Enabling Object Storage via Rook-Ceph for S3-Compatible Interfaces in Kubernetes

Question

Pulumi · Accepted Answer

To enable object storage via Rook-Ceph for S3-Compatible interfaces in Kubernetes, you would typically use Rook to deploy and manage Ceph within your Kubernetes clusters. Rook is an open-source cloud-native storage orchestrator for Kubernetes, and it leverages Ceph to provide a distributed storage system without a single point of failure.

In this context, you'll set up Rook to deploy a Ceph cluster, which will be configured to expose an S3-compatible object store that applications can use to store and retrieve data in a manner similar to AWS S3.

Below I will guide you through the necessary steps to accomplish this using Pulumi and TypeScript.

### Prerequisites:

- A Kubernetes cluster set up and accessible via `kubectl`
- Pulumi CLI installed and set up to work with your Kubernetes cluster
- Node.js and npm installed to run the TypeScript Pulumi program

### Setting up Rook-Ceph:

1. **Install Rook-Ceph Operator**: The first step is to install the Rook-Ceph operator in your Kubernetes cluster. This operator will manage the lifecycle of the Ceph storage resources.

2. **Create a Ceph Cluster**: Once the Rook-Ceph operator is running, you will create a CephCluster resource. This represents the Ceph cluster itself and will consist of various storage components such as monitors, managers, and storage nodes.

3. **Create a Ceph Object Store**: After the Ceph cluster is up, you will create a CephObjectStore resource. This component is responsible for providing the S3-compatible interface.

4. **Expose the Object Store as a Service**: Finally, you will expose the Ceph Object Store to be accessible within or potentially outside the Kubernetes cluster, depending on your preference and security considerations.

Below is a TypeScript program using Pulumi that you might use to facilitate this setup. Please remember that this program assumes the presence of a Pulumi project and a configured Kubernetes cluster.

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

// STEP 1: Deploy Rook-Ceph Operator
const rookCephNamespace = new k8s.core.v1.Namespace("rook-ceph", {
    metadata: { name: "rook-ceph" }
});

const rookCephOperator = new k8s.yaml.ConfigFile("rook-ceph-operator", {
    file: "https://raw.githubusercontent.com/rook/rook/master/deploy/examples/operator.yaml",
    transformations: [ (res: any) => res.metadata.namespace = rookCephNamespace.metadata.name ],
});

// STEP 2: Create a Ceph Cluster
const cephCluster = new k8s.yaml.ConfigFile("ceph-cluster", {
    file: "https://raw.githubusercontent.com/rook/rook/master/deploy/examples/cluster.yaml",
    transformations: [ (res: any) => res.metadata.namespace = rookCephNamespace.metadata.name ],
}, { dependsOn: rookCephOperator });

// STEP 3: Create a Ceph Object Store
const cephObjectStore = new k8s.yaml.ConfigFile("ceph-object-store", {
    file: "https://raw.githubusercontent.com/rook/rook/master/deploy/examples/object.yaml",
    transformations: [ (res: any) => res.metadata.namespace = rookCephNamespace.metadata.name ],
}, { dependsOn: cephCluster });

// STEP 4: Exposing the Object Store as a Service
const objectStoreService = new k8s.yaml.ConfigFile("object-store-service", {
    file: "https://raw.githubusercontent.com/rook/rook/master/deploy/examples/object-openshift.yaml",
    transformations: [ (res: any) => res.metadata.namespace = rookCephNamespace.metadata.name ],
}, { dependsOn: cephObjectStore });

// Export the endpoint to access the S3-Compatible Object Store
const s3Endpoint = objectStoreService.getResource("v1/Service", "rook-ceph", "rook-ceph-rgw-my-store").status;
export const s3EndpointUrl = pulumi.interpolate`http://${s3Endpoint.loadBalancer.ingress[0].ip}:80`;
```

In this program:

- We import the required Pulumi Kubernetes package.
- We define the namespace for the Rook-Ceph deployment.
- We use the Pulumi Kubernetes YAML module to deploy the Rook-Ceph operator, Ceph cluster, and object store directly from the Rook GitHub repository.
- We apply a transformation to each resource to ensure they are created within the correct namespace.
- We establish dependencies between resources using the `dependsOn` option to ensure they are created in the correct order.
- We export the S3-compatible endpoint as a Pulumi stack output.

To apply this program, you need to run `pulumi up` from the directory where the Pulumi program file is located. This command will initiate the deployment process to your Kubernetes cluster.

Please note that the actual YAML files from the Rook project may change, and you should ensure you use the correct versions that work with your Kubernetes cluster version and that they reflect your desired deployment topology and settings.