---
# This playbook purges Ceph
# It removes: packages, configuration files and ALL THE DATA
#
# Use it like this:
# ansible-playbook purge-cluster.yml
#     Prompts for confirmation to purge, defaults to no and
#     doesn't purge the cluster. yes purges the cluster.
#
# ansible-playbook -e ireallymeanit=yes|no purge-cluster.yml
#     Overrides the prompt using -e option. Can be used in
#     automation scripts to avoid interactive prompt.

- name: confirm whether user really meant to purge the cluster
  hosts: localhost

  vars_prompt:
    - name: ireallymeanit
      prompt: Are you sure you want to purge the cluster?
      default: 'no'
      private: no

  tasks:
  - name: exit playbook, if user didn't mean to purge cluster
    fail:
      msg: >
        "Exiting purge-cluster playbook, cluster was NOT purged.
         To purge the cluster, either say 'yes' on the prompt or
         or use `-e ireallymeanit=yes` on the command line when
         invoking the playbook"
    when: ireallymeanit != 'yes'

- name: stop ceph cluster
  hosts:
    - mons
    - osds
    - mdss
    - rgws

  become: yes

  vars:
    osd_group_name: osds
    mon_group_name: mons
    rgw_group_name: rgws
    mds_group_name: mdss

# 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-radosgw

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


  handlers:
  - name: restart machine
    shell: sleep 2 && shutdown -r now "Ansible updates triggered"
    async: 1
    poll: 0
    ignore_errors: true

  - name: wait for server to boot
    local_action: wait_for port=22 host={{ inventory_hostname }} state=started delay=10 timeout=400

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

  tasks:
  - name: check for a device list
    fail:
      msg: "OSD automatic discovery was detected, purge cluster does not support this scenario. If you want to purge the cluster, manually provide the list of devices in group_vars/osds using the devices variable."
    when:
      devices is not defined and
      osd_auto_discovery

  - name: get osd numbers
    shell: "if [ -d /var/lib/ceph/osd ] ; then ls /var/lib/ceph/osd | cut -d '-' -f 2 ; fi"
    register: osd_ids
    changed_when: false

  - name: are we using systemd
    shell: "if [ -d /usr/lib/systemd ] ; then find /usr/lib/systemd/system -name 'ceph*' | wc -l ; else echo 0 ; fi"
    register: systemd_unit_files

# Infernalis
  - name: stop ceph.target with systemd
    service:
      name: ceph.target
      state: stopped
      enabled: no
    when:
      ansible_os_family == 'RedHat' and
      systemd_unit_files.stdout != "0"

  - 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
      systemd_unit_files.stdout != "0" 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
      systemd_unit_files.stdout != "0" 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
      systemd_unit_files.stdout != "0" 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
      systemd_unit_files.stdout == "0"

  - name: stop ceph mons
    command: service ceph stop mon
    when:
      ansible_os_family == 'RedHat' and
      mon_group_name in group_names and
      systemd_unit_files.stdout == "0"

  - name: stop ceph mdss
    command: service ceph stop mds
    when:
      ansible_os_family == 'RedHat' and
      mds_group_name in group_names and
      systemd_unit_files.stdout == "0"

# Ubuntu 14.04
  - name: stop ceph osds on ubuntu
    command: stop ceph-osd id={{ item }}
    failed_when: false
    when:
      ansible_distribution == 'Ubuntu' and
      osd_group_name in group_names
    with_items: "{{ osd_ids.stdout_lines }}"

  - name: stop ceph mons on ubuntu
    command: stop ceph-mon id={{ ansible_hostname }}
    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

  - name: check for anything running ceph
    shell: "ps awux | grep -v grep | grep -q -- ceph-"
    register: check_for_running_ceph
    failed_when: check_for_running_ceph.rc == 0

  - name: get osd data mount points
    shell: "(grep /var/lib/ceph/osd /proc/mounts || echo -n) | awk '{ print $2 }'"
    register: mounted_osd
    changed_when: false

  - name: drop all cache
    shell: "sync && sleep 1 && echo 3 > /proc/sys/vm/drop_caches"
    when:
      osd_group_name in group_names

  - name: umount osd data partition
    shell: umount {{ item }}
    with_items:
     - "{{ mounted_osd.stdout_lines }}"
    when:
     osd_group_name in group_names

  - name: remove osd mountpoint tree
    shell: rm -rf /var/lib/ceph/osd
    register: remove_osd_mountpoints
    failed_when: false
    when:
      osd_group_name in group_names

  - name: remove monitor store and bootstrap keys
    shell: rm -rf /var/lib/ceph/
    failed_when: false
    when:
      mon_group_name in group_names

  - name: is reboot needed
    local_action: shell echo requesting reboot
    notify:
      - restart machine
      - wait for server to boot
      - remove data
    when:
      osd_group_name in group_names and
      remove_osd_mountpoints.rc != 0

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

  - name: remove from 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'

  - name: request data removal
    local_action: shell echo requesting data removal
    notify:
      - remove data