Niginx 集群負(fù)載均衡策略

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?所需物料

1.Nginx服務(wù)

步驟略

本人 nginx version: nginx/1.16.0

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2.Java Servlet 測試項(xiàng)目

新建java web 項(xiàng)目，項(xiàng)目名稱為：tt

import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse;@WebServlet("/IndexServlet") public class IndexServlet extends HttpServlet {private static final long serialVersionUID = 1L;public IndexServlet() { }protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {//輸出Session的IdSystem.out.println("[session-id]\t"+request.getSession().getId());//制造網(wǎng)絡(luò)請求延遲效果try {System.out.println("[-線程睡眠中-]");Thread.sleep(3000);System.out.println("[-線程睡眠結(jié)束-]");} catch (InterruptedException e) {e.printStackTrace();}System.out.println("");System.out.println("");System.out.println("");response.getWriter().append("Served at: ").append(request.getContextPath());}protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {doGet(request, response);}}

3.tomcat部署服務(wù)

共啟用了3個Tomcat，服務(wù)端口分別是：8081、8082、8083；

分別訪問?http://localhost:8081/tt/index

分別訪問?http://localhost:8082/tt/index

分別訪問?http://localhost:8083/tt/index

進(jìn)行服務(wù)驗(yàn)證，看服務(wù)是否可以正常訪問

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集群調(diào)度：輪詢（默認(rèn)）

調(diào)度規(guī)則：輪詢調(diào)取集群中的服務(wù)；

修改?nginx.conf 配置文件，重啟Nginx；

worker_processes 1;events {worker_connections 1024; }http {include mime.types;default_type application/octet-stream;sendfile on;keepalive_timeout 65;#配置集群集合upstream tomcatserver1 {server 127.0.0.1:8081;server 127.0.0.1:8082; server 127.0.0.1:8083; } server { listen 80; server_name localhost; location / { proxy_pass http://tomcatserver1; index index.html index.htm; } error_page 500 502 503 504 /50x.html;location = /50x.html {root html;}}}

瀏覽器多次訪問??http://localhost/tt/index 進(jìn)行測試。會看到3個Tomcat 被輪訓(xùn)調(diào)用。

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集群調(diào)度：ip_hash

調(diào)度規(guī)則：同一個session會被分配到同一個 服務(wù)中，主要解決集群session問題；

修改?nginx.conf 配置文件，重啟Nginx；

worker_processes 1;events {worker_connections 1024; }http {include mime.types;default_type application/octet-stream;sendfile on;keepalive_timeout 65;#配置集群集合upstream tomcatserver1 {#調(diào)度方式 ip_haship_hash; server 127.0.0.1:8081;server 127.0.0.1:8082; server 127.0.0.1:8083; } server { listen 80; server_name localhost; location / { proxy_pass http://tomcatserver1; index index.html index.htm; } error_page 500 502 503 504 /50x.html;location = /50x.html {root html;}}}

集群調(diào)度：Weight

調(diào)度規(guī)則：根據(jù)權(quán)重來處理，權(quán)重越高被調(diào)用的概率越高，主要用于后端服務(wù)器性能不均的情況；

修改?nginx.conf 配置文件，重啟Nginx；

worker_processes 1;events {worker_connections 1024; }http {include mime.types;default_type application/octet-stream;sendfile on;keepalive_timeout 65;#配置集群集合upstream tomcatserver1 {#調(diào)度方式 Weightserver 127.0.0.1:8081 weight=3;server 127.0.0.1:8082 weight=2; server 127.0.0.1:8083 weight=1; } server { listen 80; server_name localhost; location / { proxy_pass http://tomcatserver1; index index.html index.htm; } error_page 500 502 503 504 /50x.html;location = /50x.html {root html;}}}

集群調(diào)度：url_hash

調(diào)度規(guī)則：相同的url地址會被分配到同一個服務(wù)器，用于緩存數(shù)據(jù)，如：我將系統(tǒng)圖片都緩存在了8081、8082服務(wù)器，每當(dāng)我請求圖片的時候必須去請求8081 或 8082服務(wù)器；

修改?nginx.conf 配置文件，重啟Nginx；

worker_processes 1;events {worker_connections 1024; }http {include mime.types;default_type application/octet-stream;sendfile on;keepalive_timeout 65;#配置集群集合upstream tomcatserver1 {#調(diào)度方式 url_hashhash $request_uri;server 127.0.0.1:8081;server 127.0.0.1:8082; server 127.0.0.1:8083; } server { listen 80; server_name localhost;# 假如請求靜態(tài)資源的路徑格式是 localhost:80/tt/state/xx/xx/…… location /tt/state { proxy_pass http://tomcatserver1; index index.html index.htm; } error_page 500 502 503 504 /50x.html;location = /50x.html {root html;}}}

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轉(zhuǎn)載于:https://www.cnblogs.com/devan/p/11237016.html

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