Terraform provisioner

• https://www.terraform.io/language/resources/provisioners/syntax
• https://www.terraform.io/docs/language/resources/provisioners/syntax.html

Provisioners are a Last Resort.

provisioner "file"
provisioner "local-exec"
provisioner "remote-exec"

Example

 resource "aws_instance" "your_web" {
  # ...

  provisioner "local-exec" {
    command = "echo The server's IP address is ${self.private_ip}"
  }
}

Digital Ocean Example

• https://www.digitalocean.com/community/tutorials/how-to-use-ansible-with-terraform-for-configuration-management

 provisioner "remote-exec" {
   inline = ["sudo apt update", "sudo apt install python3 -y", "echo Done!"]

   connection {
     host        = self.ipv4_address
     type        = "ssh"
     user        = "root"
     private_key = file(var.pvt_key)
   }
 }

 provisioner "local-exec" {
   command = "ANSIBLE_HOST_KEY_CHECKING=False ansible-playbook -u root -i '${self.ipv4_address},' --private-key ${var.pvt_key} -e 'pub_key=${var.pub_key}' apache-install.yml"
 }

Related

• Terraform Associate: Explain when to use and not use provisioners and when to use local-exec or remote-exec
• Amazon EC2: user_data or user_data_base64 on aws_instance, aws_launch_template, and aws_launch_configuration.

Errors

• Error: Unsupported block type

See also

• Terraform provisioner, self., local-exec, remote-exec, file
• Terraform resources, Terraform providers, Terraform provisioner, random_password, random_string, null_resource

https://www.terraform.io/language/resources/provisioners/syntax