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Creating the Control Plane

Creating the Control Plane

Learn how to create a primary cluster in Google cloud using Terraform definitions.

We'll cover the following...

GKE cluster specifications

Now we have all the prerequisites. The provider is set to Google, and we have the backend (for the state) pointing to the bucket. We can turn our attention to the GKE cluster itself.

A Kubernetes cluster almost always consists of a control plane and one or more pools of worker nodes. In the case of GKE, those two are separate types of resources. We’ll start with the control plane and move toward worker nodes later.

We can use the google_container_cluster module to create a GKE control plane.

Viewing the control plane file

Let’s look at the contents of the k8s-control-plane.tf file.

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resource "google_container_cluster" "primary" {
  name                     = var.cluster_name
  location                 = var.region
  remove_default_node_pool = true
  initial_node_count       = 1
  min_master_version       = var.k8s_version
  
  resource_labels          = {
    environment            = "development"
    created-by             = "terraform"
    owner                  = "vfarcic"
  }
}

The meaning of some of the fields is probably easy to guess. However, we do have a few names that might not be that obvious and intuitive. Specifically, it might be hard to understand the meaning of remove_default_node_pool and ...