How to implement Nginx reverse proxy and load balancing (based on Linux)

upstream backend {
  #The larger the proxy IP weight is, the more traffic it receives. On the contrary, server localhost:8084 weight=50;
  server localhost:8088 weight=50;
}

# / all load balancing + reverse proxy location / {
      root /data/wwwroot1;
      index index.html index.htm;#index file proxy_pass http://backend;
    }

#user nobody;
# worker process usually sets the number of CPUs * the number of cores worker_processes 1;
 
#error_log logs/error.log;
#error_log logs/error.log notice;
#error_log logs/error.log info;
 
#pid logs/nginx.pid;
 
# Set connection properties events {
  worker_connections 1024;#How many connections does one worker generate}
 
# Configure the main section of the HTTP server 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 compression function set gzip on;
  gzip_min_length 1k;
  gzip_buffers 4 16k;
  gzip_http_version 1.0;
  gzip_comp_level 6;
  gzip_types text/plain text/css text/javascript application/json application/javascript application/x-javascript application/xml;
  gzip_vary on;
   
  #Set the load balancing backend server list upstream backend {
    #The larger the proxy IP weight is, the more traffic it receives. On the contrary, server localhost:8084 weight=50;
    server localhost:8088 weight=50;
  }
   
   
   
  server {
    listen 2022;
    server_name localhost;
    charset utf-8;
    access_log logs/wwwroot2.access.log main;
    location / {
      root /data/wwwroot2;
      index index.html index.htm;#index file}
  }
  # Virtual host section server {
    listen 80;
    server_name localhost;
    root /data/wwwroot1;
    charset utf-8;
    #Access log access_log logs/wwwroot1.access.log main;
    # / all load balancing + reverse proxy location / {
      root /data/wwwroot1;
      index index.html index.htm;#index file proxy_pass http://backend;
    }
 
    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;
  # }
  #}
 
}