ansibleでansibleをいれるplaybookを作る ref: http://qiita.com/yamasaki-masahide/items/45ef3fd3dd5d535407a3

main.yml

- name: install python (CentOS 6)
  yum: name={{item}} enablerepo=epel state=installed
  with_items:
    - PyYAML
    - python-paramiko
    - python-jinja2
  when: ansible_os_family == 'RedHat' and ansible_distribution_version.split('.')[0]|int == 6
  tags: python

- name: install python26 (CentOS 5)
  yum: name={{item}} enablerepo=epel state=installed
  with_items:
    - python26
    - python26-PyYAML
    - python26-paramiko
    - python26-jinja2
  when: ansible_os_family == 'RedHat' and ansible_distribution_version.split('.')[0]|int == 5
  tags: python

- name: install ansible (CentOS 6)
  shell: |
    git clone git://github.com/ansible/ansible.git &&
    cd ansible &&
    make install
    chdir={{ ansible_cache_dir }} creates=/usr/bin/ansible
  when: ansible_os_family == 'RedHat' and ansible_distribution_version.split('.')[0]|int == 6
  tags: ansible

- name: install ansible (CentOS 5)
  shell: |
    git clone git://github.com/ansible/ansible.git &&
    cd ansible &&
    sed -i 's/^PYTHON=.*/PYTHON=python26/' Makefile  &&
    make install
    chdir={{ ansible_cache_dir }} creates=/usr/bin/ansible
  when: ansible_os_family == 'RedHat' and ansible_distribution_version.split('.')[0]|int == 5
  tags: ansible