Nginx tomcat 集群负载均衡解决笔记

1. Windows

下载nginx 地址：http://nginx.org/   本文章使用的版本为1.5.1

下载完后解压，在conf目录修改nginx.conf我的配置如下：

#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;
    
    client_header_timeout  3m;  
    client_body_timeout    3m;  
    send_timeout           3m;  
   
    client_header_buffer_size    1k;  
    large_client_header_buffers  4 4k;  

    sendfile        on;
    tcp_nopush      on;  
    tcp_nodelay     on;
    #tcp_nopush     on;
    

    #keepalive_timeout  0;
    keepalive_timeout  65;

    #gzip  on;

　　　upstream localhost {
　　  #根据ip计算将请求分配各那个后端tomcat，许多人误认为可以解决session问题，其实并不能。
　　  #同一机器在多网情况下，路由切换，ip可能不同
 　　 #ip_hash;
　　  server localhost:9097 weight=1;
　　  server localhost:9098 weight=1;
　　  server localhost:9097 backup;
　　  server localhost:9098 backup;
　　  #jvm_route $cookie_JSESSIONID|sessionid reverse; #session复制的配置
　　  ip_hash;
　　  }

     
    upstream backend {
        server localhost:9097;
        server localhost:9098;
    }

    server {
        listen       9096;
        server_name  localhost;

        #charset koi8-r;

        #access_log  logs/host.access.log  main;

        location ~ ^/(WEB-INF)/ {  
            deny all;  
        }  
  
        ###所以的静态文件人gif、jpg等都在本地打开，存放的目录为html，保存时间为30天  
        location ~ .*\.(gif|jpg|jpeg|png|bmp|swf|css|js|htm|html)$ {  
            root html;  
            access_log off;  
            expires 30d;  
        }
        location / {
            root   html;
            index  index.jsp;
            #include     proxy.conf;  #这个文件是我们新建的，要导入
            proxy_pass   http://localhost;
            proxy_redirect    off;#default
            proxy_set_header   Host $host;
            proxy_set_header   X-Real-IP $remote_addr;
            proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for; 
            client_max_body_size   10m;
            client_body_buffer_size   128k;
            proxy_connect_timeout   3; #90
            proxy_send_timeout   3; #90
            proxy_read_timeout   3; #90
            proxy_buffer_size   4k;
            proxy_buffers   4 32k;
            proxy_busy_buffers_size   64k;
            proxy_temp_file_write_size  64k;  
        }

        #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;
    #    server_name  localhost;

    #    ssl                  on;
    #    ssl_certificate      cert.pem;
    #    ssl_certificate_key  cert.key;

    #    ssl_session_timeout  5m;

    #    ssl_protocols  SSLv2 SSLv3 TLSv1;
    #    ssl_ciphers  HIGH:!aNULL:!MD5;
    #    ssl_prefer_server_ciphers   on;

    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}

}

下载Tomcat

修改端口为9097

另一个修改为9098

分别启动二个tomcat和nginx在地址栏中输入http://locahost/则可以看到tomcat欢迎界面了

Linux 和window配置基本一样，只有linux下tomcat的配置要注意，需要添加环境变量