code: def write_yum_repo(content, filename='ceph.repo'):
      
      repo_path = os.path.join('/etc/yum.repos.d', filename)
      if not isinstance(content, str):
          content = content.decode('utf-8')
      write_file(repo_path, content.encode('utf-8'))
docs: add yum repo file in /etc/yum.repos.d/