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

---

# TODO: Split tasks into distribution appropriate files
# avoid running/skipping tasks entirely by not including them

# 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 (EPEL 7)
  yum:
    name: "http://download.zfsonlinux.org/epel/zfs-release.el7_7.noarch.rpm"
    state: present
  when: ('zfs-release' not in ansible_facts.packages) and ((ansible_distribution in ["CentOS" , "Red Hat Enterprise Linux" ]) and (ansible_distribution_major_version == "7"))

- name: install zfs-release package (EPEL 8)
  yum:
    name: "http://download.zfsonlinux.org/epel/zfs-release.el8_1.noarch.rpm"
    state: present
  when: ('zfs-release' not in ansible_facts.packages) and ((ansible_distribution in ["CentOS" , "Red Hat Enterprise Linux" ]) and (ansible_distribution_major_version == "8"))

- name: install zfs-release package (Fedora)
  dnf:
    name: "http://download.zfsonlinux.org/fedora/zfs-release.fc31.noarch.rpm"
    state: present
  when: ('zfs-release' not in ansible_facts.packages) and (ansible_distribution in ["Fedora"] and not is_atomic)

- name: install ZFS (Ubuntu)
  package:
    name: "{{ UBUNTU_ZFS_PKGS | difference(ansible_facts.packages) }}"
    state: present
  when: ansible_distribution in ["Ubuntu"]

- name: install zfs and dkms
  package:
    name: "{{ EL_ZFS_PKGS | difference(ansible_facts.packages) }}"
    state: present
  register: zfs_installed
  when: ansible_distribution in ["CentOS" , "Red Hat Enterprise Linux", "Fedora" ] and 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 20% of each host, depends on consistency between hosts - inconsistency leads to disproportionate allocations
- name: set zfs_arc_max to 20% 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: check for data pool
  command: "zpool list"
  register: pools
  #ignore_errors: true
  changed_when: pools.stdout.find('data') != -1

- 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: not pools.changed and ('worker' in inventory_hostname)