Ansible basics training visudo root ALL=(ALL) ALL %admin ALL=(ALL) ALL ansible ALL=(ALL) NOPASSWD: ALL

create ansible user account and ssh key for the ansible user with no password do a ssh-keygen on each server ssh-keygen

now copy the ssh key the server copy ssh key from your master serverto any of servers you want to run ansible

scp id_rsa.pub ansible@yservername.com:/home/ansible/.ssh/authorized_keys

or

ssh-copy-id ansible@servername (no password)

Also make sure you are using git and github or bitbucket to version control your files.