Getting a list of instances in an EC2 auto scale group?

Question

Is there a utility or script available to retrieve a list of all instances from AWS EC2 auto scale group?

I need a dynamically generated list of production instance

Answer 1

for ruby using aws-sdk gem v2 First create ec2 object as this:

ec2 = Aws::EC2::Resource.new(region: 'region', credentials: Aws::Credentials.new('IAM_KEY', 'IAM_SECRET') )

instances = []

ec2.instances.each do |i|
   p "instance id---", i.id
   instances << i.id

end

This will fetch all instance ids in particular region and can use more filters like ip_address.