---
- name: Check btrfs installation
  ansible.builtin.shell: |
    command -v btrfs
  become: true # btrfs is located in /usr/sbin, which means root permission is needed.
  changed_when: false
  failed_when: false
  register: "is_btrfs_installed"

- name: Install btrfs
  ansible.builtin.apt:
    name: "btrfs-progs"
    state: "present"
  become: true
  when: is_btrfs_installed.rc != 0

- name: Mount data disk
  block:
    - name: Set hard data disk path
      ansible.builtin.shell: |
        set -o pipefail
        ls -1 /dev/disk/by-id/ata-* | \
        grep -F -e "{{ hardware['disk']['data']['serials'] | join('" -e "') }}" | \
        grep -vE -- '-part[0-9]+$' | \
        sort
      changed_when: false
      register: "data_disk_path"

    - name: Check vmm_hdd filesystem already exists
      ansible.builtin.command: |
        blkid -L {{ hardware['disk']['data']['fs']['label'] }}
      become: true
      changed_when: false
      failed_when: false
      register: "is_data_disk_fs"

    - name: Check disk number
      ansible.builtin.fail:
        msg: "Below 4 disks for RAID10, found {{ data_disk_path.stdout_lines | length }}"
      when: (data_disk_path.stdout_lines | length) < hardware['disk']['data']['fs']['btrfs']['min_devices']

    - name: Set btrfs raid10 volume
      ansible.builtin.shell: |
        mkfs.btrfs -f \
        -L {{ hardware['disk']['data']['fs']['label'] }} \
        -d {{ hardware['disk']['data']['fs']['btrfs']['data_profile'] }} \
        -m {{ hardware['disk']['data']['fs']['btrfs']['metadata_profile'] }} \
        {{ data_disk_path.stdout_lines | join(' ') }}
      become: true
      when:
        - is_data_disk_fs.rc != 0
        - (data_disk_path.stdout_lines | length) >= hardware['disk']['data']['fs']['btrfs']['min_devices']
      changed_when: is_mkfs.rc == 0
      register: "is_mkfs"

    - name: Create mount volume
      ansible.builtin.file:
        path: "{{ hardware['disk']['data']['fs']['mount_point'] }}"
        state: "directory"
        owner: "root"
        group: "root"
        mode: "0711"
      become: true

    - name: Mount btrfs raid10 volume
      ansible.posix.mount:
        path: "{{ hardware['disk']['data']['fs']['mount_point'] }}"
        src: "LABEL={{ hardware['disk']['data']['fs']['label'] }}"
        state: "mounted"
        fstype: "{{ hardware['disk']['data']['fs']['type'] }}"
        opts: "{{ hardware['disk']['data']['fs']['mount_opts'] | join(',') }}"
      become: true

    - name: Set mounted btrfs volume permissions
      ansible.builtin.file:
        path: "{{ hardware['disk']['data']['fs']['mount_point'] }}"
        state: "directory"
        owner: "root"
        group: "root"
        mode: "0711"
      become: true

- name: Mount backup disk
  block:
    - name: Set backup disk path
      ansible.builtin.shell: |
        set -o pipefail
        ls -1 /dev/disk/by-id/ata-* | \
        grep -F -e "{{ hardware['disk']['backup']['serials'] | join('" -e "') }}" | \
        grep -vE -- '-part[0-9]+$' | \
        sort
      changed_when: false
      register: "backup_disk_path"

    - name: Check vmm_hdd filesystem already exists
      ansible.builtin.command: |
        blkid -L {{ hardware['disk']['backup']['fs']['label'] }}
      become: true
      changed_when: false
      failed_when: false
      register: "is_backup_disk_fs"

    - name: Set btrfs volume
      ansible.builtin.shell: |
        mkfs.btrfs -f \
        -L {{ hardware['disk']['backup']['fs']['label'] }} \
        -d {{ hardware['disk']['backup']['fs']['btrfs']['data_profile'] }} \
        -m {{ hardware['disk']['backup']['fs']['btrfs']['metadata_profile'] }} \
        {{ backup_disk_path.stdout_lines | join(' ') }}
      become: true
      when:
        - is_backup_disk_fs.rc != 0
        - (backup_disk_path.stdout_lines | length) >= hardware['disk']['backup']['fs']['btrfs']['min_devices']
      changed_when: is_mkfs.rc == 0
      register: "is_mkfs"

    - name: Create mount volume
      ansible.builtin.file:
        path: "{{ hardware['disk']['backup']['fs']['mount_point'] }}"
        state: "directory"
        owner: "root"
        group: "root"
        mode: "0711"
      become: true

    - name: Mount btrfs volume
      ansible.posix.mount:
        path: "{{ hardware['disk']['backup']['fs']['mount_point'] }}"
        src: "LABEL={{ hardware['disk']['backup']['fs']['label'] }}"
        state: "mounted"
        fstype: "{{ hardware['disk']['backup']['fs']['type'] }}"
        opts: "{{ hardware['disk']['backup']['fs']['mount_opts'] | join(',') }}"
      become: true

    - name: Set mounted btrfs volume permissions
      ansible.builtin.file:
        path: "{{ hardware['disk']['backup']['fs']['mount_point'] }}"
        state: "directory"
        owner: "root"
        group: "root"
        mode: "0711"
      become: true

- name: Verify data disk is mounted
  ansible.builtin.command: |
    mountpoint -q {{ hardware['disk']['data']['fs']['mount_point'] }}
  become: true
  changed_when: false

- name: Verify backup disk is mounted
  ansible.builtin.command: |
    mountpoint -q {{ hardware['disk']['backup']['fs']['mount_point'] }}
  become: true
  changed_when: false

- name: Deploy btrfs scrub service and timer
  ansible.builtin.template:
    src: "{{ hostvars['console']['node']['config_path'] }}/services/systemd/vmm/btrfs/btrfs-scrub-{{ item }}.j2"
    dest: "/etc/systemd/system/btrfs-scrub-{{ item }}"
    owner: "root"
    group: "root"
    mode: "0644"
  loop:
    - "data.service"
    - "data.timer"
    - "backup.service"
    - "backup.timer"
  become: true

- name: Enable auto btrfs scrub
  ansible.builtin.systemd:
    name: "btrfs-scrub-{{ item }}.timer"
    state: "started"
    enabled: true
    daemon_reload: true
  loop:
    - "data"
    - "backup"
  become: true