Deploy the simple-prometheus helm chart on Kubernetes

Question

Pulumi · Accepted Answer

To deploy a Helm chart on a Kubernetes cluster using Pulumi, you would typically use the Chart resource from Pulumi Kubernetes SDK. This resource allows you to install, upgrade, and manage Helm charts in your Kubernetes cluster.

Before you proceed, ensure that you have a Kubernetes cluster up and running. You must have kubeconfig configured correctly to point to your Kubernetes cluster. This will be used by Pulumi to communicate with your cluster.

Here's how to use the Chart resource from the Pulumi Kubernetes package to deploy the simple-prometheus Helm chart:

Define the Chart: Set up a new chart instance that points to the simple-prometheus chart. You will need to specify the chart name, version (optional), and any custom values you want to override in the chart's default configuration.
Configure the Chart Values: Helm charts are configured using values that define certain parameters of the deployment. For example, you might need to set the number of replicas for a deployment, resource requests/limits, or service types. You can override these default values in the values section.
Launch the Deployment: When you run pulumi up, Pulumi will communicate with your Kubernetes cluster to launch the defined Helm chart.

Now, let's write the Pulumi code to deploy the simple-prometheus Helm chart:

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

// Define the settings for your deployment
const prometheusChart = new k8s.helm.v3.Chart("simple-prometheus", {
    // Point to the repository of the chart
    repo: "prometheus-community",
    // The name of the chart
    chart: "prometheus",
    // You can specify the version of the chart here, if needed
    // version: "<CHART_VERSION>",
    // Specify the namespace where the chart will be installed (optional)
    namespace: "monitoring",
    // Define the values for the chart
    values: {
        // Custom values to configure the Prometheus chart
        // This is just an example; use the appropriate values to tailor the deployment to your needs
        server: {
            service: {
                type: "LoadBalancer",
            },
        },
    },
}, { provider: k8sProvider }); // Ensure you're passing the correct Kubernetes Provider

// Export the chart's status to confirm the deployment
export const prometheusChartStatus = prometheusChart.status;

Make sure you replace <CHART_VERSION> with the specific version of the simple-prometheus chart you intend to deploy, if necessary.

This code defines a Pulumi project where a single Kubernetes resource, simple-prometheus Helm chart, is managed. It specifies settings such as the chart repository, chart name, and namespace for the deployment.

After writing this code in a .ts file within a Pulumi project, run the following Pulumi CLI commands to apply your configuration:

pulumi up

This command will start the deployment process. Pulumi will show you a preview of the resources that will be created. After reviewing these, you can proceed to confirm the changes which will trigger the deployment to your Kubernetes cluster.

To view the status of your deployment after it's been applied, you can use the following Pulumi CLI command:

pulumi stack output prometheusChartStatus

This Pulumi program is a starting point for deploying the simple-prometheus Helm chart. You can customize the values to configure the Prometheus deployment to better fit your requirements. Make sure to check the Prometheus chart documentation for all available configuration options.

Remember, the above code assumes you have a Kubernetes cluster running and kubeconfig set up. Without a proper Kubernetes context, Pulumi won't be able to deploy the chart.