Difference between revisions of "Create an EC2 Instance with Terraform"

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(Playground)
(Public IP)
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</syntaxhighlight>
 
</syntaxhighlight>
 
Note that even if <code>associate_public_ip_address</code> is explicitly set to "true", if the associated subnet has a <code>map_public_ip_on_launch</code> = true, a public IP will be associated anyway.
 
Note that even if <code>associate_public_ip_address</code> is explicitly set to "true", if the associated subnet has a <code>map_public_ip_on_launch</code> = true, a public IP will be associated anyway.
 +
 +
==Multiple Instances==
 +
 +
<syntaxhighlight lang='text'>
 +
variable "instances" {
 +
  default = "2"
 +
}
 +
 +
resource "aws_instance" "my-instance" {
 +
  count        = "${var.instances}"
 +
  ...
 +
  tags = {
 +
    Name  = "my-instance-${count.index + 1}"
 +
  }
 +
}
 +
</syntaxhighlight>

Revision as of 02:52, 14 November 2019

External

Internal

Overview

EC2 instances can be created, updated and deleted. Instances also support provisioning.

Playground

https://github.com/ovidiuf/playground/tree/master/hashicorp/terraform/simplest-ec2-instance

Terraform Registry ec2-instance Module

https://registry.terraform.io/modules/terraform-aws-modules/ec2-instance/aws/2.8.0

Configuration

provider "aws" {

  profile = "default"
  region  = "us-west-2"
}

resource "aws_instance" "terraform-experiment-01" {

  ami                         = "ami-000000000000000"
  instance_type               = "t2.small"
  subnet_id                   = "subnet-0000000000000000"
  key_name                    = "my-keypair-01"
  security_groups             = ["sg-0000000000000000"]
  associate_public_ip_address = false

  tags = {

    Name = "terraform-experiment-01"
  }
}

Configuration Details

Public IP

If nothing is specified, the instance will get a public IP. To disable allocation of a public address specify:

resource "aws_instance" ... {
  ...
  associate_public_ip_address = false
  ...
}

Note that even if associate_public_ip_address is explicitly set to "true", if the associated subnet has a map_public_ip_on_launch = true, a public IP will be associated anyway.

Multiple Instances

variable "instances" {
  default = "2"
}

resource "aws_instance" "my-instance" {
  count         = "${var.instances}"
  ...
  tags = {
    Name  = "my-instance-${count.index + 1}"
  }
}