nginx配负载均衡

参考：http://blog.csdn.net/e421083458/article/details/30086413

1、开两个centos虚拟机分别跑两个tomcat

ip分别是

192.168.153.129:8080

192.168.153.130:8080

2、修改nginx的配置文件nginx.conf

#user  nobody;worker_processes  1;#error_log  logs/error.log;#error_log  logs/error.log  notice;#error_log  logs/error.log  info;#pid        logs/nginx.pid;events {    worker_connections  1024;}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"';    #access_log  logs/access.log  main;    sendfile        on;    #tcp_nopush     on;    #keepalive_timeout  0;    keepalive_timeout  65;    #gzip  on;upstream localhost {      server 192.168.153.129:8080 weight=10;     server 192.168.153.130:8080 weight=1;      }      server {        listen       8085;        server_name  localhost;        #charset koi8-r;        #access_log  logs/host.access.log  main;        location / {            root   html;            index  index.html index.htm;proxy_pass       http://localhost;    proxy_set_header   Host             $host;    proxy_set_header   X-Real-IP        $remote_addr;    proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for;        }        #error_page  404              /404.html;        # redirect server error pages to the static page /50x.html        #        error_page   500 502 503 504  /50x.html;        location = /50x.html {            root   html;        }        # proxy the PHP scripts to Apache listening on 127.0.0.1:80        #        #location ~ \.php$ {        #    proxy_pass   http://127.0.0.1;        #}        # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000        #        #location ~ \.php$ {        #    root           html;        #    fastcgi_pass   127.0.0.1:9000;        #    fastcgi_index  index.php;        #    fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;        #    include        fastcgi_params;        #}        # deny access to .htaccess files, if Apache's document root        # concurs with nginx's one        #        #location ~ /\.ht {        #    deny  all;        #}    }    # another virtual host using mix of IP-, name-, and port-based configuration    #    #server {    #    listen       8000;    #    listen       somename:8080;    #    server_name  somename  alias  another.alias;    #    location / {    #        root   html;    #        index  index.html index.htm;    #    }    #}    # HTTPS server    #    #server {    #    listen       443 ssl;    #    server_name  localhost;    #    ssl_certificate      cert.pem;    #    ssl_certificate_key  cert.key;    #    ssl_session_cache    shared:SSL:1m;    #    ssl_session_timeout  5m;    #    ssl_ciphers  HIGH:!aNULL:!MD5;    #    ssl_prefer_server_ciphers  on;    #    location / {    #        root   html;    #        index  index.html index.htm;    #    }    #}}

主要修改几个地方

（1）添加反向代理的服务端

upstream localhost {      server 192.168.153.129:8080 weight=10;     server 192.168.153.130:8080 weight=1;      } 

（2）修改server_name

server_name  localhost;

（3）修改location，添加代理

location / {            root   html;            index  index.html index.htm;    proxy_pass       http://localhost;            proxy_set_header   Host             $host;            proxy_set_header   X-Real-IP        $remote_addr;            proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for;        }

3、运行nginx，像访问tomcat一样访问127.0.0.1:8085，这里端口我配置8085