nginx 负载均衡

#y
proxy_connect_timeout 2s;
	
	
	upstream tomcat_pool {
		server 10.10.1.144:8080;
		server 10.10.1.152:80;
		server 10.10.1.155:8080;
	}
	
	upstream report_pool {
		server	10.10.1.150:8080;
		#server 127.0.0.1:8081 down;
	}
#y

 

server {
        listen       80;
        server_name  localhost;

        #charset koi8-r;

        #access_log  logs/host.access.log  main;

        #location / {
        #    root   html;
        #    index  index.html index.htm;
        #}
		proxy_buffer_size	16k;
		proxy_buffers	4 16k;

        location / {
			proxy_pass http://tomcat_pool/;
			proxy_set_header Host $host;
			proxy_set_header X-Real-IP $remote_addr;
			proxy_set_header REMOTE-HOST $remote_addr;
			proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;   
		}

 

 

举例：

 

#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 kettas{
		 server 127.0.0.1:8080;
         server 127.0.0.1:8090;
		 ip_hash ;
	}
    server {
        listen       80;
        server_name  localhost;

        #charset koi8-r;

        #access_log  logs/host.access.log  main;
		
		location / {
			#root   html;
            proxy_pass http://kettas;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;  
            proxy_set_header REMOTE-HOST $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;
    #    }
    #}

}

 

   注意：

   nginx不支持session共享，可以用ip_hash方案解决（上例），昨天遇到一个问题是上传文件出错的问题。（于是用chrome跟踪发现了413异常。问了下度娘她说是nginx默认的上传文件大小受限制。）于是有了以下的配置：

在nginx.conf的http{}中增加
client_max_body_size 20m;