Deploy the prometheus-jsonpath-exporter helm chart on AWS EKS

Question

Pulumi · Accepted Answer

To deploy the `prometheus-jsonpath-exporter` helm chart on AWS EKS, you'll need to follow these steps:

1. **Create an EKS Cluster**: Set up an Amazon EKS cluster which will run your Kubernetes workloads.
2. **Install the Helm Chart**: Use Pulumi's Kubernetes provider to deploy the `prometheus-jsonpath-exporter` Helm chart onto your EKS cluster.

Below is a Pulumi program in TypeScript that demonstrates how to accomplish these tasks. I will explain each part of the program as we go through it.

First, we import the necessary Pulumi and AWS packages. We approximate that you're looking for an EKS cluster to which you'll deploy a Helm Chart, so we will illustrate that process.

```typescript
import * as eks from "@pulumi/eks";
import * as pulumi from "@pulumi/pulumi";
import * as k8s from "@pulumi/kubernetes";
import * as aws from "@pulumi/aws";

// Create an EKS Cluster
const cluster = new eks.Cluster("my-cluster", {
    instanceType: "t2.medium", // instance type for the EKS cluster nodes
    desiredCapacity: 2,        // number of EC2 instances to launch in the EKS cluster
    minSize: 1,                // minimum number of EC2 instances in the EKS cluster
    maxSize: 3,                // maximum number of EC2 instances in the EKS cluster
    storageClasses: "gp2",     // the default storage class will use the GP2 volume type
    deployDashboard: false,    // indicate if the Kubernetes dashboard should be deployed
});

// Export the cluster's kubeconfig
export const kubeconfig = cluster.kubeconfig;

// Deploy the Prometheus Jsonpath Exporter Helm chart
const prometheusJsonpathExporterChart = new k8s.helm.v3.Chart("prometheus-jsonpath-exporter", {
    chart: "prometheus-jsonpath-exporter",
    version: "1.0.0", // replace with the desired chart version
    fetchOpts: {
        repo: "http://your-helm-chart-repo/", // replace with the Helm chart repository URL
    },
    // Values from the Helm chart's `values.yaml` can be provided here.
    values: {
        // Your custom values go here.
    },
}, { provider: new k8s.Provider("k8s-provider", { kubeconfig: cluster.kubeconfig }) });

// Export the status of the deployed Helm chart
export const helmChartStatus = prometheusJsonpathExporterChart.status;
```

### Explanation:

1. **Importing Packages**: We first import necessary Pulumi packages, including `eks` for managing EKS clusters, `k8s` for interacting with Kubernetes, and `aws` for AWS resources.
   
2. **Creating an EKS Cluster**: The `eks.Cluster` resource creates an EKS cluster. You can customize properties such as `instanceType`, `desiredCapacity`, `minSize`, `maxSize`, and `deployDashboard` as needed.

3. **Exporting `kubeconfig`**: We export the `kubeconfig` of the cluster, which allows us to interact with the cluster using `kubectl` and other Kubernetes tools. This is a representation of credentials and endpoint information needed to connect to the Kubernetes cluster that was just created.

4. **Deploying the Helm Chart**: The `k8s.helm.v3.Chart` resource is where the `prometheus-jsonpath-exporter` helm chart is deployed to your EKS cluster. The `chart` property specifies the name of the chart, and the `version` property specifies the chart version. The `fetchOpts.repo` holds the URL to your Helm chart repository. Under `values`, you can specify the configuration for your deployment which corresponds to settings found in the Helm chart's `values.yaml` file. It's using the `kubeconfig` from the EKS cluster to authenticate to Kubernetes.

5. **Exporting Helm Chart Status**: Finally, we export the `helmChartStatus` which gives us information about the deployed Helm chart. This can help you understand the state of your deployment.

Deploy this Pulumi program using these simple steps:
1. Set up AWS credentials and configure Pulumi CLI.
2. Save the above code in a file named `index.ts`.
3. Run `pulumi up` from the command line in the same directory where your `index.ts` file is located.
4. Confirm the deployment when prompted by Pulumi.

After deployment, you'll be able to access the services provided by the `prometheus-jsonpath-exporter` in your Kubernetes cluster on AWS EKS.