---
# This playbook use to migrate activity osd(s) journal to SSD.
#
# You should define `osds_journal_devices` variable for host which osd(s) journal migrate to.
# 
# For example in host_vars/hostname1.yml
#
# osds_journal_devices:
# - device_name: /dev/sdd
#   partitions:
#   - index: 1
#     size: 10G
#     osd_id: 0
#   - index: 2
#     size: 10G
#     osd_id: 1
# - device_name: /dev/sdf
#   partitions:       
#   - index: 1        
#     size: 10G       
#     osd_id: 2       
#
# @param device_name: The full device path of new ssd.
# @param partitions:  The custom partition layout of ssd.
# @param index:  The index of this partition.
# @param size:  The size of this partition.
# @param osd_id: Which osds's journal this partition for.
#
# ansible-playbook migrate-journal-to-ssd.yml
#    The playbook will migrate osd(s) journal to ssd device which you define in host_vars. 

- vars:
    osd_group_name: osds
    journal_typecode: 45b0969e-9b03-4f30-b4c6-b4b80ceff106
    osds_journal_devices: []
  hosts: "{{ osd_group_name }}"
  serial: 1
  tasks:

  - name: get osd(s) if directory stat
    stat:
      path: "/var/lib/ceph/osd/{{ cluster }}-{{ item.1.osd_id }}/journal_uuid"
    register: osds_dir_stat
    with_subelements:
      - "{{ osds_journal_devices }}"
      - partitions

  - name: exit playbook osd(s) is not on this host
    fail:
        msg: exit playbook osd(s) is not on this host
    with_items: 
        osds_dir_stat.results
    when: osds_dir_stat is defined and item.stat.exists == false

  - name: install sgdisk(gdisk)
    package:
      name: gdisk
      state: present
    register: result
    until: result is succeeded
    when: osds_journal_devices is defined

  - name: generate uuid for osds journal
    command: uuidgen
    register: osds
    with_subelements:
      - "{{ osds_journal_devices }}"
      - partitions

  - name: make osd partitions on ssd
    shell: >
      sgdisk --new={{item.item[1].index}}:0:+{{item.item[1].size}} "--change-name={{ item.item[1].index }}:ceph journal" 
      --typecode={{ item.item[1].index }}:{{ journal_typecode }} 
      --partition-guid={{ item.item[1].index }}:{{ item.stdout }} 
      --mbrtogpt -- {{ item.item[0].device_name }}
    with_items:  "{{ osds.results }}"

  - name: stop osd(s) service
    service:
      name: "ceph-osd@{{ item.item[1].osd_id }}"
      state: stopped
    with_items: "{{ osds.results }}"

  - name: flush osd(s) journal
    command: ceph-osd -i {{ item.item[1].osd_id }} --flush-journal --cluster {{ cluster }} 
    with_items: "{{ osds.results }}"
    when: osds_journal_devices is defined

  - name: update osd(s) journal soft link
    command: ln -sf /dev/disk/by-partuuid/{{ item.stdout }} /var/lib/ceph/osd/{{ cluster }}-{{ item.item[1].osd_id }}/journal
    with_items: "{{ osds.results }}"

  - name: update osd(s) journal uuid
    command: echo {{ item.stdout }} > /var/lib/ceph/osd/{{ cluster }}-{{ item.item[1].osd_id }}/journal_uuid
    with_items: "{{ osds.results }}"

  - name: initialize osd(s) new journal 
    command: ceph-osd -i {{ item.item[1].osd_id }} --mkjournal --cluster {{ cluster }}
    with_items: "{{ osds.results }}"

  - name: start osd(s) service
    service:
      name: "ceph-osd@{{ item.item[1].osd_id }}"
      state: started
    with_items: "{{ osds.results }}"