Nginx 负载配置

#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;

    #服务器列表,NET5WebApi 服务列表名称
    # 有一个服务器列表，在配置文件的server节点之外增加一个服务器列表 upsteam ,列表名称 Net5webapi
    upstream NET5WebApi  #NET5WebApi 自定义个名称
    {
        server localhost:9001;
        server localhost:9002;
        server localhost:9003;
    }
    
    

    server {
        listen       8088;
        server_name  localhost;

        #charset koi8-r;

        #access_log  logs/host.access.log  main;

        location / {
            
            #设置转发：就是把nginx作为代理
            #设置代理转发地址
            #proxy_pass http://localhost:9001;
            
            #让服务器列表生效
            proxy_pass http://NET5WebApi;
        }

        location /WeatherForecast {
            proxy_pass http://localhost:9002;
        }

        #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;
    #    }
    #}

}

橙色是主要配置信息；

如果有一个服务器挂了，比如：localhost:9001 服务区器挂了，Nginx还能继续访问9001吗？不能Nginx只会访问正常工作的服务器。如果9001 恢复正常工作时，Nginx会继续正常访问吗？会的，正常访问不受影响。

    upstream NET5WebApi  #NET5WebApi 自定义个名称
    {
        server localhost:9001 weight=20;  #9001处理 20次
        server localhost:9002 weight=30;  #9002处置 30次
        server localhost:9003 weight=50;  #9003处置 50次
        #weight权重，根据服务器性能，适当的分配请求数量，数字越大分配的请求数量越多。
    }