load balance

root@f86531f48431:/etc/nginx/conf.d# ls
default.origin  load_balance.conf  server1.conf  server2.conf  server3.conf
root@f86531f48431:/etc/nginx/conf.d# cat server1.conf 
server {
  listen 80;
  server_name localhost;
  location / {
    root /home/html1;
    index index.html;
  }
  location /srvc2 {
    proxy_pass http://localhost:8002/;
  }
  location /srvc3 {
    proxy_pass http://localhost:8003/;
  }
  location /srvc4 {
    proxy_pass http://localhost:8004/;
  }
  error_page 404 400 401 /error4xx.html;
}
root@f86531f48431:/etc/nginx/conf.d# cat load_balance.conf 
upstream services{
  server localhost:8002;
  server localhost:8003;
}
server {
  listen 8004;
  server_name localhost;
  location / {
    proxy_pass http://services;
  }
}
root@f86531f48431:/etc/nginx/conf.d# cat server2.conf 
server {
  listen 8002;
  server_name localhost;
  location / {
    root /home/html2;
    index index.html;
  }
}
root@f86531f48431:/etc/nginx/conf.d# cat server3.conf 
server {
  listen 8003;
  server_name localhost;
  location / {
    root /home/html3;
    index index.html;
  }
}