nginx学习负载均衡一

旧城等待， 2022-07-14 07:20 360阅读 0赞

相关环境  
192.168.3.40（apache）已发布  
192.168.3.49（nginx）已发布  
192.168.3.52（elb）  
  
  
1、相关依赖包安装  
yum update -y  
yum -y install gcc gcc+ gcc-c++  pcre pcre-devel zlib-devel openssl openssl-devel wget vim tree lsof  
  
  
2、建立nginx用户及组和软件目录  
groupadd -r nginx && useradd -r -g nginx -s /bin/false -M nginx  
mkdir -p /data /data/nginx1.6.2  
cd /data  
  
3、下载软件并安装  
\[root@elb data\]\# wget http://nginx.org/download/nginx-1.6.2.tar.gz  
\[root@elb data\]\# ls  
nginx-1.6.2.tar.gz  
\[root@elb data\]\# pwd  
/data  
\[root@elb data\]\# tar -zxvf nginx-1.6.2.tar.gz  
\[root@elb nginx-1.6.2\]\# ./configure --help | grep upstrea    默认就安装了  
  --without-http\_upstream\_ip\_hash\_module  
                                     disable ngx\_http\_upstream\_ip\_hash\_module  
  --without-http\_upstream\_least\_conn\_module  
                                     disable ngx\_http\_upstream\_least\_conn\_module  
  --without-http\_upstream\_keepalive\_module  
                                     disable ngx\_http\_upstream\_keepalive\_module  
\[root@elb nginx-1.6.2\]\# ./configure --user=nginx --group=nginx --prefix=/data/nginx1.6.2 --with-http\_stub\_status\_module --with-http\_ssl\_module  
\[root@elb nginx-1.6.2\]\#make && make install  
\[root@elb nginx-1.6.2\]\# echo $?  
0  
\[root@elb nginx-1.6.2\]\#ln -s /data/nginx1.6.2 /data/nginx  
\[root@elb data\]\# cd nginx  
\[root@elb nginx\]\# ls  
conf  html  logs  sbin  
\[root@elb sbin\]\# lsof -i :80  
COMMAND     PID  USER   FD   TYPE DEVICE SIZE/OFF NODE NAME  
clock-app  2057  root   21u  IPv4 121124      0t0  TCP 192.168.3.52:49828->42.99.254.162:http (CLOSE\_WAIT)  
nginx     43511  root    6u  IPv4 158444      0t0  TCP \*:http (LISTEN)  
nginx     43512 nginx    6u  IPv4 158444      0t0  TCP \*:http (LISTEN  
\[root@elb nginx\]\# cd conf/  
\[root@elb conf\]\# ls  
fastcgi.conf          fastcgi\_params          koi-utf  mime.types          nginx.conf          scgi\_params          uwsgi\_params          win-utf  
fastcgi.conf.default  fastcgi\_params.default  koi-win  mime.types.default  nginx.conf.default  scgi\_params.default  uwsgi\_params.default  
  
  
\[root@elb conf\]\# egrep -v "\#|~$" nginx.conf.default >nginx.conf   
\[root@elb conf\]\# vi nginx.conf  
worker\_processes  1;  
events \{  
    worker\_connections  1024;  
\}  
http \{  
    include       mime.types;  
    default\_type  application/octet-stream;  
    sendfile        on;  
    keepalive\_timeout  65;  
    server \{  
        listen       80;  
        server\_name  localhost;  
        location / \{  
            root   html;  
            index  index.html index.htm;  
        \}  
        error\_page   500 502 503 504  /50x.html;  
        location = /50x.html \{  
            root   html;  
        \}  
  
  
    \}  
  
  
\}  
官方文档  
http://nginx.org/en/docs/http/ngx\_http\_upstream\_module.html\#upstream  
Syntax: upstream name \{ ... \}  
Default: —  
Context: http  
  
  
将以下这段放入http标签  
upstream backend \{  
    server backend1.example.com weight=5;                                   域名  
    server 127.0.0.1:8080       max\_fails=3（检查web server3次失败踢出去） fail\_timeout=30s（超时时间）;                  
    server unix:/tmp/backend3;                                              socket                   
  
    server backup1.example.com  backup;                                     备份的主机      
\}  
  
  
\[root@elb conf\]\# vi nginx.conf  
worker\_processes  1;  
events \{  
    worker\_connections  1024;  
\}  
http \{  
    include       mime.types;  
    default\_type  application/octet-stream;  
    sendfile        on;  
    keepalive\_timeout  65;  
upstream backend \{  
    server 192.168.3.40:80      max\_fails=3 fail\_timeout=30s;  
    server 192.168.3.49:80      max\_fails=3 fail\_timeout=30s;  
\}  
    server \{  
        listen       80;  
        server\_name  www.wolf.com;  
        index  index.html index.htm;   
        location / \{  
           proxy\_pass http://backend;  
        \}  
        error\_page   500 502 503 504  /50x.html;  
        location = /50x.html \{  
            root   html;  
        \}  
    \}  
\}  
  
\[root@elb conf\]\# ../sbin/nginx -t  
nginx: the configuration file /data/nginx1.6.2/conf/nginx.conf syntax is ok  
nginx: configuration file /data/nginx1.6.2/conf/nginx.conf test is successful  
\[root@elb conf\]\# ../sbin/nginx -s reload  
  
  
负载均衡测试~  
1、不同的客户端ie打开  
2、脚本curl测试                      
\[root@elb conf\]\# for n in \`seq 100\`;do curl 192.168.3.52;sleep 2;done  
www.wolf.org  
www.wolf.com  
www.wolf.org  
www.wolf.com