Configure ZFS on Linux on a CentOS system.

zol.yml

#
# A series of Ansible tasks to download and configure zfs on linux
# If this is a HVM on SmartOS using one of the linux images,
# ( e.g.https://images.joyent.com/images?name=centos-7&type=zvol )
# replace the /data ext4 filesystem created by default with a zpool called
# tank, and create tank/data, mounting it to /data
#

---
- name: See if we already have the zfs source repo
  stat:
    path: /etc/yum.repos.d/zfs.repo
  register: stat_result

- name: Download zol RPMs for this version of centos
  get_url:
    url: http://download.zfsonlinux.org/epel/zfs-release.el{{ ansible_distribution_version | replace('.', '_') }}.noarch.rpm
    dest: /tmp
  register: zfs_rpm
  when: stat_result.stat.exists == False

- name: Install zfs source repo package
  package:
    name: "{{ zfs_rpm.dest }}"
    state: present
  when: stat_result.stat.exists == False

- name: Verify the fingerprint
  command:
    cmd: gpg --quiet --with-fingerprint /etc/pki/rpm-gpg/RPM-GPG-KEY-zfsonlinux
  register: gpg
  failed_when: '"C93A FFFD 9F3F 7B03 C310  CEB6 A9D5 A1C0 F14A B620" not in gpg.stdout'

- name: Disable dkms zfs repo
  ini_file:
    path: /etc/yum.repos.d/zfs.repo
    section: zfs
    option: enabled
    value: "0"

- name: Enable zfs-kmod
  ini_file:
    path: /etc/yum.repos.d/zfs.repo
    section: zfs-kmod
    option: enabled
    value: "1"

- name: Install zfs
  package:
    name: zfs
    state: installed

- name: Load the zfs module at boot
  lineinfile:
    path: /etc/modules-load.d/zfs.conf
    line: zfs
    create: yes

- name: Load the zfs module now
  modprobe:
    name: zfs
    state: present

- name: look for SmartOS configuration
  stat:
    path: /etc/cloud/cloud.cfg.d/90_smartos.cfg
  register: smartos_cfg

- name: Remove /data entry from 90_smartos.cfg
  blockinfile:
    path: /etc/cloud/cloud.cfg.d/90_smartos.cfg
    block: |
      mounts:
        - [ vdb, /data, auto, "defaults,nofail" ]
    state: absent
  when: smartos_cfg.stat.exists

- name: Remove /data entry from fstab
  mount:
    src: /dev/vdb
    path: /data
    state: absent
  when: smartos_cfg.stat.exists

- name: Look for a tank zpool
  stat:
    path: /dev/disk/by-label/tank
  register: tank_device

- name: Create a tank zpool
  command:
    cmd: zpool create -f tank /dev/vdb
  when: smartos_cfg.stat.exists and not tank_device.stat.exists

- name: Create tank/data
  zfs:
    name: tank/data
    state: present
    extra_zfs_properties:
      mountpoint: /data
      compression: on
  when: smartos_cfg.stat.exists