从 ASG 获取私人 IP

Question

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-${var.env}" image_id = data.aws_ami.ubuntu.id # Get image from data instance_type = var.instance_type # use t2.micro ad default security_groups = [var.sg_app.id, var.sg_alb.id] # SG for APP key_name = var.ssh_key # SSH key for connection to EC2 user_data = file("./modules/ec2/shell/apache.sh") # install apache lifecycle { create_before_destroy = true } } # Auto Scaling Group resource "aws_autoscaling_group" "asg" { count = length(var.private_su.net_id) # count numbers of private su.nets name = "ASG-${var.env}-${count.index + 1}" vpc_zone_identifier = [var.private_su.net_id[count.index]] launch_configuration = aws_launch_configuration.asg_conf.name target_group_arns = [var.alb_target.arn] min_size = 1 # Min size of creating EC2 max_size = 1 # Max size of creating EC2 health_check_grace_period = 120 health_check_type = "ELB" force_delete = true lifecycle { create_before_destroy = true } tag { key = "Name" value = "Webserver-ec2-${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

Answer 1

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.