This is an example Terraform used to spin up Jenkins via Chef Habitat, we wrote about it on our blog.
Below is an example tfvars file that could be used to spin up the infra.
jenkins_master_ami = "ami-a4dc46db"
jenkins_key_name = ""
jenkins_vpc_id = "<VPC ID>"
jenkins_master_subnet_id = "<Public subnet in the same VPC>"
jenkins_tag_customer = "opensource"
jenkins_tag_project = "release"