CODEWITHSUNDEEP
amazon-web-servicesamazon-ec2terraformautoscaling
O.Yudin
O.Yudin

Reputation: 123

Get Private IP from ASG

I need to output private IP from Auto Scaling Group of EC2 instance that configuration by Terraform. How can i get private IP from ASG?

# Launch config for ASG
resource "aws_launch_configuration" "asg_conf" {
  name            = "ASG-Conf-${var.env}"
  image_id        = data.aws_ami.ubuntu.id                # Get image from data
  instance_type   = var.instance_type                     # use t2.micro ad default
  security_groups = [var.sg_app.id, var.sg_alb.id]        # SG for APP
  key_name        = var.ssh_key                           # SSH key for connection to EC2
  user_data       = file("./modules/ec2/shell/apache.sh") # install apache

  lifecycle {
    create_before_destroy = true
  }
}

# Auto Scaling Group
resource "aws_autoscaling_group" "asg" {
  count                = length(var.private_subnet_id) # count numbers of private subnets
  name                 = "ASG-${var.env}-${count.index + 1}"
  vpc_zone_identifier  = [var.private_subnet_id[count.index]]
  launch_configuration = aws_launch_configuration.asg_conf.name
  target_group_arns    = [var.alb_target.arn]

  min_size         = 1 # Min size of creating EC2
  max_size         = 1 # Max size of creating EC2

  health_check_grace_period = 120
  health_check_type         = "ELB" 
  force_delete              = true  

  lifecycle {
    create_before_destroy = true
  }

  tag {
    key                 = "Name"
    value               = "Webserver-ec2-${count.index + 1}"
    propagate_at_launch = true
  }
}

output {
  # How can i get this???
  value = aws_autoscaling_group.asg.private_ip
}

My infrastructure create 1 EC2 instance in 2 private AZ by ASG and i need output IP from this ASG

Upvotes: 0

Views: 670

Answers (1)

Marcin
Marcin

Reputation: 238537

You need custom data source to get the IPs. But this really does not make much sense as instances in ASG can be changed by AWS at any time, thus making your IPs obsolete.

Upvotes: 2

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