Deploy the prometheus-storage-adapter helm chart on Kubernetes

Question

Pulumi · Accepted Answer

Deploying a Helm chart on Kubernetes using Pulumi involves a few steps. You need to specify the chart you want to deploy, potentially provide configuration values (e.g., via `values.yaml` or a values object in your Pulumi program), and of course, have access to a Kubernetes cluster where the chart should be deployed.

Below is a Pulumi program that demonstrates these steps using the `kubernetes.helm.v3.Chart` resource from the Pulumi Kubernetes provider. This resource allows you to deploy Helm charts into a Kubernetes cluster. The chart name in this case would be `prometheus-storage-adapter` assuming that it's available in the Helm repository you are using.

Please ensure that you have Pulumi installed and the Kubernetes context configured for the cluster you plan to deploy to. Replace `"YOUR_NAMESPACE"` with the Kubernetes namespace where you want to deploy the Prometheus Storage Adapter, and the `repo` property with the URL of the Helm chart repository where the `prometheus-storage-adapter` chart is hosted.

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

// Create an instance of the Helm chart.
// Note: The repo URL here is a placeholder and should be replaced with the actual
// location of the prometheus-storage-adapter helm chart.
const chart = new kubernetes.helm.v3.Chart("prometheus-storage-adapter", {
    chart: "prometheus-storage-adapter",
    version: "CHART_VERSION", // Replace with the desired chart version
    namespace: "YOUR_NAMESPACE",
    fetchOpts: {
        repo: "https://charts.example.com/", // Replace with the Helm repository URL
    },
    // If you have custom values, you can specify them using the 'values' property:
    // values: {
    //     key: "value",
    //     // Additional custom configuration here
    // },
});

// Export the base URL for the Prometheus Storage Adapter service
export const prometheusStorageAdapterUrl = chart.getResourceProperty(
    "v1/Service",
    "prometheus-storage-adapter",
    "status"
).apply(status => `http://${status.loadBalancer.ingress[0].ip}`);
```

This Pulumi program:

1. Imports the Pulumi Kubernetes package.
2. Creates a new Helm chart instance, which Pulumi will manage. You specify the name of the chart, the version, namespace, and any specific configurations via the `values` property. In this program, the `values` property is commented out because custom configurations will vary depending on specific needs and the Helm chart used.
3. Optionally, it exports an URL that can be used to access the Prometheus Storage Adapter service assuming it exposes a LoadBalancer service. Please note that not all applications will create a LoadBalancer by default, so you may need to adjust this based on the actual services created by the chart.

Make sure you replace `CHART_VERSION` with the specific version of the `prometheus-storage-adapter` chart you want to deploy, and the `repo` property with the actual repository URL containing the chart.

To run this program, save it to a file named `index.ts`, then run the following commands:

```bash
pulumi up
```

Pulumi will show a preview of the resources to be created and ask for confirmation before proceeding with the deployment. After you confirm, Pulumi will deploy the `prometheus-storage-adapter` Helm chart to your Kubernetes cluster in the specified namespace.