Terraform - Referencing a subnet from tfstate file

IRJ

I am trying to create an EC2 instance by referencing a subnet already present in the environment. I would like to use the data from the .tfstate file in S3.

I found this in the terraform manual, but since I have multiple subnets, I am unsure how to specify a specific one

https://www.terraform.io/docs/providers/terraform/d/remote_state.html

resource "aws_instance" "test instance" {
  ami             = "${data.aws_ami.ubuntu.id}"
  instance_type               = var.test.ec2_instance_type
  key_name                    = var.key_pair_name
  subnet_id                   = data.terraform_remote_state.vpc.outputs.subnet_id

  tags {
    Name = "test-instance"
  }
}

IRJ

Ok. I figured it out.

Using the output from above through trial and error this was my answer.

  subnet_id  = data.terraform_remote_state.network_configuration.outputs.mysubnet_name_id

In this example your subnet is named mysubnet_name

stacksofplates

Is any of this in a module?

stacksofplates

What does terraform state list show?

IRJ

@stacksofplates said in Terraform - Referencing a subnet from tfstate file:

What does terraform state list show?

data.aws_ami.launch_configuration_ami
data.terraform_remote_state.network_configuration
aws_launch_configuration.ec2_private_launch_configuration
aws_launch_configuration.ec2_public_launch_configuration
aws_security_group.ec2_private_security_group
aws_security_group.ec2_public_security_group
aws_security_group.elb_security_group

IRJ

Ok. I figured it out.

Using the output from above through trial and error this was my answer.

  subnet_id  = data.terraform_remote_state.network_configuration.outputs.mysubnet_name_id

In this example your subnet is named mysubnet_name