danisla / terraform-mig-example

Terraform GCP Managed Instance Group Example

Terraform GCP Managed Instance Group Example

How to create a managed instance group with TCP Load Balancer using Terraform.

Setup

First, configure terraform per the Google Cloud Provider Configuration Reference

Make sure your project name and credentials are exported as variables:

export GOOGLE_PROJECT=$(gcloud config get-value project)
export GOOGLE_CREDENTIALS=$(cat ~/.config/gcloud/terraform-admin.json)

Terraform Apply

Initialize the Terraform workspace:

terraform get

Preview the changes that terraform will make in your project:

terraform plan

Apply the changes:

terraform apply

Show the IP address of the forwarding rule:

terraform output -module mig

Scaling the Instance Group

Edit the terraform.tf file and change the value of mig_size then run terraform plan and terraform apply to scale the group.