Terraform GKE Node Pool Module

This module handles node pool creation in Google Kubernetes Engine (GKE). One major pain point in maintaining a GKE node pool is that sometimes changes would result in node pool recreation which brings downtime if you don't handle it manually. Google has an instruction documentation on how to do it manually.

This module makes it possible to update everything of a node pool without downtime. It's available in Terraform registry.

Requirements

• Terraform version >= 0.12.
• gcloud and kubectl are installed on or you have network connectivity from the machine where Terraform is executed.
• GOOGLE_CREDENTIALS environment variable has to be configured if gcloud is not installed, reference here.

Features

• autoscaling is enabled
• create_before_destroy is enabled
• Most commonly used arguments are configurable

Usage

module "gke-node-pool" {
  source      = "baozuo/gke-node-pool/google"
  project     = "YOUR-GCP-PROJECT-ID"
  cluster     = "GKE-CLUSTER-NAME"
  location    = "us-central1"
  name_prefix = "my-node-pool"

  # Most arguments are available under this section
  # https://www.terraform.io/docs/providers/google/r/container_node_pool.html
  config      = {
    # Optional configurations
    machine_type = "n1-standard-1"
    disk_size_gb = "200"
  }

  # Other optional configurations
  labels = {
    service = "my-service"
  }
  taints = [
    {
      key    = "service"
      value  = "my-service"
      effect = "NO_SCHEDULE"
    },
  ]
}

Check variables.tf and main.tf for more arguments.