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nginx负载均衡多个tomcat实例
阅读量:127 次
发布时间:2019-02-27

本文共 2995 字,大约阅读时间需要 9 分钟。

一、架构图

本地项目启动时,我们需要确保各个组件能够协同工作。通过上述配置,我们可以实现多个Tomcat实例的高效管理。此外,Nginx作为反向代理,能够将请求正确转发至对应的服务。

二、启动本地项目

在启动多个本地项目时,建议使用命令行工具。切换至目标目录(如`target`),使用默认端口9000启动第一个实例: `java -jar springboot-redis-cache-breakdown-0.0.1-SNAPSHOT.jar` 接着启动第二个实例,指定不同的端口: `java -jar springboot-redis-cache-breakdown-0.0.1-SNAPSHOT.jar --server.port=9001` 启动完成后,可以通过访问特定端口确认实例是否正常运行。

三、修改Nginx配置

为了支持多个Tomcat实例的负载均衡,我们需要配置Nginx。建议使用固定IP地址(如v8IP)以确保配置稳定。以下是Nginx配置示例:
user www www;worker_processes auto;error_log /usr/local/webserver/nginx/logs/nginx_error.log crit;pid /usr/local/webserver/nginx/nginx.pid;worker_rlimit_nofile 65535;events {    use epoll;    worker_connections 65535;}http {    include mime.types;    default_type application/octet-stream;    log_format main '$remote_addr - $remote_user [$time_local] "$request" "$status $body_bytes_sent "$http_referer" "$http_user_agent" $http_x_forwarded_for';        charset gb2312;    server_names_hash_bucket_size 128;    client_header_buffer_size 32k;    large_client_header_buffers 4 32k;    client_max_body_size 8m;    sendfile on;    tcp_nopush on;    keepalive_timeout 60;    tcp_nodelay on;        fastcgi_connect_timeout 300;    fastcgi_send_timeout 300;    fastcgi_read_timeout 300;    fastcgi_buffer_size 64k;    fastcgi_buffers 4 64k;    fastcgi_busy_buffers_size 128k;    fastcgi_temp_file_write_size 128k;    gzip on;    gzip_min_length 1k;    gzip_buffers 4 16k;    gzip_http_version 1.0;    gzip_comp_level 2;    gzip_types text/plain application/x-javascript text/css application/xml;    gzip_vary on;        upstream callback {        server 192.168.254.10:9000;        server 192.168.254.10:9001;    }        server {        listen 80;        server_name bingbing.com;        index index.html index.htm index.php;        root /usr/local/webserver/nginx/html;                location / {            proxy_pass http://callback;        }                location ~ .*\.(php|php5)?$ {            fastcgi_pass 127.0.0.1:9000;            fastcgi_index index.php;            include fastcgi.conf;        }                location ~ .*\.(gif|jpg|jpeg|png|bmp|swf|ico)$ {            expires 30d;        }                location ~ .*\.(js|css)?$ {            expires 15d;        }                access_log off;    }}

Java代码示例

以下是用于测试Nginx代理功能的Java控制器代码:
package com.hand.redis.web;import org.springframework.beans.factory.annotation.Value;import org.springframework.web.bind.annotation.GetMapping;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RestController;@RestController@RequestMapping("/callback")public class RedisStockController {    @Value("${server.port}")    private String port;        @GetMapping    public String testNginx() {        return "欢迎你,nginx!";    }        @GetMapping("/test01")    public String LoadBalance() {        return "欢迎你,nginx!实例为:" + port;    }}
访问测试
通过上述配置,我们可以在浏览器中访问指定地址,验证Nginx是否正确代理请求。例如,访问`http://localhost:8080/test`可以查看当前实例信息。通过这种方式,我们可以轻松在不同Tomcat实例之间切换。

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