pg_gw_utils.py 文件源码

def get_gw_interfaces():
    '''
    Gateway node can have multiple interfaces. This function parses json
    provided in config to get all gateway interfaces for this node.
    '''
    node_interfaces = []
    try:
        all_interfaces = json.loads(config('external-interfaces'))
    except ValueError:
        raise ValueError("Invalid json provided for gateway interfaces")
    hostname = get_unit_hostname()
    if hostname in all_interfaces:
        node_interfaces = all_interfaces[hostname].split(',')
    elif 'DEFAULT' in all_interfaces:
        node_interfaces = all_interfaces['DEFAULT'].split(',')
    for interface in node_interfaces:
        if not interface_exists(interface):
            log('Provided gateway interface %s does not exist'
                % interface)
            raise ValueError('Provided gateway interface does not exist')
    return node_interfaces