duplicity-backup/tasks/main.yml

---

- name: Install required apt packages
  apt:
    name:
      - duplicity
      - gnupg
      - lftp
      - python-pip
    update_cache: yes
  when: ansible_distribution == 'Ubuntu' and ansible_distribution_version != '20.04'

- name: Install required apt packages
  apt:
    name:
      - duplicity
      - gnupg
      - lftp
      - python3-pip
    update_cache: yes
  when: ansible_distribution == 'Ubuntu' and ansible_distribution_version == '20.04'

- name: Install required pip package
  pip:
    name: boto
    state: latest

- name: Get current duplicity-backup version
  shell: "/usr/local/bin/duplicity-backup --version || true"
  check_mode: no
  changed_when: no
  register: duplicity_backup_version_cmd

- name: Install duplicity-backup wrapper
  unarchive:
    remote_src: true
    src: "https://github.com/Luzifer/duplicity-backup/releases/download/{{ duplicity_backup_version }}/duplicity-backup_linux_amd64.tar.gz"
    dest: /usr/local/bin
  when: duplicity_backup_version not in duplicity_backup_version_cmd.stdout
  register: duplicity_backup_unarchive

- name: Move new duplicity-backup version in place
  command: mv /usr/local/bin/duplicity-backup_linux_amd64 /usr/local/bin/duplicity-backup
  when: duplicity_backup_unarchive.changed

- name: Deploy duplicity-s3 configuration
  template:
    src: duplicity-backup.yaml.j2
    dest: /etc/duplicity-backup.yaml

- name: Add cronjob to clean logs
  cron:
    name: Cleanup logs
    special_time: daily
    job: /usr/bin/find /var/log/duplicity -type f -mtime +14 -delete
    cron_file: duplicity
    user: root

- name: Set up cron for backups
  cron:
    name: Duplicity Backup
    special_time: hourly
    job: /usr/bin/ionice -c3 /usr/bin/nice -n19 /usr/local/bin/duplicity-backup -f /etc/duplicity-backup.yaml backup
    user: root
    cron_file: duplicity

- name: Ensure .config directory used by duplicity
  file:
    dest: /root/.config
    state: directory

...