Netzwerkmanangement

Netconf & YANG

https://www.juniper.net/techpubs/en_US/junos/topics/task/operational/netconf-yang-rpcs-custom-retrieving-operational-information.html

RFCs

RFC 6020: YANG - A Data Modeling Language for the Network Configuration Protocol (NETCONF)
RFC 6244: An Architecture for Network Management Using NETCONF and YANG

Tools

https://github.com/CiscoDevNet/yang-explorer

MQTT-Netconf-YANG Bridge

LED-Color: blue

mosquitto_pub -d -h localhost -p 1883 -t "yang/config" -m '{ 
"device":{ "description": "MQTT-Device identified by UUID",
 "uuid":{ "type": "string", "value": "F97dfF79-8A12-4F4F-8F69-6B8F3C2EdadDD" },
 "device-category":{ "description": "Identifies the device category", "type": "string", "value":"L-LAMP" } }, 
"rpc": { "set_color_blue": { "description": "RPC call that sets the LED Color to blue",
 "mqtt-command": "BLUE", "input": { "uuid": { "description": "Sends request to device specified by uuid", "type": "string" } } }, 
"switch_off": { "description": "Switches the LIFX-Led off", "mqtt-command": "OFF" } } }'

{  
   "device":{  
      "description":"MQTT-Device identified by UUID",
      "uuid":{  
         "type":"string",
         "value":"F97dfF79-8A12-4F4F-8F69-6B8F3C2EdadDD"
      },
      "device-category":{  
         "description":"Identifies the device category",
         "type":"string",
         "value":"L-LAMP"
      }
   },
   "rpc":{  
      "set_color_blue":{  
         "description":"RPC call that sets the LED Color to blue",
         "mqtt-command":"BLUE",
         "input":{  
            "uuid":{  
               "description":"Sends request to device specified by uuid",
               "type":"string"
            }
         }
      },
      "switch_off":{  
         "description":"Switches the LIFX-Led off",
         "mqtt-command":"OFF"
      }
   }
}

LED-Color: green

mosquitto_pub -d -h localhost -p 1883 -t "yang/config" -m '{ "device":{ "description": "MQTT-Device identified by UUID",
 "uuid":{ "type": "string", "value": "F97dfF79-8A12-4F4F-8F69-6B8F3C2EdadDD" },
 "device-category":{ "description": "Identifies the device category", "type": "string", "value":"L-LAMP" } },
 "rpc": { "set_color_green": { "description": "RPC call that sets the LED Color to green",
 "mqtt-command": "GREEN", "input": { "uuid": { "description": "Sends request to device specified by uuid",
 "type": "string" } } }, "switch_off": { "description": "Switches the LIFX-Led off", "mqtt-command": "OFF" } } }'

{  
   "device":{  
      "description":"MQTT-Device identified by UUID",
      "uuid":{  
         "type":"string",
         "value":"F97dfF79-8A12-4F4F-8F69-6B8F3C2EdadDD"
      },
      "device-category":{  
         "description":"Identifies the device category",
         "type":"string",
         "value":"L-LAMP"
      }
   },
   "rpc":{  
      "set_color_green":{  
         "description":"RPC call that sets the LED Color to green",
         "mqtt-command":"GREEN",
         "input":{  
            "uuid":{  
               "description":"Sends request to device specified by uuid",
               "type":"string"
            }
         }
      },
      "switch_off":{  
         "description":"Switches the LIFX-Led off",
         "mqtt-command":"OFF"
      }
   }
}

LED-Color: green + blue

mosquitto_pub -d -h localhost -p 1883 -t "yang/config" -m '{ 
"device":{ "description": "MQTT-Device identified by UUID", "uuid":{ "type": "string", "value": "F97dfF79-8A12-4F4F-8F69-6B8F3C2EdadDD" }, "device-category":{ "description": "Identifies the device category", "type": "string", "value":"L-LAMP" } }, 
"rpc": { 
"set_color_blue": { "description": "RPC call that sets the LED Color to blue", "mqtt-command": "BLUE", "input": { "uuid": { "description": "Sends request to device specified by uuid", "type": "string" } } },
"set_color_green": { "description": "RPC call that sets the LED Color to green", "mqtt-command": "GREEN", "input": { "uuid": { "description": "Sends request to device specified by uuid", "type": "string" } } }, 
"switch_off": { "description": "Switches the LIFX-Led off", "mqtt-command": "OFF" } } }'

{  
   "device":{  
      "description":"MQTT-Device identified by UUID",
      "uuid":{  
         "type":"string",
         "value":"F97dfF79-8A12-4F4F-8F69-6B8F3C2EdadDD"
      },
      "device-category":{  
         "description":"Identifies the device category",
         "type":"string",
         "value":"L-LAMP"
      }
   },
   "rpc":{  
      "set_color_blue":{  
         "description":"RPC call that sets the LED Color to blue",
         "mqtt-command":"BLUE",
         "input":{  
            "uuid":{  
               "description":"Sends request to device specified by uuid",
               "type":"string"
            }
         }
      },
      "set_color_green":{  
         "description":"RPC call that sets the LED Color to green",
         "mqtt-command":"GREEN",
         "input":{  
            "uuid":{  
               "description":"Sends request to device specified by uuid",
               "type":"string"
            }
         }
      },
      "switch_off":{  
         "description":"Switches the LIFX-Led off",
         "mqtt-command":"OFF"
      }
   }
}

m = manager.connect_ssh("localhost", port=44555, username="Thomas", password="admin",allow_agent=False,hostkey_verify=False,look_for_keys=False)
n = xml_.to_ele('<get-schema/>')
m.dispatch(n)

n = xml_.to_ele('<get/>')
n = xml_.to_ele('<set_color_blue><uuid>12345</uuid></set_color_blue>')
n = xml_.to_ele('<set_color_green><uuid>12345</uuid></set_color_green>')
n = xml_.to_ele('<switch_off><uuid>1fff</uuid></switch_off>')

ACHTUNG: Server stürzt ab, wenn kein UUID tag angegeben wird.

Setup in iTerm: (cd /Users/Thomas/LIFX/demo):

Links: mqtt/LIFX bridge (./mqtt)
Mitte: mqtt_publisher (send json)
Rechts: mqtt_subscriber (mosquitto_sub -d -h localhost -p 1883 -t „#“)
Unten: /usr/local/sbin/mosquitto -c ./mqtt.conf

Terminal:

Virtenv starten:

source python-virtenv/bin/activate

NETCONF/MQTT bridge:

python -i netconf_Server.py   # Achtung: MQTT Broker muss vorher gestartet sein!

ncclient:

from ncclient import manager
from ncclient import xml_

for capability in m.server_capabilities:
...             print(capability)

m = manager.connect_ssh('ios-xe-mgmt.cisco.com', port=10000, username="root", password='C!sc0123',allow_agent=False,hostkey_verify=False,look_for_keys=False)