specific version in mind, you can omit the version property to use the latest one.

Exporting things like the chart name outside of the Pulumi program allows you to use them in subsequent Pulumi programs or to query them using the Pulumi CLI.

For more detailed information about the Chart resource and what you can do with it, you can refer to the Pulumi Kubernetes API Docs for Helm Chart.

To run your Pulumi program:

Save the code to a file with a .ts extension, for example, deploy-postgres.ts.
Run pulumi up from the command line, in the same directory as your file. This will start the deployment process.
Review the proposed changes and select yes to deploy the Helm chart to your OpenShift cluster.
Once the deployment is complete, use the OpenShift console or oc CLI to verify that the PostgreSQL Image Streams are running.

Please replace placeholders and configure it as per your Helm chart repository and OpenShift environment. If you have any questions or need further assistance, don't hesitate to ask.