designate_bind_handlers.py 文件源码

def setup_sync_target_alone():
    '''If this is the only unit in the application then setup a sync target.
    This will likely by empty as zones.initialised is only unset when a unit
    frst comes up but the presence of the target allows subsequent units to
    bootstrap if leadership flips to them as they come up'''
    if hookenv.is_leader():
        designate_bind.setup_sync()
        reactive.set_state('zones.initialised')