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.

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

See also

• Terraform resources, Terraform providers, Terraform provisioner, random_password, random_string, null_resource
• Terraform, OpenTofu, Terrakube.org, Installation, Terraform AWS, Terraform GCP, Terraform commands, Terraform Cloud, Terraform Enterprise (TFE), HCL, HIL, meta-arguments, providers, modules, resource, provisioners, data sources, backends: remote backends, examples, configuration files, state files, variables, types, Terraform Registry, conditionals: depends_on, functions, Blocks, dynamic blocks, errors, Terragrunt, Terraformer, Terratest, Terraform certifications, Terraform map type, Terraform Associate, Terraform: list type, TF_VAR_, TF_LOG, Terraform provider versioning, Terraform Style Conventions, Required version, Terraform plugin, Terraform Named Values, tags, Changelog, tfsec, tflint, Operators, Expressions: for, splat, Debugging, Namespaces, Terraform Landing Zones, CDKTF, Atmos

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