very simple, and single flat tf file to get NSX-T configured with a sample T1 router and associated logical segments and DFW policy
Step1: install terraform on your chosen linux box
TER_VER=`curl -s https://api.github.com/repos/hashicorp/terraform/releases/latest | grep tag_name | cut -d: -f2 | tr -d \"\,\v | awk '{$1=$1};1'`
wget https://releases.hashicorp.com/terraform/${TER_VER}/terraform_${TER_VER}_linux_amd64.zip
unzip terraform_${TER_VER}_linux_amd64.zip
sudo mv terraform /usr/local/bin/
which terraform
terraform -v
Step2: In the same dir as the main.tf file Initialise the requried NSX-T provider
terraform init
Step3: Validate the plan
terraform plan
Step4: Execute the plan
terraform apply -auto-approve
Step5: Delete the plan (if necessary)
terraform destroy -auto-approve
NOTE: Be sure to check in the Manager portion of the NSX-T UI, as pre NSX-T 3.2, TF uses the management API (not the policy API). In time, Policy API (and UI) will show the TF created objects