Multi-line Output for Terraform

output.tf

output "SSH Config" {
  value = <<SSHCONFIG
  ### START Auto-gen SSH Config for ${random_pet.cluster_id.id} ###

  Host ${random_pet.cluster_id.id}-bastion
    User          core
    Hostname      ${aws_instance.bastion.public_ip}
    IdentityFile  ~/.ssh/${random_pet.cluster_id.id}.key

  Host ${random_pet.cluster_id.id}-agent
    User          core
    Hostname      ${aws_instance.mesos_private_agent.0.private_ip}
    ProxyCommand  ssh ${random_pet.cluster_id.id}-bastion -W %h:%p 2> /dev/null
    IdentityFile  ~/.ssh/${random_pet.cluster_id.id}.key

  Host ${random_pet.cluster_id.id}-master
    User          core
    Hostname      ${aws_instance.mesos_master.0.private_ip}
    ProxyCommand  ssh ${random_pet.cluster_id.id}-bastion -W %h:%p 2> /dev/null
    IdentityFile  ~/.ssh/${random_pet.cluster_id.id}.key

  ### END Auto-gen SSH Config for ${random_pet.cluster_id.id} ###
    SSHCONFIG
}

Thanks for sharing 💪🏻