隨着nginx的發展越是成熟，nginx的高併發、高穩定性及支持反向代理等特性使得其倍受青睞。下面筆者就來對nginx+keepalived的高可用架構進行簡單搭建。筆者水平有限，僅供參考，如有不足望指正。見笑了。^_^ ^_^
一、實驗環境
系統環境：centos 6.0 x86_64
nginx版本 nginx-1.2.7
keepalived版本 keepalived-1.26.tar.gz
nginx_1 192.168.1.105 (master)
nginx_2 192.168.1.106 (backup)
vip 192.168.1.200
二、nginx安裝配置
分別在105、106倆臺實驗機器上執行下面腳本，安裝配置nginx:
#!/bin/bash
##This is a auto install nginx shell scripts.
##li 2013-03-16
##defie path
DIR1=/usr/local/src/
DIR2=/usr/local/nginx/
DIR3=http://nginx.org/download/nginx-1.2.7.tar.gz
DIR4=/usr/local/src/nginx-1.2.7.tar.gz
DIR5=nginx-1.2.7
yum install pcre pcre-devel -y
if
[ $UID -ne 0 ];then
The shell scripts user must is root or adminstrator,please change user.
sleep 3
exit
fi
if
[ ! -d $DIR2 ];then
mkdir -p /usr/local/nginx/
else
echo "The directory was exit."
fi
download ()
{
cd $DIR1 ;wget $DIR3
if
[ ! -f $DIR4 ];then
ehco 'The nginx source packages download was defeated,please check.'
else
echo 'The nginx source packages was downloaded.'
fi
}
install ()
{
tar zxvf $DIR4 ;cd $DIR5 &&./configure --prefix=$DIR2 &&make &&make install
if
[ $? -ne 0 ];then
echo 'The nginx insall was defeated,please check.'
else
echo 'The nginx was insatlled.'
fi
}
start ()
{
/usr/local/nginx/sbin/nginx &&ps -ef |grep nginx |grep -v grep
}
stop ()
{
pkill nginx
}
download &&install &&start &&stop
三、安裝配置keepalived
在105跟106上執行該腳本，內容如下：
#!/bin/bash
##auto install keepalived shell scripts.
##li 2013-03-16
##define PATH
DIR1=/usr/local/src/
DIR2=/usr/local/
DIR3=keepalived-1.2.6.tar.gz
DIR4=keepalived-1.2.6
DIR5=/usr/src/kernels/2.6.32-220.e16.x86_64/
if
[ $UID -ne 0 ];then
echo 'The shell scripts user must be root or administrator,please change user.'
sleep 3
exit 0
fi
download ()
{
cd $DIR1 ;wget http://www.keepalived.org/software/keepalived-1.2.6.tar.gz
if
[ $? -ne 0 ];then
echo 'Download keepalived source package was failed,please check network or download state.'
else
echo 'Download keepalived source package successfully.'
fi
}
install ()
{
tar zxvf $DIR3 &&cd $DIR4 &&./configure --with-kernel-dir=$DIR5 &&make &&make install
if
[ $? -ne 0 ];then
echo 'Install keepalived was failed,please check.'
else
echo 'Install keepalived successfully.'
fi
}
configure_keepalived ()
{
cp $DIR2/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/ &&cp $DIR2/etc/sysconfig/keepalived /etc/sysconfig/ &&cp $DIR2/sbin/keepalived /sbin/ &&mkdir -p /ect/keepalived.conf
if
[ $? -ne 0 ];then
echo 'Keepalived configure was failed,please check.'
else
echo 'Keepalived configure successfully.'
fi
}
PS3="Please insert select Menu:"
select i in "download" "install" "configure_keepalived"
do
$i
done （添加這五行，在執行腳本過後會隨後根據選擇的選項去執行下一步動作，方便只下載等說什麼的單一動作，執行完成後按 alt+c 退出）
! Configuration File for keepalived
global_defs {
notification_email {
}
notification_email_from [email protected]
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_script chk_nginx {
script "/data/sh/check_nginx.sh"
interval 2
weight 2
}
# VIP1
vrrp_instance VI_1 {
state MASTER
interface eth0
lvs_sync_daemon_inteface eth0
virtual_router_id 151
priority 100
advert_int 5
nopreempt
authentication {
auth_typePASS
auth_pass 1111
}
virtual_ipaddress {
192.168.1.200
}
track_script {
chk_nginx
}
}
