key_confi.tf

#generate private key
resource "tls_private_key" "tkey" {
  algorithm   = "RSA"
}
#assigne public openssh to the aws key pair
resource "aws_key_pair" "deployer" {
  key_name   = "deployer-key"
  public_key = tls_private_key.tkey.public_key_openssh
  depends_on=[tls_private_key.tkey]
 }
#use key_name variable in the field of aws_instance's key_name
#if you want to save this key then use this
resource "local_file" "lf" {
  content = tls_private_key.tkey.private_key_pem
  filename= "awskey.pem"
 }
#now this will save in you local system
#if you want to remote-exec the just use this << tls_private_key.tkey.private_key_pem  >> in private_key argument of connection
#or you can use variables
variable "aws_key_pair_name" {
  default = aws_key_pair.deployer.key_name
  }
variable "login_private_key" {
  defautl = tls_private_key.tkey.private_key_pem
  }
#now use this variables in your terraform file