manager.py 文件源码

def _load_builder(path):
    # lifted straight from /usr/bin/swift-ring-builder
    from swift.common.ring import RingBuilder
    try:
        builder = pickle.load(open(path, 'rb'))
        if not hasattr(builder, 'devs'):
            builder_dict = builder
            builder = RingBuilder(1, 1, 1)
            builder.copy_from(builder_dict)
    except ImportError:  # Happens with really old builder pickles
        builder = RingBuilder(1, 1, 1)
        builder.copy_from(pickle.load(open(path, 'rb')))
    for dev in builder.devs:
        if dev and 'meta' not in dev:
            dev['meta'] = ''

    return builder