deploy.py 文件源码

def _prepare_variables(task):
    node = task.node
    i_info = node.instance_info
    image = {}
    for i_key, i_value in i_info.items():
        if i_key.startswith('image_'):
            image[i_key[6:]] = i_value
    image['mem_req'] = _calculate_memory_req(task)

    checksum = image.get('checksum')
    if checksum:
        # NOTE(pas-ha) checksum can be in <algo>:<checksum> format
        # as supported by various Ansible modules, mostly good for
        # standalone Ironic case when instance_info is populated manually.
        # With no <algo> we take that instance_info is populated from Glance,
        # where API reports checksum as MD5 always.
        if ':' not in checksum:
            image['checksum'] = 'md5:%s' % checksum
    _add_ssl_image_options(image)
    variables = {'image': image}
    configdrive = i_info.get('configdrive')
    if configdrive:
        if urlparse.urlparse(configdrive).scheme in ('http', 'https'):
            cfgdrv_type = 'url'
            cfgdrv_location = configdrive
        else:
            cfgdrv_location = _get_configdrive_path(node.uuid)
            with open(cfgdrv_location, 'w') as f:
                f.write(configdrive)
            cfgdrv_type = 'file'
        variables['configdrive'] = {'type': cfgdrv_type,
                                    'location': cfgdrv_location}

    root_device_hints = _parse_root_device_hints(node)
    if root_device_hints:
        variables['root_device_hints'] = root_device_hints

    return variables