How to provision an GCP GKE cluster using Terraform

To ensure Kubernetes best practices for building infrastructure, we use Terraform to manage the entire lifecycle of infrastruture with IaC. In this guide, you will deploy the below list on GCP:

• 1 VPC test-network
• 1 subnet with 1 primary CIDR range10.111.0.0/18 and 2 secondary CIDR ranges10.111.64.0/18 10.111.128.0/18
• 1 reserved IP range10.111.192.0/24 from test-network for VPC_PEERING internal-managed-services
• 2 Cloud NAT Routers High Availability
• Firewall rules
• 1 Filestore
• 1 Memorystore
• 1 GKE

The architecture will be the below pictures.

[Optional] Enable GCP APIs

This will be used to deploy by Jenkins.

gcloud services enable cloudresourcemanager.googleapis.com --project your_project_id

Provision Infrastructure

Update the configurationsgke.tfvars based on your personal requirements.

Let's get started with Terraform to build a GKE Cluster.

terraform init
terraform plan -var-file gke.tfvars
terraform apply -var-file gke.tfvars

Connecting to the GKE

Now that your cluster is provisioned, use gcloud to retrieve the cluster configuration for kubectl.

gcloud container clusters get-credentials devops-demo-gke --region asia-east1

Testing

Verify kubectl with the command below:

kubectl get svc

Cleanup

To destroy previously-created infrastructure with Terraform, run the command below:

terraform destroy -var-file gke.tfvars