Deploy the ibm-glusterfs helm chart on Google Kubernetes Engine (GKE)

Question

Pulumi · Accepted Answer

To deploy the IBM GlusterFS Helm chart on Google Kubernetes Engine (GKE), you will need to perform the following steps:

1. **Create a GKE Cluster**: This is the underlying Kubernetes cluster where your applications will be deployed. You need to specify the details of the cluster, such as the region or zone, the machine type, and the number of nodes.

2. **Set up Helm**: Helm is a package manager for Kubernetes, which allows you to define, install, and upgrade even the most complex Kubernetes applications.

3. **Deploy the Helm Chart**: Helm charts are packages of pre-configured Kubernetes resources. You will need to deploy the Helm chart for IBM GlusterFS, which will create the required resources on your GKE cluster.

Below is the TypeScript program for Pulumi that sets up the GKE cluster and deploys the IBM GlusterFS Helm chart. Make sure you have Pulumi installed and have access to a Google Cloud project with billing enabled.

### Prerequisites

- Pulumi CLI: Ensure you have the Pulumi CLI [installed](https://www.pulumi.com/docs/get-started/install/).
- GCP Credentials: Configure your GCP credentials for Pulumi to use, either by running `gcloud auth application-default login` or by setting the `GOOGLE_CREDENTIALS` [environment variable](https://www.pulumi.com/registry/packages/gcp/installation-configuration/#environment-variables).
- Helm: The GlusterFS Helm chart will be deployed using the Pulumi Kubernetes provider, which requires Helm to be installed in your CLI environment. Follow the [Helm installation guide](https://helm.sh/docs/intro/install/) to set it up.

### Pulumi Program

This program creates a GKE cluster and deploys the IBM GlusterFS Helm chart to it:

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

// Create a GKE cluster
const cluster = new gcp.container.Cluster("gke-cluster", {
    initialNodeCount: 2,
    minMasterVersion: "latest",
    nodeVersion: "latest",
    nodeConfig: {
        preemptible: true,
        machineType: "n1-standard-1",
        oauthScopes: [
            "https://www.googleapis.com/auth/compute",
            "https://www.googleapis.com/auth/devstorage.read_only",
            "https://www.googleapis.com/auth/logging.write",
            "https://www.googleapis.com/auth/monitoring"
        ],
    },
});

// Export the Cluster name
export const clusterName = cluster.name;

// Export the Cluster kubeconfig
export const kubeconfig = pulumi.
    all([cluster.name, cluster.endpoint, cluster.masterAuth]).
    apply(([name, endpoint, masterAuth]) => {
        const context = `${gcp.config.project}_${gcp.config.zone}_${name}`;
        return `apiVersion: v1
clusters:
- cluster:
    certificate-authority-data: ${masterAuth.clusterCaCertificate}
    server: https://${endpoint}
  name: ${context}
contexts:
- context:
    cluster: ${context}
    user: ${context}
  name: ${context}
current-context: ${context}
kind: Config
preferences: {}
users:
- name: ${context}
  user:
    auth-provider:
      config:
        cmd-args: config config-helper --format=json
        cmd-path: gcloud
        expiry-key: '{.credential.token_expiry}'
        token-key: '{.credential.access_token}'
      name: gcp
`;
    });

// Set up the Kubernetes provider to use the created GKE cluster
const k8sProvider = new k8s.Provider("gke-k8s", {
    kubeconfig: kubeconfig,
});

// Deploy the IBM GlusterFS Helm chart to the GKE cluster
const glusterfsChart = new k8s.helm.v3.Chart("ibm-glusterfs", {
    chart: "glusterfs",
    version: "1.0.0", // replace with the actual chart version
    fetchOpts:{
        repo: "https://charts.example.com/", // replace this with the actual Helm chart repository
    },
}, { provider: k8sProvider });

// Export the Helm chart resources
export const glusterfsChartResources = glusterfsChart.resources;
```

### Explanation

Here's a breakdown of what the above program does:

- We import the necessary Pulumi packages for working with GCP (`@pulumi/gcp`) and Kubernetes (`@pulumi/kubernetes`).
- We create a new GKE cluster with a defined node count and machine specifications.
- The cluster's name and kubeconfig are exported so that they can be used to access the Kubernetes cluster outside of Pulumi.
- We instantiate a Kubernetes provider, `k8sProvider`, which abstracts the authentication details needed to communicate with your GKE cluster.
- We deploy the IBM GlusterFS Helm chart using Pulumi's `Chart` resource. This requires specifying the chart name, version, and repository.

Make sure to replace the placeholders like the chart version and repository URL with actual values specific to the IBM GlusterFS Helm chart you wish to deploy.

To run this Pulumi program:

1. Save the code to a file with a `.ts` extension, for example, `deploy-glusterfs-gke.ts`.
2. Run `pulumi up` to create the resources. This will prompt you to confirm the action before proceeding.

This will provision a new GKE cluster and deploy the Helm chart for IBM GlusterFS into it. You can check the status of the deployment and manage the resources using Pulumi's CLI.