Using gcp alloydb with gke-autoneg-controller

Question

Pulumi · Accepted Answer

In this Pulumi program, we will create a Google Cloud Platform (GCP) AlloyDB cluster and configure a Google Kubernetes Engine (GKE) cluster to use the `gke-autoneg-controller`. The `gke-autoneg-controller` is an add-on for GKE that automatically manages network endpoint groups (NEGs) for Kubernetes services of type `LoadBalancer` or `ClusterIP`.

AlloyDB is a fully managed relational database service for PostgreSQL that offers high availability, durability, and performance at scale.

We will proceed as follows:
1. Set up an AlloyDB cluster.
2. Set up a GKE cluster.
3. Deploy the `gke-autoneg-controller` to the GKE cluster.

Note that you need to have your GCP credentials configured for Pulumi to create resources in your Google Cloud project. You can achieve this by running `gcloud auth application-default login` if you have the Google Cloud SDK installed, or by setting the appropriate environment variables.

### Define the AlloyDB Cluster

First, we create the AlloyDB cluster. We will specify the network and other details for the cluster. For simplicity, this example sets required values directly, but in a production environment, you should use more secure methods, (e.g., `pulumi.Config`), to manage sensitive data like passwords.

### Define the GKE Cluster

Then, we create a GKE cluster, providing it with the necessary configurations. In a real-world application, you might set more options for node pools, networking, and cluster versions.

### Deploy the gke-autoneg-controller to GKE

Finally, we deploy the `gke-autoneg-controller` to the GKE cluster using a Kubernetes manifest. The actual deployment of the `gke-autoneg-controller` is outside of AlloyDB setup but necessary for services running in your GKE cluster to automatically manage NEGs.

Now, let's write the Pulumi program in TypeScript.

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

// Create a new AlloyDB cluster
const alloydbCluster = new gcp.alloydb.Cluster('my-alloydb-cluster', {
    // Replace these with the appropriate values for your environment
    project: 'my-gcp-project',
    location: 'us-central1',
    clusterId: 'my-alloydb-cluster',
    // Include any other necessary properties for the cluster, such as network configuration
    // For this example, we're using default values and minimal configuration
    networkConfig: {
        network: 'default',
        allocatedIpRange: 'default-range',
    },
    initialUser: {
        user: 'admin',
        password: pulumi.secret('super-secure-password'),
    },
    // Additional settings like encryption and backup
});

// Define a GKE cluster to host the gke-autoneg-controller
const gkeCluster = new gcp.container.Cluster('my-gke-cluster', {
    // Replace these with the appropriate values for your environment
    initialNodeCount: 3,
    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",
        ],
    },
});

// Define the Kubernetes provider to deploy the gke-autoneg-controller using the GKE cluster credentials
const k8sProvider = new k8s.Provider('k8sProvider', {
    kubeconfig: gkeCluster.kubeConfigRaw,
});

// Define the Kubernetes manifest for deploying the gke-autoneg-controller
// The manifest YAML typically comes from the project's GitHub repository or documentation
const autonegController = new k8s.yaml.ConfigGroup('autoneg', {
    files: ['https://raw.githubusercontent.com/GoogleCloudPlatform/gke-autoneg-controller/master/deploy/autoneg.yaml'],
}, { provider: k8sProvider });

// Export the AlloyDB cluster name and GKE cluster endpoint
export const alloydbName = alloydbCluster.displayName;
export const gkeClusterEndpoint = gkeCluster.endpoint;
```

This program sets up a basic AlloyDB cluster and a GKE cluster and deploys the `gke-autoneg-controller` to the GKE cluster using standard configurations. Ensure you replace the placeholders with your own valid GCP project, location, and other necessary configurations. The `pulumi.secret` function keeps the password for the AlloyDB cluster's initial user secure.

Once this code is executed with Pulumi, you will have a fully functioning AlloyDB cluster and a GKE cluster with `gke-autoneg-controller` ready to manage NEGs for your services. The outputs export the AlloyDB cluster's display name and the GKE cluster's endpoint, which you can use to interact with your AlloyDB and Kubernetes resources.