Requirements

In order to use this repo you will need installed:

• Terraform (I have tested this configuration using Terraform 0.13)
• GCloud CLI

Once you have the GCloud CLI installed, we will need to enable some APIs that the service account that Terraform will use will need:

gcloud services enable compute.googleapis.com
gcloud services enable servicenetworking.googleapis.com
gcloud services enable cloudresourcemanager.googleapis.com
gcloud services enable container.googleapis.com

Then we will need to first enable the you will also need to create a service account in GCP that is going to be the responsible for creating the cluster:

gcloud iam service-accounts create {service_account_name}

Once the service account has been created, we'll need to give it some permissions:

gcloud projects add-iam-policy-binding {project_name} --member serviceAccount:{service_account_name}@{project_name}.iam.gserviceaccount.com --role roles/container.admin
gcloud projects add-iam-policy-binding {project_name} --member serviceAccount:{service_account_name}@{project_name}.iam.gserviceaccount.com --role roles/compute.admin
gcloud projects add-iam-policy-binding {project_name} --member serviceAccount:{service_account_name}@{project_name}.iam.gserviceaccount.com --role roles/iam.serviceAccountUser
gcloud projects add-iam-policy-binding {project_name} --member serviceAccount:{service_account_name}@{project_name}.iam.gserviceaccount.com --role roles/resourcemanager.projectIamAdmin

After this, we will need to retrieve the service account keyfile that we are going to be using to authenticate with GCP. For that run:

gcloud iam service-accounts keys create terraform-gke-keyfile.json --iam-account={service_account_name}@{project_name}.iam.gserviceaccount.com

This is going to generate a terraform-gke-keyfile.json file that we will pass to the terraform configuration through the credentials variable in the variables.auto.tfvars). You will also need to populate the service_account variable on the same file with {service_account_name}@{project_name}.iam.gserviceaccount.com.

NOTE: Do not push this file to any repository as it will give you access to GCP!

Create cluster

Once all has been set, you just need to run:

terraform init

This will download the different Terraform providers needed to create the resources in GCP. To see the resources that are going to be created:

terraform plan

And finally, to create the resources:

terraform apply

If multiple people are going to use the same repo to create the same resources, the usage of Terraform Cloud is recommended.