---
# Copyright 2019 Red Hat, Inc.
# 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.


# "backup_and_restore" will search for and load any operating system variable file

# found within the "vars/" path. If no OS files are found the task will skip.
- name: Gather variables for each operating system
  include_vars: "{{ item }}"
  with_first_found:
    - skip: true
      files:
        - "{{ ansible_facts['distribution'] | lower }}-{{ ansible_facts['distribution_version'] | lower }}.yml"
        - "{{ ansible_facts['distribution'] | lower }}-{{ ansible_facts['distribution_major_version'] | lower }}.yml"
        - "{{ ansible_facts['os_family'] | lower }}-{{ ansible_facts['distribution_major_version'] | lower }}.yml"
        - "{{ ansible_facts['distribution'] | lower }}.yml"
        - "{{ ansible_facts['os_family'] | lower }}-{{ ansible_facts['distribution_version'].split('.')[0] }}.yml"
        - "{{ ansible_facts['os_family'] | lower }}.yml"
  tags:
    - always

- name: Install required packages for ReaR
  package:
    name: "{{ tripleo_backup_and_restore_rear_packages }}"
    state: present
  tags:
    - bar_setup_rear

- name: Remove ReaR rpm default cron programming
  file:
    path: /etc/cron.d/rear
    state: absent
  when: tripleo_backup_and_restore_remove_default_cronjob | bool
  tags:
    - bar_setup_rear

- name: Get local hostname
  command: hostname
  register: tripleo_backup_and_restore_hostname
  when: tripleo_backup_and_restore_hostname is undefined
  tags:
    - bar_setup_rear

- name: Set bootstrap nodeid
  register: tripleo_backup_and_restore_bootstrap_nodeid
  command: |
    hiera -c {{ tripleo_backup_and_restore_hiera_config_file }}  'mysql_short_bootstrap_node_name'
  tags:
    - bar_setup_rear

- name: List enabled services by node
  register: tripleo_backup_and_restore_enabled_services
  command: |
    hiera -c {{ tripleo_backup_and_restore_hiera_config_file }} 'service_names'
  tags:
    - bar_setup_rear

- name: Calculate exclude paths
  set_fact:
    tripleo_backup_and_restore_exclude_paths:
      - "{{ tripleo_backup_and_restore_exclude_paths_common }}"
      - "{{ (tripleo_backup_and_restore_enabled_services.stdout is search('nova_compute')) |
         ternary(tripleo_backup_and_restore_exclude_paths_compute, []) }}"
      - "{{ (tripleo_backup_and_restore_bootstrap_nodeid.stdout != tripleo_backup_and_restore_hostname.stdout and
            tripleo_backup_and_restore_enabled_services.stdout is search('pacemaker') and
            tripleo_backup_and_restore_enabled_services.stdout is search('mysql') and
            tripleo_backup_and_restore_exclude_paths_controller_non_bootstrapnode|bool) |
        ternary(tripleo_backup_and_restore_exclude_paths_controller, []) }}"
  tags:
    - bar_setup_rear

- name: Check backup server IP
  command: ping -c 1 '{{ tripleo_backup_and_restore_server }}'
  when: not (tripleo_backup_and_restore_skip_server_test | bool)
  tags:
    - bar_setup_rear

- name: Generate ReaR config file
  template:
    src: local.conf.j2
    dest: /etc/rear/local.conf
    owner: root
    group: root
    mode: '0644'
    backup: true
  tags:
    - bar_setup_rear

- name: Generate ReaR rescue file
  template:
    src: rescue.conf.j2
    dest: /etc/rear/rescue.conf
    owner: root
    group: root
    mode: '0644'
    backup: true
  tags:
    - bar_setup_rear

- name: Load rear config
  slurp:
    src: /etc/rear/local.conf
  register: rear_config
  tags:
    - bar_setup_rear

- name: Extract OUTPUT_URL from rear config
  set_fact:
    output_url: "{{ rear_config.content | b64decode | regex_findall('OUTPUT_URL=(.+)') | first }}"
  tags:
    - bar_setup_rear

- name: Check if this is a SFTP backup
  set_fact:
    sftp_backup: "{{ output_url is search ('sftp://') }}"
  tags:
    - bar_setup_rear

- name: Extract the SFTP hostname
  set_fact:
    sftp_host: "{{ output_url | regex_search('(?<=@)(.*?)(?=/)') }}"
  when: sftp_backup
  tags:
    - bar_setup_rear

- name: Retrieve host ssh fingerprint
  shell: "ssh-keyscan -H {{ sftp_host }} >> ~/.ssh/known_hosts"
  when: sftp_backup
  tags:
    - bar_setup_rear

- name: Is this machine a ceph node?
  stat:
    path: /var/lib/ceph
  register: varlibceph_dir
  tags:
    - bar_setup_rear

- name: Get the directory where /var/lib/ceph is mounted on
  shell: |
    set -o pipefail
    df /var/lib/ceph | grep -v Filesystem | awk '{print $6}'
  register: tripleo_backup_and_restore_ceph_dir
  when: varlibceph_dir.stat.exists
  tags:
    - bar_setup_rear

- name: Get the device where /var/lib/ceph is mounted on
  shell: |
    set -o pipefail
    df /var/lib/ceph | grep -v Filesystem | awk '{print $1}'
  register: tripleo_backup_and_restore_ceph_device
  when: varlibceph_dir.stat.exists
  tags:
    - bar_setup_rear

- name: Get the filesystem format of the device where /var/lib/ceph is mounted on
  shell: |
    set -o pipefail
    grep {{ tripleo_backup_and_restore_ceph_device.stdout }} /etc/mtab | grep '{{ tripleo_backup_and_restore_ceph_dir.stdout }} ' | awk '{print $3}'
  register: tripleo_backup_and_restore_ceph_device_format
  when: varlibceph_dir.stat.exists
  tags:
    - bar_setup_rear

- name: Program a script that will trigger during restore backuping /var/lib/ceph if it exists just before restore
  copy:
    dest: /usr/share/rear/setup/default/011_backup_ceph.sh
    content: |
      echo "Taking a fresh ceph data backup if this controller has co-located cephs"
      mount -t {{ tripleo_backup_and_restore_ceph_device_format.stdout }} {{ tripleo_backup_and_restore_ceph_device.stdout }} /mnt/local
      cd /mnt/local
      [ -d "var/lib/ceph" ] && tar cvfz /tmp/ceph.tar.gz var/lib/ceph --xattrs --xattrs-include='*.*' --acls
      cd /
      umount {{ tripleo_backup_and_restore_ceph_device.stdout }}
  when: varlibceph_dir.stat.exists
  tags:
    - bar_setup_rear

- name: Program a script that will trigger during restoration to restore /var/lib/ceph backup after a full recovery
  copy:
    dest: /usr/share/rear/wrapup/default/501_restore_ceph.sh
    content: |
      echo "Restoring ceph backup if it exists"
      if [ -f "/tmp/ceph.tar.gz" ]; then
        rm -rf /mnt/local/var/lib/ceph/*
        tar xvC /mnt/local -f /tmp/ceph.tar.gz var/lib/ceph --xattrs --xattrs-include='*.*'
      fi
  when: varlibceph_dir.stat.exists
  tags:
    - bar_setup_rear