Installation

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This page contains detailed instructions for bootstrapping a Google GKE Cluster (K8S) via Terraform.

Installation

We use Terraform and the offical Gruntwork Terraform GKE Module Please visit the pages for a more detail on the setup.

Set Up and Initialize your Terraform Workspace

Clone the Gruntwork GKE module Repository:

git clone https://github.com/gruntwork-io/terraform-google-gke

Switch into the repository directory:

cd terraform-google-gke

Configure Terraform GKE Cluster

For educational reasons, we will not use the Helm resource in this step. Please uncomment the following lines in main.tf:

#resource "helm_release" "nginx" {
# depends_on = [google_container_node_pool.node_pool]
# repository = "https://charts.bitnami.com/bitnami"
# name = "nginx"
# chart = "nginx"
#}

Fill in the required variables in variables.tf based on your needs as example:

variable "project" {
description = "The project ID where all resources will be launched."
type = string
default = "<YOUR-COMPANY-PROJECT-ID>"
}

variable "location" {
description = "The location (region or zone) of the GKE cluster."
type = string
default = "europe-west1"
}

variable "region" {
description = "The region for the network. If the cluster is regional, this must be the same region. Otherwise, it should be the region of the zone."
type = string
default = "europe-west1"
}

variable "cluster_name" {
description = "The name of the Kubernetes cluster."
type = string
default = "rasa-x-test-cluster"
}

variable "cluster_service_account_name" {
description = "The name of the custom service account used for the GKE cluster. This parameter is limited to a maximum of 28 characters."
type = string
default = "rasa-x-test-cluster-sa"
}

Authenticate to GCP

gcloud auth login
gcloud auth application-default login
note

gcloud auth application-default manages your active Application Default Credentials which provide a method to get credentials used in calling Google APIs. Visit Google Cloud SDK documentation to learn more.

Initialize Terraform

Initialize your Terraform workspace, which will download and configure the providers.

terraform init

Plan Terraform Run

Check your Terraform plan before applying it with

terraform plan

If all is correct you will get a rendered execution plan.

Run Terraform to Create a GKE Cluster

terraform apply

At the end of the terraform apply, you should now have a working GKE cluster and kubectl context configured. So let's verify that in the next step!

Deploying NGINX Ingress Controller

We use NGINX Ingress Controller and need to deploy it via helm. Run the following commands:

helm repo add ingress-nginx https://kubernetes.github.io/ingress-nginx
helm repo update
helm -n ingress-nginx install ingress-nginx ingress-nginx/ingress-nginx --create-namespace

After some minutes you should see the Public LoadBalancer IP of the Ingress via:

kubectl -n ingress-nginx get svc ingress-nginx-controller

Example output shows a service with an external IP address that can be used to access the cluster.

Next Steps