Autoscaling using "Ansible-pull" with AWS instances for Master and Slave configuration

I am working with AWS instances currently and want to transfer all the configuration that is currently running on AWS master node to the multiple AWS slave nodes with Ansible only. Slave nodes may be 2 or 3 or may be more. Is it possible with the Ansible-Pull model to automatically scale the AWS instance when the “Utilization” of the slave node goes down or up. ?

How can I assign the AWS Cluster of the Nodes ?