# Copyright (c) 2018 Huawei Technologies Co., Ltd. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

---
- name: clean the volume group of lvm
  shell:
    _raw_params: |

      # _clean_lvm_volume_group removes all default LVM volumes
      #
      # Usage: _clean_lvm_volume_group $vg
      function _clean_lvm_volume_group {
          local vg=$1

          # Clean out existing volumes
          sudo lvremove -f $vg
      }

      # _remove_lvm_volume_group removes the volume group
      #
      # Usage: _remove_lvm_volume_group $vg
      function _remove_lvm_volume_group {
          local vg=$1

          # Remove the volume group
          sudo vgremove -f $vg
      }

      # _clean_lvm_backing_file() removes the backing file of the
      # volume group
      #
      # Usage: _clean_lvm_backing_file() $backing_file
      function _clean_lvm_backing_file {
          local backing_file=$1

          # If the backing physical device is a loop device, it was probably setup by DevStack
          if [[ -n "$backing_file" ]] && [[ -e "$backing_file" ]]; then
              local vg_dev
              vg_dev=$(sudo losetup -j $backing_file | awk -F':' '/'.img'/ { print $1}')
              if [[ -n "$vg_dev" ]]; then
                  sudo losetup -d $vg_dev
              fi
              rm -f $backing_file
          fi
      }

      # clean_lvm_volume_group() cleans up the volume group and removes the
      # backing file
      #
      # Usage: clean_lvm_volume_group $vg
      function clean_lvm_volume_group {
          local vg=$1

          _clean_lvm_volume_group $vg
          _remove_lvm_volume_group $vg
          # if there is no logical volume left, it's safe to attempt a cleanup
          # of the backing file
          if [[ -z "$(sudo lvs --noheadings -o lv_name $vg 2>/dev/null)" ]]; then
              _clean_lvm_backing_file {{ opensds_work_dir }}/volumegroups/${vg}.img
          fi
      }

      clean_lvm_volume_group {{opensds_volume_group}}

  args:
    executable: /bin/bash
  become: true
  when: enabled_backend == "lvm"
  ignore_errors: yes

- name: stop cinder-standalone service
  shell: docker-compose down
  become: true
  args:
    chdir: "{{ cinder_data_dir }}/cinder/contrib/block-box"
  when: enabled_backend == "cinder"
  ignore_errors: yes

- name: clean the volume group of cinder
  shell:
    _raw_params: |

      # _clean_lvm_volume_group removes all default LVM volumes
      #
      # Usage: _clean_lvm_volume_group $vg
      function _clean_lvm_volume_group {
          local vg=$1

          # Clean out existing volumes
          sudo lvremove -f $vg
      }

      # _remove_lvm_volume_group removes the volume group
      #
      # Usage: _remove_lvm_volume_group $vg
      function _remove_lvm_volume_group {
          local vg=$1

          # Remove the volume group
          sudo vgremove -f $vg
      }

      # _clean_lvm_backing_file() removes the backing file of the
      # volume group
      #
      # Usage: _clean_lvm_backing_file() $backing_file
      function _clean_lvm_backing_file {
          local backing_file=$1

          # If the backing physical device is a loop device, it was probably setup by DevStack
          if [[ -n "$backing_file" ]] && [[ -e "$backing_file" ]]; then
              local vg_dev
              vg_dev=$(sudo losetup -j $backing_file | awk -F':' '/'.img'/ { print $1}')
              if [[ -n "$vg_dev" ]]; then
                  sudo losetup -d $vg_dev
              fi
              rm -f $backing_file
          fi
      }

      # clean_lvm_volume_group() cleans up the volume group and removes the
      # backing file
      #
      # Usage: clean_lvm_volume_group $vg
      function clean_lvm_volume_group {
          local vg=$1

          _clean_lvm_volume_group $vg
          _remove_lvm_volume_group $vg
          # if there is no logical volume left, it's safe to attempt a cleanup
          # of the backing file
          if [[ -z "$(sudo lvs --noheadings -o lv_name $vg 2>/dev/null)" ]]; then
              _clean_lvm_backing_file {{ cinder_data_dir }}/${vg}.img
          fi
      }

      clean_lvm_volume_group {{cinder_volume_group}}

  args:
    executable: /bin/bash
  become: true
  when: enabled_backend == "cinder"
  ignore_errors: yes