.profile

PBLOC=~/projects/somewhere/addserver.yml
addserver() {
  if [[ -z "$1" ]]; then
    echo "[e] You need to give an IP for this to work. Dont use ssh-agent, since it will have precedence"
  else
    echo "[i] Running setup for new server, be ready to type in your root password"
    echo "[i] Removing and re-adding the known_hosts file"
    ssh-keygen -f "${HOME}/.ssh/known_hosts" -R $1
    ssh-keyscan -t rsa -H $1 >> ~/.ssh/known_hosts
    ansible-playbook ${PBLOC} -u root -i "newserver," --extra-vars="hosts=newserver ansible_ssh_host=$1" -k
    echo "[i] Ssh keys are added, sudoers file change. You can now run your normal playbooks against this server"
  fi
}

addserver.yml

---
- hosts: '{{ hosts }}'

  tasks:
  - name: Create awx user
    user: name=awx comment="Ansible user" shell=/bin/bash

  - name: Make sure we can sudo as awx user
    lineinfile: dest=/etc/sudoers state=present regexp='^awx' line='awx ALL=(ALL) NOPASSWD:ALL'

  - name: Disable requiretty for awx user to support pipelining
    lineinfile: dest=/etc/sudoers state=present regexp='^Defaults:awx' line='Defaults:awx    !requiretty'

  - name: Add authorized_keys
    authorized_key: user=awx
      key="{{ lookup('file','~/.ssh/id_rsa.pub') }}"