Python Controller.get_network_topology_yang_schema_path方法代码示例

# 需要导入模块: from pybvc.controller.controller import Controller [as 别名]
# 或者: from pybvc.controller.controller.Controller import get_network_topology_yang_schema_path [as 别名]
def of_demo_29():
    f = "cfg.yml"
    d = {}
    if(load_dict_from_file(f, d) is False):
        print("Config file '%s' read error: " % f)
        exit()

    try:
        ctrlIpAddr = d['ctrlIpAddr']
        ctrlPortNum = d['ctrlPortNum']
        ctrlUname = d['ctrlUname']
        ctrlPswd = d['ctrlPswd']
        rundelay = d['rundelay']
    except:
        print ("Failed to get Controller device attributes")
        exit(0)



    description = (
        "<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n"
        " This demo illustrates how to use Controller's notification \n"
        " subscription service for tracing dynamic changes in the\n"
        " network topology data tree maintained by the Controller.\n"
        "\n"
        " It is implied that core network services (Forwarding Rules\n"
        " Manager, Topology Manager, Switch Manager, Host Tracker)\n"
        " are functioning on the Controller\n"
        "\n"
        " This script creates an event listener on the Controller and\n"
        " establishes permanent connection to the events notification\n"
        " stream. Once a data change event in the topology tree (such\n"
        " as add/remove switch, host or link) is detected it will be\n"
        " reported to the screen.\n"
        "<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n"
    )

    print "\n".strip()
    print description
    print "\n".strip()
    time.sleep(rundelay)

    print ("<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<")
    print ("<<< Demo 29 Start")
    print ("<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<")

    ctrl = Controller(ctrlIpAddr, ctrlPortNum, ctrlUname, ctrlPswd)
    # Identifier of the network topology to be traced
    # (name used by Controller for default topology instance)
    topo_id = 'flow:1'
    print "\n".strip()
    print ("<<< 'Controller': %s, Topology Identifier: '%s'"
           % (ctrlIpAddr, topo_id))
    time.sleep(rundelay)

    # Data store for the changes
    # Can be one of:
    # - CONFIGURATION: Logical data store representing configuration
    #                  state of the system and it's components.
    # - OPERATIONAL:   Logical data store representing operational
    #                  state of the system and it's components
    datastore = "OPERATIONAL"

    # Scope of the data changes
    # Can be one of:
    # - BASE:    Represents only a direct change of the node, such as
    #            replacement, addition or deletion of the node.
    # - ONE:     Represent a change (addition, replacement, deletion)
    #            of the node or one of its direct children.
    #            This scope is a superset of BASE.
    # - SUBTREE: Represents a change of the node or any of its child
    #            nodes, direct and nested.
    #            This scope is superset of ONE and BASE.
    scope = "SUBTREE"

    # Path to the network topology node in the YANG data tree
    path = ctrl.get_network_topology_yang_schema_path(topo_id)

    # Create listener on the Controller (if it does already exist Controller
    # just returns the stream name to subscribe to)
    print path
    result = ctrl.create_data_change_event_subscription(datastore, scope, path)
    status = result.get_status()
    if not status.eq(STATUS.OK):
        print ("\n")
        print ("!!!Demo terminated, reason: %s" % status.detailed())
        exit(1)

    print "Here1"

    stream_name = result.get_data()

    print "here2"

    # Subscribe to the stream
    result = ctrl.subscribe_to_stream(stream_name)
    print "here 3"
    status = result.get_status()
    if not status.eq(STATUS.OK):
        print ("\n")
#.........这里部分代码省略.........

# 需要导入模块: from pybvc.controller.controller import Controller [as 别名]
# 或者: from pybvc.controller.controller.Controller import get_network_topology_yang_schema_path [as 别名]
 datastore = "OPERATIONAL"
 
 # Scope of the data changes
 # Can be one of:
 # - BASE:    Represents only a direct change of the node, such as
 #            replacement, addition or deletion of the node.
 # - ONE:     Represent a change (addition, replacement, deletion)
 #            of the node or one of its direct children.
 #            This scope is a superset of BASE.
 # - SUBTREE: Represents a change of the node or any of its child
 #            nodes, direct and nested.
 #            This scope is superset of ONE and BASE.
 scope = "SUBTREE"
 
 # Path to the network topology node in the YANG data tree
 path = ctrl.get_network_topology_yang_schema_path(topo_id)
 
 # Create listener on the Controller (if it does already exist Controller
 # just returns the stream name to subscribe to)
 result = ctrl.create_data_change_event_subscription(datastore, scope, path)
 status = result.get_status()
 if not status.eq(STATUS.OK):
     print ("\n")
     print ("!!!Demo terminated, reason: %s" % status.detailed())
     exit(1)
 
 stream_name = result.get_data()
 
 # Subscribe to the stream
 result = ctrl.subscribe_to_stream(stream_name)
 status = result.get_status()