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Terraform Beginners Track - Microsoft Azure

Prerequisites

  • Any Code Editor (Visual Studio Code or Atom etc)
  • Microsoft Azure Subscription.

Click Here to sign up for an account

  • Hashicorp Terraform installed and added to the PATH
  • A Service Principal is created and given Contributor access

Terraform

Write the code

Write the terraform code to deploy a virtual network.

  • main.tf - This file contains provider and resource blocks
  • variables.tf - This file contains all the variables
  • outputs.tf - This file contains the outputs that will be displayed in the console if the deployment is successful.

Note: These are the standard file names in terraform. You can use any name for a .tf file. Ex: vnet.tf, vars.tf etc.

You can add the Service principal variables in terraform.tfvars file in the format shown below.

client_id = "CLIENTID-OF-THE-APP"
client_secret = "CLIENT-SECRET-OF-THE-APP"
subscription_id = "SUBSCRIPTIONID"
tenant_id = "TENANTID"

This is not a best practice. If you choose to do this, YOU MUST NOT CHECK THIS FILE INTO VERSION CONTROL. I would suggest you to add these as Environment variables. You can refer the terraform-azure authentication process documentation here

You can also provide these credentials at the run time or you can supply the variables for terraform plan and terraform apply

  • *$ terraform plan -var "client_id=CLIENT_ID" -var "client_secret=CLIENT_SECRET" -var "subscription_id=SUBSCRIPTION_ID" -var "tenant_id=TENANT_ID"

Run the terraform commands shown below

  • $ terraform init
  • $ terraform validate
  • $ terraform plan -out=vnet.tfplan
  • $ terraform apply vnet.tfplan

You have to manually type 'yes' to deploy the infrastructure. You can skip the manual intervention with the command "terraform apply -auto-approve"

Once the deployment is done and you have verified the resources in the azure portal, cleanup everything with below command.

  • $ terraform destroy

Again, you have to manually type 'yes' to destroy the infrastructure. You can skip the manual intervention with the command "terraform destroy -auto-approve"