Linux system configuration of nginx load balancing

Details of Linux system configuration of nginx load balancing

Several ways of load balancing:

1. Polling: by default, all servers will be accessed one by one in chronological order. If any server goes down, it will be deleted automatically.

2.weight: the bearing probability of the server is proportional to weight, which can be configured when the server is not evenly configured;

3.ip_hash: calculate hash for ip of each request, and assign the corresponding server according to the rules set in 1 (session sharing can be solved);

4.fair: requests are allocated according to the response time of each server (rt). rt knows the priority allocation;

5.url_hash: requests are allocated according to the hash value of access to url;

NGINX profile:

user nginx;
worker_processes auto;
error_log /var/log/nginx/error.log;
pid /run/nginx.pid;

events {
  worker_connections 1024;
}

http {
  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 /var/log/nginx/access.log main;

  sendfile      on;
  tcp_nopush     on;
  tcp_nodelay     on;
  keepalive_timeout  65;
  types_hash_max_size 2048;
  
  
  include       blockip.conf;    # screening IP
  include       /etc/nginx/mime.types;
  default_type    application/octet-stream;

  # Load modular configuration files from the /etc/nginx/conf.d directory.
  # See http://nginx.org/en/docs/ngx_core_module.html#include
  # for more information.
  include /etc/nginx/conf.d/*.conf;

  upstream www. The domain name .com {
  server IP1: port ;            # The server 1
  server IP2: port ;            # The server 2
  ip_hash;               # Rules for load balancing 
  }

  server {
    listen    80 default_server;   #NGINX  The service domain name to point to 
    listen    [::]:80 default_server;
    server_name IP;           #NGINX  Pointed server  IP
    root     /usr/share/nginx/html; #NGINX HTML  directory 

    # Load configuration files for the default server block.
    include /etc/nginx/default.d/*.conf;

    location / {
      proxy_pass  http://www. The domain name .com; #nginx Pointed domain name 
   }

    error_page 404 /404.html;
      location = /40x.html {      #404 page 
    }

    error_page 500 502 503 504 /500.html;
      location = /500.html {      #500 page 
    }
  }
}

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