Deploy the rox-image-check helm chart on Google Kubernetes Engine (GKE)

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Pulumi · Accepted Answer

To deploy the `rox-image-check` Helm chart on Google Kubernetes Engine (GKE), you'll use Pulumi to:

1. Create a GKE cluster.
2. Deploy the Helm chart to the GKE cluster.

Each step involves creating Pulumi resources that represent the corresponding Google Cloud resources.

First, you create a GKE cluster using the `Cluster` resource from the Pulumi Google Native provider, which allows you to define a Kubernetes cluster in Google Cloud. In this example, the cluster is created with default configurations which are suitable for a wide range of applications. The cluster will have a default node pool, which is a group of nodes within the Kubernetes cluster, and is managed by GKE to handle pod scheduling and run workloads.

After the cluster is up and running, you'll deploy the `rox-image-check` Helm chart using Pulumi's `helm.v3.Release` resource. This represents a Helm chart release and allows you to declare the desired state of the Helm chart within your GKE cluster.

Now let's look at the complete Pulumi program in TypeScript:

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

// Step 1: Create a GKE cluster
const cluster = new gcp.container.Cluster("rox-image-check-cluster", {
    initialNodeCount: 2,
    minMasterVersion: "latest", // This will use the latest available version of GKE
    nodeVersion: "latest",
    nodeConfig: {
        machineType: "n1-standard-1", // This specifies what kind of machine to run on each node
        oauthScopes: [
            "https://www.googleapis.com/auth/cloud-platform"
        ]
    },
});

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

// Export the Kubeconfig to access the Cluster
export const kubeConfig = cluster.name.apply(name => {
    const context = `${gcp.config.project}_${gcp.config.zone}_${name}`;
    return `apiVersion: v1
clusters:
- cluster:
    certificate-authority-data: ${cluster.masterAuth[0].clusterCaCertificate}
    server: https://${cluster.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
`;
});

// Step 2: Deploy the `rox-image-check` Helm chart to the GKE cluster
const roxImageCheckChart = new k8s.helm.v3.Release("rox-image-check", {
    chart: "rox-image-check",
    version: "1.0.0", // Replace with the desired chart version
    repositoryOpts: {
        repo: "https://example-repo/helm/charts", // Replace with the chart's repository URL
    },
    // Values to pass to the Helm chart
    values: {
        serviceAccount: {
            create: true,
        },
        // Insert additional configuration if needed
    },
}, { provider: new k8s.Provider("k8s-provider", { kubeconfig: kubeConfig }) });

// Export the status of the Helm release
export const helmStatus = roxImageCheckChart.status;
```

In this program:

- A GKE cluster is created with two nodes using `n1-standard-1` machine types.
- The `kubeConfig` is dynamically generated and can be used to interact with the new GKE cluster using the `kubectl` command-line tool.
- The Helm chart `rox-image-check` is deployed using the `helm.v3.Release` resource. This requires specifying the chart name, version, and repository URL.
- You can add specific values you may want to override in the Helm chart within the `values` property.

To apply this Pulumi program:

1. Save the code above to a file named `index.ts`.
2. Run `pulumi up` from the same directory to create the GKE cluster and deploy the Helm chart.

Remember that you need to replace `"https://example-repo/helm/charts"` with the actual Helm chart repository URL and `"1.0.0"` with the chart version that you want to deploy.

This Pulumi program is a template, and you might need to modify the chart version, values, or machine type depending on your specific needs and the specifications of the `rox-image-check` Helm chart.