nginx负载均衡多个tomcat实例
一、架构图

二、启动本地项目
idea 2018暂时不能使用springboot的形式启动多个tomcat实例,就只好用命令实现多个应用实例的启动,首先切换至target目录使用默认端口9000启动:
java -jar springboot-redis-cache-breakdown-0.0.1-SNAPSHOT.jar
再启动一个实例:
java -jar springboot-redis-cache-breakdown-0.0.1-SNAPSHOT.jar --server.port=9001
2个实例启动完毕,如下:

三、修改nginx配置
注: 最好使用v8的ip,因为在之前我配的v8ip是固定的,ip为手动配置的,不变。添加的配置如下:

添加2台代理的tomcat服务器:
upstream callback{
server 192.168.254.10:9000;
server 192.168.254.10:9001;
}
location / {
proxy_pass http://callback;
}
注: location里的proxy_pass 地址如果不含有 / ,那么在访问的时候,location后的匹配符省略。
如果proxy_pass的地址后面包含 /,那么在访问的时候,需要在转发到主机后,添加location 后面的匹配符。
user www www;
worker_processes auto; #设置值和CPU核心数一致
error_log /usr/local/webserver/nginx/logs/nginx_error.log crit; #日志位置和日志级别
pid /usr/local/webserver/nginx/nginx.pid;
#Specifies the value for maximum file descriptors that can be opened by this process.
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;
#limit_zone crawler $binary_remote_addr 10m;
upstream callback{
server 192.168.254.10:9000;
server 192.168.254.10:9001;
}
#下面是server虚拟主机的配置
server
{
listen 80;#监听端口
server_name bingbing.com;#域名
index index.html index.htm index.php;
root /usr/local/webserver/nginx/html;#站点目录
location / {
proxy_pass http://callback;
}
location ~ .*\.(php|php5)?$
{
#fastcgi_pass unix:/tmp/php-cgi.sock;
fastcgi_pass 127.0.0.1:9000;
fastcgi_index index.php;
include fastcgi.conf;
}
location ~ .*\.(gif|jpg|jpeg|png|bmp|swf|ico)$
{
expires 30d;
# access_log off;
}
location ~ .*\.(js|css)?$
{
expires 15d;
# access_log off;
}
access_log off;
}
}
java代码为:
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;
/**
* 测试nginx是否可以代理
* @return
*/
@GetMapping
public String testNginx(){
return "欢迎你,nginx!";
}
@GetMapping("/test01")
public String LoadBalance(){
return "欢迎你,nginx!实例为:"+port;
}
}
访问如下地址,可以发现在不同的tomcat实例之间切换:


总结: 能够访问nginx的前提是先要与windowsping通,安装好nginx后能够进入到nginx首页,最好使用手动配置的v8的ip进行访问,使用WLAN的ip可能会变,负载均衡将无法进行。
使用nginx代理请求: https://blog.csdn.net/qq_33036061/article/details/104864609
使用nat模式连通windows并能够连上外网: https://blog.csdn.net/qq_33036061/article/details/104741517
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