Dear,
Please kindly suggest me how to detect node failure. I follow the following
code to detect the node failure by writing the event.EventSwitchLeave but I
can only detect the switch enter. When I shut down the node, the leaved
switch cannot be detected.
from operator import attrgetter
from ryu.base import app_manager
from ryu.controller import ofp_event
from ryu.controller.handler import CONFIG_DISPATCHER, MAIN_DISPATCHER,
DEAD_DISPATCHER
from ryu.controller.handler import set_ev_cls
from ryu.ofproto import ofproto_v1_3
from ryu.controller import dpset
from ryu.lib.packet import ipv4
from ryu.lib.packet import tcp
from ryu.lib.packet import packet
from ryu.lib.packet import ethernet
from ryu.lib.packet import ether_types
from ryu.topology import event, switches
from ryu.lib import hub
from ryu.topology.switches import LLDPPacket
from ryu import topology
import numpy
from ryu.topology.api import get_switch, get_link, get_all_link, get_all_switch
from ryu.lib import dpid
from threading import Lock
from collections import defaultdict
import copy
import os
import time
class SimpleSwitch13(app_manager.RyuApp):
OFP_VERSIONS = [ofproto_v1_3.OFP_VERSION]
def __init__(self, *args, **kwargs):
super(SimpleSwitch13, self).__init__(*args, **kwargs)
self.datapaths = {}
self.mac_to_port = {}
self.switches={}
@set_ev_cls(event.EventSwitchEnter)
def switch_enter_handler(self,event):
switch = event.switch.dp.id
switch_ip = event.switch.dp.address
self.switches[switch] = switch_ip
# print("List of switches", self.switches)
@set_ev_cls(event.EventSwitchLeave)
def switch_leave_handler(self,event):
switch = event.switch.dp.id
switch_ip = event.switch.dp.address
print("deleted switch ID",switch)
if switch in switches:
del self.switches[switch]
print("deleted switch",self.switches)
Best regards,
Soe Ye Htet
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