tomcat利用nginux进行负载均衡

2020/12/14 23:46:39

1、下载nginx,http://nginx.org/en/download.html

2、解压后双击nginx.exe文件或通过cmd进入解压目录执行nginx.exe启动服务,关闭服务需要通过cmd进入解压目录执行nginx -s stop,启动后访问localhost可以进入欢迎页。

3、复制3个tomcat,分别命名tomcat_1、tomcat_2、tomgcat_3,将各自端口进行修改为8080、8081、8082。

4、在nginx目录的conf中修改nginx.conf文件。

#user  nobody;
worker_processes  4;    # 工作进程的个数,一般与计算机的cpu核数一致

#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;    # 单个进程最大连接数(最大连接数 = 连接数 * 进程数)
}


http {
    include       mime.types;     # 文件扩展名与文件类型映射表
    default_type  application/octet-stream;    # 默认文件类型

    #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;    # 开启高效文件传输模式,sendfile指令指定nginx是否调用sendfile函数来输出文件,对于普通应用设为on,如果用来进行下载等应用磁盘IO重负载应用,可设置为off,以平衡磁盘与网络I/O处理速度,降低系统的负载。注意:如果图片显示不正常把这个改成off。
    #tcp_nopush     on;

    #keepalive_timeout  0;
    keepalive_timeout  65;    # 长连接超时时间,单位是秒

    #gzip  on;    # 启用Gizp压缩

    #服务器的集群
    upstream zsq {  # 服务器集群名字
        server    127.0.0.1:8080  weight=1;    # 服务器配置   weight是权重的意思,权重越大,分配的概率越大。
        server    127.0.0.1:8081  weight=2;
		server    127.0.0.1:8082  weight=3;
    }

    # 当前的Nginx的配置
    server {
        listen       80;    # 监听80端口,可以改成其他端口
        server_name  localhost;    # 当前服务的域名

        #charset koi8-r;

        #access_log  logs/host.access.log  main;

        location / {
            # root   html;
            # index  index.html index.htm;
            proxy_pass http://zsq;# 访问地址
            proxy_redirect default;
        }

        #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;
    #    }
    #}

}

4、分别启动三个tomcat,最后启动nginx,访问http://localhost,会随机进入到8080/8081/8082中。