Nginx reverse proxy and server group status

Implementation of Nginx Proxy (seven-layer load balancing);

Topology diagram:

WEB01 WEB02

|192.168.1.20 |192.168.1.21

-----------------------------

|192.168.1.254

Nginx (reverse proxy);

|1.1.1.254

|

Client (1.1.1.1);

Requirements: client1.1.1.1 can be accessed through the reverse proxy 1.1.1.254 two Web services to the intranet, WEB01 performance is better, the weight value is two;

* * Due to the limited resources, with IP virtual host to implement two web; (Web server Apache);

Implementation process:

1. First configure two Web servers;

[Email protected] local]# ifconfig

Eth0 Link encap:ethernet HWaddr 00:0c:29:07:6d:a0

inet addr:192.168.1.20 bcast:192.168.1.255 mask:255.255.255.0

Inet6 ADDR:FE80::20C:29FF:FE07:6DA0/64 Scope:link

Up broadcast RUNNING multicast mtu:1500 metric:1

RX packets:30 errors:0 dropped:0 overruns:0 frame:0

TX packets:31 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:1000

RX bytes:4318 (4.2 KiB) TX bytes:5539 (5.4 KiB)

Eth0:1 Link encap:ethernet HWaddr 00:0c:29:07:6d:a0

inet addr:192.168.1.21 bcast:192.168.255.247 mask:255.255.255.0

Up broadcast RUNNING multicast mtu:1500 metric:1

To configure a virtual host:

[Email protected] conf.d]# vim virtualhost.conf

<virtualhost 192.168.1.20:80>

Documentroot/www

ServerName www.bxn.com

Customlog Logs/www20-access_log Common

</VirtualHost>

<virtualhost 192.168.1.21:80>

Documentroot/bbs

ServerName bbs.bxn.com

Customlog Logs/bbs21-access_log Common

</VirtualHost>

[Email protected] bbs]#/etc/init.d/httpd restart

[Email protected] bbs]# elinks--dump 192.168.1.20

192.168.1.20:www

[Email protected] bbs]# elinks--dump 192.168.1.21

192.168.1.21:bbs

Web service configuration completed;

2. Configure the Reverse proxy:

Installation Nginx process: Source installation: Write briefly;

Groupadd Nginx

Useradd-m-G Nginx

Yum install-y pcre Pcre-devel

Yum Install-y OpenSSL Openssl-devel

./configure--prefix=/usr/local/nginx--user=nginx--group=nginx--with-http_stub_status_module

Make && make install

Reverse proxy configuration:

[Email protected] nginx]# cd/usr/local/nginx/conf/

[Email protected] conf]# grep-v ' #\|^$ ' nginx.conf >nginx2.conf

[Email protected] conf]# vim nginx2.conf

Worker_processes 1;

Events {

Worker_connections 1024;

}

HTTP {

Include Mime.types;

Default_type Application/octet-stream;

Sendfile on;

Keepalive_timeout 65;

Upstream Webgrp {

Server 192.168.1.20 weight=2;

Server 192.168.1.10 weight=1;

}

Upstream is the key;

server {

Listen 80;

server_name localhost;

Location/{

root HTML;

Index index.html index.htm;

Proxy_pass http://webgrp//and this;

}

Error_page 502 503 504/50x.html;

Location =/50x.html {

root HTML;

}

}

}

[Email protected] sbin]#/usr/local/nginx/sbin/nginx-c/usr/local/nginx/conf/nginx2.conf

[Email protected] conf]# NETSTAT-TULNP |grep nginx

TCP 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 2590/nginx

3. In the client 1.1.1.1 test;

ELinks 1.1.1.254[[email protected] ~]# ifconfig eth0

Eth0 Link encap:ethernet HWaddr 00:0c:29:19:1b:0d

inet addr:1.1.1.1 bcast:1.1.1.255 mask:255.255.255.0

[Email protected] ~]# elinks--dump 1.1.1.254

192.168.1.21:bbs

[Email protected] ~]# elinks--dump 1.1.1.254

192.168.1.20:www

[Email protected] ~]# elinks--dump 1.1.1.254

192.168.1.20:www

[Email protected] ~]# elinks--dump 1.1.1.254

192.168.1.21:bbs

[Email protected] ~]# elinks--dump 1.1.1.254

192.168.1.20:www

[Email protected] ~]# elinks--dump 1.1.1.254

192.168.1.20:www

The client can see that the test has been successful;

* Knowledge Points:

Connection status of the server group: determines how the connection request is distributed:

Poll: Nginx default connection request distribution method;

Ip_hash: When the same client connects, only the same server is connected; (resolves the session problem);

Weight: Weight: Distribute the request according to the weight proportion;

Fair: Who connection request processing fast, to whom, by default is not supported (need to install third-party software);

Using the Ip_hash method:

Configuration:

Upstream Webgrp {

Ip_hash;

Server 192.168.1.20;

Server 192.168.1.21;

}

Test:

[Email protected] ~]# elinks--dump 1.1.1.254

192.168.1.20:www

[Email protected] ~]# elinks--dump 1.1.1.254

192.168.1.20:www

[Email protected] ~]# elinks--dump 1.1.1.254

192.168.1.20:www

[Email protected] ~]# elinks--dump 1.1.1.254

192.168.1.20:www

[Email protected] ~]# elinks--dump 1.1.1.254

192.168.1.20:www

[Email protected] ~]# elinks--dump 1.1.1.254

192.168.1.20:www

[Email protected] ~]# elinks--dump 1.1.1.254

192.168.1.20:www

[Email protected] ~]# elinks--dump 1.1.1.254

192.168.1.20:www

[Email protected] ~]# elinks--dump 1.1.1.254

192.168.1.20:www

[Email protected] ~]# elinks--dump 1.1.1.254

192.168.1.20:www

* * You can see that each access is the same Web server;

This article is from the "9379746" blog, please be sure to keep this source http://9389746.blog.51cto.com/9379746/1585185

Nginx reverse proxy and server group status