Deploy the servicemesh-prometheusrule helm chart on Kubernetes

Question

Pulumi · Accepted Answer

To deploy a Helm chart onto a Kubernetes cluster using Pulumi, you will need to have a Kubernetes cluster running and accessible, which you may have provisioned through Pulumi, a cloud provider's managed services (like AKS, EKS, or GKE), or in any other way.

Pulumi's Kubernetes package allows you to interact with your cluster using Pulumi's infrastructure as code principles. Specifically, you'll be using the Chart class within the kubernetes.helm.sh/v3 module to deploy a Helm chart.

Here is a breakdown of how you'll deploy the servicemesh-prometheusrule Helm chart:

Import the necessary Pulumi and Kubernetes packages.
Create an instance of Chart to represent your Helm chart deployment.
Pass a configuration object to Chart to specify details such as the chart name, version, repository, and any custom values you might want to apply.

Now that you have a basic understanding of the deployment process, below is the detailed Pulumi TypeScript program to deploy the servicemesh-prometheusrule Helm chart on Kubernetes:

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

// Create a new instance of the `Chart` class to deploy a Helm chart.
// You must have the Helm chart's name and optionally the version and other properties.
// In this example, we're deploying the servicemesh-prometheusrule Helm chart.
// Note: You should replace `<YOUR-CHART-VERSION>` with the version of the Helm chart you wish to deploy.
const chartName = "servicemesh-prometheusrule";
const chart = new k8s.helm.v3.Chart(chartName, {
    // The repository where the Helm chart is located.
    // If your chart is part of the stable repository, you may omit the `repo` parameter.
    // In this example, the `repo` value is assumed to be a placeholder URL where the chart is hosted.
    // You must replace `<HELM-CHART-REPOSITORY-URL>` with the actual URL of your chart's repository.
    repo: "<HELM-CHART-REPOSITORY-URL>",
    chart: chartName,
    // Specify the version of the Helm chart.
    version: "<YOUR-CHART-VERSION>",
    // You can provide custom values to the Helm chart by specifying them here.
    // The `values` parameter is an object that contains configuration specific to the Helm chart.
    // Replace the below example configuration with the actual configuration values required for your Helm chart.
    values: {
        // For example, if your Helm chart accepts a `namespace` value, it may look something like this:
        // namespace: "servicemesh",
        // customValue: "customValueHere",
    },
    // If your Helm chart is namespace-specific, you can specify the namespace here.
    // Replace `<YOUR-NAMESPACE>` with the Kubernetes namespace you want the chart to be deployed in.
    namespace: "<YOUR-NAMESPACE>",
    // Add any other Helm chart options here.
});

// Export the base URL for the Prometheus UI so that it is easily accessible.
// This assumes your Helm chart creates a Service with a LoadBalancer that is accessible externally.
// Please adapt the export below to what is provided by your specific Helm chart.
export const prometheusUrl = pulumi.interpolate `http://${chart.getResourceProperty("v1/Service", "<PROMETHEUS-SERVICE-NAME>", "status").apply(status => status.loadBalancer.ingress[0].hostname)}`;

Here's what the above Pulumi program does:

We import the required Pulumi and Kubernetes libraries to access the Helm chart functionalities.
We create a Helm Chart resource using the Pulumi Kubernetes provider. This allows us to define the Helm chart we want to deploy, the version, any custom values for the Helm chart, and the namespace to deploy it in.
The values field allows you to provide custom values to tailor the Helm chart to your needs (like setting up names, labels, resource requirements, etc.). Replace the placeholder with the actual values as per your chart documentation.
Finally, we export the Prometheus URL from the Service created by the Helm chart so you can easily access it after the deployment. Note that you need to replace <PROMETHEUS-SERVICE-NAME> with the actual service name created by the Helm chart, and the logic assumes the standard creation of a LoadBalancer service with an external ingress hostname.

Make sure you replace the placeholders with actual values pertinent to your deployment scenario. Also, pay close attention to the comments and customize the values, namespace, and other properties as required by the Helm chart you are deploying.