deploy-base/roles/zfs/tasks/main.yml

---

# temporarily added to test zfs role by itself
#- name: check if atomic
#  stat:
#    path: /run/ostree-booted
#  register: ostree
#
#- name: set fact (atomic state)
#  set_fact:
#    is_atomic: "{{ ostree.stat.exists }}"
# end temp additions

- name: install zfs-release package (RHEL/CentOS)
  yum:
    name: "http://download.zfsonlinux.org/epel/zfs-release.el7_5.noarch.rpm"
    state: present
  when: ansible_distribution in ["CentOS" , "Red Hat Enterprise Linux" ]

- name: install zfs-release package (Fedora)
  dnf:
    name: "http://download.zfsonlinux.org/fedora/zfs-release.fc29.noarch.rpm"
    state: present
  when: ansible_distribution in ["Fedora"] and not is_atomic

- name: install zfs and dkms
  package:
    name: "{{ item }}"
    state: present
  with_items:
  - kernel-devel
  - "@Development tools"
  - dkms
  - zfs
  register: zfs_installed
  when: not is_atomic

- name: load zfs module
  modprobe:
    name: zfs
    state: present

- name: add zfs to modules-load.d
  copy:
    dest: "/etc/modules-load.d/zfs.conf"
    content: |
      zfs
  register: zfsload

# does not adjust to 75% of each host, depends on consistency between hosts - inconsistency leads to disproportionate allocations
#- name: set zfs_arc_max to 75% installed memory ({{ zfs_arc_size_bytes }} bytes)
#  lineinfile:
#    path: "/etc/modprobe.d/zfs.conf"
#    regexp: '^options zfs zfs_arc_max='
#    line: 'options zfs zfs_arc_max="{{ zfs_arc_size_bytes }}"'
#    create: yes

- name: import pools
  command: "zpool import -a"
  register: pools
  changed_when: "pools.stderr != 'no pools available to import'"

- zpool_facts: properties='all'

# really bad idempotence in here...
- name: create zpool
  command: "zpool create -f -O compression=lz4 data {{ zfs_disk }} -o ashift=13 -O secondarycache=all"
  when: ansible_zfs_pools is not defined