一：推文

软件定义网络基础---REST API概述

软件定义网络基础---REST API的设计规范

二：掌握Ryu基本RESTAPI使用方法

（一）Ryu的RESTAPI

（二） REST应用样例：app/ofctl_rest.py

1.所提供的样例API接口

# REST API
#

# Retrieve the switch stats
#
# get the list of all switches
# GET /stats/switches
#
# get the desc stats of the switch
# GET /stats/desc/<dpid>
#
# get flows desc stats of the switch
# GET /stats/flowdesc/<dpid>
#
# get flows desc stats of the switch filtered by the fields
# POST /stats/flowdesc/<dpid>
#
# get flows stats of the switch
# GET /stats/flow/<dpid>
#
# get flows stats of the switch filtered by the fields
# POST /stats/flow/<dpid>
#
# get aggregate flows stats of the switch
# GET /stats/aggregateflow/<dpid>
#
# get aggregate flows stats of the switch filtered by the fields
# POST /stats/aggregateflow/<dpid>
#
# get table stats of the switch
# GET /stats/table/<dpid>
#
# get table features stats of the switch
# GET /stats/tablefeatures/<dpid>
#
# get ports stats of the switch
# GET /stats/port/<dpid>[/<port>]
# Note: Specification of port number is optional
#
# get queues stats of the switch
# GET /stats/queue/<dpid>[/<port>[/<queue_id>]]
# Note: Specification of port number and queue id are optional
#       If you want to omitting the port number and setting the queue id,
#       please specify the keyword "ALL" to the port number
#       e.g. GET /stats/queue/1/ALL/1
#
# get queues config stats of the switch
# GET /stats/queueconfig/<dpid>[/<port>]
# Note: Specification of port number is optional
#
# get queues desc stats of the switch
# GET /stats/queuedesc/<dpid>[/<port>[/<queue_id>]]
# Note: Specification of port number and queue id are optional
#       If you want to omitting the port number and setting the queue id,
#       please specify the keyword "ALL" to the port number
#       e.g. GET /stats/queuedesc/1/ALL/1
#
# get meter features stats of the switch
# GET /stats/meterfeatures/<dpid>
#
# get meter config stats of the switch
# GET /stats/meterconfig/<dpid>[/<meter_id>]
# Note: Specification of meter id is optional
#
# get meter desc stats of the switch
# GET /stats/meterdesc/<dpid>[/<meter_id>]
# Note: Specification of meter id is optional
#
# get meters stats of the switch
# GET /stats/meter/<dpid>[/<meter_id>]
# Note: Specification of meter id is optional
#
# get group features stats of the switch
# GET /stats/groupfeatures/<dpid>
#
# get groups desc stats of the switch
# GET /stats/groupdesc/<dpid>[/<group_id>]
# Note: Specification of group id is optional (OpenFlow 1.5 or later)
#
# get groups stats of the switch
# GET /stats/group/<dpid>[/<group_id>]
# Note: Specification of group id is optional
#
# get ports description of the switch
# GET /stats/portdesc/<dpid>[/<port_no>]
# Note: Specification of port number is optional (OpenFlow 1.5 or later)

# Update the switch stats
#
# add a flow entry
# POST /stats/flowentry/add
#
# modify all matching flow entries
# POST /stats/flowentry/modify
#
# modify flow entry strictly matching wildcards and priority
# POST /stats/flowentry/modify_strict
#
# delete all matching flow entries
# POST /stats/flowentry/delete
#
# delete flow entry strictly matching wildcards and priority
# POST /stats/flowentry/delete_strict
#
# delete all flow entries of the switch
# DELETE /stats/flowentry/clear/<dpid>
#
# add a meter entry
# POST /stats/meterentry/add
#
# modify a meter entry
# POST /stats/meterentry/modify
#
# delete a meter entry
# POST /stats/meterentry/delete
#
# add a group entry
# POST /stats/groupentry/add
#
# modify a group entry
# POST /stats/groupentry/modify
#
# delete a group entry
# POST /stats/groupentry/delete
#
# modify behavior of the physical port
# POST /stats/portdesc/modify
#
# modify role of controller
# POST /stats/role
#
#
# send a experimeter message
# POST /stats/experimenter/<dpid>

（三）Ryu官方文档：https://ryu.readthedocs.io/en/latest/app/ofctl_rest.html

三：实验开始 

（一）开启Ryu控制器

ryu-manager ofctl_rest.py simple_switch_13.py --observe-links --verbose　　#除了使用RESTAPI之外，我们还要保证ryu控制器正常处理交换机逻辑

（二）开启Mininet

sudo mn --controller=remote --mac --topo=tree,2,2

 

（三）使用Curl发送URL请求

1.获取到所有交换机Get the list of all switches which connected to the controller.

$ curl -X GET http://localhost:8080/stats/switches

2.获取交换机的描述信息Get the desc stats of the switch which specified with Datapath ID in URI.

$ curl -X GET http://localhost:8080/stats/desc/1

 

3.其他类似

（四）Postman实验（更美观）

1.安装postman

2.获取交换机信息