Ansible playbook to backup all Docker volumes in a remote host and then upload the backup file to a raw Nexus repository.

docker-volumes-backup.yml

---
- hosts: remote
  gather_facts: no
  tasks:
    - name: Make the volumes backup
      archive:
        path: /var/lib/docker/volumes
        dest: volumes.tar.gz
    - name: Make the backup available (requires vault-password-file)
      uri:
        url: https://www.example.com/nexus/repository/backups/volumes.tar.gz
        method: PUT
        src: volumes.tar.gz
        remote_src: true
        user: admin
        password: "{{ nexus_password }}"
        force_basic_auth: yes
        headers:
          Content-Type: application/octet-stream
      vars:
        nexus_password: !vault |
          $ANSIBLE_VAULT;1.1;AES256
          00000000000000000000000000000000000000000000000000000000000000000000000000000000
          00000000000000000000000000000000000000000000000000000000000000000000000000000000
          00000000000000000000000000000000000000000000000000000000000000000000000000000000
          00000000000000000000000000000000000000000000000000000000000000000000000000000000
          0000
      register: upload_result
      failed_when: upload_result.status != 201
      changed_when: upload_result.status == 201