chore: first commit

roles/zfs/tasks/dataset-ownership.yml

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+---
+# due to Ansible limitations, we cannot loop over a block, so we loop over a distinct tasks file...
+# @see https://stackoverflow.com/a/58911694
+- name: set ownership on dataset mountpoint
+  block:
+    - name: get the mountpoint
+      ansible.builtin.shell: "zfs get -H -o value mountpoint {{ dataset.name }}"
+      register: mountpoint
+      changed_when: false
+    - name: set owner of mountpoints
+      file:
+        path: "{{ mountpoint.stdout }}"
+        owner: "{{ dataset.user | default(main_user) }}"
+        group: "{{ dataset.group | default(main_user) }}"
+        state: directory
+        recurse: true

roles/zfs/tasks/datasets.yml

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+---
+# see: https://docs.ansible.com/ansible/latest/collections/community/general/zfs_module.html
+- name: managing filesystems, volumes, snapshots
+  zfs:
+    name: "{{ item.name }}"
+    state: "{{  item.state }}"
+    extra_zfs_properties: "{{ item.extra_zfs_properties|default(omit) }}"
+    origin: "{{ item.origin|default(omit) }}"
+  with_items: "{{ zfs_datasets }}"
+
+- command:
+    cmd: whoami
+  no_log: true
+  become: false
+  register: main_user
+
+- set_fact:
+    main_user: "{{ main_user.stdout }}"
+  no_log: true
+
+- name: set dataset ownership
+  include_tasks: "./dataset-ownership.yml"
+  loop: "{{ zfs_datasets }}"
+  loop_control:
+    loop_var: dataset

roles/zfs/tasks/delete-pool.yml

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+---
+# due to Ansible limitations, we cannot loop over a block, so we loop over a distinct tasks file...
+# @see https://stackoverflow.com/a/58911694
+- name: prompt the user for confirmation
+  ansible.builtin.pause:
+    prompt: "[IRREVERSIBLE] Are you sure you want to delete zpool {{ zpool.name }}?"
+    echo: yes
+  register: confirmation
+
+- name: deleting zpool
+  ansible.builtin.command: "zpool destroy {{ zpool.name }}"
+  when: confirmation.user_input | lower in ['yes', 'y']

roles/zfs/tasks/install.yml

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+---
+- name: Check if zfs-linux-lts is installed
+  command: pacman -Qi zfs-dkms
+  register: zfs_dkms_installed
+  changed_when: false
+  failed_when: false
+
+- name: Install zfs
+  when: zfs_dkms_installed.stderr
+  block:
+    - name: disable SUDOERS password prompt for makepkg
+      no_log: true
+      lineinfile:
+        dest: /etc/sudoers
+        state: present
+        regexp: "^#?%wheel"
+        line: "%wheel ALL=(ALL) NOPASSWD: ALL"
+        validate: /usr/sbin/visudo -cf %s
+
+    # Note: I successfully tried zfs-linux-lts and zfs-linux-lts-headers, but
+    # the next kernel upgrade failed: cyclic dependency.
+    # Using dkms with the lts linux kernel is a better approach IMO.
+    - name: Install zfs
+      become: false
+      command:
+        cmd: "paru -S --noconfirm zfs-dkms zfs-utils"
+
+    - name: Restore SUDOERS password prompt after yay
+      no_log: true
+      lineinfile:
+        dest: /etc/sudoers
+        state: present
+        regexp: "^#?%wheel"
+        line: "%wheel ALL=(ALL:ALL) ALL"
+        validate: /usr/sbin/visudo -cf %s
+
+- name: check if /etc/hostid is present
+  stat:
+    path: /etc/hostid
+  register: hostid
+  changed_when: false
+
+- name: generate /etc/hostid if not present
+  when: not hostid.stat.exists
+  command: zgenhostid $(hostid)
+
+- name: Check if zrepl is installed
+  command: pacman -Qi zrepl
+  register: zrepl_installed
+  changed_when: false
+  failed_when: false
+
+- name: Install zrepl
+  when: zrepl_installed.stderr
+  block:
+    - name: disable SUDOERS password prompt for makepkg
+      no_log: true
+      lineinfile:
+        dest: /etc/sudoers
+        state: present
+        regexp: "^#?%wheel"
+        line: "%wheel ALL=(ALL) NOPASSWD: ALL"
+        validate: /usr/sbin/visudo -cf %s
+
+    - name: Install zrepl
+      become: false
+      command:
+        cmd: "paru -S --noconfirm zrepl"
+
+    - name: Restore SUDOERS password prompt after paru
+      no_log: true
+      lineinfile:
+        dest: /etc/sudoers
+        state: present
+        regexp: "^#?%wheel"
+        line: "%wheel ALL=(ALL:ALL) ALL"
+        validate: /usr/sbin/visudo -cf %s
+
+- name: Enable zfs services
+  service:
+    name: "{{ item }}"
+    enabled: true
+    state: started
+  loop:
+    - zfs.target
+    - zfs-import.target
+    - zfs-volumes.target
+    - zfs-import-scan.service
+    - zfs-volume-wait.service
+# Please note /etc/zfs/zpool.cache should not be present, as it is deprecated
+# and we are using zfs-import-scan.service, which rely on blkid.

roles/zfs/tasks/main.yml

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+---
+- name: Install ZFS
+  include_tasks: install.yml
+
+- name: Configure Zpools
+  include_tasks: pools.yml
+
+- name: "Setup ZFS datasets: filesystems, snapshots, volumes"
+  include_tasks: datasets.yml

roles/zfs/tasks/pools.yml

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+---
+# tasks file for zfs management
+# Based on: https://github.com/mrlesmithjr/ansible-zfs/blob/master/tasks/manage_zfs.yml
+# Expected variables in your inventory: zfs_pools.
+
+- name: checking existing zpool(s)
+  ansible.builtin.shell: "zpool list -H -o name"
+  changed_when: false
+  register: current_zp_state
+  check_mode: no
+  when: zfs_pools is defined
+
+- name: gather zpool status
+  ansible.builtin.shell: zpool status
+  changed_when: false
+  register: zpool_devices
+  when: zfs_pools is defined
+
+- name: creating basic zpool(s)
+  ansible.builtin.command: "zpool create {{ '-o '+ item.options.items() |map('join', '=') | join (' -o ') if item.options is defined else '' }} {{ item.name }} {{ item.devices|join (' ') }}"
+  with_items: "{{ zfs_pools }}"
+  when:
+    - zfs_pools is defined
+    - item.type == "basic"
+    - item.name not in current_zp_state.stdout
+    - item.state == "present"
+    - item.devices[0] not in zpool_devices.stdout
+
+- name: creating mirror/zraid zpool(s)
+  ansible.builtin.command: "zpool create {{ '-o '+ item.options.items() |map('join', '=') | join (' -o ') if item.options is defined else '' }} {{ item.name }} {{ item.type }} {{ item.devices|join (' ') }}"
+  with_items: "{{ zfs_pools }}"
+  when:
+    - zfs_pools is defined
+    - item.type != "basic"
+    - item.name not in current_zp_state.stdout
+    - item.state == "present"
+    - item.devices[0] not in zpool_devices.stdout
+
+- name: deleting zpool(s) with care
+  include_tasks: "./delete-pool.yml"
+  when:
+    - zfs_pools is defined
+    - zpool.name in current_zp_state.stdout_lines
+    - zpool.state == "absent"
+  loop: "{{ zfs_pools }}"
+  loop_control:
+    loop_var: zpool