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先自我介绍一下,小编浙江大学毕业,去过华为、字节跳动等大厂,目前阿里P7
深知大多数程序员,想要提升技能,往往是自己摸索成长,但自己不成体系的自学效果低效又漫长,而且极易碰到天花板技术停滞不前!
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<flow> <id>#UF$TABLE*0-2</id> <flow-statistics xmlns="urn:opendaylight:flow:statistics"> <packet-count>0</packet-count> <duration> <nanosecond>145000000</nanosecond> <second>264</second> </duration> <byte-count>0</byte-count> </flow-statistics> <priority>0</priority> <table_id>0</table_id> <hard-timeout>0</hard-timeout> <match></match> <cookie>3098476543630901249</cookie> <idle-timeout>0</idle-timeout> </flow> <flow> <id>L2switch-0</id> <flow-statistics xmlns="urn:opendaylight:flow:statistics"> <packet-count>1</packet-count> <duration> <nanosecond>652000000</nanosecond> <second>258</second> </duration> <byte-count>70</byte-count> </flow-statistics> <priority>2</priority> <table_id>0</table_id> <hard-timeout>0</hard-timeout> <match> <in-port>openflow:1:2</in-port> </match> <cookie>3098476543630901248</cookie> <instructions> <instruction> <order>0</order> <apply-actions> <action> <order>0</order> <output-action> <max-length>65535</max-length> <output-node-connector>1</output-node-connector> </output-action> </action> <action> <order>2</order> <output-action> <max-length>65535</max-length> <output-node-connector>CONTROLLER</output-node-connector> </output-action> </action> <action> <order>1</order> <output-action> <max-length>65535</max-length> <output-node-connector>3</output-node-connector> </output-action> </action> </apply-actions> </instruction> </instructions> <idle-timeout>0</idle-timeout> </flow> <flow> <id>#UF$TABLE*0-3</id> <flow-statistics xmlns="urn:opendaylight:flow:statistics"> <packet-count>3</packet-count> <duration> <nanosecond>647000000</nanosecond> <second>258</second> </duration> <byte-count>247</byte-count> </flow-statistics> <priority>2</priority> <table_id>0</table_id> <hard-timeout>0</hard-timeout> <match> <in-port>openflow:1:1</in-port> </match> <cookie>3098476543630901249</cookie> <instructions> <instruction> <order>0</order> <apply-actions> <action> <order>0</order> <output-action> <max-length>65535</max-length> <output-node-connector>2</output-node-connector> </output-action> </action> <action> <order>1</order> <output-action> <max-length>65535</max-length> <output-node-connector>3</output-node-connector> </output-action> </action> </apply-actions> </instruction> </instructions> <idle-timeout>0</idle-timeout> </flow> <flow-table-statistics xmlns="urn:opendaylight:flow:table:statistics"> <packets-matched>57</packets-matched> <active-flows>5</active-flows> <packets-looked-up>105</packets-looked-up> </flow-table-statistics>
从这个xml中,我们可以看到流表的一些信息,包括流表的id,使用的交换机,一个流表项的入端口等,另外标签中是流表的一个流表项,共5条。
流表中字段含义
字段 | 含义 |
---|---|
table_id | int,流表的id |
id | string,流表项的id |
priority | int,流表项的优先级 |
cookie | int,控制器发出的标识符 |
cookie_mask | int,掩码,用于限制必须匹配的cookie位 |
idle-timeout | int,丢弃前的空闲时间(秒) |
hard-timeout | int,丢弃前的最长时间(秒) |
match | dict,匹配域 |
ethernet-match | dict,以太网匹配 |
ethernet-type | dict,以太网类型 |
type | str,0x0800:使用ip匹配,0x8847:使用mac匹配 |
ipv4-destination | ipv4的目的ip地址 |
instructions | dict,动作集 |
instruction | list,动作,指令 |
order | int,顺序 |
标题
json格式的流表项
{ "flow-node-inventory:flow": [ { "id": "L2switch-2", "opendaylight-flow-statistics:flow-statistics": { "packet-count": 2, "duration": { "nanosecond": 81000000, "second": 768 }, "byte-count": 140 }, "priority": 2, "table_id": 0, "hard-timeout": 0, "match": { "in-port": "openflow:1:3" }, "cookie": 3098476543630901250, "instructions": { "instruction": [ { "order": 0, "apply-actions": { "action": [ { "order": 0, "output-action": { "max-length": 65535, "output-node-connector": "2" } }, { "order": 2, "output-action": { "max-length": 65535, "output-node-connector": "CONTROLLER" } }, { "order": 1, "output-action": { "max-length": 65535, "output-node-connector": "1" } } ] } } ] }, "idle-timeout": 0 } ] }
import urllib.request from base64 import encodebytes ip = "192.168.31.174" node_id = "openflow:1" table_id = "0" flow_id = "L2switch-2" username = "admin" password = "admin" url = "http://" + ip + ":8181/restconf/operational/opendaylight-inventory:nodes/node/" + node_id + "/flow-node-inventory:table/" + table_id +"/flow/"+flow_id print(url) # 添加请求的url和method req = urllib.request.Request(url, method="GET") # 添加header b64str = encodebytes(bytes('%s:%s' % (username, password), 'utf-8'))[:-1] req.add_header("Authorization", "Basic %s" % b64str.decode('utf-8')) returnData = urllib.request.urlopen(req) res_json = returnData.read().decode('utf-8') print(res_json)
命令查看流表项
命令删除流表项
使用PUT方式,账号密码依然还是admin,注意url是使用的config,不是operational,选择json格式,点击send。
使用Postman添加流表项
再次查看流表
再次查看流表后发现添加了一条流表项,h1、h2使用的是交换机s1的端口s1-eth1与s1-eth2,所以,h1与h2可以ping通。
import urllib.request from base64 import encodebytes from django.contrib.sites import requests ip = "192.168.31.174" # node_id = "openflow:1" print("please input name of switch:") node_id = input() table_id = "0" # flow_id = "L2switch-2" print("please input id of flow:") flow_id = input() username = "admin" password = "admin" url = "http://" + ip + ":8181/restconf/config/opendaylight-inventory:nodes/node/" + node_id + "/flow-node-inventory:table/" + table_id + "/flow/" + flow_id print(url) flow = { "flow-node-inventory:flow": [ { "id": "L2switch-2", "priority": 2, "table_id": 0, "hard-timeout": 0, "match": { "in-port": "openflow:1:3" }, "cookie": 3098476543630901250, "instructions": { "instruction": [ { "order": 0, "apply-actions": { "action": [ { "order": 0, "output-action": { "max-length": 65535, "output-node-connector": "2" } } ] } } ] }, "idle-timeout": 0 } ] } flow["flow-node-inventory:flow"][0]["id"] = flow_id print("please input priority of this flow:") flow["flow-node-inventory:flow"][0]["priority"] = int(input()) print("please input hard-timeout of this flow:") flow["flow-node-inventory:flow"][0]["hard-timeout"] = int(input()) print("please input idle-timeout of this flow:") flow["flow-node-inventory:flow"][0]["idle-timeout"] = int(input()) print("please input in-port of this flow:") flow["flow-node-inventory:flow"][0]["match"]["in-port"] = node_id + ":" + input() print("please input output-port of this flow:") flow["flow-node-inventory:flow"][0]["instructions"]["instruction"][0]["apply-actions"]["action"][0]["output-action"][ "output-node-connector"] = input() print("flow_id:" + str(flow["flow-node-inventory:flow"][0]["id"])) print("priority:" + str(flow["flow-node-inventory:flow"][0]["priority"])) print("hard-timeout:" + str(flow["flow-node-inventory:flow"][0]["hard-timeout"])) print("idle-timeout:" + str(flow["flow-node-inventory:flow"][0]["idle-timeout"])) print("in-port:" + flow["flow-node-inventory:flow"][0]["match"]["in-port"]) print("output-port:" + flow["flow-node-inventory:flow"][0]["instructions"]["instruction"][0]["apply-actions"]["action"][0][ "output-action"]["output-node-connector"]) print(flow) # 添加请求的url、data、method req = urllib.request.Request(url=url, data=bytes(str(flow), 'utf-8'), method="PUT") # 添加header b64str = encodebytes(bytes('%s:%s' % (username, password), 'utf-8'))[:-1] req.add_header("Authorization", "Basic %s" % b64str.decode('utf-8')) req.add_header("Accept", "application/json") req.add_header("Content-Type", "application/json") returnData = urllib.request.urlopen(req) res_json = returnData.read().decode('utf-8') print(res_json)
实验结果
在结束之际,我想重申的是,学习并非如攀登险峻高峰,而是如滴水穿石般的持久累积。尤其当我们步入工作岗位之后,持之以恒的学习变得愈发不易,如同在茫茫大海中独自划舟,稍有松懈便可能被巨浪吞噬。然而,对于我们程序员而言,学习是生存之本,是我们在激烈市场竞争中立于不败之地的关键。一旦停止学习,我们便如同逆水行舟,不进则退,终将被时代的洪流所淘汰。因此,不断汲取新知识,不仅是对自己的提升,更是对自己的一份珍贵投资。让我们不断磨砺自己,与时代共同进步,书写属于我们的辉煌篇章。
需要完整版PDF学习资源私我
网上学习资料一大堆,但如果学到的知识不成体系,遇到问题时只是浅尝辄止,不再深入研究,那么很难做到真正的技术提升。
需要这份系统化的资料的朋友,可以添加V获取:vip204888 (备注网络安全)
一个人可以走的很快,但一群人才能走的更远!不论你是正从事IT行业的老鸟或是对IT行业感兴趣的新人,都欢迎加入我们的的圈子(技术交流、学习资源、职场吐槽、大厂内推、面试辅导),让我们一起学习成长!
对于我们程序员而言,学习是生存之本,是我们在激烈市场竞争中立于不败之地的关键。一旦停止学习,我们便如同逆水行舟,不进则退,终将被时代的洪流所淘汰。因此,不断汲取新知识,不仅是对自己的提升,更是对自己的一份珍贵投资。让我们不断磨砺自己,与时代共同进步,书写属于我们的辉煌篇章。**
需要完整版PDF学习资源私我
网上学习资料一大堆,但如果学到的知识不成体系,遇到问题时只是浅尝辄止,不再深入研究,那么很难做到真正的技术提升。
需要这份系统化的资料的朋友,可以添加V获取:vip204888 (备注网络安全)
[外链图片转存中…(img-VunWXK67-1713401389981)]
一个人可以走的很快,但一群人才能走的更远!不论你是正从事IT行业的老鸟或是对IT行业感兴趣的新人,都欢迎加入我们的的圈子(技术交流、学习资源、职场吐槽、大厂内推、面试辅导),让我们一起学习成长!
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