RHEL 6.5----Nginx负载均衡

实验环境

主机名	IP
master	192.168.30.130
node-1	192.168.30.131
node-2	192.168.30.132

在master上安装

本次安装过程统一采用YUM的方式，比较快，也省的出各种问题
首先在本地yum源里面添加
[root@master ~]# vim /etc/yum.repos.d/rhel-source.repo
[rhel-source]
name=Red Hat Enterprise Linux $releasever - $basearch - Source
baseurl=file:///media/cdrom
enabled=
gpgcheck=
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release

[nginx]
name=nginx repo
baseurl=http://nginx.org/packages/rhel/6/$basearch/
gpgcheck=
enabled=
或者直接新建个nginx.repo文件在文件中写入
[nginx]
name=nginx repo
baseurl=http://nginx.org/packages/rhel/6/$basearch/
gpgcheck=
enabled=
完事之后，执行下面命令
[root@master ~]# yum install -y zlib zlib-devel openssl openssl-devel pcre pcre-devel nginx

如果是源码编译安装的，可能没有nginx用户需要手动添加，但是这里yum安装的，就不需要添加了

[root@master ~]# id nginx
uid=(nginx) gid=(nginx) groups=(nginx)

启动nginx

[root@master ~]# /etc/init.d/nginx start
Starting nginx:                                            [  OK  ]
[root@master ~]# /etc/init.d/nginx status
-b (pid  ) is running...

测试nginx

配置分发器实现动静分离

[root@master ~]# cp /etc/nginx/conf.d/default.conf{,.bak}
[root@master ~]# cd /etc/nginx/
[root@master nginx]# ls
conf.d          koi-utf  mime.types  nginx.conf   uwsgi_params
fastcgi_params  koi-win  modules     scgi_params  win-utf
[root@master nginx]# cp nginx.conf{,.bak}
[root@master nginx]# vim nginx.conf  #末尾添加
 upstream htmlservers {
        server 192.168.30.131:;
        server 192.168.30.132:;
    }
    upstream phpservers {
        server 192.168.30.131:;
        server 192.168.30.132:;
    }
    upstream picservers {
        server 192.168.30.131:;
        server 192.168.30.132:;
    }
}
"nginx.conf" 44L, 902C written
[root@master conf.d]# vim default.conf
server {
    listen       ;
    server_name  localhost;

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

    location / {
        root   /usr/share/nginx/html;
        index  index.html index.htm;
        if ($request_uri ~* \.html$) {
                proxy_pass http://htmlservers;
        }
        if ($request_uri ~* \.php) {
                proxy_pass http://phpservers;
        }
                proxy_pass http://picservers;
    }

测试配置文件是否配置正确

[root@master ~]# /etc/init.d/nginx configtest
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful

在node-1上

[root@node- ~]# yum install -y php httpd
[root@node- ~]# echo "<h1>Static-Web-Server:192.168.30.131</h1>" > /var/www/html/index.html
[root@node- ~]# echo "<h1>Web-Server:192.168.30.131</h1><?php phpinfo(); ?>" > /var/www/html/index.php
[root@node- ~]# rz
[root@node- ~]# mv .jpg /var/www/html/
[root@node- ~]# service httpd restart
Stopping httpd:                                            [  OK  ]
Starting httpd:                                            [  OK  ]
[root@node- ~]# ls /var/www/html/
.jpg  index.html  index.php

node-2做相同操作，只是将测试页面的内容改下

[root@node- ~]# echo "<h1>Web-Server:192.168.30.132</h1>" > /var/www/html/index.html
[root@node- ~]# echo "<h1>Web-Server:192.168.30.132</h1><?php phpinfo(); ?>" > /var/www/html/index.php
[root@node- ~]# rz
[root@node- ~]# mv .jpg /var/www/html/
[root@node- ~]# ls /var/www/html/
.jpg  index.html  index.php
[root@node- ~]# service httpd restart

测试

[root@master ~]# /etc/init.d/nginx reload
Reloading nginx:                                           [  OK  ]

首先直接测试web-server，看是否正常

然后测试分发器

刷新之后

按F5刷新

压力测试

[root@node- ~]# ab -c  -n  http://192.168.30.130/index.html
This is ApacheBench, Version 2.3 <$Revision:  $>
Copyright  Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking 192.168.30.130 (be patient)
Completed  requests
Completed  requests
Completed  requests
Completed  requests
Completed  requests
Completed  requests
Completed  requests
Completed  requests
Completed  requests
Completed  requests
Finished  requests

Server Software:        nginx/1.14.
Server Hostname:        192.168.30.130
Server Port:            

Document Path:          /index.html
Document Length:         bytes

Concurrency Level:
Time taken for tests:   1.020 seconds
Complete requests:
Failed requests:
   (Connect: , Receive: , Length: , Exceptions: )
Write errors:
Total transferred:       bytes
HTML transferred:        bytes
Requests per second:    980.42 [#/sec] (mean)
Time per request:       1019.966 [ms] (mean)
Time per request:       1.020 [ms] (mean, across all concurrent requests)
Transfer rate:          282.93 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:              32.1
Processing:         73.1
Waiting:            73.1
Total:              80.8         

Percentage of the requests served within a certain time (ms)
  %
  %
  %
  %
  %
  %
  %
  %
 %    (longest request)

[root@node- ~]# ab -c  -n  -q http://192.168.30.130/index.html
This is ApacheBench, Version 2.3 <$Revision:  $>
Copyright  Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking 192.168.30.130 (be patient)...socket: Too many open files ()
解决办法
[root@node- ~]# ulimit -a
core file size          (blocks, -c)
data seg size           (kbytes, -d) unlimited
scheduling priority             (-e)
file size               (blocks, -f) unlimited
pending signals                 (-i)
max locked memory       (kbytes, -l)
max memory size         (kbytes, -m) unlimited
open files                      (-n)
pipe size            ( bytes, -p)
POSIX message queues     (bytes, -q)
real-time priority              (-r)
stack size              (kbytes, -s)
cpu time               (seconds, -t) unlimited
max user processes              (-u)
virtual memory          (kbytes, -v) unlimited
file locks                      (-x) unlimited
[root@node- ~]# ulimit -n  #系统默认值

[root@node- ~]# ulimit -n
[root@node- ~]# ulimit -n

[root@node- ~]# ab -c  -n  -q http://192.168.30.131/index.html
This is ApacheBench, Version 2.3 <$Revision:  $>
Copyright  Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking 192.168.30.131 (be patient).....done

Server Software:        Apache/2.2.
Server Hostname:        192.168.30.131
Server Port:            

Document Path:          /index.html
Document Length:         bytes

Concurrency Level:
Time taken for tests:   1.274 seconds
Complete requests:
Failed requests:
Write errors:
Total transferred:       bytes
HTML transferred:        bytes
Requests per second:    1570.26 [#/sec] (mean)
Time per request:       1273.678 [ms] (mean)
Time per request:       0.637 [ms] (mean, across all concurrent requests)
Transfer rate:          475.61 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:           329.6
Processing:        228.9
Waiting:           228.9
Total:             386.9         

Percentage of the requests served within a certain time (ms)
  %
  %
  %
  %
  %
  %
  %
  %
 %    (longest request)
[root@node- ~]# ab -c  -n  -q http://192.168.30.130/index.html
This is ApacheBench, Version 2.3 <$Revision:  $>
Copyright  Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking 192.168.30.130 (be patient).....done

Server Software:        nginx/1.14.
Server Hostname:        192.168.30.130
Server Port:            

Document Path:          /index.html
Document Length:         bytes

Concurrency Level:
Time taken for tests:   1.081 seconds
Complete requests:
Failed requests:
   (Connect: , Receive: , Length: , Exceptions: )
Write errors:
Non-2xx responses:
Total transferred:       bytes
HTML transferred:        bytes
Requests per second:    1849.81 [#/sec] (mean)
Time per request:       1081.193 [ms] (mean)
Time per request:       0.541 [ms] (mean, across all concurrent requests)
Transfer rate:          558.97 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:           327.6
Processing:        212.8
Waiting:           212.8
Total:            351.5         

Percentage of the requests served within a certain time (ms)
  %
  %
  %
  %
  %
  %
  %
  %
 %    (longest request)