- block:
  - docker_container_info:
      name: "{{ container_name | mandatory }}"
    register: cobald_container_info

  - set_fact:
      cobald_container_hostname: |-
        {{cobald_container_info.container.Config.Hostname | default('cobald-'+
          lookup('password', '/dev/null chars=ascii_lowercase length=6')) }}
  when: cobald_container_hostname is not defined