---
# This playbook purges Ceph
# It removes: packages, configuration files and ALL THE DATA

- name: stop ceph cluster
  hosts:
    - mons
    - osds
    - mdss
  become: yes

  vars:
# When set to true both groups of packages are purged.
# This can cause problem with qemu-kvm
    purge_all_packages: true

# When set to true and raw _multi_journal is used then journal disk are also zapped
    zap_journal_disks: true

    ceph_packages:
      - ceph
      - ceph-common
      - ceph-fs-common
      - ceph-fuse
      - ceph-mds
      - ceph-release

    ceph_remaining_packages:
      - libcephfs1
      - librados2
      - libradosstriper1
      - librbd1
      - python-cephfs
      - python-rados
      - python-rbd


  tasks:
  - name: get osd numbers
    shell: ls /var/lib/ceph/osd | cut -d "-" -f 2
    register: osd_ids
    changed_when: false
    when:
     osd_group_name in group_names

# Infernalis
  - name: stop ceph.target with systemd
    service:
      name: ceph.target
      state: stopped
      enabled: no
    when:
      ansible_os_family == 'RedHat' and
      ceph_stable_release == 'infernalis'

  - name: stop ceph-osd with systemd
    service:
      name: ceph-osd@{{item}}
      state: stopped
      enabled: no
    with_items: "{{ osd_ids.stdout_lines }}"
    when:
      ansible_os_family == 'RedHat' and
      ceph_stable_release == 'infernalis' and
      osd_group_name in group_names

  - name: stop ceph mons with systemd
    service: 
      name: ceph-mon@{{ ansible_hostname }} 
      state: stopped
      enabled: no
    when:
      ansible_os_family == 'RedHat' and
      ceph_stable_release == 'infernalis' and
      mon_group_name in group_names 

  - name: stop ceph mdss with systemd
    service: 
      name: ceph-mds@{{ ansible_hostname }} 
      state: stopped
    when:
      ansible_os_family == 'RedHat' and
      ceph_stable_release == 'infernalis' and
      mds_group_name in group_names 

# before infernalis
  - name: stop ceph osds
    command: service ceph stop osd
    when:
      ansible_os_family == 'RedHat' and
      osd_group_name in group_names and
      ceph_stable_release != 'infernalis'

  - name: stop ceph mons
    command: service ceph stop mon
    when:
      ansible_os_family == 'RedHat' and
      mon_group_name in group_names and
      ceph_stable_release != 'infernalis'

  - name: stop ceph mdss
    command: service ceph stop mds
    when:
      ansible_os_family == 'RedHat' and
      mds_group_name in group_names and
      ceph_stable_release != 'infernalis'

# Ubuntu 14.04
  - name: stop ceph osds on ubuntu
    command: stop ceph-osd-all
    failed_when: false
    when:
      ansible_distribution == 'Ubuntu' and
      osd_group_name in group_names

  - name: stop ceph mons on ubuntu
    command: stop ceph-mon-all
    failed_when: false
    when:
      ansible_distribution == 'Ubuntu' and
      mon_group_name in group_names
  
  - name: stop ceph mdss on ubuntu
    command: stop ceph-mds-all
    failed_when: false
    when:
      ansible_distribution == 'Ubuntu' and
      mds_group_name in group_names

# rc is 2 if file not found, so no mount point, so no error
  - name: get osd data mount points
    shell: ls /var/lib/ceph/osd
    register: mounted_osd
    changed_when: false
    failed_when: mounted_osd.rc != 0 and mounted_osd.rc != 2
    when:
     osd_group_name in group_names

  - name: umount osd data partition
    shell: umount /var/lib/ceph/osd/{{ item }}
    failed_when: false
    with_items:
     - "{{ mounted_osd.stdout_lines }}"
    when:
     osd_group_name in group_names

  - name: zap osd disks
    shell: ceph-disk zap "{{ item }}"
    with_items: devices
    when:
     osd_group_name in group_names

  - name: zap journal devices
    shell: ceph-disk zap "{{ item }}"
    with_items: "{{ raw_journal_devices|default([])|unique }}"
    when:
      osd_group_name in group_names and
      raw_multi_journal and
      zap_journal_disks 

  - name: purge ceph packages with yum
    yum:
      name: "{{ item }}"
      state: absent
    with_items:
      - "{{ ceph_packages }}"
    when:
      ansible_pkg_mgr == 'yum'

  - name: purge ceph packages with dnf
    dnf:
      name: "{{ item }}"
      state: absent
    with_items:
      - "{{ ceph_packages }}"
    when:
      ansible_pkg_mgr == 'dnf'

  - name: purge ceph packages with apt
    apt:
      name: "{{ item }}"
      state: absent
    with_items:
      - "{{ ceph_packages }}"
    when:
      ansible_pkg_mgr == 'apt'

  - name: purge remaining ceph packages with yum
    yum:
      name: "{{ item }}"
      state: absent
    with_items:
      - "{{ ceph_remaining_packages }}"
    when:
      ansible_pkg_mgr == 'yum' and
      purge_all_packages == true

  - name: purge remaining ceph packages with dnf
    dnf:
      name: "{{ item }}"
      state: absent
    with_items:
      - "{{ ceph_remaining_packages }}"
    when:
      ansible_pkg_mgr == 'dnf' and
      purge_all_packages == true

  - name: purge remaining ceph packages with apt
    apt:
      name: "{{ item }}"
      state: absent
    with_items:
      - "{{ ceph_remaining_packages }}"
    when:
      ansible_pkg_mgr == 'apt' and
      purge_all_packages == true

  - name: remove config
    file:
     path: /etc/ceph
     state: absent

  - name: remove data
    file:
     path: /var/lib/ceph
     state: absent

  - name: remove logs
    file:
     path: /var/log/ceph
     state: absent

  - name: remove form SysV
    shell: "update-rc.d -f ceph remove"
    when:
      ansible_distribution == 'Ubuntu'

  - name: remove Upstart nad SysV files
    shell: "find /etc -name '*ceph*' -delete"
    when:
      ansible_distribution == 'Ubuntu'

  - name: remove Upstart and apt logs and cache
    shell: "find /var -name '*ceph*' -delete"
    when:
      ansible_distribution == 'Ubuntu'