---
# This playbook backups the odroid docker containers.
- name: Backup odroid
  hosts: all
  gather_facts: true

  tasks:
    - name: Backup odroid
      block:
        - include_vars: vars/common/mattermost.yaml
        - include_vars: vars/odroid/variable.yaml

        - name: Check if directories exist
          stat:
            path: "{{ backup_dir }}/{{ item }}"
          register: dirs
          loop: "{{ systems }}"

        - name: Create not existing directories
          file:
            path: "{{ backup_dir }}/{{ item.item }}"
            state: directory
            mode: 0755
            group: chris
            owner: chris
          when: item.stat.exists == false
          with_items: "{{ dirs.results }}"
          loop_control:
            label: "{{ item.item }}"

        - name: Backup container volumes
          shell: docker run --rm -v {{ backup_dir }}/{{ item.value.container }}:/backup --volumes-from {{ item.value.container }} busybox tar cvfz /backup/{{ item.key }}-{{ ansible_date_time.iso8601_basic_short }}.tar.gz {{ item.value.path }}
          loop: "{{ lookup('dict', volumes) }}"
          loop_control:
            label: "{{ item.key }}"

        - name: Change ownership of volume backups
          file:
            path: "{{ backup_dir }}/{{ item.value.container }}/{{ item.key }}-{{ ansible_date_time.iso8601_basic_short }}.tar.gz"
            owner: chris
            group: chris
          become: yes
          become_method: sudo
          become_user: root
          loop: "{{ lookup('dict', volumes) }}"
          loop_control:
            label: "{{ item.key }}"

        - name: Backup mysql databases
          shell: docker exec {{ item }}-db mysqldump -u{{ item }} -p{{ lookup('vars', item ~ '-password') }} {{ item }} > {{ backup_dir }}/{{ item }}/db-{{ ansible_date_time.iso8601_basic_short }}.sql
          loop: "{{ mysql_databases }}"

        - name: Backup postgres databases
          shell: docker exec {{ item }}-db pg_dump -U {{ item }} {{ item }} > {{ backup_dir }}/{{ item }}/db-{{ ansible_date_time.iso8601_basic_short }}.sql
          loop: "{{ postgres_databases }}"

        - name: Compress database backup files
          shell: gzip {{ backup_dir }}/{{ item }}/db-{{ ansible_date_time.iso8601_basic_short }}.sql
          loop: "{{ databases }}"

        - name: Check logrotate directories
          stat:
            path: "{{ backup_dir }}/{{ item[0] }}/{{ item[1] }}"
          register: subdirs
          with_nested:
            - "{{ systems }}"
            - ['daily', 'weekly', 'monthly', 'yearly']
          loop_control:
            label: "{{ item[0] }} {{ item[1] }}"

        - name: Create not existing logrotate directories
          file:
            path: "{{ backup_dir }}/{{ item.item[0] }}/{{ item.item[1] }}"
            state: directory
            mode: 0755
            group: chris
            owner: chris
          when: item.stat.exists == false
          with_items: "{{ subdirs.results }}"
          loop_control:
            label: "{{ item.item[0] }} {{ item.item[1] }}"

        - name: Search for the created backups
          find:
            paths: "{{ backup_dir }}/{{ item }}"
            file_type: file
            patterns: '*.gz'
            recurse: false
          register: backup_files
          loop: "{{ systems }}"

        - name: Store the yearly backups
          copy:
            remote_src: true
            src: "{{ item.path }}"
            dest: "{{ item.path | dirname }}/yearly/{{ item.path | basename }}"
          with_items: "{{ backup_files.results | map(attribute='files') | list }}"
          when: (ansible_date_time.day == "01" and ansible_date_time.month == "01")
          loop_control:
            label: "{{ item.path }}"

        - name: Store the monthly backups
          copy:
            remote_src: true
            src: "{{ item.path }}"
            dest: "{{ item.path | dirname }}/monthly/{{ item.path | basename }}"
          with_items: "{{ backup_files.results | map(attribute='files') | list }}"
          when: (ansible_date_time.day == "01" and ansible_date_time.month != "01")
          loop_control:
            label: "{{ item.path }}"

        - name: Store the weekly backups
          copy:
            remote_src: true
            src: "{{ item.path }}"
            dest: "{{ item.path | dirname }}/weekly/{{ item.path | basename }}"
          with_items: "{{ backup_files.results | map(attribute='files') | list }}"
          when: (ansible_date_time.weekday_number == "1")
          loop_control:
            label: "{{ item.path }}"

        - name: Store the daily backup
          copy:
            remote_src: true
            src: "{{ item.path }}"
            dest: "{{ item.path | dirname }}/daily/{{ item.path | basename }}"
          with_items: "{{ backup_files.results | map(attribute='files') | list }}"
          when: (ansible_date_time.weekday_number != "1" and ansible_date_time.day != "01")
          loop_control:
            label: "{{ item.path }}"

        - name: Cleanup original backup files
          file:
            path: "{{ item.path }}"
            state: absent
          with_items: "{{ backup_files.results | map(attribute='files') | list }}"
          loop_control:
            label: "{{ item.path }}"

        - name: Find old daily backups
          find:
            paths: "{{ backup_dir }}/{{ item }}/daily"
            file_type: file
            age: 8d
            age_stamp: ctime
            patterns: '*.gz'
            recurse: false
          register: backup_files
          loop: "{{ systems }}"

        - name: Delete old daily backups
          file:
            path: "{{ item.path }}"
            state: absent
          with_items: "{{ backup_files.results | map(attribute='files') | list }}"
          loop_control:
            label: "{{ item.path }}"

        - name: Find old weekly backups
          find:
            paths: "{{ backup_dir }}/{{ item }}/weekly"
            file_type: file
            age: 5w
            age_stamp: ctime
            patterns: '*.gz'
            recurse: false
          register: backup_files
          loop: "{{ systems }}"

        - name: Delete old weekly backups
          file:
            path: "{{ item.path }}"
            state: absent
          with_items: "{{ backup_files.results | map(attribute='files') | list }}"
          loop_control:
            label: "{{ item.path }}"

        - name: Find old monthly backups
          find:
            paths: "{{ backup_dir }}/{{ item }}/monthly"
            file_type: file
            age: 56w
            age_stamp: ctime
            patterns: '*.gz'
            recurse: false
          register: backup_files
          loop: "{{ systems }}"

        - name: Delete old monthly backups
          file:
            path: "{{ item.path }}"
            state: absent
          with_items: "{{ backup_files.results | map(attribute='files') | list }}"
          loop_control:
            label: "{{ item.path }}"

        - name: Search for other servers' backup directories
          find:
            paths: "/media/backup/{{ item }}"
            file_type: directory
            recurse: false
          register: backup_server_dirs
          loop: "{{ servers }}"

        - name: Find servers old daily backups
          find:
            path: "{{ item.path }}/daily"
            file_type: file
            age: 8d
            age_stamp: ctime
            patterns: '*.gz'
            recurse: false
          register: backup_files
          with_items: "{{ backup_server_dirs.results | map(attribute='files') | list }}"
          loop_control:
            label: "{{ item.path }}"

        - name: Delete servers old daily backups
          file:
            path: "{{ item.path }}"
            state: absent
          with_items: "{{ backup_files.results | map(attribute='files') | list }}"
          loop_control:
            label: "{{ item.path }}"

        - name: Find servers old weekly backups
          find:
            path: "{{ item.path }}/weekly"
            file_type: file
            age: 5w
            age_stamp: ctime
            patterns: '*.gz'
            recurse: false
          register: backup_files
          with_items: "{{ backup_server_dirs.results | map(attribute='files') | list }}"
          loop_control:
            label: "{{ item.path }}"

        - name: Delete servers old weekly backups
          file:
            path: "{{ item.path }}"
            state: absent
          with_items: "{{ backup_files.results | map(attribute='files') | list }}"
          loop_control:
            label: "{{ item.path }}"

        - name: Find servers old monthly backups
          find:
            path: "{{ item.path }}/monthly"
            file_type: file
            age: 56w
            age_stamp: ctime
            patterns: '*.gz'
            recurse: false
          register: backup_files
          with_items: "{{ backup_server_dirs.results | map(attribute='files') | list }}"
          loop_control:
            label: "{{ item.path }}"

        - name: Delete servers old monthly backups
          file:
            path: "{{ item.path }}"
            state: absent
          with_items: "{{ backup_files.results | map(attribute='files') | list }}"
          loop_control:
            label: "{{ item.path }}"

        - name: Inform Mattermost about success
          uri:
            url: "{{ mattermost_url }}"
            method: POST
            body_format: json
            body:
              channel_id: "{{ channel_id }}"
              message: "{{ ansible_date_time.date }} {{ ansible_date_time.time }}: Playbook ran successful ({{ ansible_play_name }})"
            headers:
              Content-Type: application/json
              Authorization: Bearer "{{ semaphore_token }}"
            status_code: [200, 201]

      rescue:
        - name: Inform Mattermost about error
          uri:
            url: "{{ mattermost_url }}"
            method: POST
            body_format: json
            body:
              channel_id: "{{ channel_id }}"
              message: "{{ ansible_date_time.date }} {{ ansible_date_time.time }}: Playbook ran with error ({{ ansible_play_name }})"
            headers:
              Content-Type: application/json
              Authorization: Bearer "{{ error_token }}"
            status_code: [200, 201]