ganeti-ansible/roles/node/tasks/xen.yml

- name: "Set Xen commandline"
  ansible.builtin.lineinfile:
    path: "/etc/default/grub.d/xen.cfg"
    regexp: '^GRUB_CMDLINE_XEN_DEFAULT=.*$'
    line: 'GRUB_CMDLINE_XEN_DEFAULT="dom0_mem=1024M,max:1024M dom0_max_vcpus=2 dom0_vcpus_pin loglvl=all guest_loglvl=all iommu=debug,verbose apic_verbosity=debug ivrs_ioapic[0]=00:14.0" console=com1 com1=115200'
  notify:
    - update grub

- name: "Set CPU pinning from dom0"
  ansible.builtin.replace:
    path: "/etc/xen/xl.conf"
    regexp: '^#vm.cpumask=.*$'
    replace: 'vm.cpumask="2-7"'
  notify:
    - update grub

- name: "Disable ballooning for dom0"
  ansible.builtin.replace:
    path: "/etc/xen/xl.conf"
    regexp: '^#autoballoon=.*$'
    replace: 'autoballoon="0"'
  notify:
    - update grub

- name: "Disable domain saving"
  ansible.builtin.lineinfile:
    path: "/etc/default/xendomains"
    regexp: '^XENDOMAINS_SAVE=.*$'
    line: 'XENDOMAINS_SAVE='
  notify:
    - update grub

- name: "Disable domain restore"
  ansible.builtin.lineinfile:
    path: "/etc/default/xendomains"
    regexp: '^XENDOMAINS_RESTORE=.*$'
    line: 'XENDOMAINS_RESTORE=false'
  notify:
    - update grub

- name: "Get latest kernel"
  ansible.builtin.command:
    cmd: bash -c 'find /boot -name "vmlinuz*" | sort -r | head -1'
  register: latest_kernel
  changed_when: false
  failed_when: latest_kernel.rc != 0

- name: "Symlink to the latest kernel"
  ansible.builtin.file:
    state: link
    src: "{{ latest_kernel.stdout }}"
    dest: "/boot/vmlinuz-3-xenU"

- name: "Get latest initrd"
  ansible.builtin.command:
    cmd: bash -c 'find /boot -name "initrd.img*" | sort -r | head -1'
  register: latest_initrd
  changed_when: false
  failed_when: latest_initrd.rc != 0

- name: "Symlink to initrd"
  ansible.builtin.file:
    state: link
    src: "{{ latest_initrd.stdout }}"
    dest: "/boot/initrd.img-3-xenU"

- name: "Get latest kernel config"
  ansible.builtin.command:
    cmd: bash -c 'find /boot -name "config*" | sort -r | head -1'
  register: latest_config
  changed_when: false
  failed_when: latest_config.rc != 0

- name: "Symlink to kernel config"
  ansible.builtin.file:
    state: link
    src: "{{ latest_config.stdout }}"
    dest: "/boot/config-3-xenU"

- name: "Add Xen block drivers to modules"
  ansible.builtin.lineinfile:
    path: "/etc/initramfs-tools/modules"
    regexp: "xen_blkfront"
    line: "xen_blkfront"
  notify:
    - update initramfs
    - reboot

- name: "Get latest Xen version"
  ansible.builtin.command:
    cmd: bash -c 'find /usr/lib -type d -name "xen-*" | sort -r | head -1'
  register: latest_xen
  changed_when: false
  failed_when: latest_xen.rc != 0

- name: "Link Xen to latest version"
  ansible.builtin.file:
    state: link
    src: "{{ latest_xen.stdout }}"
    dest: /usr/lib/xen