SDN期末作业验收
SDN期末作業驗收
參考場景一
搭建的拓撲圖：
負載均衡程序
import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.OutputStream; import java.io.OutputStreamWriter; import java.io.UnsupportedEncodingException; import java.net.HttpURLConnection; import java.net.URL; import java.util.Base64;import net.sf.json.*; public class Main {public static JSONObject jsonObject = null;public static JSONObject[] jsonArray = new JSONObject[100];static String url24= "http://172.17.172.244:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:2/flow-node-inventory:table/0/flow/0";static String url14= "http://172.17.172.244:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:1/flow-node-inventory:table/0/flow/1";static String url21= "http://172.17.172.244:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:2/flow-node-inventory:table/0/flow/0";static String url12= "http://172.17.172.244:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:1/flow-node-inventory:table/0/flow/1";public static JSONObject httpRequest(String requestUrl, String requestMethod,int index) {StringBuffer buffer = new StringBuffer();try {URL url = new URL(requestUrl);// http協議傳輸HttpURLConnection httpUrlConn = (HttpURLConnection) url.openConnection();httpUrlConn.setDoOutput(true);httpUrlConn.setDoInput(true);httpUrlConn.setUseCaches(false);String userPassword = "admin" + ":" + "admin";String encoding = Base64.getEncoder().encodeToString((userPassword).getBytes());httpUrlConn.setRequestProperty("Authorization", "Basic " + encoding); httpUrlConn.setRequestProperty("Connection", "Keep-Alive"); // 設置維持長連接httpUrlConn.setRequestProperty("Charset", "UTF-8");// 設置文件字符集:// 設置請求方式（GET/POST）httpUrlConn.setRequestMethod(requestMethod);if ("GET".equalsIgnoreCase(requestMethod)){httpUrlConn.connect();// 將返回的輸入流轉換成字符串InputStream inputStream = httpUrlConn.getInputStream();InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");BufferedReader bufferedReader = new BufferedReader(inputStreamReader);String str = null;while ((str = bufferedReader.readLine()) != null) {buffer.append(str);}bufferedReader.close();inputStreamReader.close();// 釋放資源inputStream.close();inputStream = null;httpUrlConn.disconnect();jsonObject = JSONObject.fromObject(buffer.toString());// System.out.println(buffer.toString());}else if("PUT".equalsIgnoreCase(requestMethod)){byte[] data = (jsonArray[index].toString()).getBytes();//轉換為字節數組httpUrlConn.setRequestProperty("Content-Length", String.valueOf(data.length));// 設置文件長度httpUrlConn.setRequestProperty("Content-Type", "application/json;charset=utf-8");// 開始連接請求httpUrlConn.connect();OutputStream out = httpUrlConn.getOutputStream(); // 寫入請求的字符串out.write((jsonArray[index].toString()).getBytes());out.flush();out.close();if (httpUrlConn.getResponseCode() == 200) { System.out.println("發送成功");}}else if("DELETE".equalsIgnoreCase(requestMethod)){}} catch (Exception e) {e.printStackTrace();}return jsonObject;}public static void init() throws IOException{String s = null;int i = 0;try {BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream("DATA.txt"),"UTF-8"));while((s = br.readLine())!=null){jsonArray[i] = JSONObject.fromObject(s);i++;}String url31= "http://172.17.172.244:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:3/flow-node-inventory:table/0/flow/0";String url32= "http://172.17.172.244:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:3/flow-node-inventory:table/0/flow/1";String url11= "http://172.17.172.244:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:1/flow-node-inventory:table/0/flow/0";String url22= "http://172.17.172.244:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:2/flow-node-inventory:table/0/flow/1";String url13= "http://172.17.172.244:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:1/flow-node-inventory:table/0/flow/2";String url23= "http://172.17.172.244:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:2/flow-node-inventory:table/0/flow/2";String url33= "http://172.17.172.244:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:3/flow-node-inventory:table/0/flow/2";httpRequest(url31,"PUT",0);httpRequest(url32,"PUT",1);httpRequest(url21,"PUT",2);httpRequest(url11,"PUT",3);httpRequest(url12,"PUT",4);httpRequest(url22,"PUT",5);httpRequest(url13,"PUT",6);httpRequest(url23,"PUT",7);httpRequest(url33,"PUT",10);} catch (UnsupportedEncodingException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (FileNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace();}}public static int getReceived(String url2){jsonObject = httpRequest(url2,"GET",0);JSONArray j1 = (JSONArray) jsonObject.get("node-connector");JSONObject j2 = (JSONObject) j1.get(0);JSONObject j3 = (JSONObject) j2.get("opendaylight-port-statistics:flow-capable-node-connector-statistics");JSONObject j4 = (JSONObject)j3.get("bytes");int received = (int) j4.get("received");return received;}public static void main(String[] args) {System.out.println("-------------------------------------------------");try {init();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}String s = "";String url = "http://172.17.172.244:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:3/flow-node-inventory:table/0/flow/1";String url1= "http://172.17.172.244:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:2/flow-node-inventory:table/0/flow/0";String url2 = "http://172.17.172.244:8181/restconf/operational/opendaylight-inventory:nodes/node/openflow:2/node-connector/openflow:2:2"; // jsonObject = httpRequest(url2,"GET",0); // System.out.println(jsonObject.toString());int received ;int temp = 0;while(true){received = getReceived(url2);try {Thread.sleep(5000);} catch (InterruptedException e) {// TODO Auto-generated catch blocke.printStackTrace();} System.out.println(received-temp);//這里我們去判斷S2交換機通過包的增長數量來選擇路徑，實現負載均衡if(received-temp<10000){//下負載均衡流表httpRequest(url24,"PUT",8);httpRequest(url14,"PUT",9);}else if(received-temp>10000 ){httpRequest(url21,"PUT",2);httpRequest(url12,"PUT",4);}temp = received;}// jsonObject = httpRequest(url1,"PUT");} }演示視頻
https://pan.baidu.com/s/1htkKLPM
程序分工
在最后的這次作業中主要負責查找相關的資料，以及輔助部分代碼的編寫
課程總結
這學期的SDN這門課對我來說，讓我對現在網絡前沿的發展方向有了一個大體的認識。在平時的上課與作業中學會了建立結構比較簡單的拓撲，以及用python模仿編寫的腳本來建立拓撲圖。另外，還學會了利用ODL下發流表，不得不說我從中收獲了很多。
轉載于:https://www.cnblogs.com/dark-Earl/p/8342475.html
總結
