Using kubernetes monitoring.grafana.com with snapshot.storage.k8s.io

Question

Pulumi · Accepted Answer

In this example, we will create a Pulumi program that uses Kubernetes to deploy and configure a monitoring setup for your cluster using Grafana, and manage snapshots for persistent storage using the `snapshot.storage.k8s.io` API.

Firstly, let's discuss the resources we are about to use:

- **Grafana.SyntheticMonitoringInstallation**: This is a Pulumi resource that represents an installation of the Synthetic Monitoring stack within Grafana Cloud. Synthetic Monitoring is a blackbox monitoring solution, it allows you to monitor your services and APIs from around the globe. You'll need a Grafana Cloud account with a valid `stackId` and `metricsPublisherKey`.

- **kubernetes.core.v1.PersistentVolumeClaim**: A PersistentVolumeClaim (PVC) is a request for storage by a user. It is similar to a Pod. Pods consume node resources and PVCs consume PV resources. PVCs can request specific size and access modes (e.g., they can be mounted once read/write or many times read-only).

For our purposes, we will not directly interact with PersistentVolumeClaims but rather use it to explain the next point.

- **snapshot.storage.k8s.io API**: This is part of Kubernetes Volume Snapshot feature which allows creating snapshots of the data in your PersistentVolumes (PVs). They can be used to provision a new volume (pre-populated with the snapshot data) or restore an existing one to a previous state.

Now let's write your Pulumi program:

```typescript
import * as k8s from '@pulumi/kubernetes';
import * as pulumi from '@pulumi/pulumi';
import * as grafana from '@pulumi/grafana';

// Create a Kubernetes provider instance.
const provider = new k8s.Provider('k8s-provider', {
  // Assuming you have already configured access to your cluster (e.g., via kubeconfig).
});

// Using a pre-existing Grafana Synthetic Monitoring Installation
// You need to set these configuration based on your own Grafana Cloud setup
const stackId = 'your-grafana-stack-id';                  // specific to your Grafana Cloud setup
const stackSmApiUrl = 'https://api.grafana.com';          // default API URL for Grafana Cloud
const metricsPublisherKey = pulumi.secret('your-grafana-api-key'); // your Grafana Cloud API key

const grafanaSyntheticMonitoring = new grafana.SyntheticMonitoringInstallation('synthetic-monitoring', {
  stackId: stackId,
  stackSmApiUrl: stackSmApiUrl,
  metricsPublisherKey: metricsPublisherKey,
}, { provider: provider });

// Use the Kubernetes VolumeSnapshot feature to manage snapshots
// Here's how you would typically define a VolumeSnapshotClass resource:
// Note: This will not actually create anything as it only defines the class, not the usage.
const volumeSnapshotClass = new k8s.apiextensions.CustomResource(
  'snapshot-class',
  {
    apiVersion: 'snapshot.storage.k8s.io/v1',
    kind: 'VolumeSnapshotClass',
    metadata: {
      name: 'snapshot-class-example'
    },
    driver: 'driver-name', // replace with your storage provider driver name
    deletionPolicy: 'Delete', // defines what happens to snapshots when the original PVC is deleted
    parameters: { // parameters for the storage driver
      // These will be specific to your particular storage backend and configuration
    },
  },
  { provider: provider }
);

// Placeholder for creating VolumeSnapshots.
// You will actually reference an existing PersistentVolumeClaim when creating a VolumeSnapshot.
const volumeSnapshot = new k8s.apiextensions.CustomResource(
  'snapshot-example',
  {
    apiVersion: 'snapshot.storage.k8s.io/v1',
    kind: 'VolumeSnapshot',
    metadata: {
      name: 'snapshot-example',
      namespace: 'default', // Assuming the PVC is in the default namespace
    },
    spec: {
      volumeSnapshotClassName: 'snapshot-class-example',
      source: {
        persistentVolumeClaimName: 'pvc-to-snapshot', // The name of the PVC you're taking a snapshot of
      },
    },
  },
  { provider: provider }
);

// Exporting the URL of the Grafana dashboard here for direct access
export const grafanaDashboardUrl = pulumi.interpolate`https://grafana.com/orgs/${stackId}/dashboards`;
```

Remember, please replace placeholder values like `your-grafana-stack-id`, `your-grafana-api-key`, and the storage provider driver name with actual values applicable to your setup.

You can add the above Pulumi code to a file (e.g., `index.ts`) and run it with the Pulumi CLI command `pulumi up` to provision these resources on your Kubernetes cluster. Please ensure that you've installed @pulumi/kubernetes, @pulumi/pulumi, and @pulumi/grafana NPM packages before running the program.

Furthermore, you must have the appropriate permissions and configurations set up on your Kubernetes cluster to use these APIs, particularly for snapshots, which may require additional setup depending on your storage provider.

The program above demonstrates how to connect a Kubernetes-based Grafana monitoring solution with the snapshot capabilities provided by the Kubernetes API. This will provide you with monitoring insights and data continuity through volume snapshots.