实践NGINX Load Balancing – HTTP Load Balancer

nginx是一款由俄罗斯人开发的web服务器/反向代理服务器/email服务器/负载均衡器软件,并在一个BSD-like 协议下发行,目前比较流行,最初近适用于Linux平台,目前已有Windows平台版本,优点是资源消耗少、并发处理能力强。

具体的使用的场景参考:Nginx官方参考文档。

具体平台版本见:http://nginx.org/packages/

实验环境:

1,Win7(192.168.84.1)加虚拟机CentOS7(192.168.84.128)

2,Win7下tomcat:apache-tomcat-7.0.68,CentOS7下tomcat:apache-tomcat-7.0.70

3,CentOS7中安装Nginx版本:nginx-1.10.1

CentOS7中安装nginx-1.10.1:

我下载的是源码编译版:nginx-1.10.1.tar.gz,编译安装稳定版需要安装好gcc、gcc-c++、openssl-devel、pcre-devel、zlib-devel,并下载pcre-devel、zlib-devel的源码。

1,解压nginx源码后的目录下,执行:

./configure \
--conf-path=/etc/nginx/nginx.conf \
--error-log-path=/var/log/nginx/error.log \
--http-log-path=/var/log/nginx/access.log \
--pid-path=/var/run/nginx/nginx.pid \
--lock-path=/var/lock/nginx.lock \
--with-zlib=/home/merrick/zlib-1.2.8 \
--with-pcre=/home/merrick/pcre-8.38 \
--user=nginx \
--group=nginx \
--with-http_ssl_module \
--with-http_flv_module \
--with-http_stub_status_module \
--with-http_gzip_static_module \
--http-client-body-temp-path=/var/tmp/nginx/client/ \
--http-proxy-temp-path=/var/tmp/nginx/proxy/ \
--http-fastcgi-temp-path=/var/tmp/nginx/fcgi/
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2,编译,安装:

[root@localhost nginx-1.10.1]# make & make install


3,启动,停止:

启动:/usr/local/nginx/sbin/nginx

停止:查到nginx主进程号后(master进程),执行kill -QUIT 主进程号

配置负载均衡:

1,配置/etc/nginx/nginx.conf(参考https://www.nginx.com/resources/admin-guide/load-balancer/):

worker_processes  1;

events {
    worker_connections  1024;
}

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  on;
    
    upstream backend{
	
	server 192.168.84.128:8080 weight=5 max_fails=2 fail_timeout=600s;
	server 192.168.84.1:8080 weight=4 max_fails=2 fail_timeout=600s;

    }	


    server {
        listen 192.168.84.128:80;
        server_name  localhost;

        #charset koi8-r;
	access_log  logs/host.access.log  main;

        location / {
	    
     	    proxy_pass http://backend;
	    
         #   root   html;
         #   index  index.html index.htm;
        }

	location /NginxStatus {
		stub_status on;
		access_log off;
		
	}
	

        error_page   500 502 503 504  /50x.html;
        	location = /50x.html {
            	root   html;
       }}


2,启动win7下和centos7下的tomcat

3,在win7下访问centos7的80主页测试几次:

可以看到访问nginx这个代理服务器时会随机转到两个web主页:

实践NGINX Load Balancing – HTTP Load Balancer

实践NGINX Load Balancing – HTTP Load Balancer