You are a DevOps engineer at an organization that is moving their configuration management to Infrastructure as Code (IaC) using Terraform. The networking team wants to move to managing their GCP VPCs and subnets with Terraform, but is concerned that maintaining separate code bases for development and production networks would lead to the environments not having the same configurations. You will create a single Terraform module and build both production and development VPCs using that module. This way, the environments will remain mirrored, and managing changes will be transparent and auditable.
Learning Objectives
Successfully complete this lab by achieving the following learning objectives:
- Create a ‘networking’ Module and Use It to Create a Small Development VPC
- Create a
terraformdirectory to work in. - Create a
modules/networkingdirectory, and create amain.tfinside of it. - Define variables for
environment,cidr_range,regionsandsubnet_size. - Create a
localsblock and use thesplit(),element(),length(), andtonumber()Terraform functions to calculate thenewbitsvalue for thecidrsubnet()function argument. - Create a
google_compute_networkresource. - Create a
google_compute_subnetworkresource. Use thecountargument to create a subnet in each region in theregionsvariable. Use thecidrsubnet()function to calculate theip_cidr_rangebased on thecidr_rangevariable. - In the
terraformdirectory, create adevfolder containing amain.tffile. - Create a
terraformblock and amodulereferencing themodules/networkingcode. Set theenvironmenttodev, thecidr_rangeto10.10.0.0/24,regionsto["us-central1", "us-east1"], andsubnet_sizeto28. - Execute
terraform init. - Execute
terraform apply.
- Create a
- Using the Same Module, Create a Production VPC with a Larger CIDR Block and More Subnets
- In the
terraformdirectory, create aprodfolder containing amain.tffile. - Create a
terraformblock and amodulereferencing themodules/networkingcode. Set theenvironmenttoprod, thecidr_rangeto10.0.0.0/8,regionsto["us-central1", "us-east1", "us-east4", "us-west1"], andsubnet_sizeto24. - Execute
terraform init. - Execute
terraform apply.
- In the
