Provisioning

After we define our providers and resources to establish our environment, we use provisioners to deploy and execute code in that environment. You can deploy things like scripts and then use remote-exec to execute them. This is accomplished via SSH, and you can override the connection details as well.

resource "aws_key_pair" "mykey" {
  key_name   = "mykey"
  public_key = file(var.PATH_TO_PUBLIC_KEY)
}

resource "aws_instance" "example1" {
    ami = ${lookup(var.AMIS, var.AWS_REGION)}
    instance_type = "t2.micro"
    key_name      = aws_key_pair.mykey.key_name

    provisioner "file" {
        source = "deploy.sh"
        destination = "/etc/deploy.sh"
    }
    provisioner "remote-exec" {
        inline = [
        "chmod +x /tmp/script.sh",
        "sudo sed -i -e 's/\r$//' /tmp/script.sh",  # Remove the spurious CR characters.
        "sudo /tmp/script.sh",
        ]
    }
    connection {
        user = var.instance_user
        password = var.instance_password
    }
    # or use keys
    connection {
        host        = coalesce(self.public_ip, self.private_ip)
        type        = "ssh"
        user        = var.instance_user
        private_key = file(var.PATH_TO_PRIVATE_KEY)
    }
}