vi /etc/rsyncd.conf

uid = root
gid = root
use chroot = no
max connections = 20
pid file = /var/run/rsyncd.pid
lock file = /var/run/rsync.lock
log file = /var/log/rsyncd.log

[data0_htdocs]
path = /data0/htdocs/
ignore errors
read only = no
hosts allow = 192.168.146.0/24
hosts deny = 0.0.0.0/32

[php_etc]
path = /usr/local/webserver/php/etc/
ignore errors
read only = no
hosts allow = 192.168.146.0/24
hosts deny = 0.0.0.0/32

[nginx_conf]
path = /usr/local/webserver/nginx/conf/
ignore errors
read only = no
hosts allow = 192.168.146.0/24
hosts deny = 0.0.0.0/32

#!/bin/sh
LANG=C
date=$(date -d "today" +"%Y-%m-%d %H:%M:%S")

#---------------配置信息(開始)---------------
#類型：主機(jī)設(shè)為master，備機(jī)設(shè)為slave
type="master"

#主機(jī)、備機(jī)切換日志路徑
logfile="/var/log/failover.log"

#MySQL可執(zhí)行文件地址，例如/usr/local/mysql/bin/mysql；MySQL用戶名；密碼；端口
mysql_bin="/usr/local/webserver/mysql/bin/mysql"
mysql_username="root"
mysql_password="123456"
mysql_port="3306"

#內(nèi)網(wǎng)網(wǎng)關(guān)
gateway_eth0="192.168.146.1"

#主機(jī)內(nèi)網(wǎng)真實(shí)IP
rip_eth0_master="192.168.146.213"

#備機(jī)內(nèi)網(wǎng)真實(shí)IP
rip_eth0_slave="192.168.146.215"

#主機(jī)、備機(jī)內(nèi)網(wǎng)共用的虛擬IP
vip_eth0_share="192.168.113.214"


#外網(wǎng)網(wǎng)關(guān)
gateway_eth1="72.249.146.193"

#主機(jī)外網(wǎng)真實(shí)IP
rip_eth1_master="72.249.146.213"

#備機(jī)外網(wǎng)真實(shí)IP
rip_eth1_slave="72.249.146.215"

#主機(jī)、備機(jī)外網(wǎng)共用的虛擬IP
vip_eth1_share="72.249.146.214"
#---------------配置信息(結(jié)束)---------------

#綁定內(nèi)、外網(wǎng)虛擬IP
function_bind_vip()
{
/sbin/ifconfig eth0:vip ${vip_eth0_share} broadcast ${vip_eth0_share} netmask 255.255.255.255 up
/sbin/route add -host ${vip_eth0_share} dev eth0:vip
/sbin/ifconfig eth1:vip ${vip_eth1_share} broadcast ${vip_eth1_share} netmask 255.255.255.255 up
/sbin/route add -host ${vip_eth1_share} dev eth1:vip
/usr/local/webserver/php/sbin/php-fpm reload
kill -USR1 `cat /usr/local/webserver/nginx/logs/nginx.pid`
/sbin/service crond start
}

#解除內(nèi)、外網(wǎng)虛擬IP
function_remove_vip()
{
/sbin/ifconfig eth0:vip ${vip_eth0_share} broadcast ${vip_eth0_share} netmask 255.255.255.255 down
/sbin/ifconfig eth1:vip ${vip_eth1_share} broadcast ${vip_eth1_share} netmask 255.255.255.255 down
/sbin/service crond stop
}

#主機(jī)向備機(jī)推送文件的函數(shù)
function_rsync_master_to_slave()
{
/usr/bin/rsync -zrtuog /data0/htdocs/ ${rip_eth0_slave}::data0_htdocs/ > /dev/null 2>&1
/usr/bin/rsync -zrtuog /usr/local/webserver/php/etc/ ${rip_eth0_slave}::php_etc/ > /dev/null 2>&1
/usr/bin/rsync -zrtuog /usr/local/webserver/nginx/conf/ ${rip_eth0_slave}::nginx_conf/ > /dev/null 2>&1
}

#備機(jī)向主機(jī)推送文件的函數(shù)
function_rsync_slave_to_master()
{
/usr/bin/rsync -zrtuog /data0/htdocs/ ${rip_eth0_master}::data0_htdocs/ > /dev/null 2>&1
/usr/bin/rsync -zrtuog /usr/local/webserver/php/etc/ ${rip_eth0_master}::php_etc/ > /dev/null 2>&1
/usr/bin/rsync -zrtuog /usr/local/webserver/nginx/conf/ ${rip_eth0_master}::nginx_conf/ > /dev/null 2>&1
}

#虛擬IP ARPing
function_vip_arping()
{
/sbin/arping -I eth0 -c 3 -s ${vip_eth0_share} ${gateway_eth0} > /dev/null 2>&1
/sbin/arping -I eth1 -c 3 -s ${vip_eth1_share} ${gateway_eth1} > /dev/null 2>&1
}

while true
do
#用HTTP協(xié)議檢查虛擬IP
if (curl -m 30 -G http://${vip_eth1_share}/ > /dev/null 2>&1) && (${mysql_bin} -u"${mysql_username}" -p"${mysql_password}" -P"${mysql_port}" -h"${vip_eth0_share}" -e"show slave status\G" > /dev/null 2>&1)
then
#取得與內(nèi)網(wǎng)VIP綁定的服務(wù)器內(nèi)網(wǎng)IP
eth0_active_server=$(${mysql_bin} -u"${mysql_username}" -p"${mysql_password}" -P"${mysql_port}" -h"${vip_eth0_share}" -e"show slave status\G" | grep "Master_Host" | awk -F ': ' '{printf $2}')

#如果內(nèi)網(wǎng)VIP=主機(jī)內(nèi)網(wǎng)IP（主機(jī)MySQL中的Master_Host顯示的是備機(jī)的域名或IP），且本機(jī)為主機(jī)
if [ "${eth0_active_server}" = "${rip_eth0_slave}" ] && [ "${type}" = "master" ]
then
function_rsync_master_to_slave
function_vip_arping
#如果內(nèi)網(wǎng)VIP=備機(jī)內(nèi)網(wǎng)IP（備機(jī)MySQL中的Master_Host顯示的是主機(jī)的域名或IP）
elif [ "${eth0_active_server}" = "${rip_eth0_master}" ]
then
if (curl -m 30 -G http://${rip_eth1_master}/ > /dev/null 2>&1) && (${mysql_bin} -u"${mysql_username}" -p"${mysql_password}" -P"${mysql_port}" -h"${rip_eth0_master}" -e"show slave status\G" | grep "Seconds_Behind_Master: 0" > /dev/null 2>&1)
then
#如果主機(jī)能夠訪問，數(shù)據(jù)庫同步無延遲，且本機(jī)就是主機(jī)，那么由本機(jī)綁定虛擬IP
if [ "${type}" = "master" ]
then
#如果本機(jī)為主機(jī)
function_bind_vip
function_vip_arping
echo "${date} 主機(jī)已綁定虛擬IP!(Type:1)" >> ${logfile}
else
#如果本機(jī)為備機(jī)
function_remove_vip
echo "${date} 備機(jī)已去除虛擬IP!(Type:2)" >> ${logfile}
fi
else
if [ "${type}" = "slave" ]
then
#如果本機(jī)為備機(jī)
function_rsync_slave_to_master
function_vip_arping
fi
fi
fi
else
#虛擬IP無法訪問時(shí)，判斷主機(jī)能否訪問
if (curl -m 30 -G http://${rip_eth1_master}/ > /dev/null 2>&1) && (${mysql_bin} -u"${mysql_username}" -p"${mysql_password}" -P"${mysql_port}" -h"${rip_eth0_master}" -e"show slave status\G" > /dev/null 2>&1)
then
#如果主機(jī)能夠訪問，且本機(jī)就是主機(jī)，那么由本機(jī)綁定虛擬IP
if [ "${type}" = "master" ]
then
function_bind_vip
function_vip_arping
echo "${date} 主機(jī)已綁定虛擬IP!(Type:3)" >> ${logfile}
else
function_remove_vip
echo "${date} 備機(jī)已去除虛擬IP!(Type:4)" >> ${logfile}
fi
elif (curl -m 30 -G http://${rip_eth1_slave}/ > /dev/null 2>&1) && (${mysql_bin} -u"${mysql_username}" -p"${mysql_password}" -P"${mysql_port}" -h"${rip_eth0_slave}" -e"show slave status\G" > /dev/null 2>&1)
then
#如果主機(jī)不能訪問而備機(jī)能夠訪問，且本機(jī)就是備機(jī)，那么由備機(jī)綁定虛擬IP
if [ "${type}" = "slave" ]
then
function_bind_vip
function_vip_arping
echo "${date} 備機(jī)已綁定虛擬IP!(Type:5)" >> ${logfile}
else
function_remove_vip
echo "${date} 主機(jī)已去除虛擬IP!(Type:6)" >> ${logfile}
fi
else
echo "${date} 主機(jī)、備機(jī)全部無法訪問!(Type:7)" >> ${logfile}
fi
fi
#每次循環(huán)暫停20秒(即間隔20秒檢測一次)
sleep 20
done