Deploy the flink-kubernetes-operator-crds helm chart on Google Kubernetes Engine (GKE)

Question

Pulumi · Accepted Answer

To deploy the Flink Kubernetes Operator Custom Resource Definitions (CRDs) using a Helm chart on Google Kubernetes Engine (GKE), you'll need to follow these steps:

1. Set up a new GKE cluster or use an existing one.
2. Install and configure Helm (if not already done).
3. Add the Helm repository that contains the Flink Kubernetes Operator CRDs chart.
4. Deploy the chart to your Kubernetes cluster using Helm.

In Pulumi, this can be achieved using a mix of the Pulumi GCP package for managing Kubernetes clusters and the Pulumi Kubernetes package for deploying Helm charts.

The following program demonstrates how to create a new GKE cluster and then deploy the Flink Kubernetes Operator CRDs onto that cluster using a Helm chart. This assumes you have already set up Pulumi with the correct configuration for your GCP project and that you're authenticated to use both Pulumi and GCP.

First, you'll need to import the necessary Pulumi packages in your TypeScript program:

- `@pulumi/gcp` for managing resources on Google Cloud Platform.
- `@pulumi/kubernetes` for working with Kubernetes resources, including deploying Helm charts.

Here's the Pulumi TypeScript program:

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

// Create a GKE cluster
const cluster = new gcp.container.Cluster("flink-operator-cluster", {
    initialNodeCount: 1,
    minMasterVersion: "latest",
    nodeVersion: "latest",
    nodeConfig: {
        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 Kubernetes config
export const kubeConfig = cluster.masterAuth.apply(masterAuth => {
    const context = `${gcp.config.project}_${gcp.config.zone}_${clusterName}`;
    return `apiVersion: v1
clusters:
- cluster:
    certificate-authority-data: ${masterAuth.clusterCaCertificate}
    server: https://${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
`;
});

// Create a Kubernetes provider instance using the cluster's kubeconfig
const k8sProvider = new k8s.Provider("k8s-provider", {
    kubeconfig: kubeConfig,
});

// Add the Helm repository
const flinkOperatorRepo = new k8s.helm.v3.Repository("flink-operator-repo", {
    name: "flink-operator-repo",
    url: "https://flink-operator-repo/path/to/chart", // Replace with the actual Helm repo URL
}, { provider: k8sProvider });

// Deploy the flink-kubernetes-operator-crds Helm chart
const flinkOperatorChart = new k8s.helm.v3.Chart("flink-operator-chart", {
    chart: "flink-kubernetes-operator-crds",
    version: "0.1.0", // Specify the chart version you want to deploy
    repositoryOpts: {
        repo: flinkOperatorRepo.name,
    },
}, { provider: k8sProvider });

// Export the Helm chart's status
export const flinkOperatorChartStatus = flinkOperatorChart.status;
```

Replace `"https://flink-operator-repo/path/to/chart"` with the actual URL of the Helm repository containing the `flink-kubernetes-operator-crds` chart.

Running this program will:

- Provision a new GKE cluster.
- Configure a Pulumi Kubernetes Provider to interact with the new cluster using the exported kubeconfig.
- Add a Helm repository that contains the Flink Kubernetes Operator CRDs chart.
- Deploy the `flink-kubernetes-operator-crds` Helm chart from the specified repository onto your GKE cluster.

Ensure that you replace the placeholder URL with the actual repository URL hosting the Flink Kubernetes Operator CRDs chart. The `chart` property in the `k8s.helm.v3.Chart` resource should match the name of the chart in the repository.

The `kubeConfig` string generated in this program configures a Kubernetes provider instance (`k8sProvider`) to authenticate against the GKE cluster using `gcloud` as the Kubernetes auth provider.

The status of the Helm chart deployment can be monitored using the exported `flinkOperatorChartStatus`.

Remember to adjust the node count, machine type, and version according to your requirements and GKE's available options.