Deploy the barbican helm chart on Google Kubernetes Engine (GKE)

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Pulumi · Accepted Answer

Deploying the barbican Helm chart on Google Kubernetes Engine (GKE) using Pulumi involves several steps. Before you begin, ensure you have access to a GCP account with permissions to create and manage GKE clusters and Helm charts deployments. You'll also need Pulumi installed and configured to use your GCP credentials.

### Steps to Deploy barbican Helm Chart on GKE:

1. **Set up a GKE cluster**: Creating a GKE cluster is the first step. You need a Kubernetes cluster to deploy your Helm chart.
2. **Install Helm**: Helm is a package manager for Kubernetes that simplifies deployment.
3. **Deploy the barbican Helm Chart**: Once Helm is set up, you can deploy the barbican Helm chart to your GKE cluster.

### Pulumi Program to Deploy barbican Helm Chart on GKE:

Below is a Pulumi program written in TypeScript that performs the above steps. Comments within the code explain what each section does.

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

// Create a GKE cluster
const cluster = new gcp.container.Cluster("barbican-cluster", {
    // Specify your desired settings for the cluster, here are some examples
    initialNodeCount: 2,
    minMasterVersion: "latest", // Use the latest GKE version available
    nodeVersion: "latest",
    nodeConfig: {
        machineType: "n1-standard-1", // Choose the appropriate machine type for your use case
        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;

// Initializing the Kubernetes provider using the credentials from the created cluster.
const k8sProvider = new k8s.Provider("k8s-provider", {
    kubeconfig: cluster.kubeConfigRaw,
});

// Deploy the barbican Helm chart into the GKE cluster
const barbicanChart = new k8s.helm.v3.Chart("barbican-chart", {
    // Replace 'chart-name' and 'chart-version' with actual chart details
    chart: "barbican",
    version: "x.y.z", // specify the version of the chart
    // You can specify the helm repository as an option if the chart is not packaged locally
    fetchOpts: {
        repo: "https://charts.example.com/", // placeholder for actual Helm chart repository
    },
}, { provider: k8sProvider });

// Export the Helm chart deployment status
export const barbicanChartStatus = barbicanChart.status;
```

#### Explanation:

- We import the necessary Pulumi libraries for working with GCP and Kubernetes.

- We create a GKE cluster resource with the desired settings using `gcp.container.Cluster`.

- The `kubeconfig` generated by Pulumi for the new GKE cluster is used to initialize a Kubernetes provider.

- We use Pulumi's Kubernetes library to deploy the Helm chart. Here, you'll need to replace `"barbican"`, `"x.y.z"`, and the Helm repository URL with the actual chart name, version, and repository URL for Barbican.

- Finally, we export the GKE cluster name and the status of the Helm chart deployment which can be accessed from the Pulumi CLI after deployment.

Please replace placeholders like `x.y.z` and the `repo` URL with the actual values specific to the barbican Helm chart you want to deploy.

To run the Pulumi program, save it to a `index.ts` file in a new Pulumi project directory, and then use the following commands:

```bash
# Login to Pulumi - this will store your state remotely in the default Pulumi Service backend.
pulumi login

# Initialize a new Pulumi stack, which is an isolated environment for your app
pulumi stack init dev

# Install the necessary packages from NPM for your Pulumi program
npm install @pulumi/gcp @pulumi/kubernetes @pulumi/pulumi

# Review the plan to see the infrastructure Pulumi will create
pulumi preview

# Deploy the infrastructure to GCP
pulumi up
```

This Pulumi program will stand up a new GKE cluster, configure kubectl, install Helm into the GKE cluster, and deploy the barbican Helm chart. After running `pulumi up`, you should be able to use kubectl to interact with your GKE cluster and see your Helm-deployed services running.