Centos nginx Load Balancing implementation

I. Topology

Ii. Install software

Wget http://nginx.org/download/nginx-1.0.11.tar.gz
Wget ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/pcre-8.21.tar.gz

1. Install pcre

Tar zxvf pcre-8.21.tar.gz
Cd pcre-8.21
./Configure
Make & make install

2. Install nginx

Tar zxvf nginx-1.0.11.tar.gz
Cd nginx-1.0.11
Useradd-s/sbin/nologin www
./Configure -- user = www -- group = www -- prefix =/usr/local/nginx -- with-http_stub_status_module -- with-http_ssl_module
Make
Make install

3. Configure nginx

Cd/usr/local/nginx/
Cp nginx. conf nginx. conf. bak

Vi nginx. conf
######################################## #######################################
User www;
Worker_processes 1;
Error_log/usr/local/nginx/logs/nginx_error.log crit;
Pid/usr/local/nginx. pid;
Worker_rlimit_nofile 51200;
######################################## ######################################
Events {
Use epoll;
Worker_connections 51200;
}
######################################## ######################################
Http {
Include mime. types;
Default_type application/octet-stream;
Sendfile on;
Tcp_nopush on;
Keepalive_timeout 60;
Tcp_nodelay on;

######################################## ######################################
Upstream 192.168.1.250 {
Server 192.168.1.htm;
Server 192.168.1.252;
}
######################################## ######################################
Server
{
Listen 80;
Server_name www.test.com * .test.com;

Location /{
Proxy_pass http: // 192.168.1.250;

Proxy_set_header Host $ host;

Proxy_set_header X-Real-IP $ remote_addr;

Proxy_set_header X-Forwarded-For $ proxy_add_x_forwarded_for;
}
Location/nginx_status {
Stub_status on;
Access_log off;
Allow 192.168.1.253;
Deny all;
}

######################################## #######################################
Log_format www_test_com '$ remote_addr-$ remote_user [$ time_local] $ request'

'"$ Status" $ body_bytes_sent "$ http_referer "'

'"$ Http_user_agent" "$ http_x_forwarded_for "';
Access_log/usr/local/nginx/logs/nginx. log www_test_com;

}

}
######################################## ########################################

Iv. test whether the configuration is normal

[Root @ linux-1 conf] #/usr/local/nginx/sbin/nginx-t
Nginx: the configuration file/usr/local/nginx/conf/nginx. conf syntax is OK
Nginx: configuration file/usr/local/nginx/conf/nginx. conf test is successful

############################# The configuration is correct ######## ###########

5. Start and Stop nginx Server Load balancer

Start:

Ulimit-SHn 51200
/Usr/local/nginx/sbin/nginx

Stop:

Killall-9 nginx #### note that nginx can be started and stopped by writing a script.

Vi. Test

Web1 --------> ip: 192.168.1.20.------------> index.html -------------> the is web1

Web2 --------> ip: 192.168.1.252 ------------> index.html -------------> the is web2

Test results:

VII. simple use of the monitoring module (without the powerful ipvsadm like LVS, just a simple view)

Http: // 192.168.1.250/nginx_status

########################## Complete some simple load configuration ####### ################

8. briefly explain the configuration file (Please advise if there are any errors ):

Worker_processes 1; ### the general configuration is the same as the number of CPUs
Error_log/usr/local/nginx/logs/nginx_error.log crit; ### nginx error log usage

Use epoll; ### epoll Mode
Worker_connections 51200; ### maximum number of connections per process: 51200

Upstream 192.168.1.250 {
Server 192.168.1.htm;
Server 192.168.1.252;
############### This is the load, and the following is the back-end source server.

Location /{
Proxy_pass http: // 192.168.1.250;

Proxy_set_header Host $ host;

Proxy_set_header X-Real-IP $ remote_addr;

Proxy_set_header X-Forwarded-For $ proxy_add_x_forwarded_for;
########## Obtain the real IP address of the backend source Web server through X-Forwarded-

Location/nginx_status {
Stub_status on;
Access_log off;
Allow 192.168.1.253;
Deny all;
########### This is the simple monitoring of nginx status

This article from the "game technology blog" blog, please be sure to keep this source http://youzao.blog.51cto.com/3946111/751891