shell初学之nginx（负载均衡）

        创建三个以域名区分的网站a.com，b.com，c.com；访问a、b时，分别显示a、b两个网站的内容；访问c时，会出现依次显示两次a网站的内容，一次b网站的内容。

#!/bin/bash
setenforce 0
sed -i 's/=enforcing/=disabled/g' /etc/sysconfig/selinux
systemctl start firewalld
systemctl enable firewalld
yum -y install epel-*
yum -y install nginx
IP=`ifconfig |grep broad|grep -w inet |awk '{print $2}'`
mkdir -p /work/html_a /work/html_b
echo "aaaaaaaaaaaaaa" > /work/html_a/index.html
echo "bbbbbbbbbbbbbb" > /work/html_b/index.html
echo "$IP a.com" >> /etc/hosts
echo "$IP b.com" >> /etc/hosts
echo "$IP c.com" >> /etc/hosts
echo "
 server {
       listen      80;
       server_name a.com;
       location / {
       root /work/html_a;
       }
}
 server {
       listen      80;
       server_name b.com;
       location / {
       root /work/html_b;
       }
}
 server {
       listen      80;
       server_name c.com;
       location / {
       proxy_pass    http://abc;
       }
}
 upstream abc {
    server    127.0.0.1:81 weight=2;
    server    127.0.0.1:82 weight=1;
}
 server {
       listen      81;
       server_name a.com;
       location / {
       root /work/html_a;
       }
}
 server {
       listen      82;
       server_name b.com;
       location / {
       root /work/html_b;
       }
}
" > /etc/nginx/conf.d/abc.conf
nginx -t
systemctl restart nginx
systemctl enable nginx
firewall-cmd --add-port=80/tcp --permanent
firewall-cmd --reload