ansible-playbooks/roles/hypervisor/tasks/xen.yml

- name: 'Install Xen related packages'
  apt:
    pkg: '{{ item }}'
    install_recommends: 'no'
    state: 'present'
  with_items:
    - 'xen-linux-system-amd64'
    - 'grub-xen-host'
    - 'bridge-utils'
    - 'debootstrap'
  when: with_xen

- name: 'Add GRUB options for Xen'
  lineinfile:
    dest: '/etc/default/grub'
    regexp: '^GRUB_CMDLINE_XEN_DEFAULT='
    insertafter: '^GRUB_CMDLINE_LINUX='
    line: 'GRUB_CMDLINE_XEN_DEFAULT="dom0_mem={{ xendom0_mem  }}M,max:{{ xendom0_mem }}M dom0_max_vcpus=1 dom0_vcpus_pin {{ xen_grub_opts }}"'
  notify:
    - 'Update GRUB'
  when: with_xen

- name: 'Set Xen hypervisor to boot first'
  command: 'dpkg-divert --divert /etc/grub.d/09_linux_xen --rename /etc/grub.d/20_linux_xen creates=/etc/grub.d/09_linux_xen'
  notify:
    - 'Update GRUB'
  when: with_xen

- name: 'Configure Xend'
  template: 
    src: 'xen/xend-config.sxp.j2'
    dest: '/etc/xen/xend-config.sxp'
    owner: 'root'
    group: 'root'
    mode: '0644'
  when: with_xen

- name: 'Configure Xendomains init script (disable save and restore)'
  lineinfile:
    dest: '/etc/default/xendomains'
    regexp: '{{ item.regexp }}'
    line: '{{ item.line }}'
  with_items:
    - { regexp: '^#?XENDOMAINS_RESTORE=', line: 'XENDOMAINS_RESTORE=false' }
    - { regexp: '^#?XENDOMAINS_SAVE=', line: 'XENDOMAINS_SAVE=' }
  when: with_xen