一、目標

1. Windows下，下載安裝nginx
2. Nginx常用命令
3. Nginx負載均衡兩個tomcat
4. Nginx配置多個負載均衡服務

二、下載安裝nginx

下載地址http://nginx.org/en/download.html

版本nginx-1.14.1

無需安裝，解壓後直接使用即可。

啟動後，瀏覽器輸入localhost, 驗證nginx是否安裝啟動成功。

三、Nginx常用命令

1、啟動（命令列）：start nginx

2、關閉（命令列）：nginx –s stop

3、重新載入配置：nginx –s reload

4、測試配置是否正確：nginx –t

5、注意

有時執行了關閉命令，nginx程序任然存在，需要在工作管理員中將nginx程序殺掉。否則會導致nginx的最新配置無法生效。

四、Nginx負載均衡兩個tomcat

修改nginx-1.14.1\conf的nginx.conf

1. 在#gzip  on;下方新增：

upstream www.hcbtest.com{

       server 127.0.0.1:8080 weight=2;       

server 127.0.0.1:9090 weight=3;

    }

1. 修改location /，修改為：

location / {

            root   html;

            index  index.html index.htm;

            proxy_pass http://www.hcbtest.com; 

            proxy_redirect default; 

       }

1. 修改server埠:

listen       10080;

 server_name  localhost;

1. Tomcat調整：

保證tomcat的自帶工程root是存在的；把兩個tomcat的index.jsp內容進行修改，修改成不同的頁面顯示效果，用以體現負載均衡效果。

1. 瀏覽器輸入localhost:10080，多次重新整理瀏覽器，可見有時呈現的是tomcat1的index.jsp頁面，有時呈現的是tomcat2的index.jsp的頁面。

五、Nginx配置多個負載均衡服務

只需基於上述的配置，繼續新增如下配置即可：

1、

   upstream www.hcbtest2.com{

          server 127.0.0.1:8080 weight=3;

          server 127.0.0.1:9090 weight=2;

   }

2、 server {

        listen       10081;

        server_name  localhost;

        #charset koi8-r;

        #access_log  logs/host.access.log  main;

        location / {

            root   root;

            index  index.html index.htm index.jsp;

            proxy_pass http://www.hcbtest2.com/examples/; 

            proxy_redirect default; 

        }

3、保證tomcat自帶的examples工程是存在的；

4、把兩個tomcat的examples工程index.jsp內容進行修改，修改成不同的頁面顯示效果，用以體現負載均衡效果。

5、瀏覽器輸入localhost:10081，多次重新整理瀏覽器即可呈現不同的介面。

六、nginx完整配置檔案

#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 www.hcbtest.com{
	       server 127.0.0.1:8080 weight=2;#預設為權重，訪問7088和9080 埠的比例為1：1
	       server 127.0.0.1:9090 weight=3;
	}

	upstream www.hcbtest2.com{
	       server 127.0.0.1:8080 weight=3;#預設為權重，訪問7088和9080 埠的比例為1：1
	       server 127.0.0.1:9090 weight=2;
	}
	
    server {
        listen       10080;
        server_name  localhost;

        #charset koi8-r;

        #access_log  logs/host.access.log  main;

        location / {
            root   html;
            index  index.html index.htm;
            
            proxy_pass http://www.hcbtest.com;  
            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;
        #}
    }

	server {
        listen       10081;
        server_name  localhost;

        #charset koi8-r;

        #access_log  logs/host.access.log  main;

        location / {
            root   root;
            index  index.html index.htm index.jsp;
            
            proxy_pass http://www.hcbtest2.com/examples/;  
            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;
    #    }
    #}

}