How to use nginx as HTTP load balancer
- Users visit http://www.meterpreter.org and load balance them to four servers: 192.168.1.2:80, 92.168.1.3:80, 192.168.1.4:80, 192.168.1.5:80
- Users visit http://new.meterpreter.org and load balance them to ports 8080, 8081 and 8082 of the 192.168.1.7 server.
user www www;
worker_processes 10;
#error_log logs/error.log;
#error_log logs/error.log notice;
#error_log logs/error.log info;
#pid logs/nginx.pid;
worker_rlimit_nofile 51200;
events
{
use epoll;
worker_connections 51200;
}
http
{
include conf/mime.types;
default_type application/octet-stream;
keepalive_timeout 120;
tcp_nodelay on;
upstream www.meterpreter.org {
server 192.168.1.2:80;
server 192.168.1.3:80;
server 192.168.1.4:80;
server 192.168.1.5:80;
}
upstream new.meterpreter.org {
server 192.168.1.7:8080;
server 192.168.1.7:8081;
server 192.168.1.7:8082;
}
server
{
listen 80;
server_name www.meterpreter.org;
location / {
proxy_pass http://www.meterpreter.org;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
}
log_format www_s135_com ‘$remote_addr – $remote_user [$time_local] $request ‘
‘”$status” $body_bytes_sent “$http_referer” ‘
‘”$http_user_agent” “$http_x_forwarded_for”‘;
access_log /data1/logs/www.log www_s135_com;
}
server
{
listen 80;
server_name new.meterpreter.org;
location / {
proxy_pass http://new.meterpreter.org;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
}
log_format blog_s135_com ‘$remote_addr – $remote_user [$time_local] $request ‘
‘”$status” $body_bytes_sent “$http_referer” ‘
‘”$http_user_agent” “$http_x_forwarded_for”‘;
access_log /data1/logs/blog.log blog_s135_com;
}
}
- server: Specify the name of the backend server and some parameters. You can use the domain name, IP, port, or Unix socket. If specified as a domain name, it is resolved to IP first.
- upstream: This field sets up a group of servers. This field can be placed in the proxy_pass and fastcgi_pass instructions as a separate entity. They can be servers listening on different ports, and they can also be servers listening on both TCP and Unix sockets.
- proxy_pass: This command sets the address of the proxy server and the mapped URI. The address can be in the form of a hostname or IP plus port number.
- proxy_set_header: This directive allows you to redefine or add fields to the request header sent to the proxy server. This value can be a text, a variable, or a combination of them.
