Read the configuration file and look for ceph-deploy sections
    to set flags/defaults from the values found. This will alter the
    ``args`` object that is created by argparse.

def set_overrides(args, _conf=None):
    """
    Read the configuration file and look for ceph-deploy sections
    to set flags/defaults from the values found. This will alter the
    ``args`` object that is created by argparse.
    """
    # Get the subcommand name to avoid overwritting values from other
    # subcommands that are not going to be used
    subcommand = args.func.__name__
    command_section = 'ceph-deploy-%s' % subcommand
    conf = _conf or load()

    for section_name in conf.sections():
        if section_name in ['ceph-deploy-global', command_section]:
            override_subcommand(
                section_name,
                conf.items(section_name),
                args
            )
    return args