# Prometheus Node Exporter Add-on

This add-on installs [prometheus-node-exporter](https://github.com/prometheus/node_exporter).

prometheus-node-exporter Add-on enables you to measure various machine resources such as memory, disk and CPU utilization.

## Usage

```typescript
import * as cdk from 'aws-cdk-lib';
import * as blueprints from '@aws-quickstart/eks-blueprints';

const app = new cdk.App();

const addOn = new blueprints.addons.PrometheusNodeExporterAddOn()

const blueprint = blueprints.EksBlueprint.builder()
  .version("auto")
  .addOns(addOn)
  .build(app, 'my-stack-name');
```

## Configuration Options

- `createNamespace`: (boolean) If you want CDK to create the namespace for you
- `values`: Arbitrary values to pass to the chart. 
- [Standard helm configuration options](https://github.com/aws-quickstart/cdk-eks-blueprints/blob/main/docs/addons/index.md#standard-helm-add-on-configuration-options).

## Validation

To validate that prometheus-node-exporter is installed properly in the cluster, check if the prometheus-node-exporter namespace is created and pods are running.

Verify if the pods are running correctly for prometheus-node-exporter in `prometheus-node-exporter` namespace.
```bash
  kubectl get pods -n prometheus-node-exporter
```

## Output

There should list pods starting with name `prometheus-node-exporter`
For Eg:
```bash
NAME                             READY   STATUS    RESTARTS   AGE
prometheus-node-exporter-l7s25   1/1     Running   0          105m
prometheus-node-exporter-zh5sn   1/1     Running   0          105m
```

## Functionality

Applies the prometheus-node-exporter add-on to an Amazon EKS cluster.