Google Cloud GKE Cluster

Introduction

Create a standardized GKE cluster that is good enough for a bunch of general purpose work.

Usage

The most basic way to create a GKE cluster using the Terraform google_container_cluster resource with worker nodes in the default pool.

provider "google-beta" {
  region = "us-central1"
  zone   = "us-central1-a"
  alias  = "google_beta"
}

locals {
  container_cluster_name = "k8s-1"
  container_cluster_zone = "us-central1-a"
  k8s_version            = "1.14.10-gke.22"
  cluster_type           = "zonal"
  project_id             = "a-project-id"
}

module "gke" {
  source       = "github.com/infrastructure-as-code/terraform-google-gke-cluster"
  name         = local.container_cluster_name
  location     = local.container_cluster_zone
  cluster_type = local.cluster_type
  k8s_version  = local.k8s_version
  project_id   = local.project_id

  remove_default_node_pool = false
  default_node_pool = {
      machine_type = "e2-standard-2"
      disk_type    = "pd-standard"
      disk_size_gb = 100
      preemptible  = true
      count        = 3
  }

  providers = {
    google = google-beta.google_beta
  }
}

Setting the remove_default_node_pool variable to true will remove the default node pool, and create additional pools of workers as defined by the node_pools variable.

provider "google-beta" {
  region = "us-central1"
  zone   = "us-central1-a"
  alias  = "google_beta"
}

locals {
  container_cluster_name = "k8s-1"
  container_cluster_zone = "us-central1-a"
  k8s_version            = "1.14.10-gke.22"
  cluster_type           = "zonal"
  project_id             = "a-project-id"
}

module "gke" {
  source       = "github.com/infrastructure-as-code/terraform-google-gke-cluster"
  name         = local.container_cluster_name
  location     = local.container_cluster_zone
  cluster_type = local.cluster_type
  k8s_version  = local.k8s_version
  project_id   = local.project_id

  remove_default_node_pool = true
  node_pools = [
    {
      name         = "main-pool"
      machine_type = "e2-standard-2"
      disk_type    = "pd-standard"
      disk_size_gb = 100
      preemptible  = true
      count        = 3
    },
  ]

  providers = {
    google = google-beta.google_beta
  }
}

Inputs

Name	Description	Type	Default	Required
cluster_type	regional or zonal cluster	string	n/a	yes
default_node_pool	Nodes in the default node pool	object({ machine_type = string disk_type = string disk_size_gb = number preemptible = bool count = number })	{ "count": 3, "disk_size_gb": 20, "disk_type": "pd-standard", "machine_type": "f1-micro", "preemptible": false }	no
k8s_version	Kubernetes version	string	n/a	yes
location	Cluster region or zone	string	n/a	yes
name	Name of cluster	string	n/a	yes
node_pools	Type of nodes and number for each	list(object({ name = string machine_type = string disk_type = string disk_size_gb = number preemptible = bool count = number }))	[]	no
project_id	Project ID	string	n/a	yes
remove_default_node_pool	Delete the default node pool after the cluster is created	bool	false	no

Outputs

Name	Description
ca_certificate	Kubernetes cluster CA certificate
configure_kubectl	Command to configure credentials for kubectl
endpoint	Kubernetes endpoint

References

1. https://www.terraform.io/docs/providers/google/r/container_cluster.html