How Do I Set Unique, Descriptive Hostnames for AWS Auto Scaled Instances?

My ASG assigns scaled nodes the aws:autoscaling:groupName to each Instance Name. This yields multiple instances with the same Instance Name.

For example:

To avoid naming collisions, these scaled instances default to IP name for Hostname type.

For example:

How can I configure my launch template to provide unique hostnames for the auto-scaled EC2 instances, so that they include the ASG name in the hostname without defaulting to the IP address.

For example:

• dev-test-my-ASG-ip-192-168-10-123.ec2.internal (A combination of ASG and IP Address)
• dev-test-my-ASG-1728343 (A combination of ASG and Random Hash)

I expect a method to create unique, descriptive names for the scaled nodes.

To change the hostname in the OS, you can follow this documentation

test if this works with your other software.

If you are looking to do this for an Auto Scaling Group, I would use something like the USERDATA section of the EC2 template and have something like the following:

#!/bin/bash
echo "preserve_hostname: true">>/etc/cloud/cloud.cfg
MY_HOSTNAME=dev-test-my-ASG-$RANDOM    
hostnamectl set-hostname $MY_HOSTNAME
echo "HOSTNAME=$MY_HOSTNAME">>/etc/sysconfig/network
echo "127.0.0.1   $MY_HOSTNAME $MY_HOSTNAME.localdomain localhost4 localhost4.localdomain4">/etc/hosts
echo "::1         localhost6 localhost6.localdomain6">>/etc/hosts

May have to issue a reboot command at the end of this, but see if it works without it.