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python-2.7 - 保留 Datapath#ports 以保持兼容性

转载 作者:行者123 更新时间:2023-12-03 09:55:01 33 4
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我正在尝试让 ryu 运行,尤其是拓扑发现。

现在我正在 ryu/topology/dumper.py 下运行演示应用程序,它应该转储所有拓扑事件。我在 ryu/topology 目录中并使用 ryu-manager dumper.py 运行它。 ryu-manager的版本是2.23.2。

启动后不久,它给了我这个错误:

/usr/local/lib/python2.7/dist-packages/ryu/topology/switches.py:478: UserWarning:
Datapath#ports is kept for compatibility with the previous openflow versions (< 1.3).
This not be updated by EventOFPPortStatus message. If you want to be updated,
you can use 'ryu.controller.dpset' or 'ryu.topology.switches'.
for port in dp.ports.values():

对我来说真正奇怪的是它建议使用 ryu.topology.switches,但该错误是由该文件的第 478 行触发的!

有问题的函数是这样的:

class Switches(app_manager.RyuApp):
OFP_VERSIONS = [ofproto_v1_0.OFP_VERSION, ofproto_v1_2.OFP_VERSION,
ofproto_v1_3.OFP_VERSION, ofproto_v1_4.OFP_VERSION]
_EVENTS = [event.EventSwitchEnter, event.EventSwitchLeave,
event.EventPortAdd, event.EventPortDelete,
event.EventPortModify,
event.EventLinkAdd, event.EventLinkDelete]

DEFAULT_TTL = 120 # unused. ignored.
LLDP_PACKET_LEN = len(LLDPPacket.lldp_packet(0, 0, DONTCARE_STR, 0))

LLDP_SEND_GUARD = .05
LLDP_SEND_PERIOD_PER_PORT = .9
TIMEOUT_CHECK_PERIOD = 5.
LINK_TIMEOUT = TIMEOUT_CHECK_PERIOD * 2
LINK_LLDP_DROP = 5
#...
def _register(self, dp):
assert dp.id is not None

self.dps[dp.id] = dp
if dp.id not in self.port_state:
self.port_state[dp.id] = PortState()
for port in dp.ports.values(): # THIS LINE
self.port_state[dp.id].add(port.port_no, port)

有没有人遇到过这个问题?我该如何解决?

最佳答案

我遇到了同样的问题(取决于你的应用程序,也许这不是问题,只是一个你可以忽略的警告)。这是我在 find 之后发现的。 -类型f | xargs grep “保留端口”

此警告在 ryu.topology.switches 中触发,通过调用文件 class Datapath 中的 _get_ports() ryu/controller/controller.py.

class Datapath(ofproto_protocol.ProtocolDesc):
#......
def _get_ports(self):
if (self.ofproto_parser is not None and
self.ofproto_parser.ofproto.OFP_VERSION >= 0x04):
message = (
'Datapath#ports is kept for compatibility with the previous '
'openflow versions (< 1.3). '
'This not be updated by EventOFPPortStatus message. '
'If you want to be updated, you can use '
'\'ryu.controller.dpset\' or \'ryu.topology.switches\'.'
)
warnings.warn(message, stacklevel=2)
return self._ports

def _set_ports(self, ports):
self._ports = ports

# To show warning when Datapath#ports is read
ports = property(_get_ports, _set_ports)

我的理解是,如果警告来自ryu.topology.switches或者ryu.controller.dpset,可以忽略;因为这两个类会为您处理事件。但是如果你直接使用Datapath,端口状态不会自动更新。如果我错了,有人会纠正我。

class Switches(app_manager.RyuApp):
#......
@set_ev_cls(ofp_event.EventOFPPortStatus, MAIN_DISPATCHER)
def port_status_handler(self, ev):

关于python-2.7 - 保留 Datapath#ports 以保持兼容性,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/31435099/

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