Nginx+Tomcat集群与负载均衡

架构描述

前端一台nginx服务器做负载均衡器,后端放N台tomcat组成集群处理服务,通过nginx转发到后面(注:没做动静分离,静态动态全部都转给tomcat)
优点:实现了可弹性化的架构,在压力增大的时候可以临时添加tomcat服务器添加到这个架构里面去.

先修改nginx.conf配置

如想了解Nginx负载均衡策略,请查阅Nginx负载均衡策略.

user nginx;  worker_processes 10;  worker_rlimit_nofile 100000;     error_log  /var/log/nginx/error.log;  #error_log /var/log/nginx/error.log notice;  #error_log /var/log/nginx/error.log info;     pid /var/run/nginx.pid;     events {   worker_connections 1024;   use epoll;  }     http {   include /etc/nginx/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"';      access_log /var/log/nginx/access.log main;      sendfile on;   tcp_nopush on;   tcp_nodelay on;   server_tokens off;   gzip on;   gzip_static on;   gzip_comp_level 5;   gzip_min_length 1024;   keepalive_timeout 65;   limit_conn_zone $binary_remote_addr zone=addr:10m;      # Load config files from the /etc/nginx/conf.d directory   include /etc/nginx/conf.d/*.conf;      upstream www.wp.com {    #此处为轮询策略 换成你自己的tomcat地址    #可以根据自己的需求配置多个tomcat,当某个地址无效时,nginx会自动切换    server 192.168.5.206:8081;    server 192.168.5.206:8082;   }      server {    #配置对应的端口与域名    listen 80;    server_name www.wp.com;       #charset koi8-r;       #access_log logs/host.access.log main;    location / {     root html;     index index.html index.htm;     #配置上面的server name     proxy_pass http://www.wp.com;     proxy_set_header X-Real-IP $remote_addr;    }       location ~ ^/(WEB-INF)/ {     deny all;    }       error_page 404 /404.html;       location = /404.html {     root /usr/share/nginx/html;    }       # redirect server error pages to the static page /50x.html    error_page 500 502 503 504 /50x.html;    location = /50x.html {     root /usr/share/nginx/html;    }   }  }

修改tomcat配置

找到TOMCAT_HOME/conf/server.xml,在host标签处加入Context标签
注意:如果是单机启动多tomcat需要改变对应的port,否则会启动不了,多机tomcat无此情况

<Context docBase="/opt/tomcat/cluster01/webapps/ROOT" path="" />