---
- name: Install the 'Development tools' package group
  yum:
    name: "@Development tools"
    state: present

- name: Install dependencies
  yum: name={{ item }} state=present
  with_items:
    - kernel-devel
    - deltarpm

- copy: src=virtualbox_centos.repo dest=/etc/yum.repos.d/virtualbox.repo owner=root group=root mode=0644 force=no

- name: Install VirtualBox
  command: yum install -y VirtualBox-{{ virtualbox_version }}
...